[Repeater-Builder] Re: Wouxun Radio
Glen, Seems that this may be dependent on the radios manufacture date What is the production number of your Vhf/220 unit? Regards. Steve --- In Repeater-Builder@yahoogroups.com, Glenn Little WB4UIV glennmaill...@... wrote: Mine will do 5.00, 6.25, 10.00, 12.50, 25.00, 50.00 and 100.00 KHz. 73 Glenn WB4UIV At 09:35 PM 8/29/2010, you wrote: John (et all) - Is the 1.25M version capable of 20 kHz steps? The spec sheet makes it look like it can only do 12.5 or 25 kHz steps. - JimF K6IYK At 8/29/2010 06:06 PM, k7ve wrote: 3e. Re: Wouxun Radio Posted by: John D. Hays j...@... k7ve Date: Sun Aug 29, 2010 2:29 pm ((PDT)) I bought the 2m/1.25cm version from http://wouxun.us/ at Dayton this year to give me a 222 mHz handheld, it has been working great, including surviving a 3 foot drop to concrete :) --- it operates 5W on 2m and 4W on 1.25m. (I prefer dealing with a US distributor vs. an Ebay Hong Kong dealer.) -- John D. Hays Amateur Radio Station K7VE http://k7ve.org PO Box 1223 Edmonds, WA 98020-1223 VOIP/SIP: j...@... sip:j...@... mailto:j...@... James T. Fortney j...@... Yahoo! Groups Links
Re: [Repeater-Builder] ariels
How true Kev, Iam from the UK and it is spelt AERIAL. But I do know that others use ant, Ae, but it is common sense really 73 Steve - Original Message - From: Kevin Custer kug...@kuggie.com To: Repeater-Builder@yahoogroups.com Sent: Monday, August 30, 2010 4:27 PM Subject: Re: [Repeater-Builder] ariels On 8/29/2010 1:15 PM, Doug Hutchison wrote: Ariel? Antenna maybe? C'mon guys. Be careful Doug. The poster is from the United Kingdom, where they use the term Ariel, not Antenna. You know what it means, so let it go. This list is not just for Americans, as we have many members from other Countries. Kevin Custer List Owner Yahoo! Groups Links
Re: [Repeater-Builder] ariels
correct, wasn't he also a greek god ? Steve(M1SWB) UK - Original Message - From: petedcur...@gmail.com To: Repeater-Builder Sent: Monday, August 30, 2010 6:44 PM Subject: Re: [Repeater-Builder] ariels Actually the correct spelling of the UK term for Antenna is Aerial not Ariel. Ariel was the name of a now defunct UK Motorcycle maker which closed around 1967. Ex Brit. On Mon, Aug 30, 2010 at 11:27 AM, Kevin Custer kug...@kuggie.com wrote: On 8/29/2010 1:15 PM, Doug Hutchison wrote: Ariel? Antenna maybe? C'mon guys. Be careful Doug. The poster is from the United Kingdom, where they use the term Ariel, not Antenna. You know what it means, so let it go. This list is not just for Americans, as we have many members from other Countries. Kevin Custer List Owner
Re: [Repeater-Builder] ariels
What freqs, and what tx pwr ? - Original Message - From: antony antonyebu...@hotmail.com To: Repeater-Builder@yahoogroups.com Sent: Sunday, August 29, 2010 10:34 AM Subject: [Repeater-Builder] ariels using two radios as a repeator with two ariels. how far appart would the ariels be best. thanks antony Yahoo! Groups Links
Re: [Repeater-Builder] ariels
Interesting Eric, assuming he has a very tall mast, hence the use of duplexers, now UHF, a lot easier 73 Steve - Original Message - From: Eric Lemmon wb6...@verizon.net To: Repeater-Builder@yahoogroups.com Sent: Sunday, August 29, 2010 6:40 PM Subject: RE: [Repeater-Builder] ariels Antony, For a rough approximation, one must know the following information: Transmitter frequency in MHz, Transmitter power in Watts, Receiver frequency in MHz, and Receiver sensitivity in microvolts or dBm. As an example, let's assume that your repeater transmits at 147.300 MHz with 50 watts, and receives at 147.900 MHz with 0.3 microvolts of sensitivity. My CommShop software program estimates that about 89 dB of isolation between TX and RX is needed, and this isolation can be met with separate antennas 220 feet apart vertically or 21,782 feet apart horizontally. Obviously, horizontal separation of more than four miles is impractical unless a link radio is used. The vertical arrangement is assumed to be in line, with one antenna exactly above the other. Although vertical separation is practical when a tall tower is available, the use of Heliax or similar hardline with 100% shielding is mandatory. Keep in mind that programs such as CommShop make some assumptions about your radios that may be erroneous. YMMV... 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of antony Sent: Sunday, August 29, 2010 2:35 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] ariels using two radios as a repeator with two ariels. how far appart would the ariels be best. thanks antony Yahoo! Groups Links
Re: [Repeater-Builder] Polyphaser Question
This has been a great discussion. Eric, from the reading I've done it didn't seem to me that the Polyphasers were the best out there, but a European company whose initials were S + H, I think. Care to comment on the best ones, in your opinion? On Tuesday 17 August 2010 21:53:30 Eric Lemmon wrote: Mike, Perhaps the best course is to choose the unit with the highest Joule rating that meets your power level and frequency ratings. Do not buy a DC-blocked unit if you don't need that feature, because the capacitor is usually the first component to fail. Do not buy a used unit, because it was pulled from service for a reason- probably because the gas tube has reached the end of life due to multiple firings. Finally, be certain that you have a robust grounding connection from the PolyPhaser to Mother Earth; do not depend on the green wire conductor in the power cord to provide this connection. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Michael Ryan Sent: Monday, August 16, 2010 11:51 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Polyphaser Question I notice when looking at the Polyphaser website, there are a wide range of products, even a wide variety of items that on the surface appear to be suited to my particular needs. I want to put a Polyphaser on my 220 repeater. There are DC blocked and unblocked. I don't suppose it matters in that area as there is no DC going up the coax. There are freq ranges, 1.5-400 and 100 - 700 mhz, etc, etc.. Is it best to select a model that places my operating freq somewhere in the middle of the unit's operating range or does that matter as long as it IS WITHIN the range of the device someplace? I need the protected end to be an N-female and the antenna end to be and N-Male. Suggestions? - Mike -- STeve Andre' Disease Control Warden Dept. of Political Science Michigan State University A day without Windows is like a day without a nuclear incident.
Re: [Repeater-Builder] new member introduction
On Sunday 15 August 2010 02:27:17 ZephyrNYC wrote: On Sat, Aug 14, 2010 at 20:32, Nate Duehr n...@natetech.com wrote: Very little, typically. Almost all have solid-state components that would be utterly dead after an EMP. Tube gear that survives EMP better is virtually all gone. And user radios are required for any repeater to be useful, and they'd all be totally dead too. Nate, your assessment then is that all repeaters within range of an EMP would be wiped out? Having talking with some folks who were charged with calculating the effects of EMP, a rough guideline is that anything you want to survive be buried in at least 20 feet underground, and more is better. An EMP is going to seriously screw us up. I think radio communications is farther down the list of problems if we get hit by one. Food, for one is going to be hard to move around. Of course, stuff things in the ground will work, gven the effort, AND not having a second one, say a month after the first, when you've taken items out of storage and are using them. Lately I'll point out that unless a lot of folks prepare in this way, it won't much matter if you've saved some stuff, will it.. snip So... the rest of your posting sure sounds like an advertisement for another list, which is generally bad Netiquette, unless the lists had something a little bit more in common. If an EMP can wipe out all repeaters, I would say that EMP has everything to do with repeaters. snip even though your From is a pseudonym. Personally, I find pseudonym-bearers on the Internet usually need this advice: If you want to be somebody else, change you mind. Seriously. Or at least have the pseudonym match something you are, or something you do. My email address is ZephyrNYC. Zephyr is the West Wind, and was my first DJ name. NYC is for the city of my birth. I would say that matches who I am and something that I do. If all repeaters can be wiped out by an EMP, the only way I can think of to prepare for one then is to store spare repeater components inside a Faraday cage or similar container and hope that there isn't a successive EMP after the first one. 73, Frank kF2ANK Security is mostly a superstition. Avoiding danger is no safer in the long run than outright exposure. Life is either a daring adventure or nothing. ~ Helen Keller http://en.wikipedia.org/wiki/Helen_keller - Amateur Radio Portable Operations Group http://groups.yahoo.com/group/ARPortable/ - EMP (Electro-Magnetic Pulse) Preparedness http://groups.yahoo.com/group/EMPprepare/ - Great Outdoors Radio Club http://groups.yahoo.com/group/gorc/ - Ham Radio Help Group http://groups.yahoo.com/group/HamRadioHelpGroup/ - Military and Commercial Portable Radios http://groups.yahoo.com/group/milpack/ - Survival Communications http://groups.yahoo.com/group/survivalcomm/ -- STeve Andre' wb8wsf en82 Disease Control Warden Dept. of Political Science Michigan State University A day without Windows is like a day without a nuclear incident.
Re: [Repeater-Builder] Tait T800 Series II
Hi glad to help. That price is a bit high,ex demo or not, it is still secondhand and I would imagine $800-850 to be a fair price 73 Steve - Original Message - From: Ken Arck ah...@ah6le.net To: Repeater-Builder@yahoogroups.com Sent: Sunday, August 15, 2010 10:53 PM Subject: Re: [Repeater-Builder] Tait T800 Series II At 10:10 AM 8/13/2010, Steve wrote: Hi the T800,s both series one and two are great, series one uses eproms series two is an eeprom programmed using a single data line via an rj11 skt on the front and rear. In the UK a series two sells for around 400ukp a low band series one for around 200ukp. ---Thanks for the input Steve. The one I was looking at is supposedly a new demo and the guy wants $975 for it Ken -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net We don't just make 'em. We use 'em! Yahoo! Groups Links
Re: [Repeater-Builder] Tait T800 Series II
Hi the T800,s both series one and two are great, series one uses eproms series two is an eeprom programmed using a single data line via an rj11 skt on the front and rear. In the UK a series two sells for around 400ukp a low band series one for around 200ukp. 73 Steve - Original Message - From: Ken Arck ah...@ah6le.net To: Repeater-Builder@yahoogroups.com Sent: Friday, August 13, 2010 5:48 PM Subject: [Repeater-Builder] Tait T800 Series II The last time I delt with Tait equipment was their mobiles back in the early 90's. They worked well and were rugged (installed in helicopters so you know there was lots of vibration!). Anyway, consider the following: Tait T800 Series II Repeater UHF 440-480 100W Consists of: T808-10-0012 110 VAC 20A switching power supply T859-20-0005 UHF 100W power amplifier T857-26-0200 UHF Exciter, 440-480 MHz T855-20-0200 UHF Receiver, 440-480 MHz T800-22- Series II rack frame T800 Series II analog backplane T800 Series II speaker panel Any comments on the reliability, performance and OF COURSE, what's a fair price for the above? Ken -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net We don't just make 'em. We use 'em! Yahoo! Groups Links
[Repeater-Builder] Re: Mastr II drift problem
Mike, I HAVE looked at this page. I looked at it over a week ago. I put the divider network of 2 4.7K resistors to pin 13 of the exciter plug and that cured the problem. Thank you to all who suggested fixes for this problem. 73s Steve --- In Repeater-Builder@yahoogroups.com, Mike Morris wa6...@... wrote: It's on the page that I've posted the link to three times hoping that Steve would look at it. See this article http://www.repeater-builder.com/ge/m2icoms.html Read the whole thing, and look for the paragraph that starts There is one way to cheat Mike WA6ILQ At 09:38 PM 08/07/10, you wrote: modified the plug that goes in to the exciter by putting two resistors and a jumper on the plug to enable the compensate line. Gerald, AA4YQ told me about this. Could you please pass along the details of this mod, or point to a link online? Thanks... Steve sbjohns...@... http://www.wd8das.net/ Radio is your best entertainment value. Yahoo! Groups Links
[Repeater-Builder] MVP problem
Hello all, A friend gave me his MVP UHF repeater to work on. The audio squelch board was bad and I replaced it. I made what I HOPE was all the tracings and jumper connections on this board by copying the old board. The problem is that there is NO audio on the transmitter output when the squelch is opened up. I can hear squelch fine on the transmit output when I press the TEST switch on the front. The squelch control has no effect of course on the squelch while in the test position. There is an ORANGE wire that is connected to this switch on the front but is not connected-like it is broken off from the board. Does this have anything to do with the squelch? The repeater keys up fine when I open the squelch but no squelch noise is present-like it is being muted. When I press the test switch I can hear my audio on a monitor receiver fine when I transmit thru the repeater with my hand held. WHERE does this orange wire from the switch go? Is this the problem? Thanks for any help! Steve W4SEF
[Repeater-Builder] RE:Mastr II drift problem
Hello all, I think I have the problem resolved! I went to the repeater site and modified the plug that goes in to the exciter by putting two resistors and a jumper on the plug to enable the compensate line. Gerald, AA4YQ told me about this. The spare repeater I have here at home already had this mod so I just duplicated it on the one at the site. The one here at the house is very very stable. I did not realize the one at the site did not have this fix. So far it is rock steady and holding frequency! THANK YOU to all that responded with help! You folks are the best!! 73s Steve W4SEF
[Repeater-Builder] Re: MVP problem
Hi John, I am certain this wire goes to the audio squelch board that is under the front panelwhere does it hook up there?? 73s Steve --- In Repeater-Builder@yahoogroups.com, John J. Riddell ve3...@... wrote: Steve, that orange wire is Channel Guard disable. It goes to P1001, J910, then to J1001 on the Channel Guard board. 73 John VE3AMZ - Original Message - From: steve w4...@... To: Repeater-Builder@yahoogroups.com Sent: Saturday, August 07, 2010 8:08 PM Subject: [Repeater-Builder] MVP problem Hello all, A friend gave me his MVP UHF repeater to work on. The audio squelch board was bad and I replaced it. I made what I HOPE was all the tracings and jumper connections on this board by copying the old board. The problem is that there is NO audio on the transmitter output when the squelch is opened up. I can hear squelch fine on the transmit output when I press the TEST switch on the front. The squelch control has no effect of course on the squelch while in the test position. There is an ORANGE wire that is connected to this switch on the front but is not connected-like it is broken off from the board. Does this have anything to do with the squelch? The repeater keys up fine when I open the squelch but no squelch noise is present-like it is being muted. When I press the test switch I can hear my audio on a monitor receiver fine when I transmit thru the repeater with my hand held. WHERE does this orange wire from the switch go? Is this the problem? Thanks for any help! Steve W4SEF Yahoo! Groups Links
[Repeater-Builder] Re: RE:Mastr II drift problem
Hello, Does anyone have a 5C for the PLL exciter they want to sell? This is the larger Icom. Thanks Steve --- In Repeater-Builder@yahoogroups.com, Doug Bade k...@... wrote: There are 5C elements made for that exciter. you just do not have one.. From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of steve Sent: Thursday, August 05, 2010 1:01 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] RE:Mastr II drift problem I was told that I should be using 5C for receive and transmit but the 5C will NOT fit on my PLL exciter. Any ideas? Steve W4SEF
[Repeater-Builder] RE:Mastr II drift problem
I was told that I should be using 5C for receive and transmit but the 5C will NOT fit on my PLL exciter. Any ideas? Steve W4SEF
[Repeater-Builder] Re: DSP404 beta 5.18 released
Good detective work, Stan and Tim! Yes, V5.18 exists and is ready for testing. I was doing a bit more testing and finishing the documentation (at the link you found, quoted below) before I officially released it for testing. It looks you you have already tried it out, so we are ahead of the game :) Actually, we usually release in several stages: internal test, to customers with special test cases, alpha, beta and general release. We have finished the first two and I just posted a release message to the alpha-testers list at http://groups.yahoo.com/group/RLC-DSP404-alpha-testers/. If you want to get in on early testing of new versions (which are likely to have bugs), feel free to sign up there. That is also the best place to discuss problems with alpha software. If alpha testing goes well, we then announce a beta release on the main DSP404 discussion list at http://groups.yahoo.com/group/RLC-DSP404/. That list has a lot more members and we try to keep the traffic low and relevant (it is moderated). If beta testing goes well, we do a general release, which triggers an automatic update offer in RCI (the Windows management software). Steve --- In Repeater-Builder@yahoogroups.com, Tim - WD6AWP tisaw...@... wrote: I found what looks like unfinished release notes on the Wiki here: http://linkcomm.com/wiki/index.php?title=DSP4_V5.18_Changes [snip]
[Repeater-Builder] Re: Mastr II drift problem
I am using a PLL exciter with a 5C Icom. I am going to check the 10 volt supply. I have a couple of 10 volt cards that I will swap out if needed. Thank you Steve --- In Repeater-Builder@yahoogroups.com, Mike Morris wa6...@... wrote: At 03:33 PM 08/03/10, you wrote: Hello all, I have having a severe drift problem on my GE Mastr II 2 meter repeater. The transmit freq will drift nearly 2 KHZ over a 5-10 minute period. I have changed exciters and used a different ICOM but no improvement. The building that I am in is not ventilated and is very very hot. I put a high/low thermometer in and one day the high temp in the building was 114 degrees. Is this the problem? Thanks for any help. Steve W4SEF Can you elaborate on the situation? Is it an FM exciter or a phase mod exciter? Is it an EC, a 5C, or 2C Icom? Have you read http://www.repeater-builder.com/ge/m2icoms.html especially the paragraph that starts with Any voltage change on the +10vDC power supply line will change the frequency on the Icom... ?? You will also what to read the page at http://www.repeater-builder.com/tech-info/temperature-compensation.html. An idea on cooled down a building before you set the frequency... I once took a couple of cheapie box fans and setting one to blow in (at floor level) and the second stacked above it to blow out (at the top of the door level), and with a piece of cardboard in between them as an air dam. The cardboard was cut from the side of a large cardboard box that was used to ship a washing machine (ask for one at any appliance store). You could do something similar for the time period needed to set the frequency - your target is 75 to 80 degrees F for about an hour. Look at page 5 of this: http://www.repeater-builder.com/ge/lbi-library/lbi-38505a.pdf Yes, it's a receiver LBI, and you have a drifting transmitter, but the temperature notes apply. Mike WA6ILQ
[Repeater-Builder] Re: Mastr II drift problem
Hi I checked the 10 volt reg and it was a bit squirrleyI replaced it and it seemed better. But now I can not transmit my tone! I guess I have a jumper not connected. I am trying to find the drawing for the right jumper settings and connections on the 10 volt card. I have the #1 socket grounded. I read that putting a 5C element in any socket will help the stability. Any ideas? Steve --- In Repeater-Builder@yahoogroups.com, Glenn (Butch) Kanvick hotl...@... wrote: Steve. Make sure you check the jumpers, if you switch the cards. Butch, KE7FEL/r On Wed, Aug 4, 2010 at 6:11 AM, steve w4...@... wrote: I am using a PLL exciter with a 5C Icom. I am going to check the 10 volt supply. I have a couple of 10 volt cards that I will swap out if needed. Thank you Steve --- In Repeater-Builder@yahoogroups.comRepeater-Builder%40yahoogroups.com, Mike Morris wa6ilq@ wrote: At 03:33 PM 08/03/10, you wrote: Hello all, I have having a severe drift problem on my GE Mastr II 2 meter repeater. The transmit freq will drift nearly 2 KHZ over a 5-10 minute period. I have changed exciters and used a different ICOM but no improvement. The building that I am in is not ventilated and is very very hot. I put a high/low thermometer in and one day the high temp in the building was 114 degrees. Is this the problem? Thanks for any help. Steve W4SEF Can you elaborate on the situation? Is it an FM exciter or a phase mod exciter? Is it an EC, a 5C, or 2C Icom? Have you read http://www.repeater-builder.com/ge/m2icoms.html especially the paragraph that starts with Any voltage change on the +10vDC power supply line will change the frequency on the Icom... ?? You will also what to read the page at http://www.repeater-builder.com/tech-info/temperature-compensation.html . An idea on cooled down a building before you set the frequency... I once took a couple of cheapie box fans and setting one to blow in (at floor level) and the second stacked above it to blow out (at the top of the door level), and with a piece of cardboard in between them as an air dam. The cardboard was cut from the side of a large cardboard box that was used to ship a washing machine (ask for one at any appliance store). You could do something similar for the time period needed to set the frequency - your target is 75 to 80 degrees F for about an hour. Look at page 5 of this: http://www.repeater-builder.com/ge/lbi-library/lbi-38505a.pdf Yes, it's a receiver LBI, and you have a drifting transmitter, but the temperature notes apply. Mike WA6ILQ
[Repeater-Builder] Mastr II drift problem
Hello all, I have having a severe drift problem on my GE Mastr II 2 meter repeater. The transmit freq will drift nearly 2 KHZ over a 5-10 minute period. I have changed exciters and used a different ICOM but no improvement. The building that I am in is not ventilated and is very very hot. I put a high/low thermometer in and one day the high temp in the building was 114 degrees. Is this the problem? Thanks for any help. Steve W4SEF
[Repeater-Builder] Re: Mastr II drift problem
Hi Stan, Yes I sent the crystals to International. I have 3 fans running full time on the heat sink. Thanks for any help! Steve --- In Repeater-Builder@yahoogroups.com, Stanley Stanukinos ka5...@... wrote: Did you just buy the crystals and insert them in the ICOMs or did you send them in to the crystal MFG to be compensated. If you did them yourself the compensation is probably now messed up. The best way to fix it is to send them in to the crystal MFG for compensation. Stan From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of steve Sent: Tuesday, August 03, 2010 5:33 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Mastr II drift problem Hello all, I have having a severe drift problem on my GE Mastr II 2 meter repeater. The transmit freq will drift nearly 2 KHZ over a 5-10 minute period. I have changed exciters and used a different ICOM but no improvement. The building that I am in is not ventilated and is very very hot. I put a high/low thermometer in and one day the high temp in the building was 114 degrees. Is this the problem? Thanks for any help. Steve W4SEF
Re: [Repeater-Builder] Repeater transmit levels at the receiver?
Hi as do most european 6mtr repeaters, 500Kc split 73 Steve - Original Message - From: Eric Lemmon wb6...@verizon.net To: Repeater-Builder@yahoogroups.com Sent: Friday, July 30, 2010 3:57 PM Subject: RE: [Repeater-Builder] Repeater transmit levels at the receiver? Jeff, You did an excellent job of explaining the complex interrelationships among 2m repeaters. However, not all 6m repeaters have a 1 MHz split; my 6m repeater on Tranquillon Peak follows the California band plan and has a 500 kHz split. The duplexer has four cans about 12 in diameter and five feet tall. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jeff DePolo Sent: Friday, July 30, 2010 7:30 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Repeater transmit levels at the receiver? snip How many thousands of 2m repeaters are out there running 100 watts at 600 kHz offset without desense? Let's be generous and say they have 100 dB of isolation in the duplexer. +50 dBm TPO - 100 dB = -50 dBm transmit carrier hitting the receiver. No big deal. And that's on 2m. The offset on 2m is only 0.4% (0.6 MHz / 146 MHz), whereas on 6m, it's 1.9% (1 / 53 MHz), making isolation requirements that much more stringent on 2m. Now let's look at a 6m example. You have a 6m repeater on a 1 MHz split? Let's say it's on 53.99-, highest channel in the band, putting your receiver on 52.99. Some other ham is working simplex on 52.525, using 100 watts into a unity-gain antenna, and he's 40 miles away. His signal into your receiver, assuming unity gain on your end too, and line-of-sight, is -53 dBm (that's what the free-space path loss works out to: 103 dB for 40 miles on 6m, check my math). Would you expect this guy 40 miles away talking on 525 to desense your repeater? If so, then you should expect *every* ham who transmits on 525 (or potentially any other frequency within 1 MHz of your receiver) within a 40 mile radius of your repeater to cause you desense; those that are closer than 40 miles are just going to desense it even worse. snip --- Jeff WN3A Yahoo! Groups Links
Re: [Repeater-Builder] Repeater transmit levels at the receiver?
Hi Tim it should be plenty, what about the notch on,the rx side, which I assume is tuned to reject the tx freq. Steve - Original Message - From: Tim tahr...@swtexas.net To: Repeater-Builder@yahoogroups.com Sent: Friday, July 30, 2010 4:42 PM Subject: Re: [Repeater-Builder] Repeater transmit levels at the receiver? Hi Kevin, Thanks for the info. I've used the PLL MastrII exciter on a couple of systems also. Now, since this duplexer is of the 'notch' variety, I already have about 100db of notch (on the TX side) that is tuned to the RX freq. Shouldn't this be enough? Tim Yahoo! Groups Links
Re: [Repeater-Builder] Repeater transmit levels at the receiver?
Hi Tim that should work fine, very strange. As a matter of interest how far apart are the tx and rx units and I take it all the covers and screening cans are fitted.. Steve
Re: [Repeater-Builder] Repeater transmit levels at the receiver?
Hi Kev would it be feasable to use a sig gen cranked right up ? Steve - Original Message - From: Kevin Custer kug...@kuggie.com To: Repeater-Builder@yahoogroups.com Sent: Friday, July 30, 2010 5:52 PM Subject: Re: [Repeater-Builder] Repeater transmit levels at the receiver? Tim wrote: Using the Micor's exciter - about 270mW. Cannot see any spurs/noise within 80dB of the main carrier. I wonder Most of the MICOR exciters I have converted to 6M result in more than 270 mW of power - in fact, 400 to 600 mW is common. I wonder if something is amiss at the exciter, like a bad crystal or stage not peaked correctly generating noise. If you have a 6M hand-held or mobile rig capable of transmitting on your repeater output frequency, try substituting it for the MICOR and see what happens to your receiver with one of these transmitting instead. Kevin Yahoo! Groups Links
Re: [Repeater-Builder] Repeater transmit levels at the receiver?
Hi was just a thought, I use a Marconi 2015 with the synth unit and that is pretty clean, be interesting to see what Tim,s problem is Steve - Original Message - From: Kevin Custer kug...@kuggie.com To: Repeater-Builder@yahoogroups.com Sent: Friday, July 30, 2010 9:50 PM Subject: Re: [Repeater-Builder] Repeater transmit levels at the receiver? Steve wrote: Hi Kev would it be feasable to use a sig gen cranked right up ? Depends on how clean the signal generator is. I'd think it doesn't have enough smoke (output capability) to really be beneficial Many generators have a strong carrier (here we go again) adjacent from the desired carrier by few, several, many kHz/MHz. Also, depending on make/model, it may not be as clean (spurious emissions) as a tuned circuit (read MICOR exciter). I wonder how many of the -53 naysayers have or have used a Cushman CE-3? LOL! The folks that have looked at the output of one of these on a spectrum analyzer will get it. K Yahoo! Groups Links
Re: [Repeater-Builder] Re: Repeater receiver testing
Hi yes sort of, getting a bit confused my end. What I usualy do is using a sig gen on the tx port put in the tx freq, terminate the ant port at 50 ohms put my analyser on the rx port and see what level of tx freq iam getting ie -80,-90 or whatever. Steve - Original Message - From: Tim tahr...@swtexas.net To: Repeater-Builder@yahoogroups.com Sent: Monday, July 26, 2010 12:06 AM Subject: Re: [Repeater-Builder] Re: Repeater receiver testing Hi Steve, I measured each way to the common point... RX to antenna Tx to antenna, and each one had a notch of about 102dB at the opposite frequency. With the 50 watts at the antenna port is where I see the -55dBm on the receiver port. (into the spectrum analyzer). Are these the measurements you mean? (you are up late tonite!) tim Yahoo! Groups Links
Re: [Repeater-Builder] Re: Repeater receiver testing
Hi you beat me to it, I would suggest a duplexer problem as -55dB isn't a lot you should have ideally better than 80dB. It also could be the fact that you are running too much tx pwr, have you tried dropping it down. 73 Steve, M1SWB(UK) - Original Message - From: Tim tahr...@swtexas.net To: Repeater-Builder@yahoogroups.com Sent: Sunday, July 25, 2010 9:24 PM Subject: [Repeater-Builder] Re: Repeater receiver testing Hi Nj902, Well, I'm not trying to be exacting in the measurement, I'm just trying to track down a desense issue in the system. I figured I'd look at how the receiver does with the adjacent (transmitter) signal injected directly into the rx input port. The spectrum analyzer hooked up to the RX port on the duplexer shows -55dBm, which should be down sufficiently enough not to be heard by the receiver. I'm running the duplexer into a dummy load, and all interconnecting cables are double shielded. However, the desense is so severe that I am beginning to think there may be something wrong in the RX. Hence, the question. Just trying to find that silver bullet. Got any spares? Thanks, Tim Yahoo! Groups Links
Re: [Repeater-Builder] Re: Repeater receiver testing
Hi again Tim what you could try is this, put a signal gen on the tx port and see what the isolation is on the rx port, don't forget to put a dummy 50ohm load on the ant port Steve - Original Message - From: Tim tahr...@swtexas.net To: Repeater-Builder@yahoogroups.com Sent: Sunday, July 25, 2010 10:28 PM Subject: [Repeater-Builder] Re: Repeater receiver testing Hi 902, Understand about the sideband noise, but I figured at a MHz away, it probably wouldn't be an issue. Getting the same performance out of both sides of the duplexer ... about 102dB notch 1.5dB attenuation. Using RG142 for all interconnects, except from TX/RX to duplexer, and those are RG-214. Guess I could hookup a signal generator with a -50dBm signal into the RX, and measure it at the input with a high impedance probe hooked to the spectrum analyzer. Take that measurement, and then hook up the duplexer key it up. Check the measurement again see if it's the same, or more. Thanks, Tim Yahoo! Groups Links
Re: [Repeater-Builder] Re: Repeater receiver testing
Hi OH right 30w loss is not right. You maybe getting -102db notch but it is the isolation between the tx an rx ports that count, you need better than 80db. I know of some 6mtr repeaters in the UK that use the heliax duplexers and get better than -90db isolation with insertion losses a round 1.5dB. We are limited to 25w erp so usual tx in is about 25w and out of the duplexer around 20w 73 Steve - Original Message - From: Tim tahr...@swtexas.net To: Repeater-Builder@yahoogroups.com Sent: Sunday, July 25, 2010 10:23 PM Subject: Re: [Repeater-Builder] Re: Repeater receiver testing Hi Steve, Running 80 watts into the duplexer, getting 50 out. Getting about 102dB notch out of the duplexers. From a previous thread a couple of days ago, the consensus was that -50 was fine for this receiver. I hooked up my IC-706 to the TX port, and even at 5w, I was getting significant desense. Figured I'd try take one variable on at a time... RX first. The RX was given to me, already crystalled 'tuned' up... it was a voting receiver at a multi-site repeater. Not sure if had any 'special' modifications done to it! Thanks, Tim Yahoo! Groups Links
Re: [Repeater-Builder] Re: Repeater receiver testing
Hi Jeff yes I know -55db is I think around 399 microvolts which will flatten any receiver, he needs to know the actual isolation between the tx and rx ports. I assume that the notch figure Tim mentions is the actual notch of each filter, which is why in my later mail I suggested doing an isolation test with sig gen and analyser 73 Steve - Original Message - From: Jeff DePolo j...@broadsci.com To: Repeater-Builder@yahoogroups.com Sent: Sunday, July 25, 2010 11:43 PM Subject: RE: [Repeater-Builder] Re: Repeater receiver testing Hi you beat me to it, I would suggest a duplexer problem as -55dB isn't a lot you should have ideally better than 80dB. It also could be the fact that you are running too much tx pwr, have you tried dropping it down. 73 Steve, M1SWB(UK) He said he measured the Tx carrier at the Rx port of the duplexer at -55 dBm; he didn't say he had 55 dB of isolation... Yahoo! Groups Links
Re: [Repeater-Builder] Tait help
Hi join the Tait group the diagrams are there, it isn't just a cable the 800 series 2 lead has an inerface as well, the series 1,s use eproms Steve - Original Message - From: James Delancy ctra...@gmail.com To: l...@yahoogroups.com; Repeater-Builder@yahoogroups.com Sent: Tuesday, July 20, 2010 1:51 PM Subject: [Repeater-Builder] Tait help I have some Tait digital base stations as well as the other older analog only counterparts (800 series?) that I need to build programming cables for. Does anyone up here have any of the diagrams or schematics for the cables? Thanks! James Delancy Yahoo! Groups Links
Re: [Repeater-Builder] Controller recommendations
Thanks for everyone's input. Controller choice seems to be like a religion. Everybody has their favourite and are reluctant to try another brand. The 3x4 vs 4x4 is a big one for me. I think the only radio I own with a 4x4 keypad is an old 03AT. At the remote site, I would have telnet access or serial access from the public internet and software access from within the private wan. At this point I think I'll read over a few manuals and contact a couple of vendors. Right now the biggest problem is to keep the internal repeat function of the repeater enabled while still allowing the controller to manage the remote link. I think it's doable and will just require the right controller and a bit of playing. Once again, thanks. -- Steve steve.jones at rogers.com
Re: [Repeater-Builder] Controller recommendations
On Jul 18, 2010, at11:21 AM, n...@no6b.com wrote: the FF Systems unit might actually be the best choice because IIRC it tries to mimic the ACC programming paradigm. It's been years since I had to program anything on the ACC controllers so that won't be a problem. From the looks of it, controller firmware is leaps and bounds ahead of the ACC products so I'll have some reading to do anyways. -- Steve steve.jones at rogers.com
[Repeater-Builder] Controller recommendations
Hello all. I'm looking at replacing an MSR2000 and homebuilt controller with a Quantar and commercially built controller. Last controller I played with was an RC96 so it's been a while. The repeater setup is pretty simple. VHF MSR2000 with a simple courtesy beep and CW id'er. Two 5 DTMF digit commands allow us to turn the repeater on and off. The controller acknowledges the commands with a simple CW R. There's a UHF link (MCX100) down to a hub repeater which allows linking to other repeaters. The VHF repeater can be linked from the local side or the UHF link side. Two 3 digit commands allow us to turn the link on or off. The link has a 5 minute inactivity timer that takes the link down if nobody is using it from the local VHF side. Two additional 5 digital DTMF commands allow us to make the link permanent and remove it. This is used during Canwarn operations. The courtesy beep changes to a boop during local activity while the link is up. During linkup, the last 3 letters of the callsign are sent on the link and the local side as an acknowledgement the link is up. That's it. Pretty simple system that has been in use about 10 years now. The only reason to change it out at this point is to add another P25 capable repeater to the area. I'd like to keep the current functionality and possibly add a Weather Alert function. I have a remote serial port available at the site for programming. Some sort of command line interface would be best. I've looked at some of the Link Communications products and I've heard good things about them. Any other recommendations? Thanks, -- Steve steve.jones at rogers.com VE3XF
Re: [Repeater-Builder] Controller recommendations
I forgot two items which will affect my choice: 1) Control codes cannot contain the DTMF codes A,B,C or D since I don't have a radio with the full 4x4 keypad. 2) The Quantar will probably have to be left setup as a repeater in order to pass the P25. The controller would only need to key the repeater for link audio and repeater messages. -- Steve steve.jones at rogers.com
Re: [Repeater-Builder] Re: Silver plating of cavities advice please?
OK then, how about a 1919 threepence piece? ;-) On Monday 12 July 2010 14:04:22 Dave wrote: and a silver dollar Good Lord manI'm English! --- In Repeater-Builder@yahoogroups.com, Barry ate...@... wrote: If you have a stable dc supply some chemicals to make a pickle solution and a silver dollar the rest is easy google is very useful by the way -- STeve Andre' Disease Control Warden Dept. of Political Science Michigan State University A day without Windows is like a day without a nuclear incident.
Re: [Repeater-Builder] 6 Meter Heliax Duplexers
Hi OH right, one theory out the window then. I made one but it was very poor so I have on order from Procom a real 50Mhz duplexer. Steve - Original Message - From: Tim tahr...@swtexas.net To: Repeater-Builder@yahoogroups.com Sent: Monday, July 05, 2010 12:13 AM Subject: 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 Yahoo! Groups Links
Re: [Repeater-Builder] 6 Meter Heliax Duplexers
Hi Tim glad you sorted it,they do work very well as a lot of 6mtr rptrs here in the UK use them, I had no success, big problem. I checked it with my analyser and the isolation was rubbish at 30dB, so I binned it 73 Steve
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
RE: [Repeater-Builder] Re: Alinco DR-03T
I would love one. contact me off forum K4SLB at R2I.NET From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of terry_wx3m Sent: Monday, June 14, 2010 08:51 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Alinco DR-03T I have some Micor mobiles on 31 MHZ 100 Watt would make dandy 10 meter radios. Yours free for the shipping, --- In Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com , Doug Hutchison specialq@... wrote: Hi Andrew, Initially thank you for announcing the new box - cannot find it here yet. Have a DR-M03 obsolete (no T). It is OK as a link TXR, duty cycle might be a problem for repeater but a big enough cooler may solve that. Mine is 10w o/p, performs OK. Doug On 13/06/2010 20:30:33, vk4jv (vk...@...) wrote: Hi Guys Has anyone used the new alinco DR-03T 10M rigs in a repeater ? I wish to get a 10M repeater going but have to use split sites and use UHF links between them... also.. any other ideas on radios to use ? cheers Andrew Yahoo! Groups Links image001.gifimage002.jpgimage003.jpg
Re: [Repeater-Builder] Icom IC-F1010 x 2 as repeater!!??
Hi you must remember they are mobiles and not intended for use as a rptr, the rx will be ok but you must watch the tx PA as it will get very hot and depending on the pwr you will need a fan. What freq are you using as you would be better getting a proper base station such as a Tait 300/800 a Philips FX5000 or a Philips PFR10 73 Steve - Original Message - From: la4vna la4...@c2i.net To: Repeater-Builder@yahoogroups.com Sent: Saturday, June 05, 2010 4:46 PM Subject: [Repeater-Builder] Icom IC-F1010 x 2 as repeater!!?? Our Ham group wants to get a newer repeater, and I have got 2 Icom IC-F1010. I have got some info that this radio is perhaps not the best radio model from Icom as a repeater! I have not yet open the radios, so I need all the info I can get about this F1010 models, working. Thanks la4vna,Harald A.Eriksen Yahoo! Groups Links
[Repeater-Builder] Antenna Separation UHF Low Power
I am looking at putting together a 5w uhf repeater using 2 uhf m200s and a Rick we have on hand. We want to do coverage tests prior to investing in a duplexer, how far apart do we need to place our antennas?
Re: [Repeater-Builder] Motorola Maxtrac for cw beacon
Hi should be easy just use one of the cheap CW iders.3 connections ground, ptt and tx af in Steve - Original Message - From: Gordon gma...@bellsouth.net To: Repeater-Builder@yahoogroups.com Sent: Sunday, May 30, 2010 2:53 PM Subject: Re: [Repeater-Builder] Motorola Maxtrac for cw beacon Sorry for the confusion, must have had repeater on the brain. I did not mean repeater. I would like to setup a beacon on the lower part of 6 meters around 50.060 cw only. Thanks, Gordon N4LR Mike Morris wrote: At 01:46 PM 05/28/10, you wrote: Is it possible to mod a maxtrac for cw operation for a ham 6 meter repeater. If not maxtrac what about other Motorola or GE Radios. Gordon N4LR I'm not understanding something. The subject line says CW beacon, the body of your message refers to CW operation and a repeater. Last I knew, most repeaters do voice... Can you clarify? Mike WA6ILQ Yahoo! Groups Links
Re: [Repeater-Builder] Motorola Maxtrac for cw beacon
Hi yes I use a pair of 50Mhz maxtracs as a rptr and all in/oututs are via the 16w acc socket. Yes the firmware will not allow the rss to control the tx pwr out so a little cut and and a pot to the 9.6v line allows manual pwr control 73 Steve, M1SWB(UK) - Original Message - From: James H Vernetti wd0...@msn.com To: Repeater-Builder@yahoogroups.com Sent: Sunday, May 30, 2010 7:05 PM Subject: Re: [Repeater-Builder] Motorola Maxtrac for cw beacon I did one a year or two ago, do not key the PTT as it will have a very nasty output. I did the manual power control mod to control the output power and then broke the B+ line to the second driver in the power amp section, key it with a relay and it will work fairly well. - Original Message - From: Steve steve.m1...@tiscali.co.uk To: Repeater-Builder@yahoogroups.com Sent: Sunday, May 30, 2010 8:19 AM Subject: Re: [Repeater-Builder] Motorola Maxtrac for cw beacon Hi should be easy just use one of the cheap CW iders.3 connections ground, ptt and tx af in Steve - Original Message - From: Gordon gma...@bellsouth.net To: Repeater-Builder@yahoogroups.com Sent: Sunday, May 30, 2010 2:53 PM Subject: Re: [Repeater-Builder] Motorola Maxtrac for cw beacon Sorry for the confusion, must have had repeater on the brain. I did not mean repeater. I would like to setup a beacon on the lower part of 6 meters around 50.060 cw only. Thanks, Gordon N4LR Mike Morris wrote: At 01:46 PM 05/28/10, you wrote: Is it possible to mod a maxtrac for cw operation for a ham 6 meter repeater. If not maxtrac what about other Motorola or GE Radios. Gordon N4LR I'm not understanding something. The subject line says CW beacon, the body of your message refers to CW operation and a repeater. Last I knew, most repeaters do voice... Can you clarify? Mike WA6ILQ Yahoo! Groups Links Yahoo! Groups Links
Re: [Repeater-Builder] Duplexer on the cheap worries
Hi have you put a spectrum analyser on the rx port and fed, from a signal generator, the tx freq into the aerial input making sure that the tx port is terminated at 50 ohms. What freqs, what split. You need to know just what level is getting to the rx port, it has to be around 70dB rejection or you will allways have some desense 73 Steve - Original Message - From: kc0mlt kc0...@yahoo.com To: Repeater-Builder@yahoogroups.com Sent: Friday, May 21, 2010 3:28 PM Subject: [Repeater-Builder] Duplexer on the cheap worries Hello all. I am trying to figure out if the duplexer we have put together is up to the task or not. Here is the situation. We have four cavities 6.5 dia. one is a vari-notch the others are simple reject cans. Two rejects are on the TX side and one reject and the vari-notch are on the RX side. All set and tuned with rg-213 jumpers between cans and RG-142 from the cans to the Tee connector. We are doing some light testing with a cheap dual ban antenna on the garage. It is feed with RG-8 about 70 feet. We are having some issues with receive. It kind of sounds like desense but I think it is something wrong with the receiver. I was just wondering if the cobbeled together cans sound like thay are doing a good enough job as a duplexer or if we do have something to change on it. The repeater is only putting out 2 watts for testing. I would think I have enough separation for that power level. Any suggestions or thoughts woyuld be greatly appreciated. Thanks Wade KC0MLT Yahoo! Groups Links
Re: [Repeater-Builder] Duplexer on the cheap worries
Hi Tim see my message, you really do need to check isolation with an analyser I had a look at a duplexer for a chap and there was just 30dB isolation so needless to say the desense was tremendous. It took an input signal of around 70 microvolts to overcome desense. I retuned it on my analyser and got 80dB and it worked Steve - Original Message - From: Tim Sawyer To: Repeater-Builder@yahoogroups.com Sent: Friday, May 21, 2010 3:47 PM Subject: Re: [Repeater-Builder] Duplexer on the cheap worries RG-8 is not good for duplex. The braid will make TX noise and get into the receiver. Cheap antennas can make the same problem. Test into a dummy load right at the duplexer. If no noise then you know it's the feed line and/or antenna. 6.5 inch dia cans are big ones so you should have plenty of isolation specially for 2 watts. On Fri, May 21, 2010 at 7:28 AM, kc0mlt kc0...@yahoo.com wrote: Hello all. I am trying to figure out if the duplexer we have put together is up to the task or not. Here is the situation. We have four cavities 6.5 dia. one is a vari-notch the others are simple reject cans. Two rejects are on the TX side and one reject and the vari-notch are on the RX side. All set and tuned with rg-213 jumpers between cans and RG-142 from the cans to the Tee connector. We are doing some light testing with a cheap dual ban antenna on the garage. It is feed with RG-8 about 70 feet. We are having some issues with receive. It kind of sounds like desense but I think it is something wrong with the receiver. I was just wondering if the cobbeled together cans sound like thay are doing a good enough job as a duplexer or if we do have something to change on it. The repeater is only putting out 2 watts for testing. I would think I have enough separation for that power level. Any suggestions or thoughts woyuld be greatly appreciated. Thanks Wade KC0MLT -- :wq Tim
Re: [Repeater-Builder] Duplexer on the cheap worries
How true you can also tune duplexers using a receiver, but you need a signal generator. I would ask if anyone local to him has the gear to check his setup, you can spend a long time playing with duplexers without the right test gear, I know from experience. The other thing is insertion loss Yes you do need to use good coax and decent connectors 73 Steve - Original Message - From: Tim Sawyer To: Repeater-Builder@yahoogroups.com Sent: Friday, May 21, 2010 4:17 PM Subject: Re: [Repeater-Builder] Duplexer on the cheap worries Yep, low isolation in the duplexer could be the problem. And the correct thing to do is measure it. But if he doesn't have the test gear putting a dummy load on the output of the duplexer will give a pretty good idea whether the duplexer is tuned correctly or not. If there's no desense with a dummy load then the RG-8 might be the problem. On Fri, May 21, 2010 at 7:59 AM, Steve steve.m1...@tiscali.co.uk wrote: Hi Tim see my message, you really do need to check isolation with an analyser I had a look at a duplexer for a chap and there was just 30dB isolation so needless to say the desense was tremendous. It took an input signal of around 70 microvolts to overcome desense. I retuned it on my analyser and got 80dB and it worked Steve - Original Message - From: Tim Sawyer To: Repeater-Builder@yahoogroups.com Sent: Friday, May 21, 2010 3:47 PM Subject: Re: [Repeater-Builder] Duplexer on the cheap worries RG-8 is not good for duplex. The braid will make TX noise and get into the receiver. Cheap antennas can make the same problem. Test into a dummy load right at the duplexer. If no noise then you know it's the feed line and/or antenna. 6.5 inch dia cans are big ones so you should have plenty of isolation specially for 2 watts. On Fri, May 21, 2010 at 7:28 AM, kc0mlt kc0...@yahoo.com wrote: Hello all. I am trying to figure out if the duplexer we have put together is up to the task or not. Here is the situation. We have four cavities 6.5 dia. one is a vari-notch the others are simple reject cans. Two rejects are on the TX side and one reject and the vari-notch are on the RX side. All set and tuned with rg-213 jumpers between cans and RG-142 from the cans to the Tee connector. We are doing some light testing with a cheap dual ban antenna on the garage. It is feed with RG-8 about 70 feet. We are having some issues with receive. It kind of sounds like desense but I think it is something wrong with the receiver. I was just wondering if the cobbeled together cans sound like thay are doing a good enough job as a duplexer or if we do have something to change on it. The repeater is only putting out 2 watts for testing. I would think I have enough separation for that power level. Any suggestions or thoughts woyuld be greatly appreciated. Thanks Wade KC0MLT -- :wq Tim -- :wq Tim
Re: [Repeater-Builder] Re: Duplexer notch blurred - why?
why do I see the same message twice ?. - Original Message - From: cruizzer77 atlant...@gmx.ch To: Repeater-Builder@yahoogroups.com Sent: Thursday, May 20, 2010 11:39 PM Subject: [Repeater-Builder] Re: Duplexer notch blurred - why? I only had a quick try tonight and found that I can get a pretty sharp line on the display if I turn the rf gen amplitude up to 10dBm. Then I need to turn down the ref level to 20dBm to have the curve inside the display at all. Furthermore there was a warning change rf gen amplitude, output port or atten hold (if on) which appeared while I was trying around. However I can't get the picture right otherwise. There was no time yet to try different cable lengths. Regards Martin Yahoo! Groups Links
Re: [Repeater-Builder] Re: Duplexer notch blurred - why?
Thanks Chuck 73 Steve,M1SWB(UK) - Original Message - From: Chuck Kelsey wb2...@roadrunner.com To: Repeater-Builder@yahoogroups.com Sent: Thursday, May 20, 2010 11:57 PM Subject: Re: [Repeater-Builder] Re: Duplexer notch blurred - why? Yahoo has been messing up over the last few weeks. I've been getting multiple posts too. Chuck - Original Message - From: Steve steve.m1...@tiscali.co.uk To: Repeater-Builder@yahoogroups.com Sent: Thursday, May 20, 2010 6:48 PM Subject: Re: [Repeater-Builder] Re: Duplexer notch blurred - why? why do I see the same message twice ?. Yahoo! Groups Links
[Repeater-Builder] DB 224E Harness wanted
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: 220 equipment
Our local group is looking for some 220 stuff. No money though but would like to get them on the air around the Disney area From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Bill Sent: Wednesday, May 05, 2010 09:50 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: 220 equipment Want to sell or donate them... they are FM and depending on if you have the base side or the boat side unit, it may be tx high or tx low. I am looking for the manuals for these units from the mid 1980's either the base or boat side. They were used on river boats mostly on the Mississippi River. Where are you located... . Bill Atlanta w4oo . . . . --- In Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com , NORM KNAPP nkn...@... wrote: I came across some 220mhz equipment and was wondering if it was good for anything... I got 3 Intech Incorporated COM 218 repeaters (?). Are these ACSB or are they FM? I also have some DB products circulators and a duplexer and a preselector TTA or something to that effect. 73... Norm image001.gifimage002.jpgimage003.jpg
[Repeater-Builder] Programming Kenwood TKR-820 without KPT-50
I'm looking for information on how to program and edit binary files for the 2 EEPROMS in the Kenwood TKR-820 UHF repeater without using the KPT-50. I have IC programmers available through work. Thanks, Steve AB5ID
[Repeater-Builder] Re: Programming Kenwood TKR-820 without KPT-50
Excellent tutorial! Thank very much! -Steve --- In Repeater-Builder@yahoogroups.com, DCFluX dcf...@... wrote: Brute Force Hacking the TKR-820 / 720 Series Hey, these make great little repeaters. They also are becoming fairly common on the surplus market as companies are caving into the idea that digital cellular is a better alternative to NBFM. Well anyway I am sure you bought one for cheap or acquired one by some other means with the thoughts that you could drag it into the ham band. So lets begin. First lets make sure the repeater works. Start by connecting a watt meter with dummy load to the TX port (Or the antenna port on models with the built in duplexer). Use the 25W 200-500 or 400-1000 slug are the closest thing you have. Loosen the squelch until the repeater goes into transmit mode, remember to press the repeat button on the front panel. Won't do it? Turn the unit off pull the covers and remove the 93C46 EEPROM from the controller board (This is the little board that is about 3X5 and sits above the radio chassis'). This sets the DPL/PL combination and without it the repeater will activate on COS. Turn it back on and it should repeat. Got RF power? Good. Set this little bastard aside as we will deal with him later. Next step is to take write down the voltage on the from the test points besides the VCOs. The VCOs are located under the metal tray that the controller sits on. This should be some where around 4 volts DC. Now we have to come up with a way to change the data that sets the frequency of the repeater. For some reason the chip that does this is on the circuit board on the front panel of the repeater. I was originally told that Either a KPT-20 or KPT-50 is need to program those. No way around it. That sounds like a wager to me. Sure if you have a Kenwood dealer around that you can borrow one from or willing to spend more than you bought the repeater for this is a sure fire method. Oh, you will also need the KPG-21D software, but it will not allow operation into the ham bands and has some serious compatibility issues running on modern hardware. Unsolder the 93C46 EEPROM from the front panel board. Use what ever method you like, I prefer my trusty static free Soldapult. Be careful not to rip and leads off the package when removing it. Place an 8 pin DIP socket in the hole that you got the EEPROM out of and solder it down. Now we get the data out of the chip. I built a serial port to EEPROM interface found here: http://www.lancos.com/e2p/siprog_base.png and http://www.lancos.com/e2p/si-prog-v2_2.pdf in order to be used with the device programming software Pony Prog http://www.lancos.com/prog.html. You have to build the base board and then the socket for the device you wish to program. I replaced the LM2936Z-5 in the schematics with a 5.1 V Zener diode fed with a 330 ohm resistor to generate the +5 needed, and BC547 is the European equivalent of a 2N3904. This way all parts can be obtained from your local Radio Shack, or your parts box depending on how much home brew you do so well. So once you have the interface built and running you can read the EEPROM contents. The settings take a little while to get used to. All you want it to output to is a raw binary dump with no header information saved. Open the dump with a hex editor. I like XVI32, http://www.chmaas.handshake.de/delphi/freeware/xvi32/xvi32.htm . Pretty hard to beat free. Now for some reason the Pony Prog spit out information that is interleaved. This is evident by the way the data is arranged at H7A, Which on my dumps is 8R021N. On a Kenwood KPG-21D generated image this should say R820N. Anyway, it makes the hex coding easier to understand when doing the channels. If you are using a different chip program that did it right you will have to swap the bytes around, i.e C884 to 84C8. It should be obvious when you do the calculations and your frequency is in the 650MHz region. Receiver frequency data starts at H00 and it 2 bytes long. In my binary image I have H8338. Open up the windows calculator and place it in scientific mode (Or you can use a decent calculator that will convert Hex to decimal such as the TI-36X.). Press the Hex button and enter in the data that you have. Then press Dec. H8338 = 33592. Now we multiply this by the channel stepping. 12.5 for the TKR-820 and 5 for the VHF 720. 33592 * 12.5 = 419900. Now we add the IF frequency 419900 + 21400 = 441300 441.300MHz. You still with me? Good. The transmit side is the exact same thing, but starts at H02. I find this odd that both the transmit side and the receive side use IF frequencies on the synthesizers, but what ever. Now that you have reverse engineered what channels the repeater is on, Stick that chip back in there. You get to do . More testing. If you have the internal duplexer now would be a good time to bypass it and go straight into a watt meter
Re: [Repeater-Builder] Talkthrough unit
seperate tx/rx either 2 aerials or a duplexer. When the rx receives a signal it switches on the tx and feeds the rx audio into the tx and retransmits it - Original Message - From: antony antonyebu...@hotmail.com To: Repeater-Builder@yahoogroups.com Sent: Sunday, May 02, 2010 9:48 PM Subject: [Repeater-Builder] Talkthrough unit Hi could any one roughly explain how a talkthrough unit works. thanks antony Yahoo! Groups Links
Re: [Repeater-Builder] Need help with a Motorola R-100 repeater
why not try and find the manual ?, google for it - Original Message - From: Jorge np...@yahoo.com To: Repeater-Builder@yahoogroups.com Sent: Tuesday, March 23, 2010 4:14 PM Subject: [Repeater-Builder] Need help with a Motorola R-100 repeater Hello to the all in the group. I bought a Motorola R-100 repeater it has a bad controller. I would like to add a external repeater controller to it. I need to know how to hook it up to external controller. If it's possible please let me know. Many thanks you -Jorge Yahoo! Groups Links
Re: [Repeater-Builder] Commercial Antenna for 2m Repeater Question
Good advice, I would suggest putting your TX onto the ant and check the vswr before doing anything else Steve, M1SWB - Original Message - From: Larry Horlick To: Repeater-Builder@yahoogroups.com Sent: Monday, March 22, 2010 2:58 PM Subject: Re: [Repeater-Builder] Commercial Antenna for 2m Repeater Question Before writing this off do a return loss analysis of the antenna. In my experience I have found that often the antenna will cover a broader frequency range that the spec says. lh On Mon, Mar 22, 2010 at 10:13 AM, David Jordan wa3...@comcast.net wrote: Hi Folks, Our club has been given permission to use one of the Public Safety antennas for our 2m repeater. The antenna is a PD-220-3A 150.5-158.5MHz. Our repeater freq. is 146.745. The antenna is fed with some nice looking Cell Flex LCF-12-50 ju, hard-line. The PD-200 is one of those totally enclosed fiberglass antennas; we don’t have funds to pay for a climb to take down or replace or tweak. Have two questions: We think we can live with the power loss if we build a coupler to match the inevitable high SWR. Can someone point us to a formula to estimate/calculate both the projected SWR and power loss, etc? WAGs R fine too. Is anyone aware of any 2m coupler projects that might work for this scenario? Our current repeater antenna is in the attic of one of our members garage at 25ft ASL…this antenna would be 425ft ASL…so even with losses we expect significantly better performance. 73, Dave WA3GIN
Re: [Repeater-Builder] building a repeater out of 2 Kenwood TK-830G's
Hi I assume they are mobiles and as such you will have to watch the tx pa or it will cook, rx wise no problem. Dosn't matter if they were made for PS use they were, like most mobiles only intended for limited tx times.. Steve - Original Message - From: briansoehl brianso...@alliancecom.net To: Repeater-Builder@yahoogroups.com Sent: Tuesday, March 16, 2010 5:23 PM Subject: [Repeater-Builder] building a repeater out of 2 Kenwood TK-830G's Has anyone built a repeater out of 2 TK-830G's? I have 2 and want to build a repeater to replace one. These are high spec radios designed for use in public safety and I feel they'd make a good repeater. Any help would be greatly appreciated. Brian Yahoo! Groups Links
Re: [Repeater-Builder] Commercial-Grade Repeaters for 6m
Hi sounds good but what about prices ?, they arn't going to be inexpensive are they Steve - Original Message - From: David Epley To: Repeater-Builder@yahoogroups.com Sent: Tuesday, March 09, 2010 12:05 PM Subject: RE: [Repeater-Builder] Commercial-Grade Repeaters for 6m I have VHF and UHF that I converted down from the commercial bands. They took slight retuning and a very small software hack. I liked what I saw so much I inquired about six meters. I was told that they would make any ham frequency I wanted. David Epley, N9CZV Randolph County Emergency Coordinator 4866N 400E Winchester, Indiana 47394 Cell765.546.2592 n9...@arrl.net
Re: [Repeater-Builder] Re: 200 watts on a repeater transmitter - was something else...
ermmm, being in the UK, what's an aligator ? Steve - Original Message - From: Kris Kirby k...@catonic.us To: Repeater-Builder@yahoogroups.com Sent: Monday, March 08, 2010 4:16 PM Subject: Re: [Repeater-Builder] Re: 200 watts on a repeater transmitter - was something else... On Mon, 8 Mar 2010, nj902 wrote: It should also be noted that he is planning a system with voting receivers. It is very possible that these receivers will improve the talk-in sufficiently that the system will be talk-out limited even with 200 Watts. Until he has those recievers deployed and working, it's an alligator. --- In Repeater-Builder@yahoogroups.com, Kevin Custer kug...@... wrote: We have been over this many times. If a system is balanced with a receiver at -116 dBm running 50 watts of power, then it will be balanced with 200 watts and a properly deployed preamp adding 6 dB of gain. The added power level on the repeater transmitter helps with noise that is common in urban locations experienced by the mobile; noise that is not experienced by the repeater receiver. ... I think that one would be better served by choosing an antenna appropriate to the purpose of the repeater. If you need urban coverage, choose an antenna with more null-fill, or less gain. If you have to pay for power (or make your own power!), you'll spend more time working on an antenna that will cover what you need so your transmitter can be ten watts or less. -- Kris Kirby, KE4AHR Disinformation Analyst Yahoo! Groups Links
Re: [Repeater-Builder] Re: 200 watts on a repeater transmitter - was something else...
Thanks for that, saw them in the Keys many years ago. It seems logical that if a rptr tx is running 200w, and the mobile is running say 50w then it is going to be one way ie mobile hears rptr but rptr don't hear mobile too well 73 Steve - Original Message - From: NORM KNAPP nkn...@twowayradio.net To: Repeater-Builder@yahoogroups.com Sent: Monday, March 08, 2010 5:10 PM Subject: Re: [Repeater-Builder] Re: 200 watts on a repeater transmitter - was something else... An alligator is a cayman or crocodile like creature that has a massive mouth and marginal ears. The implication is that the repeater talks better and or farther that it hears or receives. 73 Norm - Original Message - From: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com Sent: Mon Mar 08 11:03:57 2010 Subject: Re: [Repeater-Builder] Re: 200 watts on a repeater transmitter - was something else... ermmm, being in the UK, what's an aligator ? Steve - Original Message - From: Kris Kirby k...@catonic.us mailto:kris%40catonic.us To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Monday, March 08, 2010 4:16 PM Subject: Re: [Repeater-Builder] Re: 200 watts on a repeater transmitter - was something else... On Mon, 8 Mar 2010, nj902 wrote: It should also be noted that he is planning a system with voting receivers. It is very possible that these receivers will improve the talk-in sufficiently that the system will be talk-out limited even with 200 Watts. Until he has those recievers deployed and working, it's an alligator. --- In Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com , Kevin Custer kug...@... wrote: We have been over this many times. If a system is balanced with a receiver at -116 dBm running 50 watts of power, then it will be balanced with 200 watts and a properly deployed preamp adding 6 dB of gain. The added power level on the repeater transmitter helps with noise that is common in urban locations experienced by the mobile; noise that is not experienced by the repeater receiver. ... I think that one would be better served by choosing an antenna appropriate to the purpose of the repeater. If you need urban coverage, choose an antenna with more null-fill, or less gain. If you have to pay for power (or make your own power!), you'll spend more time working on an antenna that will cover what you need so your transmitter can be ten watts or less. -- Kris Kirby, KE4AHR Disinformation Analyst Yahoo! Groups Links Yahoo! Groups Links
Re: [Repeater-Builder] Re: 200 watts on a repeater transmitter - was something else...
many thanks, a bit wiser now :-) Oh how I wish we had the same tx pwrs and freq,s here in the UK. We are limited to 25w erp and can only use dipole ants Our 70Cm amateur band is in 2 parts, 433/434 with 1.6Mhz split, so duplexers are hard to come by at an affordable price The other bit is 430/438 73 Steve - Original Message - From: AA8K73 GMail aa8...@gmail.com To: Repeater-Builder@yahoogroups.com Sent: Monday, March 08, 2010 5:09 PM Subject: Re: [Repeater-Builder] Re: 200 watts on a repeater transmitter - was something else... An alligator is a critter will a big mouth and tiny ears; an elephant has bigger ears. An alligator repeater is heard further that it can receive. An elephant repeater receives further than the repeater transmitter can be heard. Steve wrote: ermmm, being in the UK, what's an aligator ? Steve Yahoo! Groups Links
Re: [Repeater-Builder] Re: 200 watts on a repeater transmitter - was something else...
Thanks for info we don't have such problems in the UK as we can't use voters etc, our rptrs are just that, all in one place no remote rx,s, uhf links and silly freqs with 1.6Mhz split, 25w max 73 Steve - Original Message - From: Kevin Custer kug...@kuggie.com To: Repeater-Builder@yahoogroups.com Sent: Monday, March 08, 2010 8:33 PM Subject: Re: [Repeater-Builder] Re: 200 watts on a repeater transmitter - was something else... Steve wrote: It seems logical that if a rptr tx is running 200w, and the mobile is running say 50w then it is going to be one way ie mobile hears rptr but rptr don't hear mobile too well Common misconception. Lets say the mobile radio has a receive sensitivity of -116 dBm and 50 watts of transmitter power. The repeater has a receive sensitivity of -122 dBm - how much power will it take to balance out the receive advantage of the repeater? If you said 6 dB, you are correct. 50 watts with a 6 dB improvement is 200 watts. I have seen several VHF and UHF repeater systems with -125 dBm actual sensitivity on air - connected to the antenna and duplexing. You do the math... 400 watts is the answer. The original poster mentioned an LDG voter and remote links. If the repeater has remote receivers that will increase the distance of operation from the transmitter, he'll need all of his 200 watts. Kevin Custer Yahoo! Groups Links
Re: [Repeater-Builder] Re: 200 watts on a repeater transmitter - what's an alligator
OH, yes commonly know as leeches, suck you dry of money, property etc. Iam slowly learning American English :-) Was in the states many years ago and I enjoyed it but being English, and from Liverpool as well got some funny looks when I ordered food, like fish and chips with mushy peas 73 Steve - Original Message - From: skipp025 skipp...@yahoo.com To: Repeater-Builder@yahoogroups.com Sent: Monday, March 08, 2010 11:06 PM Subject: [Repeater-Builder] Re: 200 watts on a repeater transmitter - what's an alligator Steve steve.m1...@... wrote: ermmm, being in the UK, what's an alligator ? What..? You don't have or know any mother in law or ex-wife people in the UK..? s. Yahoo! Groups Links
Re: [Repeater-Builder] Interference
my 2 penny worth, what happens with the rptr aerial disconnected if it is the clean the signal is coming down the aerial, try using a piece of coax cut as a 1/4 wave stubb on the rptr rx input, this is of course cut to the offending freq Steve, M1SWB - Original Message - From: Leroy A. M. Baptiste leroybapti...@spiceisle.com To: Repeater-Builder@yahoogroups.com Sent: Thursday, March 04, 2010 3:53 PM Subject: RE: [Repeater-Builder] Interference When you key up the repeater, and you release, the repeater is held open (Sometimes), and you can hear the interference coming in. If I disconnect the FM Station, the repeater is as clean as a whistle. -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chris Quirk Sent: Thursday, March 04, 2010 11:34 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Interference Interesting problem, can you describe the interference?? --- On Thu, 3/4/10, wd8chl wd8...@gmail.com wrote: From: wd8chl wd8...@gmail.com Subject: Re: [Repeater-Builder] Interference To: Repeater-Builder@yahoogroups.com Date: Thursday, March 4, 2010, 6:57 AM On 3/4/2010 9:40 AM, Leroy A. M. Baptiste wrote: The only other station in the building is on 107.500MHz It could also be from an AM station on 600 KHZ +/-10 KHz. -Original Message- From: Repeater-Builder@yahoogroups.com http://us.mc456.mail.yahoo.com/mc/compose?to=Repe ater-buil...@yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com http://us.mc456.mail.yahoo.com/mc/compose?to=Repe ater-buil...@yahoogroups.com ] On Behalf Of wd8chl Sent: Thursday, March 04, 2010 10:21 PM To: Repeater-Builder@yahoogroups.com http://us.mc456.mail.yahoo.com/mc/compose?to=Repe ater-buil...@yahoogroups.com Subject: Re: [Repeater-Builder] Interference On 3/4/2010 8:56 AM, Leroy A. M. Baptiste wrote: Hello all, I am having some interference problems, it is coming from an FM transmitter on 94.500MHz, and getting into the Amateur Radio repeater's receiver on 146.1600MHz. It is not there all the time, but when the repeater is keyed up, you can hear it getting in. The 2 Meter repeater is fed with heliax cable from the duplexer to the antenna, the transmission line on the FM station is ordinary coaxial cable, the power output is about 300 Watts, any ideas? Leroy. J39AI Is there another FM station on either 95.1 or 93.9? Guess what-600 KHz! Natural intermod source! Yahoo! Groups Links http://groups.yahoo.com/group/Repeater-Builder/ http://groups.yahoo.com/group/Repeater-Builder/ http://groups.yahoo.com/group/Repeater-Builder/joi n http://groups.yahoo.com/group/Repeater-Builder/jo in (Yahoo! ID required) repeater-builder-dig...@yahoogroups.com http://us.mc456.mail.yahoo.com/mc/compose?to=Repe ater-builder-dig...@yahoogroups.com repeater-builder-fullfeatu...@yahoogroups.com http://us.mc456.mail.yahoo.com/mc/compose?to=Repe ater-builder-fullfeatu...@yahoogroups.com repeater-builder-unsubscr...@yahoogroups.com http://us.mc456.mail.yahoo.com/mc/compose?to=Repe ater-builder-unsubscr...@yahoogroups.com http://docs.yahoo.com/info/terms/ Yahoo! Groups Links
Re: [Repeater-Builder] Interference
Pardon me for butting in again. Start with the simple things like taking the aerial off the rptr rx and see if that cures it. How far apart are the FM and rptr aerials, as it sounds like pure rf getting into the rx. Is the duplexer tuned right to give around 80db isolation as it maybe the rptrs own tx causing probs allthough he did say taking the FM,s aerial off cured it. Still recon my idea of a coax notch filter in the rx input will cure it. Steve - Original Message - From: Larry Horlick To: Repeater-Builder@yahoogroups.com Sent: Thursday, March 04, 2010 11:33 PM Subject: Re: [Repeater-Builder] Interference Is it IMD, though? Could it be in the audio chain? Leroy, did you troubleshoot from this angle? On Thu, Mar 4, 2010 at 12:53 PM, Leroy A. M. Baptiste leroybapti...@spiceisle.com wrote: Yes, they are. -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Larry Horlick Sent: Friday, March 05, 2010 1:36 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Interference The 2m repeater and FM transmitter are at the same site? lh On Thu, Mar 4, 2010 at 8:56 AM, Leroy A. M. Baptiste leroybapti...@spiceisle.com mailto:leroybapti...@spiceisle.com wrote: Hello all, I am having some interference problems, it is coming from an FM transmitter on 94.500MHz, and getting into the Amateur Radio repeater's receiver on 146.1600MHz. It is not there all the time, but when the repeater is keyed up, you can hear it getting in. The 2 Meter repeater is fed with heliax cable from the duplexer to the antenna, the transmission line on the FM station is ordinary coaxial cable, the power output is about 300 Watts, any ideas? Leroy. J39AI
Re: [Repeater-Builder] Pair of GM300 as a repeater
Hi yes they do work, not intended for use as a repeater, even with a fan running full pwr is risky, depends on what sort of rptr if amateur then some of the overs can and do last 10 minutes or more. Again if amateur with a 600Kc split the dupexer will cost you a load of money Steve - Original Message - From: Leroy A. M. Baptiste leroybapti...@spiceisle.com To: Repeater-Builder@yahoogroups.com Sent: Thursday, February 25, 2010 7:24 AM Subject: RE: [Repeater-Builder] Pair of GM300 as a repeater In response to your Gm300s as repeaters, I have been using them for years without any problems, power up full(with fan coming on at transmit) and a 600 KHz spacing. I also have a pair of SM 50s working as a repeater with a much wider spacing. It has been operating for years now, without any problems. I will be happy to share more info. -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Steve Sent: Friday, February 26, 2010 3:01 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Pair of GM300 as a repeater Hi they work OK but you must turn the tx pwr right down and fit a fan or pa won't last long. It is down to the duplexer finding a unit suitable at the right price will be almost impossible, the 5Mhz split is ok as you can get cheap duplexers from Hong Kong 73 Steve - Original Message - From: la88y llhorl...@gmail.com mailto:llhorlick%40gmail.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Thursday, February 25, 2010 4:46 PM Subject: [Repeater-Builder] Pair of GM300 as a repeater I'm wondering about the suitability of a pair of VHF GM300s as a repeater. Is the shielding sufficient to allow 600 kHz between Rx and Tx? If not, what is the suggested minimum? Same questions for UHF SM50, but with a 5 mHz split? lh Yahoo! Groups Links Yahoo! Groups Links
Re: [Repeater-Builder] Pair of GM300 as a repeater
Hi they work OK but you must turn the tx pwr right down and fit a fan or pa won't last long. It is down to the duplexer finding a unit suitable at the right price will be almost impossible, the 5Mhz split is ok as you can get cheap duplexers from Hong Kong 73 Steve - Original Message - From: la88y llhorl...@gmail.com To: Repeater-Builder@yahoogroups.com Sent: Thursday, February 25, 2010 4:46 PM Subject: [Repeater-Builder] Pair of GM300 as a repeater I'm wondering about the suitability of a pair of VHF GM300s as a repeater. Is the shielding sufficient to allow 600 kHz between Rx and Tx? If not, what is the suggested minimum? Same questions for UHF SM50, but with a 5 mHz split? lh Yahoo! Groups Links
Re: [Repeater-Builder] Pair of GM300 as a repeater
Hi someone answered this but mainly for PA protection as most mobiles are made for limited tx time. I made a UHF rptr with 2 GM300,s and an ICS controller, but I turned down the pwr to just 3 watts and fed it into a 6dB gain ant so erp is around 12w works well and gives the coverage I need. I will fit a better fan when I get time. Being in the UK we are only allows 25w erp so with a good ant no need to set tx pwr high. I also built a 6mtr rptr using 2 low band maxtracs and did the manual pwr mod to the tx unit, all great fun Steve - Original Message - From: Larry Horlick To: Repeater-Builder@yahoogroups.com Sent: Thursday, February 25, 2010 7:23 PM Subject: Re: [Repeater-Builder] Pair of GM300 as a repeater Steve, So the reason for turning down the power is for PA protection or RF suppression? lh On Thu, Feb 25, 2010 at 2:00 PM, Steve steve.m1...@tiscali.co.uk wrote: Hi they work OK but you must turn the tx pwr right down and fit a fan or pa won't last long. It is down to the duplexer finding a unit suitable at the right price will be almost impossible, the 5Mhz split is ok as you can get cheap duplexers from Hong Kong 73 Steve - Original Message - From: la88y llhorl...@gmail.com To: Repeater-Builder@yahoogroups.com Sent: Thursday, February 25, 2010 4:46 PM Subject: [Repeater-Builder] Pair of GM300 as a repeater I'm wondering about the suitability of a pair of VHF GM300s as a repeater. Is the shielding sufficient to allow 600 kHz between Rx and Tx? If not, what is the suggested minimum? Same questions for UHF SM50, but with a 5 mHz split? lh Yahoo! Groups Links
Re: [Repeater-Builder] Re: GM300/Maxtrac 2w conversion
Hi I have some low band maxtracs here in the UK and want to use them on 6mtrs, the rx side is fine but the firmware won't allow you to set the tx pwr above 50Mhz, so I intend to do the pwr mod, just one track cut and a pot between the 9.6v, and one side of the cut. I have found that my gm300,s can be set to lower power by just using the rss. I turned one down to 3w no problem Steve, M1SWB - Original Message - From: kg6uyz kg6u...@gmail.com To: Repeater-Builder@yahoogroups.com Sent: Thursday, February 18, 2010 7:31 AM Subject: [Repeater-Builder] Re: GM300/Maxtrac 2w conversion Try the manual power mod, iv taken a low power 900 maxtrac and brought it down to about 250mw before the radio stops tx'ing, it got stabler at about 350mw. I had a range of a stable 350mw to 20w or so. I dont know if the mod can be done to a GM300 as i have never done one to that radio, but iv done many to maxtracs. No major hardware changes, look up the mod in the maxtrac section on repeater-builder. I used the radioshack 10k 15 turn pot btw... Jeff - KG6UYZ Yahoo! Groups Links
Re: [Repeater-Builder] anttena problem
maybe water in it, have you tested the vswr ?, this will tell you if it is duff or not Steve,M1SWB - Original Message - From: m0csv bobm1...@aol.com To: Repeater-Builder@yahoogroups.com Sent: Monday, February 15, 2010 1:51 PM Subject: [Repeater-Builder] anttena problem Hi i have a Vertex VXR7000 repeater i use for my taxi business, im using a colinier anttena made by skymasts i had trouble with the first ant they sent me it was tx ing a very distorted signal after id been using it for a while, skymasts replaced it and told me it had earthing problems, now this replacement after working fine for a few months doesent seem to tx a good as it did, i have a very noisy signal about 4 or 5 miles away from repeater, which was a good signal in the past, litening to cars back at the reapeater site they are a good sinal in no noise to speak of, i have test the output from repeater and as far as i can see it has over the stated 10 watts output, is it possible that the ant is ok on RX but breaking down on TX, any help with this prob would be a big help, thanks Bob (M0CSV) Yahoo! Groups Links
Re: [Repeater-Builder] Re: 11m Repeater
Hi Why not use a uhf link ?, cheaper than a phone line and probably more reliable. 27Mhz, is in the cb band, isn't it Steve - Original Message - From: i recycle computers kc8...@hotmail.com To: Repeater-Builder@yahoogroups.com Sent: Friday, February 12, 2010 6:05 PM Subject: [Repeater-Builder] Re: 11m Repeater here is my thought on how to implement this... TX site: Feq: 27.315 TPO: 4 Watts Mode: AM Antenna: Custom Dual 4 Bay Folded Dipole Filter: Bp: 27.315 Br: 27.965 Coax: Andrew 1 Inch Hardline Controller: Rack Mount Custom Controller, and Receive Voter Transmitter: Cutom Built Crystal Controlled 4 Watt AM Transmitter Rx Site: Freq: 27.965 Mode: AM Antenna: Custom Dual 2 Bay Folded Dipole Filter: Bp: 27.965 Br: 27.315 PreAmp: Custom Built Single Freq. Tower Mounted Pre Amp. Receiver: Custom Built Crystal Controlled AM Receiver Coax: Andrew 1 inch hardline Tx/Rx Site Seperation: 1 Mile Minimum Tx/Rx site Linking: Telco Wireline Yes I put a lot of thought into it :) I come up with all these wacky idea's, but never get around to implementing them. Thanks, Rev. Robert P. Chrysafis I Recycle Computers Saving UnWanted PC's From The Landfill One Computer At A Time :) Listen To My Free Live Police Scanner Feed for Tuscaloosa / Northport http://www.radioreference.com/apps/audio/?feedId=3836 Yahoo! Groups Links
Re: [Repeater-Builder] Just a Crazy Thought
On Thursday 11 February 2010 21:29:25 i recycle computers wrote: I have heard numorous urban legends of 27 MHz CB repeaters being built. has anyone ever come across such a thing. if not does anyone think it is even possible from a technical standpoint? the limitations are AM mode, and using any of the 40 CB channels with 4 watts PEP AM or 12 Watts PEP SSB ie: using completely un modified type certified CB gear. Legally a repeater is illegal on CB, but i just want to do an excersize in thought as to what problems someone may run into with such a project, etc. i have seen this questioned asked numorous times through the years and even heard rumors of it actually being done. no one though has actually went deep into the technical aspects of such a project or could point me out to the people who are operating or operated such a setup. Thanks, Rev. Robert P. Chrysafis Duplexers would be interesting to get. I can imagine the look on some sales reps face, when asked about pricing for an 11m unit. But you could certainly do a split site, in on channel 1 and out on channel 40 (or whatever actual frequency would be the farthest). Think of 10m repeaters and you've got most of the idea, though interference on 11m might be worse. Or has 11m usage dropped a lot because of cell phones? Me, I've never heard of one in operation. --STeve Andre' wb8wsf en82
Re: [Repeater-Builder] NewBy
Thanks Mark Yes I have built numerous repeaters all of which work, problem is finding suitable duplexers with the right freq split, ie 1.6Mhz or 600Kc/s, at a resonable price. In the UK it is almost impossible to find them, and for 50Mhz unless you want to spend 1000,s of pounds, is a defo no no. Have tried the heliax one but am not happy with them, hence a ready made one is needed 73 Steve, M1SWB - Original Message - From: Mark n9...@ameritech.net To: Repeater-Builder@yahoogroups.com Sent: Sunday, February 07, 2010 4:59 AM Subject: RE: [Repeater-Builder] NewBy Welcome, Steve! You'll find this list is a wealth of information when you decide to build a repeater, or for most other discussions of technical nature. Great bunch of guys here! 73 de Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of bainbridge_steve Hi Iam a new user to the group. My name is Steve licenced radio amateur M1SWB and I live in Liverpool UK. Main interests are building repeaters and fixing them :-) Iam currently building a 6mtr unit and need a Procom DPF 6/6 HX-150 duplexer, so if anyone has such a beast for sale, please contact me. 73 Steve Yahoo! Groups Links
Re: [Repeater-Builder] NewBy
Hi Mark thanks, yes I hope so as I need one fairly soon. Great film, Ferris Buellers day off :-) I get a fair bit of stuff from the USA, from ICS,NHRC, MRE and Iam well pleased. 73 Steve - Original Message - From: Mark n9...@ameritech.net To: Repeater-Builder@yahoogroups.com Sent: Sunday, February 07, 2010 7:56 PM Subject: RE: [Repeater-Builder] NewBy There are a couple of users here who offer duplexers... I have used one, and been very satisfied. (Hopefully Jeff will chime in soon! Buehler? Buehler???) 73 de Mark -N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of Steve Thanks Mark Yes I have built numerous repeaters all of which work, problem is finding suitable duplexers with the right freq split, ie 1.6Mhz or 600Kc/s, at a resonable price. In the UK it is almost impossible to find them, and for 50Mhz unless you want to spend 1000,s of pounds, is a defo no no. Have tried the heliax one but am not happy with them, hence a ready made one is needed 73 Steve, M1SWB Yahoo! Groups Links
[Repeater-Builder] Need help on identifying COMB number
Hi all, I have a mobile unit that has the COMB number of RT64AAU13A. Any idea what this is? Is it a low band? I am looking for a nice Low band to put a 10 meter link on my repeater. 73s and thanks Steve W4SEF Please reply to sefri...@gmail.com
Re: [Repeater-Builder] Information needed on Norcomm NC 401 ctcs encoder-decoder
Norcomm's web site is http://www.norcommcorp.com As far as I can tell they are still independently owned. Steve On 1/24/2010 15:21, Wayne wrote: From the web sight it looks like Norcomm turned in to Selectone which turned into Comm. Spec. This product is not listed on their sight. If anyone has information on this encoder- decoder I would appreciate hearing from you. The unit looks similiar to the Comm. Spec. TS-64 but the pin out is deferent. Wayne, WA5LUY Yahoo! Groups Links
Re: [Repeater-Builder] Information needed on Norcomm NC 401 ctcs encoder-decoder
Also could it be the NC104 you have?Here is a link to the manual for it as I don't see it actually listed on the site http://www.norcommcorp.com/Publication/Manuals/NC104-00.PDF On 1/24/2010 22:48, Steve Passmore wrote: Norcomm's web site is http://www.norcommcorp.com As far as I can tell they are still independently owned. Steve On 1/24/2010 15:21, Wayne wrote: From the web sight it looks like Norcomm turned in to Selectone which turned into Comm. Spec. This product is not listed on their sight. If anyone has information on this encoder- decoder I would appreciate hearing from you. The unit looks similiar to the Comm. Spec. TS-64 but the pin out is deferent. Wayne, WA5LUY Yahoo! Groups Links
RE: [Repeater-Builder] Re: my previous Caution post
At 08:44 AM 01/20/10, you wrote: Mike Morris wa6...@... wrote: You won't hear anything from me ! Skipp, please consider this an invitation to continue to post your warnings. Mike WA6ILQ moderator of repeater-builder Thank you Mike and everyone else... It was not a moderator of this group giving me grief for my first caution post. You've saved my bacon. I have since loaded Adblock Plus to Firefox and Thunderbird... 73 VK4JKL While Adblock Plus is one of the better Mozilla Firefox free Add-ons, the absolute best has to be Flashblock. Before Flashblock became available I couldn't even stand to have Flash Player installed on my computer. Now Flash Ads and unwanted items don't play unless I want them to and with the use of the white list allows me to enable entire sites (like Youtube). The use of Mozilla Firefox and the free Add-ons (available at the Mozilla web site) make it much more sane to browse the web. ... and of course everyone knows I'm a normal person, aren't all Amateur Radio Operators normal? cheers, s. To quote my dad (WB6SOX, now SK), Normal is a setting on the clothes dryer. Mike WA6ILQ Normal is also a place in Illinois.. de K4SLB
[Repeater-Builder] R2600 service monitor.
I don't know what the value is on these, but I have been using mine for many years. I love it. It does the things I need pretty well.
Re: [Repeater-Builder] Off topic ... a time for God
On Saturday 21 November 2009 10:28:37 ki4zji wrote: I am deeply offended by this. No, not the mention that we should take time out for God. I am offended by the barrage of tirades assaulting Lee for daring to mention God. *I* am deeply offended by having Christianity stuffed down my throat. I am not a Christian; I have never been--I was not raised as one, and I rather doubt that I will switch in this lifetime. So please take Jesus elsewhere and not a mailing list such as this. --STeve Andre' wb8wsf en82
RE: [Repeater-Builder] Power Connectors - spectras/GM/Maxtrac/...
Find a local trailer supply store, those pigtails are very common wiring plugs for trailers. _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of tahrens301 Sent: Sunday, November 15, 2009 4:49 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Power Connectors - spectras/GM/Maxtrac/... Hi Folks, I'm looking for some power connectors for the above types of radios. I don't need much more than pigtails, as I am doing a special cabling project. I've looked at both Mouser Digikey, but they don't seem to carry anything similar. I have seen 'generic' types before... somewhere! If anybody has some ideas, please let me know. I need about 20 of them. Thanks, Tim
Re: [Repeater-Builder] ACSSB
On Thursday 12 November 2009 07:34:08 n0fpe wrote: One thing to remember. Amatuers are NOT authorized to use ACSSB above 30mhz. Please check part 97 for the exact modes we are able to use. heck if we were there would be tons of ACSSB repeaters already modified into the ham band. No, thats not true. There are ARRL publications on acssb; at one point it was seen as a complement to FM repeaters, being able to fit inbetween the 20KHz spaced channels of repeaters. I'm not sure that was ever workable, but there was some effort (by amrad?) to disperse acssb equipment on 2m and maybe higher bands. --STeve Andre' wb8wsf en82
[Repeater-Builder] Re:Diplex antenna installation using coaxial cable for 10M and 6 M
In looking at the original message in this thread, I have used the absolutely most simple solution that is likely available anywhere. I am using a Syntor X9000 on both 10 and 6 M without anymore than a cut for 6M mobile bird killer whip and its associated spring with a Hustler 10M coil on top. Rounding up the necessary fittings for the top might take some looking but I have found them at least at the vendors at Dayton. The mount that I am using on one car is a homemade bracket that fastens between the fender and the hood and has an SO239 on one end and a 3/8 x 24 thread going at 90 degrees. It works perfectly. In fact I have two of them in use on two different vehicles. Simply cut the whip for probably 52.5 or so and establish the lowest SWR with the 10M coil attached and then adjust the 10M coil for resonance on 29.6. Other than the coil getting smacked once in awhile coming to near destruction I have had little problem with this set up. In probably about 5 years with this set up I've only lost one coil. Just one tech's / ham's idea/opinion.Now if the bands would only open up a little bit. HI! Thanks Steve Waltman KB3FPN
Re: [Repeater-Builder] RLC-1 Controller CPU
The HC711 (unlike the more common HC11) does have OTPROM which contains the RLC-1's firmware. You can order a pre-programmed replacement chip. You will have to set up you ID and any other non-default settings again as they are also stored inside that chip. Steve At 04:58 PM 9/6/2009, you wrote: According to the data sheet there is OTPROM and some EEPROM in the part depending on the ordering code, I'd say that there is at least some kind of boot loader if not all of the program memory in there and all of the stored values. See if you can get a replacement micro from the manufacturer. On Sun, Sep 6, 2009 at 3:22 PM, terry dalpoaskm...@yahoo.com wrote: Did try that, no luck. I did manually key it by applying 5V to the gate of the FET. That did work. Does look to be CPU, since it drives the FET directly. From: DCFluX dcf...@gmail.com To: Repeater-Builder@yahoogroups.com Sent: Sunday, September 6, 2009 4:00:53 PM Subject: Re: [Repeater-Builder] RLC-1 Controller CPU transistor may be shorted between gate and drain, try removing it off the board and try it again. On Sun, Sep 6, 2009 at 11:29 AM, terry dalpoaskm...@yahoo. com wrote: Hello. I have a Link Communications RLC-1 controller that has a bad repeater port. The only thing wrong with that port is that the 2n7000 FET that keys the PTT is not getting a signal from the processor. I checked at pin 36 of the CPU and it only has .37 volts when it tries to key up the transmitter. I have the link port setup for repeater, and I get 5 volts and pin 35 of the CPU. That port works fine. I have narrowed this down to something wrong in the processor. The processor is an MC68HC711E9. I can get these through Mouser and Allied. Does anyone know if these will work or are they programmed from Link Communications for their controllers? 73 Terry KM5UQ --- Steve Strobel Link Communications, Inc. 1035 Cerise Rd Billings, MT 59101-7378 (406) 245-5002 ext 102 (406) 245-4889 (fax) WWW: http://www.link-comm.com MailTo:steve.stro...@link-comm.com
Re: [Repeater-Builder] Re: An advocate for a little audio compression
[snip] - Original Message - Subject: Re: [Repeater-Builder] Re: An advocate for a little audio compression At 8/14/2009 17:54, you wrote: Sounds like, in essence, it was a closed repeater. Only those meeting some tough standards were allowed. Oh, it was very open. How tough can it be to simply speak up? Bob NO6B Well, I can think of at least two hams I've known with throat problems, such that they could not speak loudy. Yes, a pain but that was their disability. That repeater would have shut them out, which I consider rather unforunate. There is also the issue of emergencies: someone in some kind of accident (think auto) who either got a damaged mic, or is injured themselves, trying to use the repeater. While not likely in either case, its very real for that person if it happens. --STeve Andre' wb8wsf en82
[Repeater-Builder] Re: Closed Repeaters
This is a bit of another example where people want to extend their Constitutional Rights beyond what was intended. If we think any closed repeater system should be open to all because it uses a shared resource (the frequencies), then where do we stop? Does that mean that anyone gets to ride in my vehicle for free because I am driving on a public road, or Interstate Highway? How about Cellular systems, does this mean the Petitioner thinks anyone should be able to use my cell service because it operates on FCC licensed frequencies? How about all Fire Departments (for that matter ANY licensed service) using their repeaters on shared frequencies? Does this mean that many departments can just use the other agencies system and save their money, and the owner of a system has no recourse? It seems to me the gentlemen ( and Ladies ) have disappeared from the gentlemens agreements, and some coordination groups have applied the rules in an un-even manner. My repeaters are all open, but I support the right of others to do as they wish with their systems. It is still a lot of work and an expense to run even a single repeater, and many folks just want to take the politics out of it, so they should get to run their system the way they want. I DISAGREE with the language some people use on the radio, and even some of the topics I believe are inappropriate, these are some of the reasons people choose to run closed systems. If people disagree with a system philosophy or its owner, there are plenty of other repeaters, and if there are not other repeaters to use, then there should be plenty of pairs to put one up. Steve, N7KP.
[Repeater-Builder] A few things I'm Trying to Sell off .
Hear is a List of some stuff I am Trying to sell off . If there is anything you like Please Contactme at cat2...@aol.com . Pictures Available on request . thanks . For Sale EF Johnson Replacement Display for the 51SL / 5100 / 5100ES Portables . $35.00 Shipped . FS- 2 EFJ-51xx RF Deck Housing and Shields . (REAR HOUSING 5100 PORTABLE) . $25.00 Shipped . FS- 1 EFJ-51xx Series Model 2 Rubber Keypad . $8.00 Shipped . FS- EFJ-8180CX / 8190CR Viking Programming Cable Kit . $40.00 FS- GM300 Display Head Housing . No Parts inside . $5.00 FS- GM300 Display Logic Board . $5.00 FS- GM300 LOGIC BOARD - $10.00 FS- GM300 RF LOGIC BOARD - $10.00 FS- GM300 RUBBER Key's - $2.00 FS- SPECTRA Mounting Bracket - $8.00 FS- Saber Housing w/ Belt Clip - $5.00 FS- Saber Screen .NTN4541A - $2.00 FS- Saber DES Securenet Encryption - $25.00 FS- Saber RF PA - 438-470 MHz - $10.00 FS- Saber Saber Logic Board - $10.00 FS- Saber Back Sheilding NTN4647A - $2.00 FS- Saber NLE9461A - $8.00 FS- Motorola HT50 / HT90 Desktop Charger . $20.00 Plus SH . Note: All Parts are Used Selling as Is .
Re: [Repeater-Builder] SEA ESP1000 220Mhz Repeater
Mike, Be careful, they're ACSB not FM. As for programming them into the Ham band, I can't help there. 73, Steve / K6SCA --- On Thu, 7/9/09, Mike Mullarkey k7...@comcast.net wrote: From: Mike Mullarkey k7...@comcast.net Subject: [Repeater-Builder] SEA ESP1000 220Mhz Repeater To: Repeater-Builder@yahoogroups.com Date: Thursday, July 9, 2009, 5:16 PM Ok Guy’s, Got a new one here and looks to be a gem. Have an abundance of the SEA ESP1000 220Mhz repeaters. The question has anyone heard of them and will they program into the ham bands to utilize this nicely built repeater. They had Trident TNT controllers mated to them and the pin out looks pretty straight forward. We just want to know how to program them and see if they will play nice in the ham bands or are they a boat anchor. Thanks, Mike Mullarkey K7PFJ 6886 Sage Ave Firestone, Co 80504 303-954-9695 Home 303-954-9693 Home Office Fax 303-718-8052 Cellular
Re: [Repeater-Builder] Re: Heliax
On Sunday 05 July 2009 18:58:44 Curt Seaton wrote: Good day folks, I have come across some LDF7-50A heliax with commercially installed DIN connectors on each end. These are in 250 to 300 feet coils and in good condition. Most have the grounding straps already mounted. We also have the DIN to half inch pigtails available and will be included with each cable run...If any interest please let me know before the local club posts on ebay. These weigh several hundred pounds and we prefer the buyer to make their own transportation arrangements picking up in Norwalk, CT. 06851. There are 10 coils of these and have super low loss at the UHF frequencies, please see the Andrew specs for the LDF7 cable. These were in perfect operation conditions when removed from the tower. I would rather see hams use these rather than let them go to ebay or worse... I can send photos to serious interested parties, but need to post with ebay be end of week if no one else is interested. The place where they are stored is forcing us to move them out of the current location and we cannot use them all.. Many thanks for your consideration. Curt W1FSM Um, how much? --STeve Andre' wb8wsf en82
[Repeater-Builder] Re: GM300 Crossband Ham repeater Bi-Directional
--- In Repeater-Builder@yahoogroups.com, turboelesjuan kd0...@... Heres my question: Is there a controller I can build which has the ability to control TWO Motorola GM300 mobiles w/16pin connectors the same way? Use each radio as a transceiver for bi-directional traffic? I already have both of the GM300 radios and they didn't cost 400$, which my 8800 Did. I want something perm. installed at my house so I can use a small UHF handheld on low power anywhere around my area to chat. Is this possible? Thanks!! -Scott Yes it consists mainly of two 2N3906 transistors. http://www.batlabs.com/maxrpt.html
Re: [Repeater-Builder] Looking for John Holland...
I know a John Holland. Where was he from and where did he work? Steve / K6SCA --- On Mon, 6/22/09, Mark n9...@ameritech.net wrote: From: Mark n9...@ameritech.net Subject: [Repeater-Builder] Looking for John Holland... To: Repeater-Builder@yahoogroups.com Date: Monday, June 22, 2009, 6:47 PM I am trying to reach out for John Holland... we communicated a couple of months back regarding some Newbridge MainStreet 3624 units I am trying to program. John, Can you reach out for me via private email again? You email is bouncing. Thanks to the moderators for the bandwidth. Mark - N9WYS n9wys (at) ameritech (dot) net
Re: [Repeater-Builder] Re: LC (Link Communications
I am closing one of my repeater systems and have a LC Repeater Controler also a LC Digital Voice recorder...[snip] Are there operation manuals or maintenance manuals for the controller and voter available on the web? Select the controller type at http://www.link-comm.com/page.php?cid=2, then click the Support link on the right and it should take you to a page where you can find manuals for that controller. If you don't find what you are looking for there, you might be able to find it in the file archive at http://www.link-comm.com/ftp. Or email me and I will be glad to help. John Steve --- Steve Strobel Link Communications, Inc. 1035 Cerise Rd Billings, MT 59101-7378 (406) 245-5002 ext 102 (406) 245-4889 (fax) WWW: http://www.link-comm.com MailTo:steve.stro...@link-comm.com
Re: [Repeater-Builder] Re: Need tips for repeater performance
Adding to what Eric has said, ldf4-50 (and ldf5-50) can be had cheaply, cheaper than new lmr-400. Keep your eyes open and you'll find stuff. I went on a scavenging spree for my VHF weak-signal stuff; the best deal I got was 65 feet of LDF5-50 for $50. Next spring when I unrolled it, it was 130 feet, making for about .38 a foot. That was a great deal, with ldf5-50 more normally going for $1 - $2 a foot. LDF4-50 is cheaper yet, at about $1 a foot when you find a good price. Connectors for ldf4-50 were about $8 from a couple of folks in the flea market at Dayton, so with a little digging you can find those, too. --STeve Andre' wb8wsf en82 On Wednesday 17 June 2009 21:34:42 Eric Lemmon wrote: Aisen, Changing the RG-8 to LMR400 will reduce the feedline loss by about 0.8 dB, which is a small improvement, but LMR400 is known to cause major problems in duplex service. RG-8 will have about 2.2 dB loss in 50 feet, and LMR400 will have about 1.4 dB loss, at 458 MHz. A far better choice would be Andrew LDF4.5 Heliax with 0.5 dB loss, or LDF5 with 0.4 dB loss. Lose the RG-58 jumpers, and replace them with good, double-shielded cable such as RG-400 or RG-214. These jumpers should be fabricated with the proper high-quality connectors on each end (no barrels or adapters), and should be no longer than necessary. What is the make and model of your duplexer, and of your antenna? 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of aisendwight Sent: Wednesday, June 17, 2009 6:11 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Need tips for repeater performance --- In Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com , NORM KNAPP nkn...@... Well, I guess this is called A rookie decision!!!. Sorry, it's been like 18 years since I had any contact with radio stuff (back in my days as WP4MPS) now I'm back at the commercial level and I see I've had a bad start (yeez) Well., I'll have to find some use for that cable. Ok, keep it coming please... wrote: BATTLE STATIONS!! RED ALERT!! We got LMR-400 here! - Original Message - From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: repeater-builder@yahoogroups.com mailto:repeater-builder%40yahoogroups.com repeater-builder@yahoogroups.com mailto:repeater-builder%40yahoogroups.com Sent: Wed Jun 17 19:41:18 2009 Subject: [Repeater-Builder] Need tips for repeater performance Hello everybody: I'm into increasing the performance of my repeater. I've already ordered 50 Ft. of LMR-400 to replace the cheap RG-8. Yet, I wonder if there is something else I could do. The Duplexer is pre tuned to my freq. (458.0 repeater RX / 453.0 repeater TX). The duplexer is connected to the radios (my repeater is built out of two Motorola M120's) using RG-58 jumpers of about 24 inches long. Could that be affecting performance? When I check the TX power thru the duplexer I'm getting about 10W yet the TX radio is programmed for 30W. I know that I'll lose some power with the duplexer, but seems to me that I'm losing too much. SWR won't go below 2.1 no matter how much I adjust the antenna bays. So, what could be done? I imagine that swapping the RG-8 for the LMR-400 will help but I still wonder if that would be enough. Any help will be greatly appreciated. Aisen
Re: [Repeater-Builder] VHF RX Splitter Needed
Kris, I take it you've never seen what an impedance imbalance does to the notch depth of a BpBr duplexer. It's not a pretty site. Steve Allred / K6SCA RF System Design Engineer / CET Delta Wireless Surveillance Solutions --- On Thu, 6/11/09, Kris Kirby k...@catonic.us wrote: From: Kris Kirby k...@catonic.us Subject: Re: [Repeater-Builder] VHF RX Splitter Needed To: Repeater-Builder@yahoogroups.com Date: Thursday, June 11, 2009, 3:51 PM On Thu, 11 Jun 2009, Steve Allred wrote: The impedance of a CATV amp / splitter is 75 ohms, plus they usually have a higher noise floor. When was the last time you saw a receiver that actually had a 50-ohm input impedance? No, I don't mean the connector or the coax leading into the receiver. -- Kris Kirby, KE4AHR Disinformation Analyst
Re: [Repeater-Builder] VHF RX Splitter Needed
The impedance of a CATV amp / splitter is 75 ohms, plus they usually have a higher noise floor. Steve / K6SCA --- On Thu, 6/11/09, Kris Kirby k...@catonic.us wrote: From: Kris Kirby k...@catonic.us Subject: Re: [Repeater-Builder] VHF RX Splitter Needed To: Repeater-Builder@yahoogroups.com Date: Thursday, June 11, 2009, 3:03 AM On Wed, 10 Jun 2009, Com-Rad Inc wrote: Looking for a VHF antenna splitter 2 or 4 port ( internal amp ) Similar or identiacl to M/A Com[nc3=3] RC-150-4 Could use 2 of these Ed Folta K9QPJ Use a cable-TV amp and a hybrid/splitter. -- Kris Kirby, KE4AHR Disinformation Analyst
Re: [Repeater-Builder] Voter Question
The Doug Hall is a very good piece of equipment, but for the money so is the LDG. If you want a 2 channel voter, build the one the was published in QST, the LDG is based off of it's design. 73, Steve / K6SCA --- On Mon, 6/8/09, John Transue jtran...@cox.net wrote: From: John Transue jtran...@cox.net Subject: [Repeater-Builder] Voter Question To: Repeater-Builder@yahoogroups.com Date: Monday, June 8, 2009, 4:53 PM I need a voter for two receivers. The LDG voter does up to eight receivers, and I like it, but it costs over $300. Does anyone make a voter that is less expensive? I don’t have a price for Doug Hill but his equipment looks like major overkill, and I expect it is even more expensive than the LDG voter. John
Re: [Repeater-Builder] Six-Meter Isolator Circulator
Hi Dan, The phrases reasonably priced isolator for 6 meters are usually mutually exclusive. A isolator tuned for the 6 meter ham band is VERY expensive. Not to rain on Gareth's parade, but a 47 MHz low-band isolator will almost never tune to the repeater portion of 6 meters, I've tried several. The problem comes from the fact that due to the frequency involved, the components of an low-band isolator in order to be packaged into something reasonable, are limited to a very small tuning range. Take that same size physical package and put the required components into it for UHF and it will tune from 440 to 470 MHZ with no problem. 73, Steve / K6SCA --- On Mon, 6/8/09, Gareth Bennett (Ihug) gare...@es.co.nz wrote: From: Gareth Bennett (Ihug) gare...@es.co.nz Subject: Re: [Repeater-Builder] Six-Meter Isolator Circulator To: Repeater-Builder@yahoogroups.com Date: Monday, June 8, 2009, 4:34 PM Hi Dan, Have a look at this link, exactly what you are after?? http://www.trademe. co.nz/Electronic s-photography/ Radio-equipment/ Commercial/ auction-22325231 0.htm Regards Gareth Bennett (Technical Services) Signals NZ Ltd 8 Manor Place P.O. Box 1439 Dunedin 9015 New Zealand Phone : 03 477-4342 (64 3 477-4342) Fax : 03 474-5251 (64 3 474-5251) Mobile : 027 458-8377 (64 27 458-8377) Email : gare...@signals. net.nz Web : www.signals. net.nz Note: This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and any copies of it from your system, and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. LFT Group Ltd reserves the right to monitor ALL e-mail communications through its networks. Any views expressed in this message are those of the individual sender, except where the message states otherwise and the sender is authorised - Original Message - From: Dan To: Repeater-Builder@ yahoogroups. com Sent: Monday, June 08, 2009 3:35 PM Subject: [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] 220 repeater for sale
I have a SEA ESP 1000 ACSB 200-220 MHz self contained repeater with operating manual for sale. As I understand this is a data repeater. It can be converted to the Ham bands according to some of the posts I've read on this group posts. I would like $250 +shipping ($30) for it. Thanks Steve-W9YZU
[Repeater-Builder] Looking for a HRE6012B Preamp Module for a Motorola Astro Spectra
Hi All , Does anyone have any HRE6012B Preamp Modules around for the Astro Spectra Mobiles ? Please Let me know . Thank You . Steve efj44.
Re: [Repeater-Builder] Re:Dayton
Adam, I'm a volunteer at the inside exhibits. Things were definitely better this year than last, and its recognized that there is still lots of room for improvement, especially in the flea market. Our ham club had problems getting flea market spots so I know of that pain, dealing with it personally. There were problems with the professional group too. Different, but still problems. The good news is that things are getting better. I'm convinced of that, having walked the floor Thursday evening and having talked with nearly every vendor in the east and north halls. Very few problems, and I was able to fix three of them myself by calling others. Not bad. --STeve Andre' wb8wsf en82 On Monday 18 May 2009 06:57:45 Adam T. Cately wrote: Maybe one of the members of DARA reads this list... Years ago, when the club farmed out the running of the Hamvention to a real business that new what to do, it was nice to have your vendor packet in the mail by January, so that you could make your plans way in advance and have all of your ducks in a row - the flea market was well- organized and the help was there (and also the policing!) Since the club has taken over the duties, they have been very lax as to actual hamfest service, as I truly believe that THEY think we all will show up anyway, no matter WHAT level of service they give. I haven't been there as a vendor since then, and I don't think I'll go back as a vendor until they change their attitude... (...READ - Don't hold your breath...) At 11:44 PM 5/17/09 -0400, you wrote: That said, this year was MUCH better than last year. Still, I hope there are many more improvements next year. Hint: Start planning it NOW and start putting anything needed for then together NOW. Joe M. Paul Dumdie wrote: The folks that run the flea market spaces need to work harder on getting things sent out in a timely manor. Yahoo! Groups Links - Adam -
