[Repeater-Builder] Re: antenna plan
I think you would be much better off getting a folded dipole antenna like a DB224 for VHF or a DB411 for UHF. You can set the dipoles to favor the town by putting 3 facing the town with one left facing the opposite direction so the "back door" isn't too badly affected. Dan N8DJP Re: antenna plan Posted by: "Paul Holm" p...@chargertech.com kc0hst Date: Thu Aug 19, 2010 7:47 pm ((PDT)) Hopefully it is not uncool to be the first to respond to one's own post. I'll take the fact that there was no flood of flames, or naysayers, to indicate that my plan is worth attempting. So as a follow-up question, I would ask, could anyone offer recommendations for a yagi, corner reflector, or other directional antenna, suitable for duplex use, with a beamwidth of no less than 30deg and a gain of no less than say 7dB? 73 Paul - Original Message - From: Paul Holm I'm looking for input on an antenna plan. I'd like to change to an ellliptical pattern that favors the bigger town in the county which is roughly at 270 deg west and about 6 miles away. I'd like to take a yagi or corner reflector and mount it lower, at the railing or a short distance up the mast, and point it at the town I'd like to focus on
Re: [Repeater-Builder] lowband HT antennas
Never mind, I went back and re-read it. All I have to say for myself is...Duh. I really shouldn't respond to things at 0515. Dan KA8YPY On Jul 1, 2010, at 5:16 AM, Barry wrote: > > > > > To: Repeater-Builder@yahoogroups.com > From: ka8...@verizon.net > Date: Thu, 1 Jul 2010 04:45:20 -0400 > Subject: Re: [Repeater-Builder] lowband HT antennas > > Ummm, shouldn't that be the other way around??? > > > > > Sigh > > > > > nah > > > > > > > 29 MHz = 10 Meters (approx.) > 150 MHz = 2 meters (approx.) > > Dan > KA8YPY > > On Jul 1, 2010, at 12:43 AM, Barry wrote: > > > > > > > Real easy to visualise > > > > consider the length of a wavelength then lay the antenna against it > > the ht stick gets shorter in comparision the lower in frequency > > > > Find it at CarPoint.com.au New, Used, Demo, Dealer or Private? > > > > > > > > Find it at CarPoint.com.au New, Used, Demo, Dealer or Private? > >
Re: [Repeater-Builder] lowband HT antennas
Ummm, shouldn't that be the other way around??? 29 MHz = 10 Meters (approx.) 150 MHz = 2 meters (approx.) Dan KA8YPY On Jul 1, 2010, at 12:43 AM, Barry wrote: > > > Real easy to visualise > > consider the length of a wavelength then lay the antenna against it > the ht stick gets shorter in comparision the lower in frequency > > Find it at CarPoint.com.au New, Used, Demo, Dealer or Private? > >
[Repeater-Builder] Re: What have I got?
Sound like a PURC unit. You have exciter at 450 mw out that goes into a tripler/low level amp that gives 2W out, that goes into the 75 watt amp which in turn drives the last stage. Not bing familiar with the model number, I would guesstimate the final out is around 350 watts. Dan N8DJP
Re: [Repeater-Builder] DB 224E Harness wanted
I can help you..email me off line --- On Wed, 5/12/10, steve wrote: From: steve Subject: [Repeater-Builder] DB 224E Harness wanted To: Repeater-Builder@yahoogroups.com Date: Wednesday, May 12, 2010, 1:20 AM Hi all, I have a DB 224E antenna that apparently has the wrong harness. When I reset the dipole spacing for the antenna, the harness was not long enough to reach the dipoles. Also, the resonant freq seems to be in the low 150 mhz range. SWR readings are very high in the 145 mhz range. Does anyone have a 138-150 range harness they want to sell? Thank you, Steve W4SEF
Re: [Repeater-Builder] Re: how far
On Mon, Apr 26, 2010 at 2:20 PM, Kris Kirby wrote: > > > On Mon, 26 Apr 2010, George wrote: > > i looked at the pdf that you refering and there is requirements for > > mesuring if the signal is more powerful than 1640 watts and the > > antenna is 10 meters or less accessibel by people...my antenna is more > > than 10 meters above the closest person and the signal is less > > powerful than 450 watts. anyway magnetic fields have no effect at the > > human body...what so ever > > You'd think that, but have a gander at the FCC Rules, Part 97.13. > > > -- > Kris Kirby, KE4AHR > Disinformation Analyst > > > Likewise it is the principal basis on how a microwave oven works, granted the frequency is slightly higher in the oven. There are many microwave ovens in the 800-900 Watt range that still manage to boil water. -- Dan Simmons KC2BEZ President North Country Amateur Radio Club W2LCA http://groups.google.com/group/w2lca
Re: [Repeater-Builder] OT: Motorola Spectra Astro VHF or UHF?
Model number indicates VHF High split 150 - 178. I t will come down to the amateur band just fine if you want to use it for that. Dan KA8YPY On Apr 22, 2010, at 8:28 PM, La Rue Communications wrote: Hi Gang - I have an Spectra Astro beleived to be a UHF. As you can see from the picture, this is a two peice unit. Radio pack and control head. I looked through the RB Archives, extensively but only found Astros that are one peice. (Control head built in) This is a former Police radio that I am trying to locate the band split. A Google search turned up something on RadioReference.com specifying it was a VHF 146-178, but that was a bit sketchy. I want to be absolutely certain what split that this radio covers. We thought it was a UHF 450-470 split, but now moreso Im stumped. Model number is: T04KLF9PW5AN FCC ID: AZ492FT3773 Thanks for your input, no matter how small! John Hymes La Rue Communications 10 S. Aurora Street Stockton, CA 95202 http://tinyurl.com/2dtngmn
Re: [Repeater-Builder] Re: HAM Mototrbo Systems
Thanks for the info Mike. Dan KA8YPY On Mar 10, 2010, at 12:19 PM, wb6wui wrote: > Dan, > > TRBO-6 network website is: www.trbo.info and has some basic info for > getting repeaters onto the network. Or checkout the yahoo group: > "mototrbousa" ...Mike, wb6...@gmail.com > > --- In Repeater-Builder@yahoogroups.com, Dan Blasberg > wrote: >> >> Mike, >> >> In the DC area there is currently one UHF machine and about 5-10 >> amateurs playing with MOTOTRBO. >> >> I would be interested to know what other areas are using for setting >> or are they leaving everything in the default setting? > > > > > > > > > Yahoo! Groups Links > > >
[Repeater-Builder] Re: Dual receivers on one antenna for RX only site
Actually, Gary, you are 180 degrees out. On a pass cavity, off frequency signals see a very high impedence path, an open not a short. If your version were true you could never use pass cans as a duplexer since both sets of cans together would show a "short" to EVERYTHING. The T connector is just an impedence bump to the radio equipment, nothing more. It is not an active device, like a preamp would be, that makes the rest of the feedline disappear. He can use the T connector and any random length of cable to connect, as long as the whole feedline doesn't show up as a resonant length. Dan N8DJP Posted by: "Gary Schafer" gascha...@comcast.net k4fmx Date: Wed Mar 10, 2010 10:47 am ((PST)) Well yes the T is sort of a magical device that makes the OTHER SIDE of the T disappear electrically. Actually it is not the T itself that does the job (that is just where IT happens) but it is the quarter wave length cables that perform the magic! Without the quarter wave length cables between the T and each set of cavities the duplexer would not work! That is what provides the 50 ohm isolation between tx and rx cans so the feed line still sees 50 ohms. The quarter wave cable effectively "disconnects" the transmitter from the feed line at the T (at the receive frequency). The quarter wave cable on the receive side of the T effectively disconnects the receive side from the feed line (at the transmit frequency). Without doing this each would load the other down and there would not be 50 ohms at the antenna port of the T. Once you are on the other side of the T (the antenna port) the feed line length has no effect on the duplexer operation. All that the quarter wave lines do on the duplexer side of the T are to give isolation to the opposite side (tx-rx) so each does not short out the feed line. A similar thing happens between can cables in a duplexer but rather than using them for isolation they are used to enhance the notch of each can by presenting a high impedance at each cans T from the previous cavity. Working with a high impedance is easier to notch out than a low impedance. The notch in the first cavity presents a short (low impedance) at the unwanted frequency and 50 ohms at the wanted frequency. By coupling the next cavity with a quarter wave length cable (at the unwanted frequency) that short is transformed to a quite high impedance at the next cavity while at the same time the wanted signal being at 50 ohms is passed to the next cavity where it sees 50 ohms and goes on its way unatenuated. But we are left with the high impedance at the unwanted frequency that was transformed by the quarter wave cable. The second cavity notch is also tuned to the unwanted frequency which it pulls down to a short (low impedance) to give further attenuation. When I say the notch presents a "short" it is not really a short but a very low impedance of say a few ohms. But by having the unwanted source impedance high rather than at 50 ohms it is much easier to pull the high impedance down with the "few ohms" short circuit than it would be if we were working at 50 ohms for the unwanted. It works like a voltage divider between the two impedances. The higher the source is (from previous cavity) to the short the more loss there will be which is just what we are looking for. In the case of the quarter wave cable to the T on the output of the duplexer we want to transform the low impedance up to a very high impedance at the T so that it does not load the circuit at that point on that frequency. 73 Gary K4FMX
[Repeater-Builder] Re: Dual receivers on one antenna for RX only site
One thing was missed regarding cable lengths. The loops in the cans are part of the equation for figuring the 1/4 wave length. I've seen that discussed here many times in postings related to inter-cable lengths on duplexers. But the 1/4 wave length issue only applies to the inter-cabling between the cans. It is my understanding that the antenna to duplexer lengths are irrelevant since the T connector and the rest of the feedline are all part of the equation. It's not like the T is some magical device that makes the rest of the feedline disappear electrically. The only time length might be a problem is if the entire feedline happens to be a resonant length. If by some chance that happens, then changing the jumper a couple of inches will clear that. Dan N8DJP Posted by: "n...@no6b.com" n...@no6b.com no6b Date: Tue Mar 9, 2010 8:29 pm ((PST)) At 3/9/2010 20:12, you wrote: >OK, question... > >If you put a cable which is 1/4-wavelength at VHF between the T and the >UHF cavity, it's 3/4-wavelength at UHF. Since any odd multiple of a >quarter wavelength will invert the impedance, what will this really >accomplish on the UHF cavity side? Doesn't matter at UHF, since the cavity "looks" like (hopefully something close to) 50 + j0 ohms @ UHF, so the cable length has no effect (other than plain ol' cable loss) @ UHF. At VHF, the short at the UHF cavity connector (I'll take Gary's word that it looks like a short off-resonance, though to be sure you'd want to put the can on a VNA to get the actual phase angle at the connector) needs to be transformed to an open at the T so it has no effect & VHF. The short-to-open transformation @ VHF is accomplished with a 1/4 wavelength of coax @ VHF. > The dual-band diplexers are usually high-pass/low-pass arrangements, and > lose something like 0.2 dB while providing 40 dB or more isolation. > Assuming you get a real one, and not something made with PIM-prne > materials, would this not be a safer bet? It's true you wouldn't need to mess with cable lengths if a cross-band diplexer were used, but OTOH it would be another piece of hardware in the system that really isn't necessary, since the cavities are already there. Plus if you're really worried about PIM, you'd probably have to move up to something like a cross-band coupler from TX-RX, which IIRC runs over $300. Bob NO6B
Re: [Repeater-Builder] Re: LMR Cable
in a duplex environment high levels of rf are likely to be present in close proximity to all associated station hardware including interconnect cables so best not to take chances on cable/connector quality. holds true of both tx and rx cabling. Dan k8plw --- On Sun, 3/7/10, Larry Horlick wrote: From: Larry Horlick Subject: Re: [Repeater-Builder] Re: LMR Cable To: Repeater-Builder@yahoogroups.com Date: Sunday, March 7, 2010, 6:46 PM So in a "duplex" application, if the supply of the better cable is limited, it's better to use it on the rx side? On Sun, Mar 7, 2010 at 6:42 PM, Dan Saputo wrote: "Real" as it refers to the original military-spec'd construction of the cable. "Type" meaning similar to original spec but likely not exact. common differences in "Type" cable might be tinned vs. silver plated conductors, dialectric material etc. Spec RG-142 has a silver-plated steel center conductor. repeated flexing can cause the thin plating to fracture off creating duplex noise. i've personally not had this problem but it is a documented issue. Dan k8plw --- On Sun, 3/7/10, Larry Horlick wrote: From: Larry Horlick Subject: Re: [Repeater-Builder] Re: LMR Cable To: Repeater-Builder@ yahoogroups. com Date: Sunday, March 7, 2010, 6:24 PM What is the difference between real and un-real RG214? And what is the problem with RG-142? lh On Sun, Mar 7, 2010 at 6:24 PM, NORM KNAPP wrote: Those are usually the preferred types of cables. You should have no problems with either of those. I prefer REAL RG214/U., but RG400/U, RG393 or RG223/U will work. Avoid RG-142 and RG-9/U. Superflex is also a good choice. Don't even think about any LMR type or similar. N5NPO Norm - Original Message - From: Repeater-Builder@ yahoogroups. com To: Repeater-Builder@ yahoogroups. com Sent: Sun Mar 07 16:54:30 2010 Subject: Re: [Repeater-Builder] Re: LMR Cable Any problems with RG-214 or RG223 for duplexers/multi- couplers/ combiners? lh On Sun, Mar 7, 2010 at 5:50 PM, Dan Saputo mailto:dan17...@yahoo. com> > wrote: well-documented and caused mainly by the use of foil shielding as in the lmr series. gets worse as cable ages and internal braid-foil contact degrades. Although not as big of a problem with lmr due to an insulating layer over the actual foil. beware of belden 9913 and lmr look-alikes. trouble when used duplex. Dan k8plw --- On Sun, 3/7/10, Chuck Kelsey mailto:wb2...@roadrunner. com> > wrote: From: Chuck Kelsey mailto:wb2...@roadrunner. com> > Subject: Re: [Repeater-Builder] Re: LMR Cable To: Repeater-Builder@ yahoogroups. com <mailto:Repeater-Builder@ yahoogroups. com> Date: Sunday, March 7, 2010, 4:56 PM Passive Intermod. In other words, it tends to be a source in which intermod can be generated easily. Chuck WB2EDV - Original Message - From: "rffun" http://us.mc560. mail.yahoo. com/mc/compose? to=radiocom% 40her.forthnet. gr> > To: http://us.mc560. mail.yahoo. com/mc/compose? to=Repeater- Builder%40yahoog roups.com> > Sent: Sunday, March 07, 2010 3:33 PM Subject: [Repeater-Builder] Re: LMR Cable > > What exactly do you mean by PIM ? > rffun > > --- In Repeater-Builder@ yahoogroups. com <http://us.mc560. mail.yahoo. > com/mc/compose? to=Repeater- Builder%40yahoog roups.com> , Larry Horlick > > wrote: >> >> Indeed. I'll read the archives. Thanks. >> >> 73 >> >> On Sun, Feb 28, 2010 at 8:59 PM, Chuck Kelsey wrote: >> >> > >> > >> > The subject comes up on this list about every other week. I can only >> > assume >> > you are new. >> > >> > LMR and similar cables are not rated for low PIM, a fact verified by >> > the >> > manufacturer. >> > >> > Chuck >> > WB2EDV >> > >> > >> > >> > - Original Message - >> > *From:* Larry Horlick >> > *To:* Repeater-Builder@ yahoogroups. com <http://us.mc560. mail.yahoo. >> > com/mc/compose? to=Repeater- Builder%40yahoog roups.com> >> > *Sent:* Sunday, February 28, 2010 8:49 PM >> > *Subject:* Re: [Repeater-Builder] Micor Stock Power Supplies >> > >> > I've never heard of it. As an installer, I'm always under pressure to >> > use >> > less expensive feedlines than the venerable Heliax, and I had often >> > considered LMR, but never actually succumbed to the temptation. This is >> > interesting information. Is this a well documented phenomenon? >> > >> > Anyone else like to chime in on this... >> > >> > Larry >> > >> > >> > >> > >> > >> > > > > > - - -- > > > > Yahoo! Groups Links > > > - - - - - - No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.733 / Virus Database: 271.1.1/2728 - Release Date: 03/07/10 02:34:00
Re: [Repeater-Builder] Re: LMR Cable
"Real" as it refers to the original military-spec'd construction of the cable. "Type" meaning similar to original spec but likely not exact. common differences in "Type" cable might be tinned vs. silver plated conductors, dialectric material etc. Spec RG-142 has a silver-plated steel center conductor. repeated flexing can cause the thin plating to fracture off creating duplex noise. i've personally not had this problem but it is a documented issue. Dan k8plw --- On Sun, 3/7/10, Larry Horlick wrote: From: Larry Horlick Subject: Re: [Repeater-Builder] Re: LMR Cable To: Repeater-Builder@yahoogroups.com Date: Sunday, March 7, 2010, 6:24 PM What is the difference between real and un-real RG214? And what is the problem with RG-142? lh On Sun, Mar 7, 2010 at 6:24 PM, NORM KNAPP wrote: Those are usually the preferred types of cables. You should have no problems with either of those. I prefer REAL RG214/U., but RG400/U, RG393 or RG223/U will work. Avoid RG-142 and RG-9/U. Superflex is also a good choice. Don't even think about any LMR type or similar. N5NPO Norm - Original Message - From: Repeater-Builder@ yahoogroups. com To: Repeater-Builder@ yahoogroups. com Sent: Sun Mar 07 16:54:30 2010 Subject: Re: [Repeater-Builder] Re: LMR Cable Any problems with RG-214 or RG223 for duplexers/multi- couplers/ combiners? lh On Sun, Mar 7, 2010 at 5:50 PM, Dan Saputo mailto:dan17...@yahoo. com> > wrote: well-documented and caused mainly by the use of foil shielding as in the lmr series. gets worse as cable ages and internal braid-foil contact degrades. Although not as big of a problem with lmr due to an insulating layer over the actual foil. beware of belden 9913 and lmr look-alikes. trouble when used duplex. Dan k8plw --- On Sun, 3/7/10, Chuck Kelsey mailto:wb2...@roadrunner. com> > wrote: From: Chuck Kelsey mailto:wb2...@roadrunner. com> > Subject: Re: [Repeater-Builder] Re: LMR Cable To: Repeater-Builder@ yahoogroups. com <mailto:Repeater-Builder@ yahoogroups. com> Date: Sunday, March 7, 2010, 4:56 PM Passive Intermod. In other words, it tends to be a source in which intermod can be generated easily. Chuck WB2EDV - Original Message - From: "rffun" http://us.mc560. mail.yahoo. com/mc/compose? to=radiocom% 40her.forthnet. gr> > To: http://us.mc560. mail.yahoo. com/mc/compose? to=Repeater- Builder%40yahoog roups.com> > Sent: Sunday, March 07, 2010 3:33 PM Subject: [Repeater-Builder] Re: LMR Cable > > What exactly do you mean by PIM ? > rffun > > --- In Repeater-Builder@ yahoogroups. com <http://us.mc560. mail.yahoo. > com/mc/compose? to=Repeater- Builder%40yahoog roups.com> , Larry Horlick > > wrote: >> >> Indeed. I'll read the archives. Thanks. >> >> 73 >> >> On Sun, Feb 28, 2010 at 8:59 PM, Chuck Kelsey wrote: >> >> > >> > >> > The subject comes up on this list about every other week. I can only >> > assume >> > you are new. >> > >> > LMR and similar cables are not rated for low PIM, a fact verified by >> > the >> > manufacturer. >> > >> > Chuck >> > WB2EDV >> > >> > >> > >> > - Original Message - >> > *From:* Larry Horlick >> > *To:* Repeater-Builder@ yahoogroups. com <http://us.mc560. mail.yahoo. >> > com/mc/compose? to=Repeater- Builder%40yahoog roups.com> >> > *Sent:* Sunday, February 28, 2010 8:49 PM >> > *Subject:* Re: [Repeater-Builder] Micor Stock Power Supplies >> > >> > I've never heard of it. As an installer, I'm always under pressure to >> > use >> > less expensive feedlines than the venerable Heliax, and I had often >> > considered LMR, but never actually succumbed to the temptation. This is >> > interesting information. Is this a well documented phenomenon? >> > >> > Anyone else like to chime in on this... >> > >> > Larry >> > >> > >> > >> > >> > >> > > > > > - - -- > > > > Yahoo! Groups Links > > > - - - - - - No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.733 / Virus Database: 271.1.1/2728 - Release Date: 03/07/10 02:34:00
Re: [Repeater-Builder] Re: LMR Cable
none i'm aware of. mil-spec rg-214 or 223 has silver-plated conductors. the best interconnect cable to use in my opinion would be a smaller diameter heliax such as FSJ1-50A if you can get away with it. Dan k8plw --- On Sun, 3/7/10, Larry Horlick wrote: From: Larry Horlick Subject: Re: [Repeater-Builder] Re: LMR Cable To: Repeater-Builder@yahoogroups.com Date: Sunday, March 7, 2010, 5:54 PM Any problems with RG-214 or RG223 for duplexers/multi- couplers/ combiners? lh On Sun, Mar 7, 2010 at 5:50 PM, Dan Saputo wrote: well-documented and caused mainly by the use of foil shielding as in the lmr series. gets worse as cable ages and internal braid-foil contact degrades. Although not as big of a problem with lmr due to an insulating layer over the actual foil. beware of belden 9913 and lmr look-alikes. trouble when used duplex. Dan k8plw --- On Sun, 3/7/10, Chuck Kelsey wrote: From: Chuck Kelsey Subject: Re: [Repeater-Builder] Re: LMR Cable To: Repeater-Builder@ yahoogroups. com Date: Sunday, March 7, 2010, 4:56 PM Passive Intermod. In other words, it tends to be a source in which intermod can be generated easily. Chuck WB2EDV - Original Message - From: "rffun" To: Sent: Sunday, March 07, 2010 3:33 PM Subject: [Repeater-Builder] Re: LMR Cable > > What exactly do you mean by PIM ? > rffun > > --- In Repeater-Builder@ yahoogroups. com, Larry Horlick > wrote: >> >> Indeed. I'll read the archives. Thanks. >> >> 73 >> >> On Sun, Feb 28, 2010 at 8:59 PM, Chuck Kelsey wrote: >> >> > >> > >> > The subject comes up on this list about every other week. I can only >> > assume >> > you are new. >> > >> > LMR and similar cables are not rated for low PIM, a fact verified by >> > the >> > manufacturer. >> > >> > Chuck >> > WB2EDV >> > >> > >> > >> > - Original Message - >> > *From:* Larry Horlick >> > *To:* Repeater-Builder@ yahoogroups. com >> > *Sent:* Sunday, February 28, 2010 8:49 PM >> > *Subject:* Re: [Repeater-Builder] Micor Stock Power Supplies >> > >> > I've never heard of it. As an installer, I'm always under pressure to >> > use >> > less expensive feedlines than the venerable Heliax, and I had often >> > considered LMR, but never actually succumbed to the temptation. This is >> > interesting information. Is this a well documented phenomenon? >> > >> > Anyone else like to chime in on this... >> > >> > Larry >> > >> > >> > >> > >> > >> > > > > > - - -- > > > > Yahoo! Groups Links > > > - - - - - - No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.733 / Virus Database: 271.1.1/2728 - Release Date: 03/07/10 02:34:00
Re: [Repeater-Builder] Re: LMR Cable
well-documented and caused mainly by the use of foil shielding as in the lmr series. gets worse as cable ages and internal braid-foil contact degrades. Although not as big of a problem with lmr due to an insulating layer over the actual foil. beware of belden 9913 and lmr look-alikes. trouble when used duplex. Dan k8plw --- On Sun, 3/7/10, Chuck Kelsey wrote: From: Chuck Kelsey Subject: Re: [Repeater-Builder] Re: LMR Cable To: Repeater-Builder@yahoogroups.com Date: Sunday, March 7, 2010, 4:56 PM Passive Intermod. In other words, it tends to be a source in which intermod can be generated easily. Chuck WB2EDV - Original Message - From: "rffun" To: Sent: Sunday, March 07, 2010 3:33 PM Subject: [Repeater-Builder] Re: LMR Cable > > What exactly do you mean by PIM ? > rffun > > --- In Repeater-Builder@ yahoogroups. com, Larry Horlick > wrote: >> >> Indeed. I'll read the archives. Thanks. >> >> 73 >> >> On Sun, Feb 28, 2010 at 8:59 PM, Chuck Kelsey wrote: >> >> > >> > >> > The subject comes up on this list about every other week. I can only >> > assume >> > you are new. >> > >> > LMR and similar cables are not rated for low PIM, a fact verified by >> > the >> > manufacturer. >> > >> > Chuck >> > WB2EDV >> > >> > >> > >> > - Original Message - >> > *From:* Larry Horlick >> > *To:* Repeater-Builder@ yahoogroups. com >> > *Sent:* Sunday, February 28, 2010 8:49 PM >> > *Subject:* Re: [Repeater-Builder] Micor Stock Power Supplies >> > >> > I've never heard of it. As an installer, I'm always under pressure to >> > use >> > less expensive feedlines than the venerable Heliax, and I had often >> > considered LMR, but never actually succumbed to the temptation. This is >> > interesting information. Is this a well documented phenomenon? >> > >> > Anyone else like to chime in on this... >> > >> > Larry >> > >> > >> > >> > >> > >> > > > > > - - -- > > > > Yahoo! Groups Links > > > - - - - - - No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.733 / Virus Database: 271.1.1/2728 - Release Date: 03/07/10 02:34:00
RE: [Repeater-Builder] Re: Interference
Hi Leroy, My UHF machine is a 100-watt mastr ii repeater. This has been on the air for the past 5 years and ran flawlessly. I've worked on many vhf mastr ii's for fellow repeater owners over the years. Have been used by hams for years and generally perform very well. Good rf specs, highly selective rx, although not as sensitive as most modern day receivers hams are used to. They are easily repaired if need-be. One of the easiest radios to interface and tune up. A fine choice for a repeater. concerning your interference, a receiver with better front end selectivity and a different 1st. IF freq. might be an inexpensive and worthwhile test you could try 1st. before moving on to other ideas. Hope this helps. Dan k8plw --- On Fri, 3/5/10, Leroy A. M. Baptiste wrote: From: Leroy A. M. Baptiste Subject: RE: [Repeater-Builder] Re: Interference To: Repeater-Builder@yahoogroups.com Date: Friday, March 5, 2010, 9:23 AM Dan, have you had any experience using the GE Mastr 11 as a repeater, and if so what are your thoughts on it. -Original Message- From: Repeater-Builder@ yahoogroups. com [mailto:Repeater-Builder@ yahoogroups. com] On Behalf Of Dan Saputo Sent: Friday, March 05, 2010 12:25 PM To: Repeater-Builder@ yahoogroups. com Subject: RE: [Repeater-Builder] Re: Interference Hi Leroy, Sounds like its coming straight into the antenna connector on rx since you mentioned it keeps the repeater keyed. If I'm not mistaken you also mentioned it cycles w/repeater tx? I'm guessing this is a commercial site with other systems in addition to your machine and the FM broadcast transmitters? The WP-641 duplexer you're using is a great duplexer, but doesn't offer much protection beyond the specific pass-reject frequencies its tuned for. Have you ever tried a different receiver on your system? It'd be interesting to connect another (high quality) receiver in place of what you have now as a test. Or try adding a bandpass cavity between rx and duplexer. Another pass cavity and/or isolator on the tx side might be a big help too. Dan k8plw --- On Thu, 3/4/10, Leroy A. M. Baptiste wrote: From: Leroy A. M. Baptiste Subject: RE: [Repeater-Builder] Re: Interference To: Repeater-Builder@ yahoogroups. com Date: Thursday, March 4, 2010, 8:44 PM Hi Laryn, no I did not get a chance to answer your questions, but here goes. The interference is holding the squelch open on the repeater receiver sometimes, which by extension holds the transmitter on, or cycles it, based on the interference into the receiver. The interference audio is not clean, it is distorted, the interference is not always there when you key up. Like I mentioned before, turning the FM transmitter off cures the problem. Hope that helps, and many thanks for your help. -Original Message- From: Repeater-Builder@ yahoogroups. com <http://us.mc560. mail.yahoo. com/mc/compose? to=Repeater- Builder%40yahoog roups.com> [mailto:Repeater- Builder@ yahoogroups. com <http://us.mc560. mail.yahoo. com/mc/compose? to=Repeater- Builder%40yahoog roups.com> ] On Behalf Of larynl2 Sent: Friday, March 05, 2010 9:19 AM To: Repeater-Builder@ yahoogroups. com <http://us.mc560. mail.yahoo. com/mc/compose? to=Repeater- Builder%40yahoog roups.com> Subject: [Repeater-Builder] Re: Interference Leroy, perhaps you answered my questions from earlier today and I missed your answers. If you answered I apologize. So here they are again. > --- In Repeater-Builder@ yahoogroups. com <http://us.mc560. mail.yahoo. > com/mc/compose? to=Repeater- Builder%40yahoog roups.com> <mailto:Repeater- Builder%40yahoog roups.com> , "Leroy A. M. Baptiste" wrote: > > > > When you key up the repeater, and you release, the > > repeater is held open (Sometimes) > What do you mean by "held open"? Is the interference opening/keeping open the squelch of the repeater receiver, or are you hearing it with the squelch closed during the TX tail? > > , and you can > > hear the interference coming in. Is the interference audio relatively clean/undistorted, or loud, raspy, distorted? Is the interference always there, or quite intermittent? Laryn K8TVZ
RE: [Repeater-Builder] Re: Interference
Hi Leroy, Sounds like its coming straight into the antenna connector on rx since you mentioned it keeps the repeater keyed. If I'm not mistaken you also mentioned it cycles w/repeater tx? I'm guessing this is a commercial site with other systems in addition to your machine and the FM broadcast transmitters? The WP-641 duplexer you're using is a great duplexer, but doesn't offer much protection beyond the specific pass-reject frequencies its tuned for. Have you ever tried a different receiver on your system? It'd be interesting to connect another (high quality) receiver in place of what you have now as a test. Or try adding a bandpass cavity between rx and duplexer. Another pass cavity and/or isolator on the tx side might be a big help too. Dan k8plw --- On Thu, 3/4/10, Leroy A. M. Baptiste wrote: From: Leroy A. M. Baptiste Subject: RE: [Repeater-Builder] Re: Interference To: Repeater-Builder@yahoogroups.com Date: Thursday, March 4, 2010, 8:44 PM Hi Laryn, no I did not get a chance to answer your questions, but here goes. The interference is holding the squelch open on the repeater receiver sometimes, which by extension holds the transmitter on, or cycles it, based on the interference into the receiver. The interference audio is not clean, it is distorted, the interference is not always there when you key up. Like I mentioned before, turning the FM transmitter off cures the problem. Hope that helps, and many thanks for your help. -Original Message- From: Repeater-Builder@ yahoogroups. com [mailto:Repeater-Builder@ yahoogroups. com] On Behalf Of larynl2 Sent: Friday, March 05, 2010 9:19 AM To: Repeater-Builder@ yahoogroups. com Subject: [Repeater-Builder] Re: Interference Leroy, perhaps you answered my questions from earlier today and I missed your answers. If you answered I apologize. So here they are again. > --- In Repeater-Builder@ yahoogroups. com <mailto:Repeater- Builder%40yahoog roups.com> , "Leroy A. M. Baptiste" wrote: > > > > When you key up the repeater, and you release, the > > repeater is held open (Sometimes) > What do you mean by "held open"? Is the interference opening/keeping open the squelch of the repeater receiver, or are you hearing it with the squelch closed during the TX tail? > > , and you can > > hear the interference coming in. Is the interference audio relatively clean/undistorted, or loud, raspy, distorted? Is the interference always there, or quite intermittent? Laryn K8TVZ
[Repeater-Builder] Re: Motorola cabinet key
If it is the double sided key then its a 2553. If the cabinet has an external handle that the lock is in its a CH751. For some reason Motherola used a different key on the 6' cabinets than on the shorter (Compa) cabinets. Unfortunately I don't have a spare, but they are made by Chicago Lock Co. and they should be able to sell you what you need. Dan N8DJP
[Repeater-Builder] Re: Unlawful in Il to Rebroadcast Public Safety Communications
What seems to be getting overlooked by everyone including the Illinois legislature is that they have NO authority to pass any law governing how the airwaves are used. The communications act gives SOLE jurisdiction over the airwaves to the FCC, period. If they pass this law and then try to prosecute someone they could be in for a world of hurt from a federal lawsuit filed by the victim, a suit that the state could not possibly win. Just one man's thoughts. Dan N8DJP Re: Unlawful in Il to Rebroadcast Public Safety Communications Posted by: "Walter H" walter.howard...@gmail.com ka1jfy Date: Fri Feb 19, 2010 1:33 pm ((PST)) What /I/ can add, is that the FCC has said that if you want privacy for your communications, then encrypt them. Clear voice is available to anyone with the appropriate receiver. No, I can't find my source for this, I've read all the Daily Digests for the last 5+ years, and I believe it was in a letter ruling. BTW, if you go to the url listed, you'll see that it's still in committee. Not passed by the House nor Senate, nor signed by the Governor. WalterH
Re: [Repeater-Builder] HAM Mototrbo Systems
Thanks Mike. Bookmarked. Dan On Feb 15, 2010, at 12:53 AM, wrote: > > > Sounds good well look for you on the air. By that time you may want > to look at the web site to see if there are any more on line. www.rmham.org > > > > Mike Mullarkey K7PFJ > 6886 Sage Ave > Firestone, Co 80504 > 303-736-9693 > > > From: Repeater-Builder@yahoogroups.com > [mailto:Repeater-Builder@yahoogroups.com > ] On Behalf Of Dan Blasberg > Sent: Sunday, February 14, 2010 10:26 PM > To: Repeater-Builder@yahoogroups.com > Subject: Re: [Repeater-Builder] HAM Mototrbo Systems > > > Mike, > > Thanks for the info, next time I am through your neck of the woods on > my way to visit family, i will load up your machine in the HT. > > Dan > KA8YPY > > On Feb 15, 2010, at 12:00 AM, > wrote: > > > > > > > Hi Dan, > > > > Agree with the TDMA upgrade but were not supposed to talk about that > > now, ha ha. > > > > I think most of us who are installing the trbo systems are using > > color code 1 and some could be using other codes. I think it would > > be neat if there were a web site that compiled all the systems > > owners could login and add their information to their prospective > > users. > > > > I am going to keep our system on color code 1 using IPSC IP Site > > Connect. Slot 1 is for local traffic and slot 2 is for IPSC IP Site > > Connect. > > > > > > Mike Mullarkey K7PFJ > > 6886 Sage Ave > > Firestone, Co 80504 > > 303-736-9693 > > > > > > From: Repeater-Builder@yahoogroups.com > > [mailto:Repeater-Builder@yahoogroups.com > > ] On Behalf Of Dan Blasberg > > Sent: Sunday, February 14, 2010 9:14 PM > > To: Repeater-Builder@yahoogroups.com > > Subject: Re: [Repeater-Builder] HAM Mototrbo Systems > > > > > > The Phase 2 P25 standard is far from complete. > > > > And yes, there are several TDMA "TYPE 2" systems up and working, but > > none are certified "PHASE 2" P25 systems. > > > > I know in our county, the contract written with Motorola includes a > > statement about upgrading the system to an approved/certified > Phase 2 > > system when the standard is complete, at no cost to the county. This > > not only includes infrustructure, but all of the radios as well. > > > > Now, back to the topic at had...MOTOTRBO Amateur Systems....Is > > everyone leaving the system setting in there respective defaults, or > > is there some recommendation for settings? > > > > Dan > > KA8YPY > > > > On Feb 14, 2010, at 9:40 PM, MCH wrote: > > > > > I think the Phase II standard is pretty much a done deal, it > will be > > > TDMA, and there are already Phase II systems on the air. > > > > > > Joe M. > > > > > > Dan Blasberg wrote: > > >> P25 phase 2 is indeed supposed to be TDMA, the question is will > > it be > > >> Motorola's implementation or another? Just because Motorola comes > > >> out > > >> with a system first does not always mean it will be accepted as > the > > >> defacto standard, as was not the case with Motorola VSLEP for > their > > >> 1st digital implementation. > > >> > > >> Dan > > >> KA8YPY > > >> > > >> > > >> > > >> On Feb 14, 2010, at 5:14 PM, wrote: > > >> > > >>> > > >>> I am aware of the repeaters in Cal and that is awesome. The new > > APX > > >>> series radio is TDMA compliant and if past history continues to > > >>> prevail the TDMA phase 2 P25 will be TDMA. > > >>> > > >>> > > >>> Mike Mullarkey K7PFJ > > >>> > > >>> > > >>> > > >>> From: Repeater-Builder@yahoogroups.com > > >>> [mailto:Repeater-Builder@yahoogroups.com > > >>> ] On Behalf Of Gary > > >>> Sent: Sunday, February 14, 2010 1:38 PM > > >>> To: Repeater-Builder@yahoogroups.com > > >>> Subject: RE: [Repeater-Builder] HAM Mototrbo Systems > > >>> > > >>> > > >>> Here in Southern CA. (LA, Orange, and San Diego counties) we > > have at > > >>> least 4 > > >>> Mototrbo repeaters running AND IPSC linked on the amateur band. > > >>> There are > > >>> more than two dozen users known to have invested in Trbo radios > > with > > >&g
Re: [Repeater-Builder] HAM Mototrbo Systems
Mike, Thanks for the info, next time I am through your neck of the woods on my way to visit family, i will load up your machine in the HT. Dan KA8YPY On Feb 15, 2010, at 12:00 AM, wrote: > > > Hi Dan, > > Agree with the TDMA upgrade but were not supposed to talk about that > now, ha ha. > > I think most of us who are installing the trbo systems are using > color code 1 and some could be using other codes. I think it would > be neat if there were a web site that compiled all the systems > owners could login and add their information to their prospective > users. > > I am going to keep our system on color code 1 using IPSC IP Site > Connect. Slot 1 is for local traffic and slot 2 is for IPSC IP Site > Connect. > > > Mike Mullarkey K7PFJ > 6886 Sage Ave > Firestone, Co 80504 > 303-736-9693 > > > From: Repeater-Builder@yahoogroups.com > [mailto:Repeater-Builder@yahoogroups.com > ] On Behalf Of Dan Blasberg > Sent: Sunday, February 14, 2010 9:14 PM > To: Repeater-Builder@yahoogroups.com > Subject: Re: [Repeater-Builder] HAM Mototrbo Systems > > > The Phase 2 P25 standard is far from complete. > > And yes, there are several TDMA "TYPE 2" systems up and working, but > none are certified "PHASE 2" P25 systems. > > I know in our county, the contract written with Motorola includes a > statement about upgrading the system to an approved/certified Phase 2 > system when the standard is complete, at no cost to the county. This > not only includes infrustructure, but all of the radios as well. > > Now, back to the topic at had...MOTOTRBO Amateur SystemsIs > everyone leaving the system setting in there respective defaults, or > is there some recommendation for settings? > > Dan > KA8YPY > > On Feb 14, 2010, at 9:40 PM, MCH wrote: > > > I think the Phase II standard is pretty much a done deal, it will be > > TDMA, and there are already Phase II systems on the air. > > > > Joe M. > > > > Dan Blasberg wrote: > >> P25 phase 2 is indeed supposed to be TDMA, the question is will > it be > >> Motorola's implementation or another? Just because Motorola comes > >> out > >> with a system first does not always mean it will be accepted as the > >> defacto standard, as was not the case with Motorola VSLEP for their > >> 1st digital implementation. > >> > >> Dan > >> KA8YPY > >> > >> > >> > >> On Feb 14, 2010, at 5:14 PM, wrote: > >> > >>> > >>> I am aware of the repeaters in Cal and that is awesome. The new > APX > >>> series radio is TDMA compliant and if past history continues to > >>> prevail the TDMA phase 2 P25 will be TDMA. > >>> > >>> > >>> Mike Mullarkey K7PFJ > >>> > >>> > >>> > >>> From: Repeater-Builder@yahoogroups.com > >>> [mailto:Repeater-Builder@yahoogroups.com > >>> ] On Behalf Of Gary > >>> Sent: Sunday, February 14, 2010 1:38 PM > >>> To: Repeater-Builder@yahoogroups.com > >>> Subject: RE: [Repeater-Builder] HAM Mototrbo Systems > >>> > >>> > >>> Here in Southern CA. (LA, Orange, and San Diego counties) we > have at > >>> least 4 > >>> Mototrbo repeaters running AND IPSC linked on the amateur band. > >>> There are > >>> more than two dozen users known to have invested in Trbo radios > with > >>> interest growing steadily. Given the behind-the-scenes Mototrbo > >>> activity > >>> that has been taking place over the past two years in amateur > radio > >>> it's > >>> become increasingly clear that the system works well and that > >>> Motorola is > >>> continuing to improve or release features and tools all the time. > >>> They > >>> really hope APCO adopts their TDMA format as the next generation > of > >>> P25 but > >>> that is yet to be seen meanwhile Motorola is clearly focused on > >>> developing > >>> the Mototrbo platform. > >>> Gary > >>> > >>> -Original Message- > >>> From: Repeater-Builder@yahoogroups.com > >>> [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Dan > Blasberg > >>> Sent: Sunday, February 14, 2010 10:12 AM > >>> To: Repeater-Builder@yahoogroups.com > >>> Subject: Re: [Repeater-Builder] HAM Mototrbo Systems > >>> > >>> Mike, > >>> > >>> In the DC area there is currently one UHF machine and about 5-10 > >>> amateurs playing with MOTOTRBO. > >>> > >>> I would be interested to know what other areas are using for > setting > >>> or are they leaving everything in the default setting? > >>> > >>> Dan > >>> KA8YPY > >>> > >>> > >>> > >>> > >> > >> > >> > >> > >> > >> > >> > >> Yahoo! Groups Links > >> > >> > >> > >> > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > >
Re: [Repeater-Builder] Re: Trbo to be DOA 2012 Say Hello to Tetra
Mike, I see your point for the commercial side, but how many amateur groups are going upgrade firmware on a repeater after it is up and working? How many are going to upgrade firmware on a machine that doesn't need it before they put it into operation? But there is plenty of non software equipment still out there that will eventually be surplus, and as for the firmware/software upgrade to remove 25KHz, I don't see it happening (at least not from Motorola) when the manufacturers can make more money selling new equipment as opposed to a firmware upgrade. Just my .02. Dan KA8YPY On Feb 15, 2010, at 12:07 AM, wrote: > > > Dan, there will be a time when we cant get a wide band commercial > repeater that we use for our beloved 25khz analog repeaters anymore. > Here in under 2 years when the FCC requires all manufactures to stop > building wideband equipment and everyone in the commercial band to > be at a 12.5khz emission. > > There are rumors floating around that firmware releases for > programmable equipment may include the removal of the 25khz option > in that equipment. Not good for hams. How would you like to be on a > hill top and flash your GE Master 3 or Motorola Quantar or a MTR2000 > to the latest firmware and find out it will only do 12.5khz. Watch > out as the time is coming. > > > Mike Mullarkey K7PFJ > 6886 Sage Ave > Firestone, Co 80504 > 303-736-9693 > > > From: Repeater-Builder@yahoogroups.com > [mailto:Repeater-Builder@yahoogroups.com > ] On Behalf Of Dan Blasberg > Sent: Sunday, February 14, 2010 9:24 PM > To: Repeater-Builder@yahoogroups.com > Subject: Re: [Repeater-Builder] Re: Trbo to be DOA 2012 Say Hello to > Tetra > > > Why would anyone have to start talking about a 6.25 Bandplan? > > Since naroowbanding does not apply to amateur radio, what makes you > think any of the equipment manufacturers will make narrowband specific > equipment? > > Yes, FMN is an option on some amateur rigs, but not all. And with the > narrow band compliance for part 95 and other commercial users, there > should be no shortage of wide band repeater equipment for years to > come. > > I'm just asking to see where your perspective is coming from. > > Dan > KA8YPY > > On Feb 14, 2010, at 10:59 PM, lenaw12 wrote: > > > --- In Repeater-Builder@yahoogroups.com, "j.cherry377" > > wrote: > > > > "...My question is when will the 440 and 2m bands start talking > > about making a > > unified 6.25 kc divisible bandplan and apply it nationwide? They > > will have to do > > it so might as well get started talking about it. I know that there > > are a lot of > > people with 25/30 kc radios that are not going to care for hearing > > about this..." > > > > I can see a band split and reallocation of wider modes into one > > portion of each ham band with the narrow/digital modes holding court > > in another. > > > > LW > > > > > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > >
Re: [Repeater-Builder] Re: Trbo to be DOA 2012 Say Hello to Tetra
Why would anyone have to start talking about a 6.25 Bandplan? Since naroowbanding does not apply to amateur radio, what makes you think any of the equipment manufacturers will make narrowband specific equipment? Yes, FMN is an option on some amateur rigs, but not all. And with the narrow band compliance for part 95 and other commercial users, there should be no shortage of wide band repeater equipment for years to come. I'm just asking to see where your perspective is coming from. Dan KA8YPY On Feb 14, 2010, at 10:59 PM, lenaw12 wrote: > --- In Repeater-Builder@yahoogroups.com, "j.cherry377" > wrote: > > "...My question is when will the 440 and 2m bands start talking > about making a > unified 6.25 kc divisible bandplan and apply it nationwide? They > will have to do > it so might as well get started talking about it. I know that there > are a lot of > people with 25/30 kc radios that are not going to care for hearing > about this..." > > I can see a band split and reallocation of wider modes into one > portion of each ham band with the narrow/digital modes holding court > in another. > > LW > > > > > > > > > > > Yahoo! Groups Links > > >
Re: [Repeater-Builder] HAM Mototrbo Systems
The Phase 2 P25 standard is far from complete. And yes, there are several TDMA "TYPE 2" systems up and working, but none are certified "PHASE 2" P25 systems. I know in our county, the contract written with Motorola includes a statement about upgrading the system to an approved/certified Phase 2 system when the standard is complete, at no cost to the county. This not only includes infrustructure, but all of the radios as well. Now, back to the topic at had...MOTOTRBO Amateur SystemsIs everyone leaving the system setting in there respective defaults, or is there some recommendation for settings? Dan KA8YPY On Feb 14, 2010, at 9:40 PM, MCH wrote: > I think the Phase II standard is pretty much a done deal, it will be > TDMA, and there are already Phase II systems on the air. > > Joe M. > > Dan Blasberg wrote: >> P25 phase 2 is indeed supposed to be TDMA, the question is will it be >> Motorola's implementation or another? Just because Motorola comes >> out >> with a system first does not always mean it will be accepted as the >> defacto standard, as was not the case with Motorola VSLEP for their >> 1st digital implementation. >> >> Dan >> KA8YPY >> >> >> >> On Feb 14, 2010, at 5:14 PM, wrote: >> >>> >>> I am aware of the repeaters in Cal and that is awesome. The new APX >>> series radio is TDMA compliant and if past history continues to >>> prevail the TDMA phase 2 P25 will be TDMA. >>> >>> >>> Mike Mullarkey K7PFJ >>> >>> >>> >>> From: Repeater-Builder@yahoogroups.com >>> [mailto:Repeater-Builder@yahoogroups.com >>> ] On Behalf Of Gary >>> Sent: Sunday, February 14, 2010 1:38 PM >>> To: Repeater-Builder@yahoogroups.com >>> Subject: RE: [Repeater-Builder] HAM Mototrbo Systems >>> >>> >>> Here in Southern CA. (LA, Orange, and San Diego counties) we have at >>> least 4 >>> Mototrbo repeaters running AND IPSC linked on the amateur band. >>> There are >>> more than two dozen users known to have invested in Trbo radios with >>> interest growing steadily. Given the behind-the-scenes Mototrbo >>> activity >>> that has been taking place over the past two years in amateur radio >>> it's >>> become increasingly clear that the system works well and that >>> Motorola is >>> continuing to improve or release features and tools all the time. >>> They >>> really hope APCO adopts their TDMA format as the next generation of >>> P25 but >>> that is yet to be seen meanwhile Motorola is clearly focused on >>> developing >>> the Mototrbo platform. >>> Gary >>> >>> -Original Message- >>> From: Repeater-Builder@yahoogroups.com >>> [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Dan Blasberg >>> Sent: Sunday, February 14, 2010 10:12 AM >>> To: Repeater-Builder@yahoogroups.com >>> Subject: Re: [Repeater-Builder] HAM Mototrbo Systems >>> >>> Mike, >>> >>> In the DC area there is currently one UHF machine and about 5-10 >>> amateurs playing with MOTOTRBO. >>> >>> I would be interested to know what other areas are using for setting >>> or are they leaving everything in the default setting? >>> >>> Dan >>> KA8YPY >>> >>> >>> >>> >> >> >> >> >> >> >> >> Yahoo! Groups Links >> >> >> >> > > > > > > > Yahoo! Groups Links > > >
Re: [Repeater-Builder] HAM Mototrbo Systems
P25 phase 2 is indeed supposed to be TDMA, the question is will it be Motorola's implementation or another? Just because Motorola comes out with a system first does not always mean it will be accepted as the defacto standard, as was not the case with Motorola VSLEP for their 1st digital implementation. Dan KA8YPY On Feb 14, 2010, at 5:14 PM, wrote: > > > I am aware of the repeaters in Cal and that is awesome. The new APX > series radio is TDMA compliant and if past history continues to > prevail the TDMA phase 2 P25 will be TDMA. > > > Mike Mullarkey K7PFJ > > > > From: Repeater-Builder@yahoogroups.com > [mailto:Repeater-Builder@yahoogroups.com > ] On Behalf Of Gary > Sent: Sunday, February 14, 2010 1:38 PM > To: Repeater-Builder@yahoogroups.com > Subject: RE: [Repeater-Builder] HAM Mototrbo Systems > > > Here in Southern CA. (LA, Orange, and San Diego counties) we have at > least 4 > Mototrbo repeaters running AND IPSC linked on the amateur band. > There are > more than two dozen users known to have invested in Trbo radios with > interest growing steadily. Given the behind-the-scenes Mototrbo > activity > that has been taking place over the past two years in amateur radio > it's > become increasingly clear that the system works well and that > Motorola is > continuing to improve or release features and tools all the time. They > really hope APCO adopts their TDMA format as the next generation of > P25 but > that is yet to be seen meanwhile Motorola is clearly focused on > developing > the Mototrbo platform. > Gary > > -Original Message- > From: Repeater-Builder@yahoogroups.com > [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Dan Blasberg > Sent: Sunday, February 14, 2010 10:12 AM > To: Repeater-Builder@yahoogroups.com > Subject: Re: [Repeater-Builder] HAM Mototrbo Systems > > Mike, > > In the DC area there is currently one UHF machine and about 5-10 > amateurs playing with MOTOTRBO. > > I would be interested to know what other areas are using for setting > or are they leaving everything in the default setting? > > Dan > KA8YPY > > > >
Re: [Repeater-Builder] HAM Mototrbo Systems
Mike, In the DC area there is currently one UHF machine and about 5-10 amateurs playing with MOTOTRBO. I would be interested to know what other areas are using for setting or are they leaving everything in the default setting? Dan KA8YPY On Feb 14, 2010, at 10:24 AM, wrote: > > > Just curious how many ham radio club, groups and individuals are > installing HAM systems in the USA. I know that the TRBO-6 group is > up and working great and several others. Here in Denver area the > interest is huge and I am hearing of others that are also very > interested. > > Thanks, > > Mike K7PFJ > > > Mike Mullarkey K7PFJ > 6886 Sage Ave > Firestone, Co 80504 > 303-736-9693 > > >
Re: [Repeater-Builder] FRS/GMRS repeater urgently needed for Haiti
FRS is not set up to be used through a repeater. My only legal/illegal comment would be to make sure the frequencies are legal to be used in the host country and whether a license is needed or not? I am not aware of any reciprical (sp?) agreement for any GMRS/FRS frequencies between the US and any other country. Dan KA8YPY On Feb 11, 2010, at 10:27 PM, John wrote: > > Hi Everyone, > > > I'm looking for a donation of a self contained repeater for FRS/GMRS > to > be sent to the University of Miami Hospital in Haiti that has been > setup > at the airport in the capital. > Does anyone have a unit that is either powered by AC or +12volts > with a > duplexer they would like to donate to this cause. There are about 200 > doctors and nurses running around with FRS radios hanging off them > that > are being used to page each other in 4 different tratment tents and it > is hit or miss if they get thru'. A repeater would make life much > easier > for them. > Ideally I'd like one set up on Ch21 but will gladly take any unit that > is avalable. > The unit can be donated to WX4NHC, a 501 (c) 3 charity (tax- > deductable, > in most cases) and we'll get it to Haiti on the next flight. You might > get it back when things settle down but please don't count on it > We currently are operating teams of 2 hams on a wekly rotation at > HH2/WX4NHC, which is running VHF and HF comms. > > Please, no comments about legal issues, this is an emergency and the > folk in Haiti need all the help they can get at this point in time > > Thank you, > > John > > -- > John Mc Hugh, K4AG > Coordinator for Amateur Radio > National Hurricane Center, WX4NHC > Home page:- http://www.wx4nhc.org > > > > > > > > > > > Yahoo! Groups Links > > >
Re: [Repeater-Builder] DB224-JJ Wanted
And I'll take a fourth if there is such a thing... Dan KA8YPY On Jan 7, 2010, at 10:40 PM, James Adkins wrote: > > > Yes, and I'd take a third one . . . > > We are currently using a DB-573-EE for our 224.280 machine in > Springfield, MO. Andrew / Commscope doesn't make it anymore. It's > a fiberglass antenna, only meant for 217-222 with 3 dBd gain, but it > works pretty well. Our SWR at 224.280 is 1.3 to 1, almost flat on > 222.680 (input). These are good antennas if you can find one. > > On Thu, Jan 7, 2010 at 9:19 PM, Michael Ryan > wrote: > > > If there are TWO around, I’ll TAKE ONE TOO! - Mike > > > From: Repeater-Builder@yahoogroups.com > [mailto:Repeater-Builder@yahoogroups.com > ] On Behalf Of SDenny61 > Sent: Thursday, January 07, 2010 10:18 PM > To: Repeater-Builder@yahoogroups.com > Subject: [Repeater-Builder] DB224-JJ Wanted > > > > Hello everyone, happy new year! > > I'm looking for a DB224-JJ. They are becoming hard to find, even > from manufacturers. I would also consider a Hustler HD6-5 or > something similar to that. > > I'm currently using a Hustler G7-220 side mounted, which works OK, > but looking for something that could be top mounted. Having problems > getting coverage in the areas I need due to shadowing from the > tower. Any help or suggestions would be greatly appreciated! > > Steve KD8BIW > KD8BIW/R 224.580 PL 110.9 > http://www.kd8biw.com > > > > > __ Information from ESET NOD32 Antivirus, version of virus > signature database 4752 (20100107) __ > > The message was checked by ESET NOD32 Antivirus. > > http://www.eset.com > > > > > > -- > James Adkins, KB0NHX > Vice-President -- Nixa Amateur Radio Club, Inc. (KC0LUN) > www.nixahams.net > > Southern Missouri Assistant Frequency Coordinator - Missouri > Repeater Council > www.missourirepeater.org > > The Nixa Amateur Radio Club - "There is no charge for > awesomeness!" (Well, only $1.00 per month) > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) <*> To change settings via email: repeater-builder-dig...@yahoogroups.com repeater-builder-fullfeatu...@yahoogroups.com <*> To unsubscribe from this group, send an email to: repeater-builder-unsubscr...@yahoogroups.com <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] 220 repeater
So it look like the general recommendation is a converted GE or Micor. That is kind of the direction I was leaning for the group. As for conversions, what are folks using for final amps? Thanks, Dan KA8YPY > >> All right folks, >> >> For those that run a 220 repeater, what are you running as far as the >> machine itself? >> >> A local group is looking to put a 220 MHz repeater on the air and >> would like some ideas. >> >> Thanks, >> >> Dan >> KA8YPY >> >> >> > > > > > > > > Yahoo! Groups Links > > >
[Repeater-Builder] 220 repeater
All right folks, For those that run a 220 repeater, what are you running as far as the machine itself? A local group is looking to put a 220 MHz repeater on the air and would like some ideas. Thanks, Dan KA8YPY
[Repeater-Builder] Re: Antenna Pattern Question
Bill, thanks for the tip, however the repeater is a UHF. I don't see anything on Comprod's site showing a UHF with a reflector screen. I guess I will just have to improvise! I was looking to see if any other members had done such a thing before so I didn't have to re-invent the wheel so to speak. 73, Dan N8DJP Re: Antenna Pattern Question Posted by: "William Becks" wbe...@centurytel.net wgbecks Date: Fri Nov 20, 2009 7:18 pm ((PST)) Dan, The VHF fiberglass Omni's within 6 feet of your building-top antenna can cause pattern distortion just as is the case with side mounted tower installations. However, I recall from your original posting that your application requirement is to produce a deep null +/- 45 degrees with as much gain as possible elsewhere around the compass. The best candidate for this application would be a corner reflector array such as the Comprod 470-70 (Assuming VHF) that develops 30 dB Front to Back with a main horizontal beam width of 67 degrees. Check URL: http://www.comprodcom.com/en/antennas/base/pdf/471-70.pdf If the 67 degree horizontal beam width is too narrow for your intended coverage area and you can live a little less front to back ratio, then a better choice would be the Comprod F-3713 that has a flat reflector screen mounted behind the folded dipole radiator elements. Check URL: http://www.comprodcom.com/en/ecatalogs/BaseStation2005-Full.pdf You should expect to obtain nearly the same published pattern shape and gain with either of these antennas for your building-top installation provided that you are able to mount your antenna such that the fiberglass Omni's are behind the reflector and not out in front of the main beam of the array. This gives you the advantage of a large reduction in radiation (excitation) toward the Omni's that significantly reduce overall parasitic radiation from these sources with little or no net change from published pattern shape and gain. A secondary benefit is an increase in isolation from the other VHF systems that may prevent or reduce the possibility of receiver desense or transmitter IM among the three systems sharing the rooftop. Good luck with your project! Bill, WA8WG
Re: [Repeater-Builder] Re: Time for GOD
The 1st Amendment protects your free speech from the government, it's does not protect your free speech from the common man. On Nov 21, 2009, at 8:36 AM, James Adkins wrote: > > > We do still have freedom of speech and freedom of religion in this > country. Feel free to use your delete button if it "offends" you. > > On Fri, Nov 20, 2009 at 11:17 PM, Richard > wrote: > > > Well, it certainly is off topic, but you should have more of an open > mind. After all, people are entitled to their opinions, and to be > able to speak their minds. > > Richard > www.n7tgb.net > > "It does not take a majority to prevail ... but > rather an irate, tireless minority, keen on setting > brushfires of freedom in the minds of men." > --Samuel Adams > > > > > From: Repeater-Builder@yahoogroups.com > [mailto:Repeater-Builder@yahoogroups.com > ] On Behalf Of hfarrenkopf > Sent: Friday, November 20, 2009 7:55 PM > > To: Repeater-Builder@yahoogroups.com > Subject: [Repeater-Builder] Re: Time for GOD > > > What is this crap on here? Please ban the originator. > > > > Delusional stuff is not welcomed by me! > > There are no gawds BTW! > > > > > > > > > -- > James Adkins, KB0NHX > Vice-President -- Nixa Amateur Radio Club, Inc. (KC0LUN) > > Southern Missouri Frequency Coordinator - Missouri Repeater Council > www.nixahams.net > > The Nixa Amateur Radio Club - "There is no charge for > awesomeness!" (Well, only $1.00 per month) > > >
[Repeater-Builder] Re: Antenna Pattern Question
Bill, The antenna will be a building-top installation. The only thing near field is a couple of VHF fiberglas omni sticks that are over 6' away. Interaction with anything else will be insignificant. Thanks Dan N8DJP Re: Antenna Pattern Question Posted by: "William Becks" wbe...@centurytel.net wgbecks Date: Thu Nov 19, 2009 4:13 pm ((PST)) Dan, Before you make any decisions about selecting any specific antenna for your application, you need to know or specify top or side mounting. Then you'll need to consider any and all metallic objects present in the near environment of the antenna because they constitute reflective or parasitic sources that can have a profound impact on the actual far field radiation pattern obtained. I have done a lot of NEC modeling in order to make a more informed scientific estimations of how these factors modify the final radiation pattern before attempting to choose any specific antenna for a given application vs. placement and orientation about the tower. NEC modeling is only and good as the modelers ability to accurately construct a model that truly depict the real world electrical environment of the antenna. It's doubtful that you would ever get an antenna manufacturer to model, or to guarantee a particular pattern outside of those field patterns derived from their antenna test range due to the complexity of modeling and of offering such service. Cellular and other similar providers largely employ directional panel arrays are virtually free of any significant radiation in the direction of the tower, supporting structure, or other antennas in the near environment. Therefore, their engineers don't need to consider the unwanted effects of parasitic radiation sources external to the array. Unfortunately, those of us relegated to VHF and UHF systems end up illuminating a rather large area of the tower resulting in a complex number of parasitic radiation sources that change the resultant pattern that otherwise might radiate per the text books if located in free space. Bill, WA8WG
[Repeater-Builder] Antenna Pattern Question
I have a repeater that I need to have as tight a cardiod pattern as possible. I have looked at the dipole antennas such as the DB-411 and they don't really shut down the back door quite enough. Does anyone have any antenna modeling software that would show the result of adding an 18" wide screen to the back side of the mast on the DB-411? Does anyone have any experience in home-brewing a modification like this? Dan Hancock N8DJP
Re: [Repeater-Builder] Code 3 - RFI
What model where the mirror lights? If they were an older model that has an internal ballast, upgrading them to non-ballast versions clears up the RFI. Dan KA8YPY On Nov 16, 2009, at 3:03 PM, skipp025 wrote: > Re: Code 3 - RFI > > Today's amusing Code 3 RFI story comes to you courtesy > of modern LED Code 3 lighting hardware companies. > > A State Police Car arrives with missing receive audio > radio complaints. In the interest of brevity... via a lot > of searching to find the New Generation LED (Code-3) > lighting generates more than enough RFI to pretty much > disable the low band receiver. Not from the trunk mounted > controller mind you but the unwanted RF energy radiates from > the actual LED fixtures installed in each rear-view mirror. > > They're going back to "analog" (light bulbs) lighting at > the cost of global warming. I might report them to Al Gore... > but probably not anytime soon. > > :-) > > cheers, > s. > > > > > > > > Yahoo! Groups Links > > >
[Repeater-Builder] Re: Antenna question
Since no one else has mentioned them I'll say take a look at the Hustler Spirit series antennas. Built similar to Stationmasters without the "charging you for the name" price. http://www.new-tronics.com/main/html/base_spirit.html Dan N8DJP --- In Repeater-Builder@yahoogroups.com, "W3ML" wrote: > > > Now I realize that the DB type antenna is the best, but we do not have 800 > bucks to buy one. You can do FAR better than that price. Primus Electronics, Joliet, IL. 800.435.1636. I have no connection with them other than being a very satisfied customer. Laryn K8TVZ
[Repeater-Builder] Re: Tram 1481 Dual Band UHF/VHF Antenna
One other thing to check for if you take it apart. If Tram is like Diamond, it uses capacitors for RF coupling/matching along the length of the antenna. These are power limited. Two transmitters TXing at the same time can make them go and they also can pop easily if there is a surge like a nearby lightning strike. Losing these caps seems to effect the UHF far more than the VHF. Rotsa ruck. Dan N8DJP
Re: [Repeater-Builder] RAIN Report: KT1B Commentary on Green Petition to Ban Closed Repeaters
Dave, I think Murray has an issue with repeaters that have a PL but not "advertising" the pl in any of their announcements. I'm not aware of any closed repeaters in Metro DC either, but I am aware of several with PL that do not have it on the ID/Announcement. As for GMRA and PL, they have a transmit PL on the repeaters and the members can activate receive PL on their radios so as not to get any bleed over from other repeaters on the same frequencies. I too wish they would have a PL on both of their machines. Dan KA8YPY On Aug 28, 2009, at 8:27 PM, WA3GIN wrote: > > > I'm not aware of any closed repeaters in the WDC area. In the VA-Md- > DC area perhaps a half dozen noted as (c) by T-MARC. There are > dozens of repeaters in the WDC area that go unused day after day > after day with a little use in the evenings by a few hand fulls of > civil defense volunteers. There is no spectrum use issue. Perhaps as > the commentator noted, there are too many low power repeater pairs > that perhaps preclude the installation of better coverage systems. I > tend to think there are some that hog freq. pairs purely for > egocentric reasons. > > SO, where is the beef - MURRAY? Who cares if there are a few closed > repeaters? Not me. What I'd like to see is the GMRA provisioning > PL on their repeater which is just 15KHz down from ours. As trustee > I get tired of silly request from the GMRA asking us to do something > about our users who occassionaly bring up their OPEN NON PL'd > repeater ;-)) > > My subjective opinion of one...please flame direct and spare the > reflector members ;-) > > 73, > dave > wa3gin > www.w4ava.org > > > > > >
Re: [Repeater-Builder] Re: Closed Repeaters
Since when is Amateur radio use predicated on Emergency Communications? That is not the ONLY reason for Amateur Radio (well, maybe in your world). My reason for Amateur Radio is far from EmComm and Providing a service "when all else fails." Though I do support ARES and RACES, I do a lot of other things that are Amateur Radio related, to include contesting and Satellite Contacts. EMCOMM IS NOT THE ONLY REASON FOR AMATEUR RADIO. Dan KA8YPY On Jul 25, 2009, at 11:24 PM, Dave E Stephens Sr wrote: > > > sounds a bit petty to me. > > you know, the last time i checked, we were all here to provide > emergency communications when needed. not to get out there and form > clicks. i have had repeaters before and it cost me money, money i > didnt really have. > > if you alone want to put up a repeater, then you pay to do so. if > you cant afford it, then dont. why should anyone else pay for your > hobby. > > either way, just remember (and it seems that there are to many > people out there that have forgotten) we are here for one reason, > and one reason alone... to provide a service to others when all else > fail. > > Dave Stephens Sr > KF6WJA > Grants Pass Oregon > > --- On Sat, 7/25/09, Mike Besemer (WM4B) wrote: > > From: Mike Besemer (WM4B) > Subject: RE: [Repeater-Builder] Re: Closed Repeaters > To: Repeater-Builder@yahoogroups.com > Date: Saturday, July 25, 2009, 8:03 PM > > That’s not the issue here and you know it. > > > Let’s see you spend your money to finance a repeater and see how you > feel when individuals fail to respect the rules you set forth. > > > In the meantime, if you’ve got something to say, have the guts to > sign your message. > > > WM4B > > > From: Repeater-Builder@ yahoogroups. com [mailto: Repeater-Builder@ > yahoogroups. com ] On Behalf Of AA8K73 GMail > Sent: Saturday, July 25, 2009 10:56 PM > To: Repeater-Builder@ yahoogroups. com > Subject: Re: [Repeater-Builder] Re: Closed Repeaters > > > > > I can remember when no one could own an amateur radio frequency. > > Cort Buffington wrote: > > > > > > An amateur repeater STATION is exactly that -- a STATION... just > happens > > to be under automatic control. The owner of a repeater STATION is > under > > no more obligation to allow someone to use it than the owner of any > > other STATION is. I don't show up at a hams house and demand to > use his > > STATION, just because mine happens to be a repeater doesn't make > it any > > different. > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) <*> To change settings via email: mailto:repeater-builder-dig...@yahoogroups.com mailto:repeater-builder-fullfeatu...@yahoogroups.com <*> To unsubscribe from this group, send an email to: repeater-builder-unsubscr...@yahoogroups.com <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: MSF5000 Power Supply Capacitors
contact me off line Dan --- On Wed, 7/15/09, nj902 wrote: From: nj902 Subject: [Repeater-Builder] Re: MSF5000 Power Supply Capacitors To: Repeater-Builder@yahoogroups.com Received: Wednesday, July 15, 2009, 9:12 PM --- In Repeater-Builder@ yahoogroups. com, "Jared" wrote: > > Anybody got a source for the large capacitors (65000 and 12 uf) in MSF > station power supplies? - - - - - For comparison, the Motorola parts are: 2382681N01, 64000uf, $42.84 2382681N02, 12uf, $75.86
[Repeater-Builder] Six-Meter Isolator Circulator
Do you know where I can get a reasonably priced isolator or circulator for the six-meter band? I see lots of items for 2 meters, 1.25 meters, and 70 centimeters, but nothing for low band applications. Regards, Dan at K7MM, VU3MMW
[Repeater-Builder] Re: Power Supply for Repeater
--- In Repeater-Builder@yahoogroups.com, "agrimm0034" wrote: > > GMRS home brewed repeater with a 25 watt maxtrac receiving and the transmit > radio is a m1225 40 watt. The power supply on it now is around 6 amps and > will not handle the load when radio transmits. Can anyone give me a > approximate amp power supply I need. I found how to build a 10 amp power > supply but I'm still not sure that will be enough. > I would go for something in the 12-15 amp range. That way you have plenty of amps and the supply doesnt have to run at full load all the time.
[Repeater-Builder] Re: 900mhz Mastr II repeaters
--- In Repeater-Builder@yahoogroups.com, "Dan" wrote: > > I have a set of 3 MASTR II 900mhz repeaters that i am going to part out. > These were part of a trucking system. They all still have the GETC > controllers with them. Sorry but I do not have the MO. Is there anyone > interested in any of the parts from these oldies but goodies? I had planned > on using them for a 900mhz repeater but found a Motorola MSF-5000 that was a > lot easier to get into the ham bands. Drop me an email if you have any > interest and we will see what we can do. > > Dan > forgot to add that I also have the 26volt power supplies that go with these repeaters. No puny 12 volters here
[Repeater-Builder] 900mhz Mastr II repeaters
I have a set of 3 MASTR II 900mhz repeaters that i am going to part out. These were part of a trucking system. They all still have the GETC controllers with them. Sorry but I do not have the MO. Is there anyone interested in any of the parts from these oldies but goodies? I had planned on using them for a 900mhz repeater but found a Motorola MSF-5000 that was a lot easier to get into the ham bands. Drop me an email if you have any interest and we will see what we can do. Dan
Re: [Repeater-Builder] Re: Repeater Insurance?
Thanks to everyone for the responses.Specifically our club is investigating liability insurance. Thanks for the help. Dan KC2BEZ On Mon, Apr 27, 2009 at 8:42 PM, Eric Lemmon wrote: > > > Dan, > > It's not clear whether you are wanting to insure your equipment against > theft or damage, or want to insure your group against liability. Please > clearly state which you want information about. > > > 73, Eric Lemmon WB6FLY > > > -Original Message- > From: Repeater-Builder@yahoogroups.com > [mailto:Repeater-Builder@yahoogroups.com] > On Behalf Of Dan KC2BEZ > Sent: Monday, April 27, 2009 9:17 AM > To: Repeater-Builder@yahoogroups.com > Subject: Re: [Repeater-Builder] Re: Repeater Insurance? > > I see a good deal of complaining and anecdotes in this thread, but no > solutions. Does anyone have a company/agent/plan that is good? > > 73 > Dan >
Re: [Repeater-Builder] Re: Repeater Insurance?
I see a good deal of complaining and anecdotes in this thread, but no solutions. Does anyone have a company/agent/plan that is good? 73 Dan -- Dan Simmons KC2BEZ President North Country Amateur Radio Club W2LCA http://www.geocities.com/w2lca
Re: [Repeater-Builder] Re: Awfully quiet today
Verizon also offers tarriffed and non tarriffed DSL service for businesses. On Apr 5, 2009, at 11:08 AM, rahwayflynn wrote: > --- In Repeater-Builder@yahoogroups.com, Nate Duehr wrote: >> Broadband access is not on the "Regulated" side of telcos in most >> States, last I checked. No Public Utility groups involved in it. > > Verizon offers both tarrifed and non-tarrifed ISDN PRI/T1/T3 > circuits. The BPU is certainly regulating the tarrifed side of the > house. Example: Hospital and handicapped do not pay for directory > assistance (NJBPU tariff #2) > > > > > > > > > Yahoo! Groups Links > > >
[Repeater-Builder] 900MHZ MASTR II
Is there any good use for a 900MHZ MASTR II? I have one with the GETC controller attached. I have looked over all the info I can find and do not see a good way to make this thing work on the ham band. My question is, Is the repeater junk other than the PA? I have a MSF-5000 on 902 and that was a breeze. Just wondering before I start junking it out to make room in my garage for the other 4 MASTR II repeaters I picked up. They are all VHF and UHF. Thanks Dan
[Repeater-Builder] MASTR II UHS board in VHF range
Anyone have a couple of good VHF UHS boards for the MASTR II? I am completeing a couple of VHF 2 meter repeaters and would like a bit more gain. I know they are few and far between but I hope someone has some that they would like to turn into cash. Dont want to pay an arm and a leg, maybe just a few fingers. Thanks for the time. Dan/N0FPE
[Repeater-Builder] Re: Antenna suggestion question?
Try this one T.J. I've used one of their UHF antennas and they are very good quality. Specs seem to fit exactly what you are looking for. http://www.kathrein-scala.com/catalog/K5516231.pdf Dan N8DJP Antenna suggestion question? Posted by: "T.J." kc8...@yahoo.com kc8lts Date: Sat Feb 14, 2009 10:52 am ((PST)) Here is my dilemma. One of my current work radio sites is being decommissioned and torn down. My new replacement site has some antenna restrictions and I'm having trouble finding an antenna to fit the bill. The old site is 110 ft. tall and I have a DB-264 antenna set for omni pattern at 6 dbd on the top now. The new site is 225 ft. tall but will not allow dipole antennas only fiberglass collinear antennas. I normally use the Sinclair SC229 in this situation, but the site management says that is too tall and doesn't want that either. They will only allow something up to 16 feet in hieght, give or take a little. So I'm looking for something of high quality commercial grade and about maybe 3 to 4 dbd gain, around 16 ft. tall or so. I thought that there were these type antennas available as I've seen and used them before, but now I can't seem to find anyone that sells new ones. All I can find are unity gain or the big ones like I already have. Did the main antenna manufacturers stop making the in between size VHF collineer antennas? If I'm just missing it for some reason, or losing my mind, can someone point me in the right direction. Thanks
[Repeater-Builder] 220mhz repeater for sale
I have a complete 220mhz repeater for sale. It is a converted Motorola Micor running 50 watts. Also includes a 4 can set of cavities, a RC-100 controller, a Isolator on the output, and a brand new in the package 220 fiberglass antenna that I never installed. NO power supply. every thing is mounted to a homemade card that can be wheeled around for service. I absolutly will NOT ship this. Pick up only or will meet within 100 miles of Chandler AZ. Also have a copy of the manual for the controller. All you need is a site, feedline and reprogram the ID and you are on the air. Crystalled on 224.98 and coordinated in AZ. Asking $700 for the package. I can also offer a GE MASTR II 30 amp power supply for an addtional $40 I have too many repeaters sitting around here. I already have 3 on the air. I also have a Kenwood TKR-820 UHF repeater with internal duplexer and ID-8 ider. It is programmed and tuned on 446.575/PL 100hz, 12 watts out of the duplexers. I would take $500 for the 820 shipped to the lower 48 only. Respond off list to my email only n0...@cox.net Thanks for the bandwidth. dan/N0FPE
[Repeater-Builder] Re: OT- Digital TV converter box issues
As for higher end converter boxes, there are some HDTV tuner boxes - most of which are aimed at the HDTV market and have either Component Video or HDMI outputs - I know I have seen LG and Samsung models at Best Buy, and I think I also saw some from people like Sony. These are generally considered tuners and not converter boxes by their manufacturers. www.solidsignal.com has a comparison chart of features of all of the coupon eligible converter boxes (not the tuners) that makes it pretty easy to see what is out there in that class. I noticed a Zinwel and the DTVPal that both have some sort of timer for recording, with the DTVPal getting the best reviews. For a really nice box, check out the DTVPal DVR at DTVPal.com - dual tuners, built in hard drive recorder, HDMI and Component output as well as modulator and composite video out for $249. You can record two shows on different channels and watch a recorded show all at the same time. Makes fooling with a MythTV box a lot of trouble, by comparison. 73 - Dan --- In Repeater-Builder@yahoogroups.com, "Mark" wrote: > > Joe, > > Can you provide manufacturers and/or model numbers so I can research further > on these "higher-end" boxes?? > > Also, in regard to Chuck's comment about stations staying on their UHF > allocation freqs, WBBM - the CBS affiliate in Chicago - is on Ch 2 analog > and Ch 12 digital for now. WBBM will revert to Ch 3 for digital once the > migration is complete. The coverage maps obtained from the link provided > earlier does *not* indicate this future frequency change data... you need to > check the FCC for these eventualities. > > WBBM-TV IL CHICAGO USA (Digital) > > Licensee: CBS BROADCASTING INC. > Service Designation: DT Digital television station > > Channel: 3 60 - 66 MHz Licensed > File No.: BLCDT-20050623ABL Facility ID number: 9617 > CDBS Application ID No.: 1069502 > > Mark - N9WYS > > -Original Message- > From: Repeater-Builder@yahoogroups.com > [mailto:repeater-buil...@yahoogroups.com] On Behalf Of MCH > > Only some are made low cost (and coupon 'eligible'). There are a lot of > models that are not eligible for the coupon that have more features than > the basic models - such as 1080p support. I have not seen any with any > scheduling features, either, however. > > Joe M. > > From: Repeater-Builder@yahoogroups.com On Behalf Of Chuck Kelsey > > Almost all of the stations will be UHF in my area when all is said and done. > > Check your region on this map to be sure. It shows what channel the stations > > will use after cutover. > http://www.fcc.gov/dtv/markets/ > > Chuck >
[Repeater-Builder] Re: OT- Digital TV converter box issues
There is one box that has scheduling including working with VCRs and DVD recorderes that use the TV Guide directory system with an IR blaster (or will work stand alone) I have one - here is the website http://www.dtvpal.com/. You can get them on line using the coupon at http://www.solidsignal.com/cat_display.asp?main_cat=03&CAT=Digital%20Converter%20Boxes. They also have an interesting DVR that is not coupon eligible. Just got my box and have not played with it much yet. By the way, the coupon I used was given to me by a co-worker. 73 - Dan --- In Repeater-Builder@yahoogroups.com, MCH wrote: > > Only some are made low cost (and coupon 'eligible'). There are a lot of > models that are not eligible for the coupon that have more features than > the basic models - such as 1080p support. I have not seen any with any > scheduling features, either, however. > > Joe M. > > TGundo 2003 wrote: > > There is a Sony DVD Recorder/VCR with a built in ATSC tuner that can record DTV onto either DVD or VCR, but that model has been discontinued and what's in stock at Sony it whats left. I have not seen any DTV converters that can do what you ask for. Remember- Made to be the least cost to the publicThat would have added $5 > > > > Tom > > W9SRV > > > > > > --- On Thu, 1/8/09, Nate Duehr wrote: > > > >> From: Nate Duehr > >> Subject: Re: [Repeater-Builder] OT- Digital TV converter box issues > >> To: Repeater-Builder@yahoogroups.com > >> Date: Thursday, January 8, 2009, 4:07 PM > >> Here's something interesting I noticed. > >> > >> If the "consumer" (we're not people you know, > >> we're consumers now...) > >> had any type of Standard Def recording device that had its > >> own tuner... > >> > >> It could ostensibly be set permanently to "channel > >> 3" (or whatever the > >> RF output of the DTV converter box is) to handle making > >> recordings... > >> > >> But, I haven't seen any DTV tuner boxes with clocks > >> and/or scheduling > >> capabilities to tune the correct channel prior to the > >> recording device > >> starting up. > >> > >> Has anyone else seen one of those? (Other than building a > >> home-brew DVR > >> with MythBox or buying a similar commercial product...) > >> > >> Nate WY0X > >> > >> > >> > >> > >> > >> Yahoo! Groups Links > >> > >> > >> > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > >
[Repeater-Builder] motorola repeater cable problem
I have two Motorola sm50 mobiles using a repeater cable that goes between the two at the option plug in the back. I have tried every configuration two get this to work with no results. Before I condem the cable I got off ebay does anyone know of any mods or settings that need to be done to get this simplex repeater up and running. I have confirmed the radio operation itself and they are good to go.
[Repeater-Builder] Re: Helper Instruments
The SM-512 is a service monitor that covers 1 to 512 MHz if memory serves correctly. It has a built in Sinadder and Millivolt meter. The system was designed around a Bearcat scanner. When Bearcat quit making the scanner, the system was redesigned from scratch and expanded to go to 1GHz, hence the SM-1000. If you look at the boards inside the SM-512 you will be able to identify the Bearcat model from the processor board. We made a bunch of neat stuff at Helper while Bill Detwiller (the owner) was still alive. I will look to see if I still have a users manual for either of these still around. --- In Repeater-Builder@yahoogroups.com, "wb8art" wrote: > > Hi Mike, Best I can find out it is called a service monitor, hence SM > in model no.. Has Sinadder function as well as monitor RX and signal > generator and modulator, deviation, and off frequency detector meter. > > Randy > > --- In Repeater-Builder@yahoogroups.com, Mike Morris WA6ILQ > wrote: > > > > At 04:06 PM 12/22/08, you wrote: > > >Anyone have a operations manual and or service manual for a Helper > > >Instruments SM-512 > > > > > >Randy > > > > Is that a Sinadder, an RG voltmeter, or another type of equipment? > > >
[Repeater-Builder] old RC-100 manual or other info
I have a very old MCC RC-100 repeater controller board. This is one of the ones that originally was not re-programmable. The firmware was upgraded (to version 2.03) and a small EEPROM board was added to replace the original 4 DIP switches. We had set up the remote base function years ago. The remote base radio died so we did not use that feature for several years. We have just added a different remote base radio. In the process, we had to do a hard initialization to clear out the EEPROM and are starting from scratch. Everything works fine except the remote base turn off code, which our old cheat sheets show as #B. It does not work. When going into the programming mode, we use the 4 digit code to reset and re-program the Remote Base Off code and it does nothing. We have had no problem programming anything else - we have verified that all digits are decoded properly (using the pad tester function). The only manual we can find on line is for a much later firmware version (there are two versions on the Repeater Builder website) and of course the only version available from the manufacturer is the current one. Does anyone have a very old version 2. something manual that I could get a copy of? I would like to have reasonably close schematics and parts layout at the very least and we are wondering if there was a long forgotten change in the programming of that code between then and now. I have already spoken with the manufacturer about this and tried all of his suggestions without any luck. Thanks, and 73, Dan
[Repeater-Builder] Re: How to set up a basic crossband repeater system in Public Service
Bryan - what you are wanting to do is pretty much what I am setting up right now on the Ham bands. The Micro Computer Concepts RC-100 controller will do exactly what you describe. It is fairly inexpensive (less than $200 in the optional ENC-1 rack panel housing http://www.mccrpt.com/) and is not too bad to program or connect(the manual is on line for download). You would be setting up what they call a Remote Base Station along with the basic repeater. It looks like pins 11 and 12 of your connector on the repeater would get you the connections you need for the TX side of the repeater and 20 and 22 would get you the RX side. You would need all 4 of these same connections from your VHF radio. To keep the audio sounding right, you need to find out if the TX audio connection is "flat" or if it is "pre-emphasized". Flat would be preferred using the Discriminator output from the receivers, but you could make it sound OK either way by adding a simple RC network to the controller. The RC-100 lets you turn on the Remote Base to either listen only (you would be able to hear the VHF talkies) or full two way (RX and TX to the VHF talkies) using DTMF. The controller I have is an older one, but I think the current model lets you do this from either the Repeater side or the Remote Base side, if properly programmed. I am assuming that all equipment would be located at the same fixed site, if I read your post correctly. This is just another option - I have been using one of these controllers for many years without any problems and thought I'd throw it out there since I am in the process of setting up the same sort of thing. Feel free to contact me off list if you want to discuss this in more detail. 73 - Dan --- In Repeater-Builder@yahoogroups.com, "bkcarter33" <[EMAIL PROTECTED]> wrote: > > My local Community Emergency Response Team (CERT) has recently > obtained a UHF repeater (ICOM CY-F221S). > > It has two ICOM F221S radios linked together in a nice rack mount box. > > It has also been set up with a remote mic and speaker off of the > outputs on the chassis back panel. > The CERT group is licensed for the UHF repeater frequencies and they > are in the public service band. They also have a simplex VHF > frequency in the PS band (old police frequency) licensed. > > They have a number of Motorola HT radios (CP200) that operate on the > simplex VHF frequency. > > They are looking at obtaining additional UHF HT radios in the future > but would like to be able to use the equipment they have if they can > get it to work together. > > I am familiar enough with electronics to be able to follow > directions, but not enough to design anything beyond a basic switch > box. > > I am a network engineer professionally so I am pretty well versed in > those areas, and understand logic control pretty well. > > I am a technician class ham, but don't know a lot about RF as I have > not had that much experience in it. > > I would like to accomplish the following and would love to receive > some guidance from someone who has the knowledge to instruct me: > I would like to set up a cross band link for them from the UHF > repeater, to a VHF radio: > > This would allow someone on the UHF side to transmit to the repeater, > and also cross-band repeat to the VHF side. > > The VHF side would be able to transmit on the VHF simplex frequency > to the cross band side, and it would repeat onto the UHF side. > > I realize that this would NOT provide VHF to VHF repeating, and that > is okay. > > I want to provide a way that the cross band link can be enabled and > disabled by remote DTMF tones so that the bands can be separated when > desired. > > I already have an old Motorola Spectra police radio operating on the > VHF side at the site, and it has a dedicated antenna. It puts out > 110W which is way too much for what we need. > > I was thinking about getting an ICOM F121S radio, Astron power > supply, and ICS basic controller board. > > Using the existing VHF antenna, I would hook up the new ICOM (50 > watts or less). > > Now I just need to tie the ICOM repeater, controller, and new radio > together into a cross band system of sorts. > > Am I on the right track? I need some general guidance that can tell > me, try this, this, and this. Here is what equipment you could use, > and here is how you could tie it together. I have the schematics for > the repeater available to me. > > If I don't want to spend the money for a new ICOM F121S radio, then > what else could I connect easily that I can program and would be able > to get at a reasonable price. > > This is all being done as volunteer service so inexpensive is best, > but I want to avoid "cheap" equipment. > > Thanks for any help you could provide me, > > 73 > > Bryan Carter > KE7GVJ > Kaysville CERT Administration >
[Repeater-Builder] 900 Duplexer
I am trying to decide on a duplexer for a 900Mhz portable repeater made from a pair of Maxtracs. I have found several on eBay that seem suitable, but if any of the guru's on here have input I would appreciate hearing your thoughts since I'm not usre which to choose. These are the ones I'm looking at http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=250327529615&ssPageName=STRK:MEWA:IT&ih=015 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=310101567541&ssPageName=STRK:MEWA:IT&ih=021 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=250315811678&ssPageName=STRK:MEWA:IT&ih=015 Thanks and 73, Dan N8DJP
Re: [Repeater-Builder] Re: 2.4 Ghz wireless radio and 145.410 repeater
Mathew, Don't give up, look for another site if possible for the machine, if the interference issues can't be resolved..Would hate to see this happen. Hope all is well otherwise. Dan N9WNH --- On Thu, 11/20/08, n9lv <[EMAIL PROTECTED]> wrote: From: n9lv <[EMAIL PROTECTED]> Subject: [Repeater-Builder] Re: 2.4 Ghz wireless radio and 145.410 repeater To: Repeater-Builder@yahoogroups.com Date: Thursday, November 20, 2008, 9:30 PM > There was a local VHF machine up here that was getting some interference > into it. After some testing with trial and error, they moved the > wireless internet antenna and the problem went away. > Wished it was that easy. My family insist on having the internet. So goes the repeater if I can't find a solution for it. Mathew > Eric. > > n9lv wrote: > > > I just had a 2.4 Ghz internet wireless antenna mounted at the top of my > > 120' tower which is where the antenna is for the 145.410 repeater. I > > am getting intermod into the system that causes it to hang open. > > > > Anyone ever had these issues and how did you go about remeding the > > problem. And I can't shut off the internet as the family would hang > > me, and would rather not shut off the repeater. > > > > There is besides the TXRX duplexers two DB4001 filter duplexers on the > > system. Funny part is that once it starts the interference, I can > > remove antenna from the receiver and it continues to intermod until I > > kill the transmitter. I can hit the remote PTT and it will key the > > repeater, no noise into the system until I reattach the antenna port to > > the receiver. > > > > Thanks. > > > > Mathew > > > > >
[Repeater-Builder] Re: VHF Micor for sale &VHF-Low-band micor for sale for 6m band
James - I'm in Southeast Kansas about 100 miles from KC. I'm interested. Is the repeater still in a cabinet or is this just the "guts"? Feel free to contact me off the group for further discussion. Dan --- In Repeater-Builder@yahoogroups.com, "James Adkins" <[EMAIL PROTECTED]> wrote: > > I have a Motorola Micor VHF station for sale for $100.00 plus any shipping. > The station has a unified chasis backplane, and is currently tuned to > 154.430 and has both TX and RX crystals. > > The unit has a TFD6102A 192 MHz low-pass filter bolted onto the back. > > Also included is the TLD5322A exciter, the station control card needed to > interface to an external controller, a DC transfer module and a line driver > module. > > The Audio & Squelch board is a TRN6006A1 board, I could not find the model > of the receiver, but it's currently on 154.280. > > The PA is a 110w intermittent duty PA, and te unit comes with a TPN1151A > power supply. > > If you are interested, contact me off the list at [EMAIL PROTECTED] and > I can send pics, etc. I have not tested this unit, but it appears in good > shape and the person that gave it to me said he removed it from working > service. The unit is missing the shield over the exciter card, but > otherwise in tact. > > I also have a VHF-Low-band 110w mobile, perfect for use on the 6-meter band, > for sale. Comes with control head and pac rat repeater with interface > cable. $25.00 for anyone interested, plus any shipping. > > I'm in the KC metro area, so if you are in Missouri, I may be able to meet > you part way with the unit as I frequently travel throughout NW Missouri and > frequent the Springfield, MO area, too. > -- > James Adkins, KB0NHX > > "I'm James Adkins and I approve this message" > > > > -- > James Adkins, KB0NHX > > District 1 Technical Field Engineer > Troop A--Lee's Summit; Troop H--St. Joseph > Missouri State Highway Patrol > 504 SE Blue Parkway Lee's Summit, MO 64063 > 816-622-0707 ext. 235 > 417-840-5261 (Cell) > > "I'm James Adkins and I approve this message" >
[Repeater-Builder] Re: Portable Temporary Repeater
Just a couple comments on the original question of isolation. Vertical separation is much more effective than horizontal - and with a wide split you might be able to build a simple coaxial notch filter using a T and a length of coax on the receive side to help keep the transmitter out of the receiver. I remember seeing this kind of filter described in older VHF manuals. If interested in finding out more about this, let me know and I'll dig out my old copy and see if it really might be an option to help out the isolation. I've seen a couple set ups described where the transmit antenna and receive antenna were mounted base to base and the ground planes supposedly helped increase isolation - that might not work with J poles since there is no ground plane. Good luck - long term you might look for an old mobile telephone with an internal duplexer or even consider building a helical resonator for the receiver to help improve front end performance of the receiver. They aren't that hard to build and can work pretty good. 73 - Dan --- In Repeater-Builder@yahoogroups.com, "Louis" <[EMAIL PROTECTED]> wrote: > > I apologize if this has been addressed previously, or even close! Do > not have a substantial amount of time to complete this research! > > Situation: An event in a remote area, one hill top is well enough > that coverage at around 10 watts VHF for the repeater could cover most > of our Aid Stations, 2 with HT's, the other 3 with Portables at 25 > watts or so, could get into the repeater! > > In the past, we have used crossband UHF in, VHF out, and it worked ok! > Except for issues with a couple of HT's not being able to cut the > input out during transmit! My goal, is to design a lite weight, low > power consumption (i.e. fewest batteries possible, as the hill top is > only assessable by hiking or horseback! > > What I have on hand: > > Single band 2m HT for receive > Single band Yaesu 2M FT2800R for transmit @ 12.5 watts! > Pair of homebrewed 2 m aluminum j-poles > > Need to acquire: > > simple controller - NHRC-2 looks workable! > batteries - based on estimated power consumption of final configuration! > > > Basically the question is: at a 2 mhz seperation (odd split) on VHF > can one get away without using duplexers (cans), utilizing separate > rx/tx antenna's, spaced about 20 ft apart! Without desense or other > issues! > > Being such a remote area, and the nearest 2 meter repeater is well > over 50 miles away, and nowhere near these frequencies - 145.500 > rx/147.500 out using a tone of 179.9, I do not see any interference > issues there! > > Observations, suggestions, and your crazy are appreciated! > > Thank You, > > K1STX >
[Repeater-Builder] Re: UHF LINK ANTENNA QUESTION HELP NEEDED!
Is the tower yours or are you on donated space? Can you re-mount your antenna and make other changes on the tower? If so, I assume the beam is end-mounted since it's only 5 elements. Try mounting the beam through the tower instead of on the leg nearest the target repeater. Then take some sheet metal and attach it to the side of the tower the offending signal is coming from. This should sufficiently block the offending signal. Dan N8DJP 8a. UHF LINK ANTENNA QUESTION HELP NEEDED! Posted by: "n2len" [EMAIL PROTECTED] n2len Date: Sat Sep 27, 2008 10:00 pm ((PDT)) Can anyone please offer me some assistance. I am trying to link my VHF repeater to a club machine on 440 MHZ. For now I received permission to link directly on their input until the club installs a remote base and yagi next spring. There repeater is about 20 air miles away. I am using a 5 element UHF Yagi about 45 feet up a 170 Rohn 65 at my hub site! The Yagi is facing due West. The link works fantastic with 5 watts however I am receiving a 440 MHZ repeater on the same input over 100 air miles away to the South. 90 degrees off the side of the Yagi. So my question is. Any input to solve this antenna related problem to Buffer that weak signal from the south? Any move of the antenna lowering, different antenna etc... Any ideas would be greatly appreciated
[Repeater-Builder] THANKS to all
Thanks to all that helped with info on the GE 900Mhz equipment. It was most helpful. Now I just have to decide if it is worth the time to try to convert it to the amateur band or just use it for parts. I have a few MSF-5000 900mhz repeaters that are so easy to move it hardly seems worth the effort for the GE BUT I like GE stuff!! Thanks again Dan
[Repeater-Builder] HELP! 2nd try GE Mastr II 900Mhz
I have in my possesion a true 900Mhz Mastr II repeater. I was so surprized to find it I didnt look around for any manuals. Does ANYONE have information on this rare bird??? It has what looks to be a IDA controller and some kind of secondary board mounted on top of the cabinet. It is all true GE in the gold anodized cabinet, card cage, drawer unit. Anyone?? help? point me to the info, would love to get this war horse working! Dan/NØFPE
[Repeater-Builder] HELP!! 900Mhz
I have aquired a 900MHZ MastrII. Yes thats right a 900mhz MtrII. I need any and all information I can get on this thing to see if its even worth the time and effort to play with it. At this point it looks like it has a IDA controller and another outboard control or interface on top of the unit. It is all true GE. As far as the little checking I have done it looks to have NO mods. Any one out there in Mastr II land have any information or at least point me to the places to look?? I have a Motorola MSF-5000 900mhz on the air but would LOVE to make this GE work! Thanks in advance! Dan/NØFPE
[Repeater-Builder] FS or FT DB 201, GE MLS and Midland 1340B
I have a new but open boxed DB201M uncut version 144-174 Mhz for sale or trade. It comes with the DB365-OS clamps also. Also have two, 2 channel UHF GE MLS I's for sale. Comes with one hand mic,one desk mic,DC cord and one mobile bracket all in excellent condition. Also have one Midland 1340B VHF with mic,bracket and DC Cord also in excellent shape. I'm looking for some items for our small club as trades also. All items can be shipped UPS etc. Located west of Fort Wayne, Indiana. Doug Hall Voter (prefer rack mount) Doug Hall RBI-1 Motorola GM 300's VHF in good shape Motorola GR 500 cabinets, power supplies etc. Motorola R.I.C.K. type controller - prefer unit with CWID though. Older but electrically and physically good DB222E, DB224E,DB314, DB408B,DB413B or DB420B. Email me with your information or questions. Dan N9WNH
[Repeater-Builder] Need help on a Micor repeater
Hi all - just acquired a Micor Unified Chassis repeater (VHF High band) and am in the process of checking it out and trying to get tuned to 2 meters (147.78/18). So far it looks like it has a problem with the PA and it also does not look like the PA is wanting to tune down to 2 meters. It is a 100 watt Intermittent Duty PA (yeah, I know - I should have got the numbers off of it..), Looks like the repeater is about 1984 vintage from the dates I'm seeing. I have the control shelf manual but have not been able to find the RF deck manual yet. Anyone have any Micor schematics? I'll get the numbers off the deck tomorrow. This PA looks like it is off of some sort of mobile, but not a Micor (it is the original deck). Only two tuning caps in the whole deck and they max out before they peak. It was putting out 78 watts flat out on the 155 TX frequency before I started - I'm betting one of the 4 finals is dead. Anyone have any experience with something like this? I haven't started on the the receiver yet. Any help or guidance on this would be appreciated. Thanks in advance - Dan WB0SHN.
[Repeater-Builder] Repair/Modify DB Antennas
For those of you who did not receive the attachments I sent earlier, I have posted them to the "Files" section. Dan N8DJP
Re: [Repeater-Builder] P25 (mis)Information?
Nate, Nice way to demo the concept without actually putting anyone at risk. I will have to remember that when our P25 Phase 2 system goes active in 2010, yep, P25 TDMA. Dan KA8YPY On May 29, 2008, at 3:51 PM, Nate Duehr wrote: > > On May 29, 2008, at 8:11 AM, Dan Blasberg wrote: >> It has been recommended by many organizations, including APCO, that >> when on fire ground (scene), any department that has a digital system >> should revert back to an analog system for firefighter safety. It >> still boggles my mind why some department don't follow this >> recommendation to this day. (yea, I know, it's a recommendation not a >> regulation) > > > Probably they have never heard what a transmission from a firefighter > in full respiratory gear (face shield/oxygen mask) sounds like when > stuffed through the IMBE vocoder... give 'em a demo sometime. A > styrofoam cup, and your voice, and give 'em a call on their own radio > system... should be a close-enough approximation. > > If they can't copy you, they'll get your point. Make sure you're > saying something like, "I am making this test transmission that sounds > like a firefighter in full headgear." Then when they say, "What?" two > or three times, pull the cup away and say it again. > > Basic communications theory... if you take an analog signal and filter > it (mask) you lose intelligibility, then you stuff it through another > filter (vocoder) and what comes out the other side is crap. > > I love digital tech and am playing with both D-STAR and P25 in Amateur > use... and I'm also admittedly NOT a Public Safety or other > professional RF person... > > But even I can see the limitations of a lossy CODEC! (Plus I've heard > the above on the air in "real life"... and the resulting "Say again?" > three times from the Battalion Chief. Made me cringe. If they were > calling for help, that would have been a lot of time lost to get their > message through.) > > -- > Nate Duehr > [EMAIL PROTECTED] > > > > > > > > > Yahoo! Groups Links > > >
[Repeater-Builder] Re: P25 (mis)Information?
I never cease to be amazed at how the simple answer to problems like this get overlooked. Give the FD noise cancelling microphones. The less background the mic picks up the less distortion problem there is. I've been on an 800 digital sytem for about 13 years now. Our earlier purchased radios came with noise cancelling mics, that later ones didn't. OMG what a difference. Some radios are so low in TX audio that even with the console volume at full you have trouble hearing the troopers. Then you get someone who's used to the noise cancelling mics using the non cancellers and they blow you out of the console. I guess the Motherola engineers never heard of ALC or the concept of using it on the console to keep audio levels even. Dan Hancock N8DJP > Re: P25 (mis)Information? Posted by: "Steve S. Bosshard (NU5D)" [EMAIL PROTECTED] bosshardss Date: Thu May 29, 2008 9:10 am ((PDT)) On re-re-reading the post, I suspect the MA/COM salesman proposes just adding an analog trunked group to the system and calling that group talk-around. Just another group in the trunked system. Any group can be either Provoice (EDACS only) or P25 digital or Analog FM. To many folks in the land mobile business talk-around refers to simplex operation on the output frequency of a repeater station and operation independent of the repeater station. (hence my earlier post about collisions with trunked and simplex operations). From what I understand the problem with high noise environments and intelligibility is due to the characteristics of the DVSI IMBE vocoder and how this noise is treated in quantizing. Another talk group will not help in building coverage issues because the trunked system treats all groups alike unless a group by attributes is steered to one particular site in a multisite system. I am most familiar with simulcast. I believe the problems with P25 digital are exactly that and have nothing to do with brand or manufacturer. 73, Steve NU5D
Re: [Repeater-Builder] P25 (mis)Information?
Most if not all P25 radios (both portable and mobile) have the ability to do analog and digital communications from the same radio. While most can receive both analog and digital communications on the same channel if set up for mixed mode use, I am unaware of any that can transmit on both analog and digital on the same channel. All radios only have one vocoder, for P25 that is the DVSI IMBE vocoder. It is the same vocoder used by all the manufacturers and DVSI is the only producer/supplier of the vocoder. Thus any manufacturers radio set for P25 should work on any other manufacturers system since P25 is a standard. I know from personal experience that Thales/RACAL, motorola and EF Johnson radios all talk to each other when in P25 as I have several of each and enjoy playing with them. (now if I could just get this VHF Quantro up and working) So I would guess that the gentleman from M/A-COM was from marketing and not a technical person and just spewing marketing crap (no offense to those that use M/A-COM) and i would ask to talk to a technical person for any article. It has been recommended by many organizations, including APCO, that when on fire ground (scene), any department that has a digital system should revert back to an analog system for firefighter safety. It still boggles my mind why some department don't follow this recommendation to this day. (yea, I know, it's a recommendation not a regulation) Dan KA8YPY On May 29, 2008, at 9:48 AM, [EMAIL PROTECTED] wrote: > Not wanting to start a flame war, but since I know there are some > P25 gurus on here, I am posting this email exchange between an EDACS > user and their local representative. Its rather self explanatory, I > am looking for comments on the response; specifically, don't P25 > radios have an analog mode? All (constructive) comments welcome. > > > > From: MA/COM REP > To: EDACS USER > Hi, > > Thank you for the article and the opportunity to clarify a couple of > points. The system mentioned in the article is a Motorola system. > > This is just another great benefit of EDACS technology...It is able > to provide both digital AND analog features. For Fire, we plan on > programming all of their radios with an analog on-scene talk-around > group in addition to all the other talkgroups as an added feature in > the event it is preferred in those particularly noisy environments. > > There have been some cases reported like the one in Orlando with P25 > systems, since the systems only offer digital technology and does > not have the capability of using analog. All P25 vendors including > M/A-COM and Motorola are aware of the issue and are looking for ways > to improve the technology. Without getting into all of the > technical reasons, a lot of it has to do with vocoders. P25 > technology in general uses less vocoders and therefore can sometimes > "leave out" some of the audio. EDACS technology has not had a > significant number of complaints from Fire Departments as the > technology uses more vocoders. > > I am trying to find a technical explanation to send to you as well. > But in the meantime, MA/COM shouldn't pose the same problem. > > Please call me if you have any other questions. > > Sincerely, > > > - Original Message - > From: EDACS USER > To: MA/COM REP > > Subject: FW: Orlando FD Radio Article > > > > I sure hope MA/COM is working on this issue. > > > > _ > From: Concerned Citizen > To: EDACS USER > Subject: Orlando FD Radio Article > > Digital Radio Switch Upsets Firefighters > > POSTED: 8:12 am EDT May 21, 2008 > > UPDATED: 8:49 am EDT May 21, 2008 > > > ORLANDO, Fla. -- The city of Orlando replaced its police and fire > radios, but firefighters said the new multimillion-dollar system > sometimes goes silent. > > During a recent supermarket fire, firefighters were forced to use > their old radios to communicate because the new system was distorted. > > Noise was the problem. Warning bells on firefighters' air packs > cause microphone distortion on digital signals much more than with > analog channels. > > "We keep on the analog tracks so that we have the clarity that we > need. So, like I said, get the bugs worked out in the digital > system," said Fire District Chief Keith Maddox. > > The digital radio channels are also hard to hear when the > firefighters are working next to trucks because the engines have to > be revved to pump water. > > Fire departments nationwide have known about digital signal problems > for over a year, but Orlando's fire department thought tha
Re: [Repeater-Builder] Sunday at Dayton - Part Deux
Mark, No problem, they were all refurbs anyway, but seem to work well. Once I get home and can get it on the bench to get it programmed fully I will be really happy with it. Dan - KA8YPY On May 20, 2008, at 11:17 AM, n9wys wrote: > OK Dan, thanks for clearing that up for me. > > I still think $450 was a tad steep considering they came with NO > accessories... but then again, maybe I'm just a cheapskate. Or I > didn't > have the "I wants" bad enough to part with that amount of coinage. > > > Mark - N9WYS > > -Original Message- > From: Repeater-Builder@yahoogroups.com On Behalf Of Dan Blasberg > > > On May 18, 2008, at 4:52 PM, n9wys wrote: > >> Skipp, >> >> One vendor inside was selling a MTX1000 (I think?) mobile on 900.. >> Wanted >> $450, with NO accessories. I asked whether the mic on the rig was >> included; >> I was told no, it was a demo. When I asked what I was supposed to >> do for a >> mic, the answer was "eBay". I walked away. It was still sitting >> there on >> his table Saturday afternoon, so I assume he brought it home. That's >> OK - I >> really wanted an MCS2000 II or III, anyway... >> >> >> Mark - N9WYS > > Mark, > > They were XTL1500s, he had about 8-9 of them behind the table. I > found my mic in the flea market for $15. > > Just FYI. > > Dan - KA8YPY > > > > > > > Yahoo! Groups Links > > >
Re: [Repeater-Builder] Sunday at Dayton - Part Deux
On May 18, 2008, at 4:52 PM, n9wys wrote: > Skipp, > > > > One vendor inside was selling a MTX1000 (I think?) mobile on 900.. > Wanted > $450, with NO accessories. I asked whether the mic on the rig was > included; > I was told no, it was a demo. When I asked what I was supposed to > do for a > mic, the answer was "eBay". I walked away. It was still sitting > there on > his table Saturday afternoon, so I assume he brought it home. That's > OK - I > really wanted an MCS2000 II or III, anyway... > > > Mark - N9WYS Mark, They were XTL1500s, he had about 8-9 of them behind the table. I found my mic in the flea market for $15. Just FYI. Dan - KA8YPY > > > > > > > > Yahoo! Groups Links > > >
Re: [Repeater-Builder] FCC Denies Petition to Utilize 2m Sub-Band for Digit
Since in some instances D-Star is an add on board, I wonder why ICOM wouldn't do the same thing for a P25 add on board? On May 9, 2008, at 9:52 PM, Ron Wright wrote: > At $250/P25 radio is more like the D-Star price although they are > user programmable. At $2500 it would be a very very hard sell for a > Ham. Think we all know this, hi. > > I don't think ICOM has much to worry about from competetion from Mot > or any P25. > > Of course I am sure the Mot stuff is much better than the ICOM rigs > as with most other types. > > 73, ron, n9ee/r > > > Ron Wright, N9EE > > 727-376-6575 > > MICRO COMPUTER CONCEPTS > > Owner 146.64 repeater Tampa Bay, FL > > No tone, all are welcome. > > > > > > > > Depends on the manufacturer and if you want new or used. Used P25 > radios can be had for as little as $250 (you still need a programming > kit for some) and as high as $2500+ for a new handheld or mobile. > >
Re: [Repeater-Builder] FCC Denies Petition to Utilize 2m Sub-Band for Digit
On May 9, 2008, at 6:43 PM, Nate Duehr wrote: > Dan Blasberg wrote: > >> Not according to DVSI, they have several flavors of AMBE (AMBE-300, >> AMBE-2000, AMBE-2020, AMBE-20x0-HDK, AMBE-1000) and not all of them >> are AMBE+2 compatible, so AMBE is not AMBE especially when talking >> AMBE and AMBE+2. > > Oh. Yuck. The same crap as Linksys calling 6 different pieces of > hardware a "WRT54GS". Great. Exactly. > > >> If they use the same compression scheme and chipset then a dongle >> shouldn't be a problem, if they use different chipsets and schemes >> then I guess the question is how hard would it be to come with a >> Dongle for P25, since one already exists for D-Star? > > The harder part is how would you route to the P25 machine? There's > nothing (in reasonable price ranges, or that isn't > manufacturer-proprietary) to link P25 machines via IP yet. That is why I think P25 Phase 2 would be the best chance yet to play with it and perhaps develop a P25 Dongle similar to the DV dongle. > > > D-STAR has P25 soundly whipped in this regard, even if the Icom > Gateway > is "klunky"... > > And if development continues, P25 Amateur won't catch up anytime soon. P25 equipment does have the ability to work in mixed mode, including the repeaters, which I believe is the one failing of D-Star equipment, but give it time. > > > Nate WY0X Dan KA8YPY > > > > > > > Yahoo! Groups Links > > >
Re: [Repeater-Builder] FCC Denies Petition to Utilize 2m Sub-Band for Digit
On May 9, 2008, at 5:47 PM, Nate Duehr wrote: > Dan Blasberg wrote: > >> No, P25 decoder is built into the radio itself, much like the ICOM >> radios. > > Not 100% true. Raytheon JDS will hook an external P25 encoder/decoder > to your existing repeater. You ship them the repeater and $10K, and > they'll ship it back when they're done. Forgot about the Raytheon piece of kit, thanks Nate. > > >> And no one has come out with a "dongle" for P25 probably due >> to the expense of the codec from DVSI for IMBE. That may change for >> phase 2 P25 which will be using an AMBE codec from DVSI. The >> question >> is, is it the same AMBE codec used for D-Star and if so, can someone >> write the firmware into a dongle to add both P25 and D-Star to the >> same radio. If that were to happen that would be pretty kick. > > AMBE is AMBE. The framing/encapsulation of that AMBE in a P25 or D- > Star > overall bitstream is completely different, but if you can figure out > how > to copy the frames, you can extract the AMBE bits and shove them > through > DVSI's CODEC to get audio, and vice-versa. Not according to DVSI, they have several flavors of AMBE (AMBE-300, AMBE-2000, AMBE-2020, AMBE-20x0-HDK, AMBE-1000) and not all of them are AMBE+2 compatible, so AMBE is not AMBE especially when talking AMBE and AMBE+2. If they use the same compression scheme and chipset then a dongle shouldn't be a problem, if they use different chipsets and schemes then I guess the question is how hard would it be to come with a Dongle for P25, since one already exists for D-Star? > > > DVSI sells a chipset that's roughly $25 each in small quantity to > handle > the AMBE CODEC part of the job. > > Nate WY0X > > > > > > Yahoo! Groups Links > > >
Re: [Repeater-Builder] FCC Denies Petition to Utilize 2m Sub-Band for Digit
On May 9, 2008, at 1:55 PM, Ron Wright wrote: > D-Star rigs are expensive as Ham Radio rigs, but how expensive is > P25 radios??? > Depends on the manufacturer and if you want new or used. Used P25 radios can be had for as little as $250 (you still need a programming kit for some) and as high as $2500+ for a new handheld or mobile. > Can one add a P25 controller to a typical FM repeater or is it like > Icom and one must ICOM for all. > No, P25 decoder is built into the radio itself, much like the ICOM radios. And no one has come out with a "dongle" for P25 probably due to the expense of the codec from DVSI for IMBE. That may change for phase 2 P25 which will be using an AMBE codec from DVSI. The question is, is it the same AMBE codec used for D-Star and if so, can someone write the firmware into a dongle to add both P25 and D-Star to the same radio. If that were to happen that would be pretty kick. > 73, ron, n9ee/r > > Dan KA8YPY > >> From: James Delancy <[EMAIL PROTECTED]> >> Date: 2008/05/09 Fri AM 10:26:43 CDT >> To: Repeater-Builder@yahoogroups.com >> Subject: Re: [Repeater-Builder] FCC Denies Petition to Utilize 2m >> Sub-Band for Digita > >> >> Sounds like another reason why I don't care to support D-star :) P25 >> works so much better (in most cases). I also have a liking for >> MotoTrbo, but like D-Star, it is kinda proprietary since no one else >> makes radios for it oh well. >> >> James >> >> just my 2c >> >> [EMAIL PROTECTED] wrote: >>> >>> At 5/9/2008 05:47, you wrote: >>> >>>> There have been couple analog repeaters converted to D-Star here. >>> This has >>>> been the most growth. >>> >>> The problem I see is that in very case where D-Star & analog >>> systems are >>> co-located, the analog system significantly outperforms the D-Star >>> system. So most analog system owners aren't too keen on >>> downgrading their >>> system's coverage. >>> >>> Bob NO6B >>> >> >> > > > Ron Wright, N9EE > 727-376-6575 > MICRO COMPUTER CONCEPTS > Owner 146.64 repeater Tampa Bay, FL > No tone, all are welcome. > > > > > > > > Yahoo! Groups Links > > >
[Repeater-Builder] FS or FT New DB 201M Uncut 144-174 Mhz.
I have a new but open boxed DB201M uncut version 144-174 Mhz for sale or trade. It comes with the DB365-OS clamps also. I'm asking $275 as Hutton lists them at around $335 new. I'm looking for some items for our small club as trades for the DB201 also. The antenna can be shipped UPS. Located west of Fort Wayne, Indiana. Doug Hall Voter "prefer rack mount" Doug Hall RBI-1 Motorola GM 300's VHF in good shape Motorola GR 500 cabinets, power supplies etc. Motorola R.I.C.K. type controller - prefer unit with CWID though. GE MLS's VHF in good shape Older but electrically and physically good DB222E, DB224E,DB314, DB408B,DB413B or DB420B. Possibly also looking for some Motorola MSF5000 100W VHF and UHF CXB's. Email me with your information or questions. Dan N9WNH
Re: [Repeater-Builder] spectra radio dead from ebay
I would recommend replacing all of the caps and inspecting all of the traces around the caps to ensure none have failed due to a leaking cap. After that I would see what you get for error codes and if fail 01/90 remains, get you hands on another spectra (bandsplit doesn't matter) and swap the common boards one at a time (make sure you write the correct codeplug into the radio to ensure that you do not get additional error codes) and see if you have a bad MLM or other common board. KA8YPY On Apr 23, 2008, at 10:25 PM, n9wys wrote: > Here is a link to the error codes… > http://www.repeater-builder.com/motorola/spectra/spectra-error-codes.html > > FAIL 01/90 is a general failure code… Not sure what may have caused > that. However, there is a LOT of information to be had at > www.Repeater-Builder.com > … > > Good luck! > Mark – N9WYS > > From: Repeater-Builder@yahoogroups.com > [mailto:Repeater-Builder@yahoogroups.com > ] On Behalf Of Mike mike > Sent: Wednesday, April 23, 2008 6:42 PM > To: repeater-builder@yahoogroups.com > Subject: RE: [Repeater-Builder] spectra radio dead from ebay > > thanks mark it displays 01/90 code any motorola experts out there? > i need board level help if it has bad custom ics then its a waste of > time > if the rest of the caps are baad then i will replace > > To: Repeater-Builder@yahoogroups.com > From: [EMAIL PROTECTED] > Date: Tue, 22 Apr 2008 08:16:03 -0500 > Subject: RE: [Repeater-Builder] spectra radio dead from ebay > > YES... Radio will not power up without it (ignition sense wire). > > Mark – N9WYS > > -Original Message- > From: Repeater-Builder@yahoogroups.com On Behalf Of mikewm9v > spectra radio dead from ebay > want to fix this radio no display > need schematics > need to know if radio will power up without control head has front > panel pcb has power in entire unit do i need ignition sense hooked up > recapped display board and will recap other boards will sit down > with other boards and scope out radio used but not too abused have mic > also have extra wavetek 2000b monitor > 15 years as bench tech for radio shack > i did all the scanners and amateur radio equipment for them > wm9v > > > Spell a grand slam in this game where word skill meets World Series. > Get in the game. > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] spectra radio dead from ebay
On Apr 21, 2008, at 4:54 PM, mikewm9v wrote: > spectra radio dead from ebay > want to fix this radio no display > need schematics > need to know if radio will power up without control head No... > > has front panel pcb > has power in entire unit > do i need ignition sense hooked up Yes... > > recapped display board and will recap other boards > will sit down with other boards and scope out radio > used but not too abused > have mic > also have extra wavetek 2000b monitor > 15 years as bench tech for radio shack > i did all the scanners and amateur radio equipment for them > wm9v > Do you get anything out of the speaker at power up? KA8YPY > > > > > > Yahoo! Groups Links > > >
[Repeater-Builder] Re: Antenna question for the forum.
While I have not used either of those exact antennas, I have used the Hustler G7 and one of the Diamond Dual Band antennas. We had the Hustler G7 up at 190 feet on a 2 meter repeater on a Cement Plant for nearly 20 years with no problem, other than damage one time due to a lightning strike - we had to replace one of the coils and the top radiator section. The G6 is similar construction to the G7 but quite a bit smaller. The Diamond I have had experience with is quite a bit lighter and does have the protected connector, which I like, but I doubt if it would have stood up to our use at the cement plant. I'd opt for the G6. Just make sure you use dielectric grease on all the joints, make sure they are all tight, and seal it good before you put it up. On the LMR400 issue - the cost is certainly attractive and I know at least one radio dealer here using it on low power commercial and Public Safety repeaters without any problems (according to the dealer). If you already have the coax and don't mind replacing it if you have problems, You might it a try - but keep in mind that you might have to replace it if you have any problems with noise, IMD, or desense. You might get lucky. If you are only running 40 or 50 feet on 150 MHz, you aren't gaining much loss over standard RG8 style coax. 1/2" hardline would be the best choice - you might find a shop that has that much as a cut off or that has been taken out of service somewhere if you look around. 73 and good luck WB0SHN Dan --- In Repeater-Builder@yahoogroups.com, "w2sxk" <[EMAIL PROTECTED]> wrote: > > Goodafternoon, > > Me and a friend are putting up a secondary VHF repeater and have a > antenna question. Being we are on a budget but have looked at these 2 > antennas as options. > > Diamond F22A monoband base or the Husler G6-144B > > Any pros or cons to these antennas and which would you choose or you > have another option? > > Antenna will be mounted between 30-40' on multiuse rohn 45 tower fed > with LMR-400 and subjected to typical Northeast USA weather "North of > NYC". Ofcourse if money wasn't an issue, I would prompt for a more > durible antenna specifically suited for repeater use. We need to keep > antenna size down to less then 10' in length and cost down as well. > My choice was the Diamond F22A. It apears similiar in size and > construction to the X-200 dual band and I have not had any issues > with my current intallation. Any comments or suggestions??? > > > 73, > Steve - W2SXK > [EMAIL PROTECTED] >
Re: [Repeater-Builder] Outdoor Enclosure
> Thanks for all of the replies, I believe we have found one and are > working to obtain it. Dan KA8YPY > > > > > > Yahoo! Groups Links > > >
[Repeater-Builder] Outdoor Enclosure
Hi guys, Our club has been given space on top of a local office building, free of charge, the only problem is that the space is outside on a raised platform. Our club is in need of an Outdoor repeater enclosure, prefferably in the 6' range but would settle for a 3' cabinet. Other than buying brand new, I was wondering if anyone here on the reflector might have one collecting dust, that they might want to get rid of for a reasonable price. The club is located in MD, but I have no problem taking a weekend to come and get it if one is available East of the Mississippi. Thanks, Dan KA8YPY
Re: [Repeater-Builder] Re: Motorola radios on ham
Simple answer, They market and sell to commercial and government customers and their band splits (and everyone else's for that matter) reflect that. Now, can we get back to discussing repeaters please? Thanks, Dan KA8YPY On Jan 20, 2008, at 5:26 PM, MCH wrote: > I'll take a few XTSs or XTLs for a couple hundred bucks each - or even > $600 each. > > But that aside, why is a P25 radio the only one you should be able to > get to do 440-476? > > Even so, P25 is a small percentage of Motorola's entire line. > > Another point: If the radio has a bandwidth of 62 MHz, why can't I get > one to do a 36 MHz bandwidth of 440-476? Why can't I get the radio > to go > 5 kHz "out of band"? You USED to be able to do that. Why has Motorola > made their units (again, I'll say it) so ham unfriendly? > > Joe M. > > Mark wrote: >> >> With all the amateur P25 repeaters going in in the major metro areas >> why wouldn't be an option. Astro portables can be found on ebay for >> as low as $200 in a model I to six hundred for a decent model III, >> all with the correct flashcodes. >> >> Yes getting the programing equipment and CPS is a pain in the rear, >> but getting tham as ham radios isn't a problem. >> >> --- In Repeater-Builder@yahoogroups.com, MCH <[EMAIL PROTECTED]> wrote: >>> >>> Buying A$TRO radios is not an acceptable answer. As for the >> Spectras, >>> I've had no problem with a UHF Spectra going to 440 and 470. The >> only >>> thing I hate about them is the primitive CSQ channel priority. Even >> in >>> the commercial world, that is ridiculous. Try using it on a channel >> that >>> has an LTR system on it. You will never hear any other channels. >>> >>> The Maxtrac would go several MHz out of band without issue. Try >> doing >>> that with a CDM. I know of nobody who has gotten one to do 449.9875 >> and >>> 470.0125 in one radio. >>> >>> Joe M. >>> >>> [EMAIL PROTECTED] wrote: >>>> >>>> On Tue, 15 Jan 2008 14:23:58 -0500, MCH <[EMAIL PROTECTED]> wrote: >>>> >>>>> Motorola has become very ham unfriendly anymore. >>>> >>>> I would suggest becoming more friendly with Motorola's product >> line. >>>> You now have XTS and XTL radios that cover VHF as 136-174 or UHF >> as >>>> 380-470 and require no software range mods. >>>> >>>> The ASTRO Spectra line had been the worst for 440 support, or >> starting >>>> VHF R2 at 148MHz though software moded to 146-ish. That's >> definitely >>>> no longer the case with the XTL line. Very ham friendly in my >> opinion. >>> >> >> >> Yahoo! Groups Links >> >> >> > > > > > > Yahoo! Groups Links > > >
[Repeater-Builder] Re: Off Topic (but with on topic questions): NTIA propaganda
It was my undeerstanding that all digital TV would be on UHF, no VHF and that the VHF spectrum would be re-allocated. Am I in error? Dan N8DJP --- In Repeater-Builder@yahoogroups.com, MCH <[EMAIL PROTECTED]> wrote: > > Has anyone else here seen the bull put out by NTIA on > https://www.dtv2009.gov/FAQ.aspx > = > 1. What is the digital television transition? > > At midnight on February 17, 2009, all full-power television stations in > the United States will stop broadcasting in analog and switch to 100% > digital broadcasting. Digital broadcasting promises to provide a clearer > picture and more programming options and will free up airwaves for use > by emergency responders. > = > > "will free up airwaves for use by emergency responders."??? > > The TV spectrum is being freed up by ANALOG stations and the SAME > SPECTRUM will be reused by DIGITAL stations. The only spectrum being > freed up by TV for PS use is on the 764 MHz + band. (two TV channels, I > believe) and has nothing to do with a transition to digital. The same > could have been achieved by simply moving those analog stations to other > channels. > > An analog allocation is 6 MHz. A digital allocation is 6 MHz. > How is digital saving spectrum? > > As there are some broadcast types here, maybe someone can explain the > technology used where X analog stations using 6 MHz each will be more > efficient by the same number of stations using 6 MHz each. Is this that > new math they are using? > > I would like to apply the same to 2M to get more spectrum out of it. If > I take my 16 kHz analog signal and make it 16 kHz digital, will we be > able to fit more repeaters in the band? (aside from the fact most will > have no users) > > Joe M. >
Re: [Repeater-Builder] Kenwood NEXEDGE
Here are the links to both portable: http://www.kenwoodusa.com/Communications/Land_Mobile_Radio/Portables/TK-5210-5310 And mobile: http://www.kenwoodusa.com/Communications/Land_Mobile_Radio/Mobiles/TK-5710-5810 On Jan 3, 2008, at 12:28 AM, Dan Blasberg wrote: > Kenwood has been in the P25 business for five years or longer. And I > believe they are getting into the D-Star business in Japan first and > then may bring it over here. > > Dan > KA8YPY > > > On Jan 2, 2008, at 11:48 PM, Mark Thompson wrote: > >> - Forwarded Message >> From: Tom Power <[EMAIL PROTECTED]> >> To: [EMAIL PROTECTED] >> Sent: Wednesday, January 2, 2008 5:08:13 PM >> Subject: [illinoisdigitalham] Kenwood NEXEDGE >> >> Did anyone else notice Kenwood's announcement of their new NEXEDGE >> Land Mobile system?. Looks like Kenwood's version of the Motorola >> MotoTrbo system. >> >> >> http://www.kenwood.co.jp/en/news/20071221.html >> >> Nice to see Kenwood is finally playing in the IMBE technology space >> besides APCO25 (P25). Now all we need is some Kenwood original D-Star >> equipment here is the US . >> >> >> >> >> Yahoo! Groups Links >> >> >> >> >> >> >> >> Looking for last minute shopping deals? Find them fast with Yahoo! >> Search. > > > > > > > Yahoo! Groups Links > > >
Re: [Repeater-Builder] Kenwood NEXEDGE
Kenwood has been in the P25 business for five years or longer. And I believe they are getting into the D-Star business in Japan first and then may bring it over here. Dan KA8YPY On Jan 2, 2008, at 11:48 PM, Mark Thompson wrote: > - Forwarded Message > From: Tom Power <[EMAIL PROTECTED]> > To: [EMAIL PROTECTED] > Sent: Wednesday, January 2, 2008 5:08:13 PM > Subject: [illinoisdigitalham] Kenwood NEXEDGE > > Did anyone else notice Kenwood's announcement of their new NEXEDGE > Land Mobile system?. Looks like Kenwood's version of the Motorola > MotoTrbo system. > > > http://www.kenwood.co.jp/en/news/20071221.html > > Nice to see Kenwood is finally playing in the IMBE technology space > besides APCO25 (P25). Now all we need is some Kenwood original D-Star > equipment here is the US . > > > > > Yahoo! Groups Links > > > > > > > > Looking for last minute shopping deals? Find them fast with Yahoo! > Search.
Re: [Repeater-Builder] Re: "Cheap" P25 repeater ...
Al, I've got the full chasis for a VHF repeater with everything (receiver, controller, exciter, low power PA), I do not have the external Power supply, but have managed to get it powered up by applying power to the correct connector (minus the 5v on the connector). I was wondering if a VHF amp of any type would work for the high power PA? Thanks, Dan KA8YPY On Dec 31, 2007, at 4:07 AM, Albert wrote: > Needs to have the proper PA if you want it to operate properly. > Quantro PA's are different than the > Quantar PA's and are more like an MSF 5000 PA in the final stage. > Quantro's usually just have a > low power PA that is fed from the exciter. This is then fed to the > high power PA to get your final drive. > I've tried it in the past and it just doesn't work correctly. What > do you have right now for a Quantro > and what is it missing? Might have parts for you. > > Al > > > > Dan Blasberg wrote: >> >> I agree, and on that note... Does anyone know is a Quartro will work >> any external amplifier or does it need to be a motorola amp and tied >> into the Quantro? >> >> Dan >> KA8YPY >> >> >> On Dec 30, 2007, at 11:52 PM, nj902 wrote: >> >> >>> I don't see why not. >>> >>> >>> >>> Since this list is not for rules debate - let's just build some >>> digital repeaters and have some fun. >>> >>> >>> --- >>> --- In Repeater-Builder@yahoogroups.com, Dan Blasberg <[EMAIL PROTECTED]> >>> wrote: >>> >>> "Thanks for the clarification. >>> >>> "As for using VSLEP, if it is all that was available at the time the >>> radios where received, why not use it? ..." >>> >>> >>> >>> >>> >>> >>> Yahoo! Groups Links >>> >>> >>> >>> >> >> >> >> >> >> Yahoo! Groups Links >> >> >> >> >> >> >
Re: [Repeater-Builder] Re: "Cheap" P25 repeater ...
I agree, and on that note... Does anyone know is a Quartro will work any external amplifier or does it need to be a motorola amp and tied into the Quantro? Dan KA8YPY On Dec 30, 2007, at 11:52 PM, nj902 wrote: > I don't see why not. > > > > Since this list is not for rules debate - let's just build some > digital repeaters and have some fun. > > > --- > --- In Repeater-Builder@yahoogroups.com, Dan Blasberg <[EMAIL PROTECTED]> > wrote: > > "Thanks for the clarification. > > "As for using VSLEP, if it is all that was available at the time the > radios where received, why not use it? ..." > > > > > > > Yahoo! Groups Links > > >
Re: [Repeater-Builder] "Cheap" P25 repeater ...
Thanks for the clarification. As for using VSLEP, if it is all that was available at the time the radios where received, why not use it? We had several donated to use that we subsiquently found out were VSLEP and continue to use them primarily for simplex digital operations. If we need to use a repeater, we go back to a conventional channel. Although most of the folks that are purchasing radios for personal use are being directed to look for IMBE/P25 radios. Dan KA8YPY On Dec 30, 2007, at 10:39 PM, nj902 wrote: > No - not the same VOCODER. IMBE is a VOCODER. VSELP is a VOCODER - > different from and incompatible with IMBE. > > Early Motorola digital radios were sold with Motorola's Astro > proprietary digital voice format which uses the VSELP VOCODER. After > APCO released the P25 standard using the IMBE VOCODER, Motorola > offered that as well. Both were available for a period of time. > Subseqently, Motorola has discontinued their original format. > > In Motorola terms: > > Astro = 9600 BPS C4FM digital voice using the VSELP VOCODER. > Astro25 = 9600 BPS C4FM digital voice meeting the P25 standard and > using the IMBE VOCODER. > > Purchasers of used Motorola digital radios [Astro Spectra, Astro > Saber, and XTS3000] must be careful that the radio they are buying has > the features and VOCODER they want. > > Newer Motorola digital radios [marketed as Astro25 products] such as > the XTS5000 and XTL 5000 were never sold with the old Motorola VSELP > Astro format. > > As to whether Motorola Astro VSELP can be used on the ham bands - it > is simply a digital voice format with no intent to obscure content, so > it probably would be OK, but why would you want to utilize a dead > format? > > > --- > --- In Repeater-Builder@yahoogroups.com, Dan Blasberg <[EMAIL PROTECTED]> > wrote: > > "Since when isn't VSLEP allowed on the ham bands?? It is IMBE just a > different scheme using the same vocoder." > > > > > > > > > Yahoo! Groups Links > > >
Re: "Cheap" P25 repeater using mobile rigs (was: Re: [Repeater-Builder] New f...
Since when isn't VSLEP allowed on the ham bands?? It is IMBE just a different scheme using the same vocoder. Dan KA8YPY On Dec 28, 2007, at 6:42 AM, [EMAIL PROTECTED] wrote: > This is only a Quick setup. I would prefer a real P25 Digital > Repeater , But this Setup Works . You can go to Ebay and Get > Motorola Astro Sabers or a XTS-3000 And Others . But you haft to get > one that is IMBE P25 . VSLEP Is not Allowd on Ham Bands . IMBE Is > Allowd for Ham Use . And it sounds Better than DSTAR AMBE . > > > Steve efj44 > > > > See AOL's top rated recipes and easy ways to stay in shape for winter. >
Re: [Repeater-Builder] Re: MSF5000 part number decode
Thanks, When i get some time I will give it a try. Dan On Dec 19, 2007, at 2:28 PM, Jay Urish wrote: > I just used a dremel and cutting wheel to break the striplines where I > could always bridge them back with solder wick or resister legs. > > Dan Blasberg wrote: >> >> >> Jay, >> >> What did you use to remove the stripline material? >> >> Thanks, >> >> Dan >> >> On Dec 19, 2007, at 2:15 PM, Jay Urish wrote: >> >>> If you adjust the strip lines, yes it will work.. I run a low split >>> amp >>> and set it next to a mid split and just made the striplines match. >>> >>> Dan Blasberg wrote: >>>> >>>> >>>> Will a range 1 amp work for a 442 machine? I was given one for free >>>> and >>>> was wandering if >>>> it would work? >>>> >>>> Thanks, >>>> >>>> Dan >>>> KA8YPY >>>> >>>> --- In Repeater-Builder@yahoogroups.com >> <mailto:Repeater-Builder%40yahoogroups.com> >>>> <mailto:Repeater-Builder%40yahoogroups.com>, "Eric Lemmon" >>>> <[EMAIL PROTECTED]> >>>> wrote: >>>>> >>>>> Eric, >>>>> >>>>> The C44CXB7106BT model number breaks down as follows: >>>>> >>>>> C = Compa-Station >>>>> 4 = 40 watt output power >>>>> 4 = 406-512 MHz Range (but, see below) >>>>> CX = MSF Digital Capable >>>>> B = 120 VAC Primary Voltage >>>>> 7 = Programmable Squelch >>>>> 1 = 25 kHz Channel Spacing >>>>> 0 = N/A, always zero >>>>> 6 = Tone Remote Control >>>>> B = Version Code >>>>> T = Repeater Station >>>>> >>>>> The model number does not tell you what frequency range it is: >>>>> Range 1, >>>>> 403-435 MHz, or Range 2, 435-475 MHz. Look for a number stamped on >>>>> the >>>>> power amplifier; if the number is TTE1521A, the station is in >>>>> Range >>>> 1, and >>>>> if the number is TTE1522A, it is Range 2. You can also look for a >>>> number on >>>>> the RF Tray. If you see the number TUE2001A, it is Range 1, and if >>>>> it is >>>>> TUE2002A, it is Range 2. >>>>> >>>>> The Basic Service Manual for the MSF5000 is Motorola Part >>>>> 6881092E05, >>>> and is >>>>> still available from Motorola Parts for about $45. Unfortunately, >>>>> the >>>>> detailed service manual for UHF stations, 6881092E80, was recently >>>> cancelled >>>>> and is NLA. >>>>> >>>>> 73, Eric Lemmon WB6FLY >>>>> >>>>> >>>>> -Original Message- >>>>> From: Repeater-Builder@yahoogroups.com >> <mailto:Repeater-Builder%40yahoogroups.com> >>>> <mailto:Repeater-Builder%40yahoogroups.com> >>>>> [mailto:Repeater-Builder@yahoogroups.com >> <mailto:Repeater-Builder%40yahoogroups.com> >>>> <mailto:Repeater-Builder%40yahoogroups.com>] On Behalf Of Eric M. >>>>> Sent: Saturday, December 15, 2007 1:34 PM >>>>> To: Repeater-Builder@yahoogroups.com >> <mailto:Repeater-Builder%40yahoogroups.com> >>>> <mailto:Repeater-Builder%40yahoogroups.com> >>>>> Subject: [Repeater-Builder] MSF5000 part number decode >>>>> >>>>> I have a friend who has acquired and MSF5000 repeater and it is >>>>> currently programmed for low split UHF, but we are wondering what >>>>> frequency range will operate in. >>>>> >>>>> Inside on the back is what looks like a motorola part number, >>>>> which is >>>>> C44CXB7106BT, can anyone out there tell me what frequency range >>>>> this >>>>> will operate under or if this isn't the right number tell me where >>>>> I can >>>>> look on the repeater. >>>>> >>>>> Thanks, >>>>> Eric >>>>> VA3EAM >>>>> >>>> >>>> >>> >>> -- >>> Jay Urish W5GM ex. KB5VPS >>> >>> ARRL Life Member Denton County ARRL VEC >>> N5ERS VP/Trustee >>> >>> Monitoring 444.850 PL-88.5 146.92 PL-110.9 >>> >>> >>> >>> >>> >>> >>> Yahoo! Groups Links >>> >>> >>> >> >> > > -- > Jay Urish W5GMex. KB5VPS > > ARRL Life Member Denton County ARRL VEC > N5ERS VP/Trustee > > Monitoring 444.850 PL-88.5 146.92 PL-110.9 > > > > > > > Yahoo! Groups Links > > >
Re: [Repeater-Builder] Re: MSF5000 part number decode
Jay, What did you use to remove the stripline material? Thanks, Dan On Dec 19, 2007, at 2:15 PM, Jay Urish wrote: > If you adjust the strip lines, yes it will work.. I run a low split > amp > and set it next to a mid split and just made the striplines match. > > Dan Blasberg wrote: >> >> >> Will a range 1 amp work for a 442 machine? I was given one for free >> and >> was wandering if >> it would work? >> >> Thanks, >> >> Dan >> KA8YPY >> >> --- In Repeater-Builder@yahoogroups.com >> <mailto:Repeater-Builder%40yahoogroups.com>, "Eric Lemmon" >> <[EMAIL PROTECTED]> >> wrote: >>> >>> Eric, >>> >>> The C44CXB7106BT model number breaks down as follows: >>> >>> C = Compa-Station >>> 4 = 40 watt output power >>> 4 = 406-512 MHz Range (but, see below) >>> CX = MSF Digital Capable >>> B = 120 VAC Primary Voltage >>> 7 = Programmable Squelch >>> 1 = 25 kHz Channel Spacing >>> 0 = N/A, always zero >>> 6 = Tone Remote Control >>> B = Version Code >>> T = Repeater Station >>> >>> The model number does not tell you what frequency range it is: >>> Range 1, >>> 403-435 MHz, or Range 2, 435-475 MHz. Look for a number stamped on >>> the >>> power amplifier; if the number is TTE1521A, the station is in Range >> 1, and >>> if the number is TTE1522A, it is Range 2. You can also look for a >> number on >>> the RF Tray. If you see the number TUE2001A, it is Range 1, and if >>> it is >>> TUE2002A, it is Range 2. >>> >>> The Basic Service Manual for the MSF5000 is Motorola Part >>> 6881092E05, >> and is >>> still available from Motorola Parts for about $45. Unfortunately, >>> the >>> detailed service manual for UHF stations, 6881092E80, was recently >> cancelled >>> and is NLA. >>> >>> 73, Eric Lemmon WB6FLY >>> >>> >>> -Original Message- >>> From: Repeater-Builder@yahoogroups.com >> <mailto:Repeater-Builder%40yahoogroups.com> >>> [mailto:Repeater-Builder@yahoogroups.com >> <mailto:Repeater-Builder%40yahoogroups.com>] On Behalf Of Eric M. >>> Sent: Saturday, December 15, 2007 1:34 PM >>> To: Repeater-Builder@yahoogroups.com >> <mailto:Repeater-Builder%40yahoogroups.com> >>> Subject: [Repeater-Builder] MSF5000 part number decode >>> >>> I have a friend who has acquired and MSF5000 repeater and it is >>> currently programmed for low split UHF, but we are wondering what >>> frequency range will operate in. >>> >>> Inside on the back is what looks like a motorola part number, >>> which is >>> C44CXB7106BT, can anyone out there tell me what frequency range this >>> will operate under or if this isn't the right number tell me where >>> I can >>> look on the repeater. >>> >>> Thanks, >>> Eric >>> VA3EAM >>> >> >> > > -- > Jay Urish W5GMex. KB5VPS > > ARRL Life Member Denton County ARRL VEC > N5ERS VP/Trustee > > Monitoring 444.850 PL-88.5 146.92 PL-110.9 > > > > > > > Yahoo! Groups Links > > >
[Repeater-Builder] Re: MSF5000 part number decode
Will a range 1 amp work for a 442 machine? I was given one for free and was wandering if it would work? Thanks, Dan KA8YPY --- In Repeater-Builder@yahoogroups.com, "Eric Lemmon" <[EMAIL PROTECTED]> wrote: > > Eric, > > The C44CXB7106BT model number breaks down as follows: > > C = Compa-Station > 4 = 40 watt output power > 4 = 406-512 MHz Range (but, see below) > CX = MSF Digital Capable > B = 120 VAC Primary Voltage > 7 = Programmable Squelch > 1 = 25 kHz Channel Spacing > 0 = N/A, always zero > 6 = Tone Remote Control > B = Version Code > T = Repeater Station > > The model number does not tell you what frequency range it is: Range 1, > 403-435 MHz, or Range 2, 435-475 MHz. Look for a number stamped on the > power amplifier; if the number is TTE1521A, the station is in Range 1, and > if the number is TTE1522A, it is Range 2. You can also look for a number on > the RF Tray. If you see the number TUE2001A, it is Range 1, and if it is > TUE2002A, it is Range 2. > > The Basic Service Manual for the MSF5000 is Motorola Part 6881092E05, and is > still available from Motorola Parts for about $45. Unfortunately, the > detailed service manual for UHF stations, 6881092E80, was recently cancelled > and is NLA. > > 73, Eric Lemmon WB6FLY > > > -Original Message- > From: Repeater-Builder@yahoogroups.com > [mailto:[EMAIL PROTECTED] On Behalf Of Eric M. > Sent: Saturday, December 15, 2007 1:34 PM > To: Repeater-Builder@yahoogroups.com > Subject: [Repeater-Builder] MSF5000 part number decode > > I have a friend who has acquired and MSF5000 repeater and it is > currently programmed for low split UHF, but we are wondering what > frequency range will operate in. > > Inside on the back is what looks like a motorola part number, which is > C44CXB7106BT, can anyone out there tell me what frequency range this > will operate under or if this isn't the right number tell me where I can > look on the repeater. > > Thanks, > Eric > VA3EAM >
[Repeater-Builder] Radius M208 Service Manual
Does anyone on the group have a service manual for a Motorola Radius M208. We have one of these radios at our 10 meter receive site that needs repair. The repeater is down until I can locate a service manual for it. Dan, N9UWE
[Repeater-Builder] Duplexer and noise question
Hi everyone - new to the group looking for help on a strange problem. I've been involved with two repeaters in Southeast Kansas (Humboldt - 147.18 and 442.900) for over 30 years and work in Electronics, although not in radio. A couple months ago we lost both repeaters when we had a flood in this area - I took the Wacom duplexer apart and cleaned any obvious corrosion or such and assumed it would be fine - it tuned up without any trouble and there was almost no corrosion. I replaced as many of the T connectors as I could and carefully cleaned any that remained and made new cables of the correct length. I have built a new repeater but am now having a problem with intermittent buzzing sometimes when the transmitter is up - it will hold the receiver open and cover any signals that aren't pretty strong. Comes on whenever the transmitter comes up but not always - sometimes it is fine. I have tried 3 different transmitters - a Midland 3400, a Midland 340A and even a couple Icom rigs - makes no difference. Same for receivers - makes no difference. Never shows up unless the duplexer is hooked to an antenna - works fine on a dummy load. Tried two different antennas as well. The noise sounds like bad line noise, but I can't hear it except on the repeater. The repeater is at my house right now, but I intend to haul it back to the site to see if it shows up there as well when I can get time to do it. Anyone else ever ran into this kind of thing?
Re: [Repeater-Builder] Re: Making room for the new guy - repeater coordination - Hope this is not too o
No, D-Star does not automatically switch between analog and digital. You have to have one channel set up for analog and then if you want to do digital on the same frequency, you have to set up a digital channel. P25 can monitor both analog and digital in mixed mode operation but only transmit in one or the other (so you need to channels on a P25 radio as well for transmit purposes. Dan KA8YPY On Sep 20, 2007, at 10:48 AM, wb6ymh wrote: > >> Second - Dear Coordinator - Old Joe has an unused repeater pair on the >> North side of town. We respectfully request you re-consider >> coordination because we the undersigned (hand full of folks) have >> monitored this frequency for the last XX days and find little or no >> activity - well beyond the alloted 90 days allowed for repair / >> replacement, and respectfully request Old Joe's coordination be waived >> to the extent we may construct and operate a digital repeater using >> part >> of the spectrum alloted to Joe while at the same time offering to >> share >> this spectrum with Joe. (Sharing a frequency is not interference). > > Technical question: Does a DSTAR radio automatically switch between > analog and digital? i.e. can the DSTAR user hear the analog activity > when his radio is in DStar mode so he can "share" the frequency? > > Sharing between digital and analog was tried back in the packet > days... to say the least it didn't work. > > 73's Skip WB6YMH > > > > > > > Yahoo! Groups Links > > > >
Re: [Repeater-Builder] Re: Connecting Multiple TNCs
The only schematics I have seen are for connecting multiple TNC's to the serial port on a computer using diodes on the data lines. If anyone happens across a schematic (That work) for connecting multiple TNC's to a radio, I would also be interested. Dan KA8YPY On Aug 2, 2007, at 9:26 AM, Duane Hall wrote: > I remember seeing the schematics you are talking about, they were > over on www.packetradio.com. I cant find them now, but they are > probably there somewhere. > > Duane > AB8QU > > Dave Novotny wrote:Hi Eric, >> >> I'm not too worried about lots of packets perhaps >> interfering/colliding with each other. I have a couple of repeater >> sites with two controllers. I want to have remote control of each >> controller. I don't want to share the RS-232 side. I'd much rather >> share the RF side. The circuit was pretty simple. It used diodes >> on the PTT for isolation and resistors to mix the TX audio. I'm not >> sure if there was any other control or not. >> >> Dave >> --- In Repeater-Builder@yahoogroups.com, "Eric Lemmon" <[EMAIL PROTECTED]> >> wrote: >> >>> Dave, >>> >>> I'd like to see that article, too. Connecting two TNCs to one >>> >> radio is >> >>> easy, but allocating the RX and TX functions between two devices >>> >> is hardly a >> >>> trivial matter. Unless a buffer is used to store outbound data >>> >> while the >> >>> radio is busy receiving data on the other TNC, collisions will >>> >> occur >> >>> regularly. This should be interesting! Is this a good idea? >>> >>> 73, Eric Lemmon WB6FLY >>> >>> >>> -Original Message- >>> From: Repeater-Builder@yahoogroups.com >>> [mailto:[EMAIL PROTECTED] On Behalf Of >>> [EMAIL PROTECTED] >>> Sent: Wednesday, August 01, 2007 4:51 PM >>> To: repeater-builder@yahoogroups.com >>> Subject: [Repeater-Builder] Connecting Multiple TNCs >>> >>> Hi all >>> >>> Some time ago, I saw an article on how to connect two TNCs to a >>> >> single >> >>> radio. Does anyone remember such an article an either have a copy >>> >> or point >> >>> me to a site where I can download it? >>> >>> >>> >>> Thanks, >>> >>> Dave, WA6IFI >>> >>> >> >> >> >> >> >> >> Yahoo! Groups Links >> >> >> >> >> >> > >
Re: [Repeater-Builder] seperation between 2 440 antenna's
Refer to the charts here for your answer. http://www.repeater-builder.com/antenna/separation.html Dan N8DJP 3. seperation between 2 440 antenna's Posted by: "JOHN KIHL" [EMAIL PROTECTED] johnkihl Date: Mon Jul 9, 2007 6:58 am ((PDT)) Good Afternoon, We are putting up a 440 repeater antenna with over 100watts and we are looking at putting a yagi directional 440 below it. What is the rule of thumb for seperation required, 15feet of 20? Thanks 73 kb3nqs [EMAIL PROTECTED] 800-741-5152 - Get the Yahoo! toolbar and be alerted to new email wherever you're surfing.
[Repeater-Builder] Re: Chassis mount so-239 with hood?
what I need to make is a longer jumper for a mastr II mobile that I have converted to repeater service. I am doing the remove the keylock and replace thing and the current jumper is not only too short but was badly assembled. The RCA end is a mess. I had a heck of a time finding a good right angle RCA to start with and now I need to make the other end. I really dont care if it has the hood as long as I can get a good clean cable made that will fit into the hole and tighten down. Thanks for all the help guys! Dan --- In Repeater-Builder@yahoogroups.com, "Eric Lemmon" <[EMAIL PROTECTED]> wrote: > > Dan, > > Are you making up jumpers in the literal sense, or do you actually need a > bulkhead-mount UHF female on one end? If the latter, I suggest using a UHF > female bulkhead connector that crimps right to the cable. That way, you can > take full advantage of the shielding afforded by the RG-400/U cable, without > the leakage of a hood. Ideally, the jumpers in a station cabinet should be > point-to-point without any barrels, adapters, or couplings. > > However, if you really must have the hood, they are available from Mouser. > See Item "V" on this page: > > > > 73, Eric Lemmon WB6FLY > > > -Original Message- > From: Repeater-Builder@yahoogroups.com > [mailto:[EMAIL PROTECTED] On Behalf Of Dan > Sent: Sunday, June 03, 2007 5:17 PM > To: Repeater-Builder@yahoogroups.com > Subject: [Repeater-Builder] Chassis mount so-239 with hood? > > Anyone know of a source for these darn things? I want to make up some > jumpers. I have the RG-400 coax but I cant seem to find any so- 239's > with the metal hood over the back! Any ideas? > Thanks for your time! > > Dan/NØFPE >
[Repeater-Builder] Chassis mount so-239 with hood?
Anyone know of a source for these darn things? I want to make up some jumpers. I have the RG-400 coax but I cant seem to find any so-239's with the metal hood over the back! Any ideas? Thanks for your time! Dan/NØFPE
