[Repeater-Builder] Re: Inline coax connector style impedance matcher
kq7dx kq...@... wrote: Dear Group, Stop calling me Dear... people will get nervous Somewhere I saw or heard of a inline coaxial impedance matcher. It looks like a barrel connector but it actually has an adjustment on it for adjusting or trimming SWR between devices. It is placed inline with the coax ,between a driver and amp or between duplexer cavites etc, and adjusted for 50 ohms in instances where the coax length is not optimum. I thought Digikey made them but cant find it. If anyone knows about these and where to get them let me know.. 73 What the impedance matcher looks like and how it works is based on the frequency/band of operation and where it will be placed. The small or barrel type I remember were mostly made for the high end of the HF Bands. You can call the impedance matcher a number of different names like Z-Match or Antenna Tuner. The type of Z-Matcher most of the people on this group are probably thinking about was popularized by the GE Land Mobile (two-way) Radio folks, mostly for use with their repeater and base station equipment. And there is a web page with that information if you felt inclined to build something similar. http://w4zt.com/zmatch/ Companies like Telewave and TX/RX who make duplexers and cavities also sell similar matcher products. And we have seen them pop up on Ebay from time to time. s.
[Repeater-Builder] Visar DTMF question
Dear members, I have a DTMF keypad Visar radio which I would like to pre-program with a few DTMF codes (longer than 4 digits). I am trying to enable and disable air programming mode of a repeater (controlled by a ZR310 interface). Basically I would like to store the accessing code and the de-accessing code for the repeater. I had another radio (Vertex VX-800) and it could store a few DTMF codes and then automatically send them using the keypad as a shortcut ( key 1 for stored DTMF code 1 and so on ). Can I do this in Visar? With my current Visar software (R03.03.00) I do not seem to find this option, except a Phone access/de-access button and two DTMF associated codes. The thing is that these codes can be at most of 4 digits and I would need 6, so I cannot use this trick Should I try searching another software version or any other upgrade? Many thanks! Daniel Pirici Craiova, Romania
[Repeater-Builder] GE
Good morning and Happy Independence Day. I have a VHF Low band continuous duty amp that I would be willing to trade. I don't know much about it. It is marked 19D417955G3 and the card is marked 19D417968G3. It came from a Maryland State Police auction. If you are interested, please contact me off list, And if anyone has info on this amp, please let me know. Thanks Bill N4XIR
[Repeater-Builder] Re: More on GMRS - Fwd: FCC NPRM proposes complete part 95 rewrite
behavior of children young teens on FRS and unlicensed GMRS use that makes the elimination of the age requirement untenable; the need for licensing to keep voluntary coordination interference resolution possible, as well as to retain the professionalism that currently exists among licensed users, breaker breaker one nine... this is already the CB radio... Again, one fine example of the great FCC. next ham radio.
Re: [Repeater-Builder] Inline coax connector style impedance matcher
Maybe you were thinking of a Coaxial Line Stretcher? Look at: http://www.hirose.co.jp/cataloge_hp/e35500029.pdf These keep a constant impedance of 50 ohms, but allow you to adjust the length of the cable. 73, Joe, K1ike
Re: [Repeater-Builder] Inline coax connector style impedance matcher
(I'm resending this message. Somehow the wayback machine took my computer back to June 3rd.) Maybe you were thinking of a Coaxial Line Stretcher? Look at: http://www.hirose.co.jp/cataloge_hp/e35500029.pdf These keep a constant impedance of 50 ohms, but allow you to adjust the length of the cable. 73, Joe, K1ike
RE: [Repeater-Builder] GE
Bill, The 19D417955G3 power amplifier is for Mastr II stations, and is designed to cover the 36-42 MHz split with 50 watts of power. The manual that covers this particular PA is LBI-4732. Unfortunately, this LBI is not among the hundreds indexed in the GE LBI listing on Repeater-Builder. If any reader of this list has a clean and complete original paper copy of LBI-4732, and is willing to lend it to the RBTIP scanning team, please contact me directly at mycall at verizon dot net. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Bill Isom Sent: Sunday, July 04, 2010 2:32 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] GE Good morning and Happy Independence Day. I have a VHF Low band continuous duty amp that I would be willing to trade. I don't know much about it. It is marked 19D417955G3 and the card is marked 19D417968G3. It came from a Maryland State Police auction. If you are interested, please contact me off list, And if anyone has info on this amp, please let me know. Thanks Bill N4XIR
RE: [Repeater-Builder] GE continuous duty amp
Jim, That PA is rated at 35 watts, not 40. It is a versatile PA, since it covers 138-174 MHz. More info is in LBI-30423, here: www.repeater-builder.com/ge/lbi-library/lbi-30423.pdf 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jim Lange Sent: Saturday, July 03, 2010 10:09 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] GE continuous duty amp PL19D417535G1 and the REV # is blank. This came from a local organization and was in the 154.XXX range. - Original Message - From: Eric Lemmon wb6...@verizon.net mailto:wb6fly%40verizon.net To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Sunday, July 04, 2010 00:57 Subject: RE: [Repeater-Builder] GE continuous duty amp What is the model number of your surplus amplifier? 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 WA2RJP Sent: Saturday, July 03, 2010 5:39 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: [Repeater-Builder] GE continuous duty amp I have a VHF HI 40 watt continuous duty amp that is surplus to my needs. Would anyone be willing to trade for a 6 meter version? This is a working unit that was removed from a station conversion project. Yahoo! Groups Links
[Repeater-Builder] help and suggestions interference issues
DSTAR is totally foreign to me. I can't think of anyone in the immediate area that even has a DSTAR capable radio. We are experiencing some interference on the input to one of our club repeaters. What baffles me is that the repeater is in PL (123.0). Is it possible that a DSTAR user in a neighboring area is inadvertently transmitting PL and getting into our machine? Also it would GREATLY help if someone had the capability of making me a short .wav clip of what DSTAR sounds like on an analog receiver. Thanks Terry wx3m.te...@gmail.com
Re: [Repeater-Builder] help and suggestions interference issues
If it is in fact D-Star...I would think the most likely cause would be someone analog-ly crossband repeating from a D-Star frequency into your input with the needed ctcss. To my knowledge, no Icom D-Star radio allows for ctcss along with the data as it would corrupt it. It could be done with a hybrid connection between digital and an analog programmed radio however I would say it would be intentionally malicious at that point as ctcss and D-Star do not mix.. Here is a link to an MP3 of what D-Star sounds like on an analog receiver. http://www.w2sjw.com/sounds/D-STAR.mp3 Doug KD8B terry_wx3m wrote: DSTAR is totally foreign to me. I can't think of anyone in the immediate area that even has a DSTAR capable radio. We are experiencing some interference on the input to one of our club repeaters. What baffles me is that the repeater is in PL (123.0). Is it possible that a DSTAR user in a neighboring area is inadvertently transmitting PL and getting into our machine? Also it would GREATLY help if someone had the capability of making me a short .wav clip of what DSTAR sounds like on an analog receiver. Thanks Terry wx3m.te...@gmail.com mailto:wx3m.terry%40gmail.com .
Re: [Repeater-Builder] help and suggestions interference issues
Yes Doug, Sent a recording off list but you have I think hit the nail on the head as am sure CTCSS is not applicable to D-Star as you say. A strong D-Star signal would get into the RX though, despite CTCSS, I think but cannot prove it as no D-Star here. Doug - GM7SVK On 04/07/2010 17:57:16, Doug Bade (k...@thebades.net) wrote: If it is in fact D-Star...I would think the most likely cause would be someone analog-ly crossband repeating from a D-Star frequency into your input with the needed ctcss. To my knowledge, no Icom D-Star radio allows for ctcss along with the data as it would corrupt it. It could be done with a hybrid connection between digital and an analog programmed radio however I would say it would be intentionally malicious at that point as ctcss and D-Star do not mix.. Here is a link to an MP3 of what D-Star sounds like on an analog receiver. http://www.w2sjw.com/sounds/D-STAR.mp3 [link: www.w2sjw.com/sounds/D- STAR.mp3] Doug KD8B terry_wx3m wrote: DSTAR is totally foreign to me. I can't think of anyone in the immediate area that even has a DSTAR capable radio. We are experiencing some interference on the input to one of our club repeaters. What baffles me is that the repeater is in PL (123.0). Is it possible that a DSTAR user in a neighboring area is inadvertently transmitting PL and getting into our machine? Also it would GREATLY help if someone had the capability of making me a short .wav clip of what DSTAR sounds like on an analog receiver. Thanks Terry wx3m.te...@gmail.com [link: mailto:
Re: [Repeater-Builder] help and suggestions interference issues
On 7/4/2010 11:25 AM, terry_wx3m wrote: DSTAR is totally foreign to me. I can't think of anyone in the immediate area that even has a DSTAR capable radio. We are experiencing some interference on the input to one of our club repeaters. What baffles me is that the repeater is in PL (123.0). Is it possible that a DSTAR user in a neighboring area is inadvertently transmitting PL and getting into our machine? Also it would GREATLY help if someone had the capability of making me a short .wav clip of what DSTAR sounds like on an analog receiver. Thanks Terry wx3m.te...@gmail.com mailto:wx3m.terry%40gmail.com DStar doesn't use CTCSS (PL) and even if it did you would not 'hear' anything on an analog radio. If your problem really involves DStar, what /could/ happen is: 1. A DStar signal with enough energy in the 123 hz decoder to trip the radio (not too likely I think.) 2. A mix that involves a DStar radio and an analog radio running CTCSS (what I would bet on.) What makes you think a DStar radio is the interference source? -- mailto:o...@ozindfw.net Oz POB 93167 Southlake, TX 76092 (Near DFW Airport)
[Repeater-Builder] EMR 220mhz Isolator with load
I have a EMR RF Isolator for 220mhz. Model is 7450/3. 30 watt load. N connectors. Removed from my 220 system. In near perfect condition. Tunable of course. Factory tuned for 224.600 now. Now forget abt a lowball offer. I know what a new one from EMR costs. I will sell this isolator for $230 shipped OR trade for a brand new 220 base antenna. Something like a G7-220. I have no interest in a used antenna unless you have a Station master or a Celwave 4 bay for 220mhz. Or trade for a good used Motorola XPR-6550 :) thats $230 shipped. Contact me off the group. I will not discuss this here on the RB group.
Re: [Repeater-Builder] GE
According to a quick Google search it shows up as a MastrII 50 watt 36-42 MHz PA and heat sink assembly. Quoting Bill Isom bil.i...@yahoo.com: Good morning and Happy Independence Day. I have a VHF Low band continuous duty amp that I would be willing to trade. I don't know much about it. It is marked 19D417955G3 and the card is marked 19D417968G3. It came from a Maryland State Police auction. If you are interested, please contact me off list, And if anyone has info on this amp, please let me know. Thanks Bill N4XIR
[Repeater-Builder] 6 Meter Heliax Duplexers
Hi Folks, Well, they are complete, but there seems to be a problem with the transmit side 'cavities'. The variable capacitor from the center of the SO-239 to the center conductor gets extremely hot. I'm running about 70 watts out of the PA, and the devices that I used are identical to what was shown in the construction article. Just wondering if anyone else has built these, and did you see heating as well. (the first piston trimmers I used arc'd right thru)! Thanks, Tim W5FN
Re: [Repeater-Builder] 6 Meter Heliax Duplexers
Hi I take it that you have measured the vswr have you ?. Steve - Original Message - From: tahrens301 tahr...@swtexas.net To: Repeater-Builder@yahoogroups.com Sent: Sunday, July 04, 2010 11:34 PM Subject: [Repeater-Builder] 6 Meter Heliax Duplexers Hi Folks, Well, they are complete, but there seems to be a problem with the transmit side 'cavities'. The variable capacitor from the center of the SO-239 to the center conductor gets extremely hot. I'm running about 70 watts out of the PA, and the devices that I used are identical to what was shown in the construction article. Just wondering if anyone else has built these, and did you see heating as well. (the first piston trimmers I used arc'd right thru)! Thanks, Tim W5FN Yahoo! Groups Links
[Repeater-Builder] MASTR II LOW BAND TUNING
Hi Guys, Is there a link to tuning a low band mastr II? I have googled and find all kinds of VHF High and UHF but not Mastr II Low. I want to tune to six meters. Thanks JIM KA2AJH
[Repeater-Builder] Andrew 14436 Dual-yagi phasing harness
Does anyone have any technical data sheets for the phasing harness for a dual-array DB-436A (406-420 MHz) yagi from Andrew / Commscope? Looks like 14436 is the old part number. Thanks, -- 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)
Re: [Repeater-Builder] 6 Meter Heliax Duplexers
Hi Steve, According to the old MFJ, it's 1:1 at the desired frequency. The Bird gives me identical results. No reverse power. Tim
RE: [Repeater-Builder] MASTR II LOW BAND TUNING
Jim, Perhaps you are not aware that Repeater-Builder has a huge index of General Electric manuals. Just look at any Description Maintenance manual for a low-band radio to get the tuning instructions. Since you did not specify exactly which low-band radio you have, any of these LBIs will probably get you going: www.repeater-builder.com/ge/lbi-library/lbi-4896.pdf www.repeater-builder.com/ge/lbi-library/lbi-4898g.pdf www.repeater-builder.com/ge/lbi-library/lbi-30104b.pdf www.repeater-builder.com/ge/lbi-library/lbi-30293a.pdf Please be aware that even a high-split (33 range) radio may need modification to perform well in the Amateur 6m band. What is the Combination Number of the radio you want to tune? 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of James Sent: Sunday, July 04, 2010 3:46 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] MASTR II LOW BAND TUNING Hi Guys, Is there a link to tuning a low band mastr II? I have googled and find all kinds of VHF High and UHF but not Mastr II Low. I want to tune to six meters. Thanks JIM KA2AJH
RE: [Repeater-Builder] help and suggestions interference issues
Had an issue also with a dstar repeater. Seems that the repeater was co located with another analog repeater and when both transmitters came up I would see and hear the dstar signal on the input of my repeater. The two transmitters were mixing in a filter on the dstar antenna. Operators of the dstar repeater made adjustments to the filter and no longer see or hear the repeater. We are also using pl 123.0 and the dstar signal was keying the transmitter. Not sure why as the other transmitter is using a different pl tone. David From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of terry_wx3m Sent: Sunday, July 04, 2010 11:25 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] help and suggestions interference issues DSTAR is totally foreign to me. I can't think of anyone in the immediate area that even has a DSTAR capable radio. We are experiencing some interference on the input to one of our club repeaters. What baffles me is that the repeater is in PL (123.0). Is it possible that a DSTAR user in a neighboring area is inadvertently transmitting PL and getting into our machine? Also it would GREATLY help if someone had the capability of making me a short .wav clip of what DSTAR sounds like on an analog receiver. Thanks Terry wx3m.te...@gmail.com mailto:wx3m.terry%40gmail.com
[Repeater-Builder] Sinclair Tx Multicoupler model CT2_208
I have come across a TX Multicoupler Model CT2-208 frequency 148-174 mhz. The unit is equipped with one tunable hybrid, and four single isolators with terminations. Each circulator has a tuning adjustment on top. Looks like a Johannson capacitor. One isolator in each pair is marked as 118 - 174 mhz and the other 148 - 174 mhz. Is it of any use in the ham band and if so how would one go about tuning it... Neither Sinclair's site or google were any help. I think it is pretty old.. The isolators make the unit pretty heavy. Can anyone shed any light on the unit?? TIA DOUG VE5DA
[Repeater-Builder] Re: Sinclair Tx Multicoupler model CT2_208
Hi Doug, Yeah, it's probably quite usable on the ham bands... but keep in mind it's a hybrid unit, which normally assumes two fairly close spaced transmitters. You could separate the isolator/circulator parts and use them in individual applications without the hybrid... unless you need to couple two very close spaced transmitters. cheers, s. --- In Repeater-Builder@yahoogroups.com, Doug ap...@... wrote: I have come across a TX Multicoupler Model CT2-208 frequency 148-174 mhz. The unit is equipped with one tunable hybrid, and four single isolators with terminations. Each circulator has a tuning adjustment on top. Looks like a Johannson capacitor. One isolator in each pair is marked as 118 - 174 mhz and the other 148 - 174 mhz. Is it of any use in the ham band and if so how would one go about tuning it... Neither Sinclair's site or google were any help. I think it is pretty old.. The isolators make the unit pretty heavy. Can anyone shed any light on the unit?? TIA DOUG VE5DA
