[Repeater-Builder] Re: MSR 2000 Repeater
--- In Repeater-Builder@yahoogroups.com, skipp025 skipp...@... wrote: When you remove the PL Module from the back plane you lose the reverse burst CTCSS (PL) function. What advantage would you have/get from using a TS-32 tone board? You can download the external controller on an MSR-2000 repeater information from the www.radiowrench.com/sonic web page and it will tell you how to make the repeater operate carrier squelch. First off... there are two jumpers on the Squelch Gate Module that need to be moved over to carrier squelch or the TS-32 needs to source the proper signals to the SQM so it will operate. s. Howard Klino hklino@ wrote: I have gotten a MSR2000 repeater working with the the PL card in it.I do not want to use this card as I have installed a TS-32 board. When I remove the PL card, both transmit and receive are disabled. What do I jumper to stop this from happening. It blocks me from using the meter jack for the transmitter. Howard K2IMO First let me say that the unit was not originally a repeater. It was a base station on EMS freqs. It did not have a squelch card in it. I did another conversion to it that required a TS-32 or TS-64 so I put it in. I wanred both incode and decod capabilities. It has a CAT controller mounted where the second receiver should be. Everything works great and has for over a year. Now back to the original question. In order to use the metering socket for tune-up of the transmitter, you have to trmove the PL card which is mounted just below the transmitter. When doing this, you lose transmit capabilities and receive. Once you plug in the test meter, you can no longer put the PL card back in. What I need to know is what lumpers do I have to put in inorder to be able to transmit and receive with the PL card removed. I have no documentation on the boards. Howard K2IMO
Re: [Repeater-Builder] a strange unexplainable desense issue
Hey Jed, You are leaving out a key piece of information. Your antennas are at the same height and almost next to each other causing a mixing problem that I explained to you. The problem will not go away until the antennas are separated. You proved this by killing each transmitter separately and the problem goes away. If you look on a spectrum analyzer when both machines are keyed you will see the mix. When I talked to you on the phone about this problem I gave you the mixed frequency to look for on 220. When the machines left the factory they were both on frequency and checked with 2 different IFR's that were recently calibrated. Even if the machines were off by not even 1kc it would not cause this problem. I think since you said both are off by about the same amount you might want to look at what ever your using to measure them. Paul Maggiore V.P. AA3VI Maggiore Electronic Lab (HiPro) Best Weight Loss Program - Click Here! http://thirdpartyoffers.juno.com/TGL2141/fc/BLSrjpTFoYdQPLtnbksoClURHCwdUYQowpN4jCEaG6izKUkjb0Vua2cjHva/
RE: [Repeater-Builder] a strange unexplainable desense issue
actually the problem did not go away. We tested it yesterday with UHF completely off, and 220 just kep making tons of noise. In fact, UHF plays fine stand alone, i had to turn 220 off when we left the sight. Any ideas? I think this is more of an issue of something getting in to the input of 220. Even stand alone without UHF even turned on, it's an issue. Thoughts? -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of repeat...@juno.com Sent: Sunday, September 20, 2009 10:19 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] a strange unexplainable desense issue Hey Jed, You are leaving out a key piece of information. Your antennas are at the same height and almost next to each other causing a mixing problem that I explained to you. The problem will not go away until the antennas are separated. You proved this by killing each transmitter separately and the problem goes away. If you look on a spectrum analyzer when both machines are keyed you will see the mix. When I talked to you on the phone about this problem I gave you the mixed frequency to look for on 220. When the machines left the factory they were both on frequency and checked with 2 different IFR's that were recently calibrated. Even if the machines were off by not even 1kc it would not cause this problem. I think since you said both are off by about the same amount you might want to look at what ever your using to measure them. Paul Maggiore V.P. AA3VI Maggiore Electronic Lab (HiPro) Best Weight Loss Program - Click Here! http://thirdpartyoffers.juno.com/TGL2142/fc/BLSrjpTFoYdQPLtnbksoClURHCwdUYQ owpN4jCEaG6izKUkjb0Vua2cjHva/
RE: [Repeater-Builder] UHF Duplexers
You should be tuning the bandpass for maximum return loss, not least insertion loss. I've found that older Wacom duplexers develop center plunger contact problems as they age. I trashed quite a few 900 MHz duplexers and combiner cavities because the insertion loss was intermittantly high; the poor center plunger contact was very obvious when tuning them - they were scratchy and it was very obvious when the trace on the VNA while adjusting the tuning rod. I guess you've checked the obvious - look for a bad connector in the harness. --- Jeff WN3A -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of terry dalpoas Sent: Saturday, September 19, 2009 8:58 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] UHF Duplexers Eric, The repeater is 70cm amateur (444.625 TX/449.625 RX). These duplexers have been used on this same repeater for I'd say 10-13 years. I was given the repeater by the previous owner because the site was lost and he did not have time to repair the problems that did show up (the PA went out). I had a mobile PA that I turned down and used it and ran the repeater from my house for a few months (ran fine), then disconnected it. It sat in my shop from Oct 2008 until around 1 month ago. It was not as before. I wound up basically rebuilding the receiver, and I rebuilt the original PA. However, this year in Oklahoma, we did get a lot of rain and it did get pretty warm in my shop (along with high humidity. I wonder if the heat and humidity might have done something to the duplexers. I do have another set of these that were on the link transciever (the link was set up to run full duplex as well), I may retune them to see what I have. Equipment and tuning method. Here is what I was taught how to do it. I use an IFR 1200S service monitor, and the only spare radio I have at the moment is an Icom T7H HT. I start with RX (449.625) first. I connect the IFR to the antenna port, a reciever on the RX port (high pass), and a dummy load one the TX (low pass). I adjust RX pass freq for best SINAD. I then change the receiver and IFR to the TX freq and adjust for the best rejection, or worst SINAD. I do the TX (444.625) side the same way, best SINAD TX pass, worst SINAD RX reject. I tuned a set of duplexers this way before on a 2m repeater using 6 cavity Sinclair BpBr with no problems, this is the first I have messed with a set of Wacom's. Terry KM5UQ From: Eric Lemmon wb6...@verizon.net To: Repeater-Builder@yahoogroups.com Sent: Saturday, September 19, 2009 6:30:57 PM Subject: RE: [Repeater-Builder] UHF Duplexers Terry, Is your repeater in the 70cm Amateur band? If so, and your WP-678 duplexer was not originally tuned for that band, that may be where the problem lies. I have a Remec-Wacom WP-678 duplexer that I bought from the factory for GMRS service, and its insertion loss at the transmit frequency is 1.14 dB, equivalent to 38.5 watts out for 50 watts in. Your duplexer's measured insertion loss exceeds 4 dB. Most Wacom UHF commercial-band duplexers will tune down into the Amateur band, but not all of them. It appears that your duplexer is tuned improperly, or it may be impossible to tune it to your pair. What method and equipment are you using to tune the duplexer? 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@ yahoogroups. com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@ yahoogroups. com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of terry dalpoas Sent: Saturday, September 19, 2009 2:11 PM To: Repeater-Builder@ yahoogroups. com mailto:Repeater-Builder%40yahoogroups.com Subject: [Repeater-Builder] UHF Duplexers Just about finished with the Mastr II UHF repeater. I've run into a problem with the duplexers. They are a set of WACOM BpBr Model WP678. I am putting 48W into them, but only 18.5W out. I believe this should be better. RX will open squelch at around .2-.3 uV through the cans (this I know is OK). Could there be a problem with the TX side of the cans? Terry KM5UQ No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.409 / Virus Database: 270.13.78/2347 - Release Date: 09/20/09 06:22:00
RE: [Repeater-Builder] a strange unexplainable desense issue
Beyond just turning off the other repeaters, try terminating their antenna feedlines with a dummy load instead of leaving them connected to the equipment. See if that makes any difference. -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jed Barton Sent: Sunday, September 20, 2009 10:59 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] a strange unexplainable desense issue actually the problem did not go away. We tested it yesterday with UHF completely off, and 220 just kep making tons of noise. In fact, UHF plays fine stand alone, i had to turn 220 off when we left the sight. Any ideas? I think this is more of an issue of something getting in to the input of 220. Even stand alone without UHF even turned on, it's an issue. Thoughts? -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of repeat...@juno.com mailto:repeaters%40juno.com Sent: Sunday, September 20, 2009 10:19 AM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: Re: [Repeater-Builder] a strange unexplainable desense issue Hey Jed, You are leaving out a key piece of information. Your antennas are at the same height and almost next to each other causing a mixing problem that I explained to you. The problem will not go away until the antennas are separated. You proved this by killing each transmitter separately and the problem goes away. If you look on a spectrum analyzer when both machines are keyed you will see the mix. When I talked to you on the phone about this problem I gave you the mixed frequency to look for on 220. When the machines left the factory they were both on frequency and checked with 2 different IFR's that were recently calibrated. Even if the machines were off by not even 1kc it would not cause this problem. I think since you said both are off by about the same amount you might want to look at what ever your using to measure them. Paul Maggiore V.P. AA3VI Maggiore Electronic Lab (HiPro) __ Best Weight Loss Program - Click Here! http://thirdpartyoffers.juno.com/TGL2142/fc/BLSrjpTFoYdQPLtnb ksoClURHCwdUYQ http://thirdpartyoffers.juno.com/TGL2142/fc/BLSrjpTFoYdQPLtnb ksoClURHCwdUYQ owpN4jCEaG6izKUkjb0Vua2cjHva/ No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.409 / Virus Database: 270.13.78/2347 - Release Date: 09/20/09 06:22:00
[Repeater-Builder] Re: MSR 2000 Base to Repeater Conversion
icomman1104 hkl...@... wrote: First let me say that the unit was not originally a repeater. It was a base station on EMS freqs. It did not have a squelch card in it. Ahhh... now we get the rest of the story. Yes, the MSR-2000 Base can be converted for duplex repeat operation. It's much easier if you have the duplex back plane, which is the one with the PL and R1-Audio Modules laying horizontal above the main module slots. But the MSR-2000 like the Micor was optioned from the factory to operate one of many possible ways and that requires jumpers and certain sequence of modules come into play. If your now repeater was a base station (first), you need to ensure a number of logic functions reach the exciter (and receiver) to operate. The base station originally keyed into transmit using tone or DC and there are modules in card cage that provide channel element (crystal holder) ground in transmit mode, which in your case is probably lead through the PL Module on the way to the exciter. In repeater operation the Squelch Gate Module provides the channel element ground. First: You need to go onto the receiver and exciter board and jumper the channel elements to full time on (enabled). You need to find the two proper manuals to service the unit, one being just for the Modules in the back plane and the other the RF and specific Hardware Manual for the VHF Unit (or UHF unit if you have one on 450MHz). In the case of the Manual for the Modules, the Micor book will sub for some things (but not all). You need to make a choice... are you going with the back plane direct connection to your external device (ham or commercial controller) or are you going with the Squelch Gate Module interface method? I would assume your PL Module is half duplex (normal for a base station). You'll notice it is the same PC-Board as the full duplex version, less the parts. You can populate the board up to a full duplex version by using the chip from a normal Mitrek Mobile PL Deck. Although the manual says they are different part numbers, they are the same chip and I've made many a duplex PL Module from half duplex units. Another trick I've seen is to stack the TS-32 right onto the PL Module, often using a small sheet of aluminum with stand-off spacers. If you're willing to put the serious time into a proper conversion... (without giving up), we're able to try and help you sort through the process. If someone sold you a Micor Repeater Squelch Gate Module, you could simply change the end pins to the MSR type using the parts from a spare card and you'd have a working SQM, same as the original MSR type without the Ebay price hike. If you're patient to shop around on Ebay and ask various people here on the group for help... you would eventually find all the parts you need to rock and roll your base station into full repeater operation. But I also just read where you've got it working with a CAT Controller and you need/want the metering socket. That doesn't make much sense as you can meter both the exciter and receiver from metering ports on the back plane with it tilted down (as designed) for service. The original PL Module does not interfere with the exciter metering as built. s. I did another conversion to it that required a TS-32 or TS-64 so I put it in. I wanred both incode and decod capabilities. It has a CAT controller mounted where the second receiver should be. Everything works great and has for over a year. Now back to the original question. In order to use the metering socket for tune-up of the transmitter, you have to trmove the PL card which is mounted just below the transmitter. When doing this, you lose transmit capabilities and receive. Once you plug in the test meter, you can no longer put the PL card back in. What I need to know is what lumpers do I have to put in inorder to be able to transmit and receive with the PL card removed. I have no documentation on the boards. Howard K2IMO --- In Repeater-Builder@yahoogroups.com, skipp025 skipp025@ wrote: When you remove the PL Module from the back plane you lose the reverse burst CTCSS (PL) function. What advantage would you have/get from using a TS-32 tone board? You can download the external controller on an MSR-2000 repeater information from the www.radiowrench.com/sonic web page and it will tell you how to make the repeater operate carrier squelch. First off... there are two jumpers on the Squelch Gate Module that need to be moved over to carrier squelch or the TS-32 needs to source the proper signals to the SQM so it will operate. s. Howard Klino hklino@ wrote: I have gotten a MSR2000 repeater working with the the PL card in it.I do not want to use this card as I have installed a TS-32 board. When I remove the PL card, both transmit and receive are disabled. What do I jumper to stop this
RE: [Repeater-Builder] a strange unexplainable desense issue
At 07:58 AM 9/20/2009, Jed Barton wrote: actually the problem did not go away. We tested it yesterday with UHF completely off, and 220 just kep making tons of noise. In fact, UHF plays fine stand alone, i had to turn 220 off when we left the sight. Any ideas? I think this is more of an issue of something getting in to the input of 220. Even stand alone without UHF even turned on, it's an issue. Jed, you REALLY need to run an intermod program to have a look at the possible products created. In addition, it is not necessary for a transmitter to actually be active in order to create intermodulation products. Hell, it doesn't even need to be powered! Find out if the other transmitters at your site use isolators. And you might want to consider adding some to YOUR equipment as well. That will, at least, eliminate non-linear generation (intermod) of products in YOUR equipment 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!
[Repeater-Builder] Re: Aerotron VHF rpt.
I replied to your post below over on the Aerotron Group... s. Joe k1ike_m...@... wrote: Our club has had an Aerotron MPAC VHF repeater on 145.29Mhz for many years and it has worked well. It was ordered from Aerotron for our specific frequency. It it is serving us well. The main problem that we have had is the PA stage burning up. It does not like to do 100 watts in ham use. Ham use can be more taxing than commercial use, especially during long nets or events. We solved this problem by turning the PA down to about 60 watts. The problem was that heat would delaminate the traces from the PA circuit board. I just bought an Aerotron MPAC manual off eBay for less than $10.00 including shipping, so look around. I also just bought another Aerotron VHF MPAC off eBay and am waiting for it to arrive. By coincidence, it is on 146.775 and that is the frequency of our other club repeater. I'll be retiring the Spectrum Communications SCR-77 repeater we now use on that frequency and use Aerotron MPAC repeaters on both frequencies. I have a ratty MPAC for spare parts, but most of the parts in the MPAC are generic off-the-shelf stuff. My friend who has a 2way shop has a fleet of Aerotron stuff still on the air, so he is a good resource for help. 73, Joe, K1ike terry_wx3m wrote: I know there is an Aerotron group, but it hasn't had any activity for a long time. I thought I might get an answer here. I have a mint Aerotron VHF Repeater made of a 60BR1 Receiver and a 60BT100 Transmitter. Has anyone ever seen one of these successfully moved to a lower ham pair such as 145.450/144.850? I'd also consider buying spare manuals if anyone has them. Thanks, Terry WX3M wx3m.te...@... 301-707-3412
RE: [Repeater-Builder] a strange unexplainable desense issue
we have not tested that yet, that is our next test. -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Phil Hebert Sent: Saturday, September 19, 2009 8:39 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] a strange unexplainable desense issue Disconnect the antenna at the duplexer and replace with a dummy load. Does the problem still exist ?
Re: [Repeater-Builder] UHF Duplexers
Jeff, Best I can tell the connecting harness is good. I may try the set meant for the link radio and see what they do. How do I tune for maximum return loss? If it is better, you can contact me off the group, so it does not get tied up. Terry KM5UQ From: Jeff DePolo j...@broadsci.com To: Repeater-Builder@yahoogroups.com Sent: Sunday, September 20, 2009 10:16:59 AM Subject: RE: [Repeater-Builder] UHF Duplexers You should be tuning the bandpass for maximum return loss, not least insertion loss. I've found that older Wacom duplexers develop center plunger contact problems as they age. I trashed quite a few 900 MHz duplexers and combiner cavities because the insertion loss was intermittantly high; the poor center plunger contact was very obvious when tuning them - they were scratchy and it was very obvious when the trace on the VNA while adjusting the tuning rod. I guess you've checked the obvious - look for a bad connector in the harness. --- Jeff WN3A -Original Message- From: Repeater-Builder@ yahoogroups. com [mailto:Repeater-Builder@ yahoogroups. com] On Behalf Of terry dalpoas Sent: Saturday, September 19, 2009 8:58 PM To: Repeater-Builder@ yahoogroups. com Subject: Re: [Repeater-Builder] UHF Duplexers Eric, The repeater is 70cm amateur (444.625 TX/449.625 RX). These duplexers have been used on this same repeater for I'd say 10-13 years. I was given the repeater by the previous owner because the site was lost and he did not have time to repair the problems that did show up (the PA went out). I had a mobile PA that I turned down and used it and ran the repeater from my house for a few months (ran fine), then disconnected it. It sat in my shop from Oct 2008 until around 1 month ago. It was not as before. I wound up basically rebuilding the receiver, and I rebuilt the original PA. However, this year in Oklahoma, we did get a lot of rain and it did get pretty warm in my shop (along with high humidity. I wonder if the heat and humidity might have done something to the duplexers. I do have another set of these that were on the link transciever (the link was set up to run full duplex as well), I may retune them to see what I have. Equipment and tuning method. Here is what I was taught how to do it. I use an IFR 1200S service monitor, and the only spare radio I have at the moment is an Icom T7H HT. I start with RX (449.625) first. I connect the IFR to the antenna port, a reciever on the RX port (high pass), and a dummy load one the TX (low pass). I adjust RX pass freq for best SINAD. I then change the receiver and IFR to the TX freq and adjust for the best rejection, or worst SINAD. I do the TX (444.625) side the same way, best SINAD TX pass, worst SINAD RX reject. I tuned a set of duplexers this way before on a 2m repeater using 6 cavity Sinclair BpBr with no problems, this is the first I have messed with a set of Wacom's. Terry KM5UQ _ _ __ From: Eric Lemmon wb6...@verizon. net To: Repeater-Builder@ yahoogroups. com Sent: Saturday, September 19, 2009 6:30:57 PM Subject: RE: [Repeater-Builder] UHF Duplexers Terry, Is your repeater in the 70cm Amateur band? If so, and your WP-678 duplexer was not originally tuned for that band, that may be where the problem lies. I have a Remec-Wacom WP-678 duplexer that I bought from the factory for GMRS service, and its insertion loss at the transmit frequency is 1.14 dB, equivalent to 38.5 watts out for 50 watts in. Your duplexer's measured insertion loss exceeds 4 dB. Most Wacom UHF commercial-band duplexers will tune down into the Amateur band, but not all of them. It appears that your duplexer is tuned improperly, or it may be impossible to tune it to your pair. What method and equipment are you using to tune the duplexer? 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@ yahoogroups. com mailto:Repeater- Builder%40yahoog roups.com [mailto:Repeater- Builder@ yahoogroups. com mailto:Repeater- Builder%40yahoog roups.com ] On Behalf Of terry dalpoas Sent: Saturday, September 19, 2009 2:11 PM To: Repeater-Builder@ yahoogroups. com mailto:Repeater- Builder%40yahoog roups.com Subject: [Repeater-Builder] UHF Duplexers Just about finished with the Mastr II UHF repeater. I've run into a problem with the duplexers. They are a set of WACOM BpBr Model WP678. I am putting 48W into them, but only 18.5W out. I believe this should be better. RX will open squelch at around .2-.3 uV through the cans (this I know is OK). Could there be a problem with the TX side of the cans? Terry KM5UQ No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.409 / Virus Database: 270.13.78/2347 - Release Date: 09/20/09 06:22:00
RE: [Repeater-Builder] UHF Duplexers
Terry, I understand and appreciate the fact that you are forced to employ a makeshift procedure for duplexer alignment, since you do not have the proper equipment (spectrum analyzer with a tracking generator, or the best choice- vector network analyzer, aka VNA). While it is very true that one can get fairly close with a handheld radio as a detector, close is not always close enough. The most obvious problem when using a handheld radio is that the antenna connection on a handheld is very seldom optimized at 50 ohms. Even if the rubber duck antenna has a BNC connector on it, one cannot assume that the radio's source and load impedances are even close to 50 ohms. Since a rubber duck antenna is usually nothing close to 50 ohms, the radio-side impedance is more likely whatever will be close to matching the antenna. I found this out the hard way, when both of my Icom IC-2AT handhelds (remember them?) suffered blown final transistors when I used them on a roof-mounted quarter-wave whip on my car. My mobile antenna was carefully tuned to be close to 50 ohms, but the handheld radios were not a good match, and the finals blew. Most commercial portables- the Motorola HT1250 is a good example- must use a special BNC adapter to convert the normal antenna matching circuit to 50 ohms for use in bench testing or to connect an external antenna. So, I suspect that your tuning method is resulting in a mis-tuned duplexer that does not properly match your repeater. If you possibly can find a shop that has a VNA, pay to have it tuned precisely to your repeater pair, and do not touch any of the adjustments afterwards. The next best choice is a shop that has a good spectrum analyzer with tracking generator, and used with a return-loss bridge. The benefit of a VNA or an RLB is that the tuning of the bandpass function for the best return loss is far more sensitive and precise than tuning for minimum insertion loss. The return (reflection) loss is seen as an extremely sharp spike or notch, while the transmission loss is just a broad curve. Too, a VNA has precise 50 ohm matches on all ports. Once you've used a VNA to tune for return loss, you'll wonder how you ever managed without it. No matter what laboratory instrument was used to tune your duplexer, try to avoid the temptation to tweak it once it is installed. In every instance of which I am personally aware, the careful shop tuning of a duplexer was negated when a diddle-stick artist could not resist the temptation to improve the tuning at the site. But, I digress... If you have checked all of the connectors, jumpers, and feedline for problems and found none, I still believe that your duplexer is not tuned correctly. Since you state that the duplexer in question was used on the repeater for more than a decade with no problems, and presumably on the same frequency pair, why are you re-tuning it? You probably have heard the old saying: If it ain't broke... 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of terry dalpoas Sent: Saturday, September 19, 2009 5:58 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] UHF Duplexers Eric, The repeater is 70cm amateur (444.625 TX/449.625 RX). These duplexers have been used on this same repeater for I'd say 10-13 years. I was given the repeater by the previous owner because the site was lost and he did not have time to repair the problems that did show up (the PA went out). I had a mobile PA that I turned down and used it and ran the repeater from my house for a few months (ran fine), then disconnected it. It sat in my shop from Oct 2008 until around 1 month ago. It was not as before. I wound up basically rebuilding the receiver, and I rebuilt the original PA. However, this year in Oklahoma, we did get a lot of rain and it did get pretty warm in my shop (along with high humidity. I wonder if the heat and humidity might have done something to the duplexers. I do have another set of these that were on the link transceiver (the link was set up to run full duplex as well), I may retune them to see what I have. Equipment and tuning method. Here is what I was taught how to do it. I use an IFR 1200S service monitor, and the only spare radio I have at the moment is an Icom T7H HT. I start with RX (449.625) first. I connect the IFR to the antenna port, a receiver on the RX port (high pass), and a dummy load one the TX (low pass). I adjust RX pass freq for best SINAD. I then change the receiver and IFR to the TX freq and adjust for the best rejection, or worst SINAD. I do the TX (444.625) side the same way, best SINAD TX pass, worst SINAD RX reject. I tuned a set of duplexers this way before on a 2m repeater using 6 cavity Sinclair BpBr with no problems, this is the first I have messed with a set of Wacom's. Terry KM5UQ From: Eric Lemmon
Re: [Repeater-Builder] UHF Duplexers
Eric, I did find my old Icom IC-2710 dual band mobile last night. Would that be okay to use instead of the HT? The only reason I thought the duplexer needed to be tuned was after we got it loaded in the truck, some stuff shifted (rough mountain road), I thought that they may have gotten bumped. I am not sure how durable duplexers are, but I have heard sometimes the slightest shock can mistune them, and I discovered the tuning rods were not locked in place. I do hate to sound like a dummy on these things and sorry to keep bugging you on it. Last repeater and duplexer I messed with was in 2002 (at the age of 22 before I was married and had a kid, and was my first repeater), and am relearning this stuff. The one I am working on now is my first 70cm. I was told these things are addictive, and I like the challenge (not the headaches, though). Terry, KM5UQ From: Eric Lemmon wb6...@verizon.net To: Repeater-Builder@yahoogroups.com Sent: Sunday, September 20, 2009 11:25:03 AM Subject: RE: [Repeater-Builder] UHF Duplexers Terry, I understand and appreciate the fact that you are forced to employ a makeshift procedure for duplexer alignment, since you do not have the proper equipment (spectrum analyzer with a tracking generator, or the best choice- vector network analyzer, aka VNA). While it is very true that one can get fairly close with a handheld radio as a detector, close is not always close enough. The most obvious problem when using a handheld radio is that the antenna connection on a handheld is very seldom optimized at 50 ohms. Even if the rubber duck antenna has a BNC connector on it, one cannot assume that the radio's source and load impedances are even close to 50 ohms. Since a rubber duck antenna is usually nothing close to 50 ohms, the radio-side impedance is more likely whatever will be close to matching the antenna. I found this out the hard way, when both of my Icom IC-2AT handhelds (remember them?) suffered blown final transistors when I used them on a roof-mounted quarter-wave whip on my car. My mobile antenna was carefully tuned to be close to 50 ohms, but the handheld radios were not a good match, and the finals blew. Most commercial portables- the Motorola HT1250 is a good example- must use a special BNC adapter to convert the normal antenna matching circuit to 50 ohms for use in bench testing or to connect an external antenna. So, I suspect that your tuning method is resulting in a mis-tuned duplexer that does not properly match your repeater. If you possibly can find a shop that has a VNA, pay to have it tuned precisely to your repeater pair, and do not touch any of the adjustments afterwards. The next best choice is a shop that has a good spectrum analyzer with tracking generator, and used with a return-loss bridge. The benefit of a VNA or an RLB is that the tuning of the bandpass function for the best return loss is far more sensitive and precise than tuning for minimum insertion loss. The return (reflection) loss is seen as an extremely sharp spike or notch, while the transmission loss is just a broad curve. Too, a VNA has precise 50 ohm matches on all ports. Once you've used a VNA to tune for return loss, you'll wonder how you ever managed without it. No matter what laboratory instrument was used to tune your duplexer, try to avoid the temptation to tweak it once it is installed. In every instance of which I am personally aware, the careful shop tuning of a duplexer was negated when a diddle-stick artist could not resist the temptation to improve the tuning at the site. But, I digress... If you have checked all of the connectors, jumpers, and feedline for problems and found none, I still believe that your duplexer is not tuned correctly. Since you state that the duplexer in question was used on the repeater for more than a decade with no problems, and presumably on the same frequency pair, why are you re-tuning it? You probably have heard the old saying: If it ain't broke... 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@ yahoogroups. com [mailto:Repeater-Builder@ yahoogroups. com] On Behalf Of terry dalpoas Sent: Saturday, September 19, 2009 5:58 PM To: Repeater-Builder@ yahoogroups. com Subject: Re: [Repeater-Builder] UHF Duplexers Eric, The repeater is 70cm amateur (444.625 TX/449.625 RX). These duplexers have been used on this same repeater for I'd say 10-13 years. I was given the repeater by the previous owner because the site was lost and he did not have time to repair the problems that did show up (the PA went out). I had a mobile PA that I turned down and used it and ran the repeater from my house for a few months (ran fine), then disconnected it. It sat in my shop from Oct 2008 until around 1 month ago. It was not as before. I wound up basically rebuilding the receiver, and I rebuilt the original PA. However, this year in Oklahoma, we did get a lot of rain and
[Repeater-Builder] EF Johnson 25A rack mount power Supply
I have an old EF Johnson 25A 14VDC rack mount power supply. The part number on it is 023-3341-012. The supply has a pigtail EFJ-style (male, female monster banana pin) receptacle on the power supply chassis and a freehanging one on a short cable. Can anyone provide a wiring diagram/schematic or at least enlighten me as to how the cable and chassis connectors are to be connected to a load? Thanks, Duane Fowler
RE: [Repeater-Builder] EF Johnson 25A rack mount power Supply
I don't know which repeater it came out of, but it was probably a CR1000 or CR1010. Here's the manual for a CR1010, should get you in the ballpark. http://efjohnson.com/PDF/manuals/CR1010Repeater-ServiceMan.pdf BTW, if anyone knows of a source of those mondo dual banana plugs that EFJ used, I could sure use a few... --- Jeff WN3A -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of lbd9992001 Sent: Sunday, September 20, 2009 12:57 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] EF Johnson 25A rack mount power Supply I have an old EF Johnson 25A 14VDC rack mount power supply. The part number on it is 023-3341-012. The supply has a pigtail EFJ-style (male, female monster banana pin) receptacle on the power supply chassis and a freehanging one on a short cable. Can anyone provide a wiring diagram/schematic or at least enlighten me as to how the cable and chassis connectors are to be connected to a load? Thanks, Duane Fowler No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.409 / Virus Database: 270.13.78/2347 - Release Date: 09/20/09 06:22:00
RE: [Repeater-Builder] UHF Duplexers
I think Eric's response covered it pretty well. Lacking the right equipment, tuning for return loss can't be done with a great deal of accury. The closest you could get using basic instruments would be to look at reflected power with a high-quality directional wattmeter (Bird 43) with the cavity terminated into a very good load (30 dB or better return loss), with the usual caveat not to tune while transmitting. In your situation, given that you're not sure whether you don't know if you have bad hardware or a tuning problem, I'd strongly recommend you find someone with a VNA to do it. If you can't find anyone locally, if you want to pay the shipping I'll do it for you. --- Jeff WN3A -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of terry dalpoas Sent: Sunday, September 20, 2009 12:02 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] UHF Duplexers Jeff, Best I can tell the connecting harness is good. I may try the set meant for the link radio and see what they do. How do I tune for maximum return loss? If it is better, you can contact me off the group, so it does not get tied up. Terry KM5UQ From: Jeff DePolo j...@broadsci.com To: Repeater-Builder@yahoogroups.com Sent: Sunday, September 20, 2009 10:16:59 AM Subject: RE: [Repeater-Builder] UHF Duplexers You should be tuning the bandpass for maximum return loss, not least insertion loss. I've found that older Wacom duplexers develop center plunger contact problems as they age. I trashed quite a few 900 MHz duplexers and combiner cavities because the insertion loss was intermittantly high; the poor center plunger contact was very obvious when tuning them - they were scratchy and it was very obvious when the trace on the VNA while adjusting the tuning rod. I guess you've checked the obvious - look for a bad connector in the harness. --- Jeff WN3A -Original Message- From: Repeater-Builder@ yahoogroups. com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@ yahoogroups. com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of terry dalpoas Sent: Saturday, September 19, 2009 8:58 PM To: Repeater-Builder@ yahoogroups. com mailto:Repeater-Builder%40yahoogroups.com Subject: Re: [Repeater-Builder] UHF Duplexers Eric, The repeater is 70cm amateur (444.625 TX/449.625 RX). These duplexers have been used on this same repeater for I'd say 10-13 years. I was given the repeater by the previous owner because the site was lost and he did not have time to repair the problems that did show up (the PA went out). I had a mobile PA that I turned down and used it and ran the repeater from my house for a few months (ran fine), then disconnected it. It sat in my shop from Oct 2008 until around 1 month ago. It was not as before. I wound up basically rebuilding the receiver, and I rebuilt the original PA. However, this year in Oklahoma, we did get a lot of rain and it did get pretty warm in my shop (along with high humidity. I wonder if the heat and humidity might have done something to the duplexers. I do have another set of these that were on the link transciever (the link was set up to run full duplex as well), I may retune them to see what I have. Equipment and tuning method. Here is what I was taught how to do it. I use an IFR 1200S service monitor, and the only spare radio I have at the moment is an Icom T7H HT. I start with RX (449.625) first. I connect the IFR to the antenna port, a reciever on the RX port (high pass), and a dummy load one the TX (low pass). I adjust RX pass freq for best SINAD. I then change the receiver and IFR to the TX freq and adjust for the best rejection, or worst SINAD. I do the TX (444.625) side the same way, best SINAD TX pass, worst SINAD RX reject. I tuned a set of duplexers this way before on a 2m repeater using 6 cavity Sinclair BpBr with no problems, this is the first I have messed with a set of Wacom's. Terry KM5UQ _ _ __ From: Eric Lemmon wb6...@verizon. net mailto:wb6fly%40verizon.net To: Repeater-Builder@ yahoogroups. com mailto:Repeater-Builder%40yahoogroups.com Sent: Saturday, September 19, 2009 6:30:57 PM Subject: RE: [Repeater-Builder] UHF Duplexers Terry, Is your repeater in the 70cm Amateur band? If so, and your WP-678 duplexer was not originally tuned for that band, that may be where the problem lies. I have a Remec-Wacom WP-678 duplexer that I bought from the factory for GMRS service, and its insertion loss at the transmit frequency is 1.14 dB, equivalent to 38.5 watts out for 50 watts in. Your duplexer's measured insertion loss exceeds 4 dB. Most
RE: [Repeater-Builder] UHF Duplexers
Terry, In lieu of the ideal bench equipment, yes, the IC-2710 is better than a handheld, since its impedances are supposed to be close to 50 ohms at the connector. You are to be commended for your creativity in making do with what you have. Since your duplexer has been moved from its original settings, you can only improve matters. Let's review your process: You generate your 449.625 MHz receive signal with the service monitor, and inject it into the duplexer's antenna connector, with your monitoring radio set to 449.625 MHz and connected to the RX (high pass) connector of the duplexer, and a 50-ohm dummy load on the TX (low pass) connector of the duplexer. The SINAD input of your service monitor is connected to the monitoring radio's speaker, and you adjust the center rods of the high-pass cans to get 12 dB SINAD with the lowest level signal at the RX connector. Next, without changing any of the connections, you set the service monitor to generate 444.625 MHz and program the monitoring radio to receive 444.625 MHz. With your service monitor generating the highest-level signal possible (at least 0 dBm, but higher is better), you adjust the notch capacitors on both high-pass cans to minimize the received signal. You might get better results by monitoring the RSSI voltage at the radio. Do not move the threaded tuning rods at all. Next, reverse the positions of the monitoring radio and the dummy load. The service monitor is still generating 444.625 MHz at a high level, so bring the output level down to about -100 dBm or so. While monitoring the SINAD meter adjust the center rods of the low-pass cans to achieve 12 dB SINAD with the lowest possible output of the service monitor. Finally, set both the service monitor and the monitoring radio to 449.625 MHz. Crank up the output level of the service monitor to maximum, and adjust the notch capacitors on both low-pass cans for a minimum receive signal. Again, you might need to meter the RSSI voltage as you tune the notch capacitors. Repeat all four steps above until there is no improvement, since there is always some interaction between the low-pass and high-pass sides, especially if significant changes are made to either side. The primary disadvantage of this simple procedure is that the output level of the service monitor may not be high enough to achieve a sufficient signal at the notch frequency to get the tuning exact. It is true that duplexer tuning can be affected by rough handling, especially if one of the cavities gets dented. However, a high-quality duplexer is seldom affected by temperature, because the center tuning rod is normally made of Invar- an alloy that minimizes sensitivity to temperature. Keep in mind that the shack temperature is not the only factor to consider; a typical six-cavity duplexer on a 250-watt repeater will be heated by the transmitted carrier due to insertion loss of 2.2 dB, amounting to about 100 watts lost inside the cavities. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of terry dalpoas Sent: Sunday, September 20, 2009 9:41 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] UHF Duplexers Eric, I did find my old Icom IC-2710 dual band mobile last night. Would that be okay to use instead of the HT? The only reason I thought the duplexer needed to be tuned was after we got it loaded in the truck, some stuff shifted (rough mountain road), I thought that they may have gotten bumped. I am not sure how durable duplexers are, but I have heard sometimes the slightest shock can mistune them, and I discovered the tuning rods were not locked in place. I do hate to sound like a dummy on these things and sorry to keep bugging you on it. Last repeater and duplexer I messed with was in 2002 (at the age of 22 before I was married and had a kid, and was my first repeater), and am relearning this stuff. The one I am working on now is my first 70cm. I was told these things are addictive, and I like the challenge (not the headaches, though). Terry, KM5UQ From: Eric Lemmon wb6...@verizon.net To: Repeater-Builder@yahoogroups.com Sent: Sunday, September 20, 2009 11:25:03 AM Subject: RE: [Repeater-Builder] UHF Duplexers Terry, I understand and appreciate the fact that you are forced to employ a makeshift procedure for duplexer alignment, since you do not have the proper equipment (spectrum analyzer with a tracking generator, or the best choice- vector network analyzer, aka VNA). While it is very true that one can get fairly close with a handheld radio as a detector, close is not always close enough. The most obvious problem when using a handheld radio is that the antenna connection on a handheld is very seldom optimized at 50 ohms. Even if the rubber duck antenna has a BNC connector on it, one cannot assume that the radio's source and load impedances
Re: [Repeater-Builder] EF Johnson 25A rack mount power Supply
Guane; I have one too. The free hanging cable plugs directly into the matchimg receptacle on the EF Johnson radio, i have no idea what the receptacle on the power supply is used for. I'm still waiting for a definite I.D. and manual for the home brew repeater rig I have. The closest thing I have to an ID/serial # is : 0073CO22A. Manufactured August 1982. de Lee K4LJP 73 On Sun, Sep 20, 2009 at 12:57 PM, lbd9992001 selk...@comcast.net wrote: I have an old EF Johnson 25A 14VDC rack mount power supply. The part number on it is 023-3341-012. The supply has a pigtail EFJ-style (male, female monster banana pin) receptacle on the power supply chassis and a freehanging one on a short cable. Can anyone provide a wiring diagram/schematic or at least enlighten me as to how the cable and chassis connectors are to be connected to a load? Thanks, Duane Fowler -- Always drink upstream from the herd.
Re: [Repeater-Builder] EF Johnson 25A rack mount power Supply
i have no idea what the receptacle on the power supply is used for.
Do not hook a radio to the{ receptacle on the power supply } It is used to
connect and charge a 12 Volt backup battery.
You can hook your radio/repeater or a fuse distribution block to the free
hanging red/black cables.
SD
--- On Sun, 9/20/09, Lee Pennington localjunkpedd...@gmail.com wrote:
From: Lee Pennington localjunkpedd...@gmail.com
Subject: Re: [Repeater-Builder] EF Johnson 25A rack mount power Supply
To: Repeater-Builder@yahoogroups.com
Date: Sunday, September 20, 2009, 1:34 PM
Guane;
I have one too. The free hanging cable plugs directly into the matchimg
receptacle on the EF Johnson radio, i have no idea what the receptacle on the
power supply is used for. I'm still waiting for a definite I.D. and manual for
the home brew repeater rig I have. The closest thing I have to an ID/serial #
is : 0073CO22A. Manufactured August 1982.
de Lee
K4LJP
73
On Sun, Sep 20, 2009 at 12:57 PM, lbd9992001 selk...@comcast. net wrote:
I have an old EF Johnson 25A 14VDC rack mount power supply. The part number on
it is 023-3341-012. The supply has a pigtail EFJ-style (male, female monster
banana pin) receptacle on the power supply chassis and a freehanging one on a
short cable. Can anyone provide a wiring diagram/schematic or at least
enlighten me as to how the cable and chassis connectors are to be connected to
a load?
Thanks,
Duane Fowler
--
Always drink upstream from the herd.
Re: [Repeater-Builder] CAP Mastr II Repeaters
What do you mean low split, the TX was up in the 148 range unless these were upside-down for some reason? What's the specific split number? 66? Nate WY0X On Sep 19, 2009, at 10:29 AM, Andrew Seybold wrote: There should a number of Civil Air Patrol Mastr II VHF repeaters coming into the market—these are all LOW split and the newest GE Mastr II’s available since the CAP has GE open up the Mastr II line and build them specifically for CAP, if you are looking for a great VHF repeater keep your eyes open for these and if you have any contact me off list, I am looking for two or three. Andy W6AMS -- Nate Duehr n...@natetech.com http://facebook.com/denverpilot http://twitter.com/denverpilot Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: mailto:repeater-builder-dig...@yahoogroups.com mailto:repeater-builder-fullfeatu...@yahoogroups.com * To unsubscribe from this group, send an email to: repeater-builder-unsubscr...@yahoogroups.com * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] CAP Mastr II Repeaters
I've seen a few 56 Chris Kb0wlf -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- buil...@yahoogroups.com] On Behalf Of Nate Duehr Sent: Sunday, September 20, 2009 3:05 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] CAP Mastr II Repeaters What do you mean low split, the TX was up in the 148 range unless these were upside-down for some reason? What's the specific split number? 66? Nate WY0X On Sep 19, 2009, at 10:29 AM, Andrew Seybold wrote: There should a number of Civil Air Patrol Mastr II VHF repeaters coming into the market-these are all LOW split and the newest GE Mastr II's available since the CAP has GE open up the Mastr II line and build them specifically for CAP, if you are looking for a great VHF repeater keep your eyes open for these and if you have any contact me off list, I am looking for two or three. Andy W6AMS -- Nate Duehr n...@natetech.com http://facebook.com/denverpilot http://twitter.com/denverpilot Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.409 / Virus Database: 270.13.87/2356 - Release Date: 09/20/09 06:22:00
Re: [Repeater-Builder] CAP Mastr II Repeaters
Yeah, I had a private note saying they were probably 56 split. Relatively rare. Kinda neat when you can find 'em. Nate WY0X On Sep 20, 2009, at 2:41 PM, Chris Curtis wrote: I've seen a few 56 Chris Kb0wlf -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- buil...@yahoogroups.com] On Behalf Of Nate Duehr Sent: Sunday, September 20, 2009 3:05 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] CAP Mastr II Repeaters What do you mean low split, the TX was up in the 148 range unless these were upside-down for some reason? What's the specific split number? 66? Nate WY0X On Sep 19, 2009, at 10:29 AM, Andrew Seybold wrote: There should a number of Civil Air Patrol Mastr II VHF repeaters coming into the market-these are all LOW split and the newest GE Mastr II's available since the CAP has GE open up the Mastr II line and build them specifically for CAP, if you are looking for a great VHF repeater keep your eyes open for these and if you have any contact me off list, I am looking for two or three. Andy W6AMS -- Nate Duehr n...@natetech.com http://facebook.com/denverpilot http://twitter.com/denverpilot Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.409 / Virus Database: 270.13.87/2356 - Release Date: 09/20/09 06:22:00 -- Nate Duehr n...@natetech.com http://facebook.com/denverpilot http://twitter.com/denverpilot Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: mailto:repeater-builder-dig...@yahoogroups.com mailto:repeater-builder-fullfeatu...@yahoogroups.com * To unsubscribe from this group, send an email to: repeater-builder-unsubscr...@yahoogroups.com * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] CSI-32 Community repeater tone controller
Hello All, Just wanted to let everyone know this item is listed on eBay if you are interested. 73 de Joe KB5VJY http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=330361209084ssPageName=STRK:MESELX:IT
[Repeater-Builder] FS: Icom 220 Repeater
FOR SALE: PACKAGE FOR ONE WEEK. IF NOT GONE BY THEN I WILL PART IT OUT. NO TRADES. Prices are plus shipping and any special packing if required. Sold as-is no warranty implied or given. + This repeater is on the air. Repeater and Duplexer look and work like new. Pictures on request. 224.800 Out 223.200 In with a PL of 107.2 ICOM RP-2210 Repeater - Ordered new for ham frequencies (set by dip switches). 25 Watts continuous. Replaced UHF connectors and RG-58 with N connectors and RG-142 coax inside. 15 pin D connector for controller on back. All signals brought to this connector by miniature coax. COR, PTT, Rx Audio, Tx Audio and Discriminator out. Jumpering COR to PTT and Rx audio to Tx audio works to test. Full ORIGINAL service manual included. Not a copy. DOES NOT INCLUDE AN EXTERNAL CONTROLLER OR PL BOARD - (Using my NHRC-2, my backup for other repeaters) Wacom Duplexers BpBr - Model 652 Ordered new on above frequencies from Waycom Original Calibration sheet and Tuning Instructions Included Package includes: Repeater and Duplexers with RG-142 interconnect cables and Polyphaser IS-B50LN-C2. Both are like new. Over $2000 new, Asking $1000 Free with Repeater: 6' Motorola rack with 1/4 brass plate on top for 4 Polyphasers, two locking doors and key. WILL NOT SHIP RACK - PICK UP ONLY - I will dispose of if not taken with repeater. TE Systems Repeater Amplifier - NOT WORKING M#2210R 222-225 MHz NOT WORKING (I got it that way, not sure what is bad or how damage was caused) For purchase separately if wanted: Hustler G7-220 antenna NEW out of box. NEVER assembled. $100 (Will not sell unless repeater is sold.) If sold separately: Repeater $ 500 Duplexers $ 500 Amplifier$ 50 Polyphaser $ 20 Antenna $ 100 Next up are my TM742's with 220 modules and Kenwood TH315 HT, only going after the repeater sells. Shanon Herron KA8SPW Garden City, Michigan 15 miles west of Detroit 734-421-9221 9AM - 9 PM Eastern
Re: [Repeater-Builder] Unidentified EF Johnson Repeater
*Lance; My machine is way older than the CR series. I saw a picture and PDF file for them and their vintage is newer.The power supply in my unit has a huge heat sink. Mine has N type Tx and Rx connectors coming out of the top of the cabinet, they weren't being used when I got it. The receiver had RG 142U hardwired to the input which ran directly to the cans. I drilled a hole and installed a chassis mount BNC connector and put in a BNC to type N jumper in. I also installed a jumper likewise from the Xmitter to the other N conector coming out the top. I'll see if my friend can take some photos to send to you so we can indentify it. Hopefully with that info I can obtain some sort of service manual or at least a schematic. I hope you can come up with what I need. I have several other machines on the air even as we speak, but this is my first Johnson, but it was free and I've got too much time on my hands, and a local club needs a repeater so I'll git 'r' done and turn it over to them. Thanks. [?] de Lee K4LJP 73* On Fri, Sep 18, 2009 at 1:46 PM, Captainlance captainla...@optonline.netwrote: *Check the back of each chassis, receiver and transmitter for the applicable model numbers, the radio you have is probably a CR1000, CR1010, or CR1100* *made up of basically 2 mobile radios hung on pull out rails. The later ones have the chassis in pull out boxes, sort of like small rack units.* *I may have what you need if you can give me more info, or a photo of the insides...* *Lance N2HBA ( 20+ year EJF dealer).* - Original Message - *From:* Robert McNeill rob...@ncbfi.org *To:* Repeater-Builder@yahoogroups.com *Sent:* Friday, September 18, 2009 12:39 PM *Subject:* RE: [Repeater-Builder] Unidentified EF Johnson Repeater I believe that is a Civil Air Patrol split… -- *From:* Repeater-Builder@yahoogroups.com [mailto: repeater-buil...@yahoogroups.com] *On Behalf Of *Lee Pennington *Sent:* Friday, September 18, 2009 12:28 PM *To:* Repeater Builders Yahoo Group *Subject:* [Repeater-Builder] Unidentified EF Johnson Repeater Gentlmen; Need help in Identifying Johnson Vhf repeater... No model #, or serial # found on unit. I recently acquired a working EF Johnson VHF homebrew repeater, has an odd ball split. Tx freq. 148.150,..Rx freq. 143.900. Unit Xmits 120 watts w/good audio, receiver is fairly sharp. Encodes and decodes, 141.3PL tone. Homebrew controller with courtesy tone only, No cw ID. Unit appears to be a mobile radio in a Johnson cabinet w/ EFJohnson P.S. The cabinet is about 30 X 22 x 11 inches The mobile radio measures about 15 x 8 x 3 inches. The vintage is 1982... Need to ID Unit, ( PPL 6050 ???) help, and manual if possible. Are xtals still available? Thanks in advance for any assistance, de Lee K4LJP 73 -- Always drink upstream from the herd. -- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.409 / Virus Database: 270.13.105/2380 - Release Date: 09/18/09 07:49:00 -- Always drink upstream from the herd. 1E3.gif
Re: [Repeater-Builder] Unidentified EF Johnson Repeater
I'll be looking forward to the photo, hope I can assist you. lance - Original Message - From: Lee Pennington To: Repeater-Builder@yahoogroups.com Sent: Sunday, September 20, 2009 8:55 PM Subject: Re: [Repeater-Builder] Unidentified EF Johnson Repeater Lance; My machine is way older than the CR series. I saw a picture and PDF file for them and their vintage is newer.The power supply in my unit has a huge heat sink. Mine has N type Tx and Rx connectors coming out of the top of the cabinet, they weren't being used when I got it. The receiver had RG 142U hardwired to the input which ran directly to the cans. I drilled a hole and installed a chassis mount BNC connector and put in a BNC to type N jumper in. I also installed a jumper likewise from the Xmitter to the other N conector coming out the top. I'll see if my friend can take some photos to send to you so we can indentify it. Hopefully with that info I can obtain some sort of service manual or at least a schematic. I hope you can come up with what I need. I have several other machines on the air even as we speak, but this is my first Johnson, but it was free and I've got too much time on my hands, and a local club needs a repeater so I'll git 'r' done and turn it over to them. Thanks. de Lee K4LJP 73 On Fri, Sep 18, 2009 at 1:46 PM, Captainlance captainla...@optonline.net wrote: Check the back of each chassis, receiver and transmitter for the applicable model numbers, the radio you have is probably a CR1000, CR1010, or CR1100 made up of basically 2 mobile radios hung on pull out rails. The later ones have the chassis in pull out boxes, sort of like small rack units. I may have what you need if you can give me more info, or a photo of the insides... Lance N2HBA ( 20+ year EJF dealer). - Original Message - From: Robert McNeill To: Repeater-Builder@yahoogroups.com Sent: Friday, September 18, 2009 12:39 PM Subject: RE: [Repeater-Builder] Unidentified EF Johnson Repeater I believe that is a Civil Air Patrol split… -- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Lee Pennington Sent: Friday, September 18, 2009 12:28 PM To: Repeater Builders Yahoo Group Subject: [Repeater-Builder] Unidentified EF Johnson Repeater Gentlmen; Need help in Identifying Johnson Vhf repeater... No model #, or serial # found on unit. I recently acquired a working EF Johnson VHF homebrew repeater, has an odd ball split. Tx freq. 148.150,..Rx freq. 143.900. Unit Xmits 120 watts w/good audio, receiver is fairly sharp. Encodes and decodes, 141.3PL tone. Homebrew controller with courtesy tone only, No cw ID. Unit appears to be a mobile radio in a Johnson cabinet w/ EFJohnson P.S. The cabinet is about 30 X 22 x 11 inches The mobile radio measures about 15 x 8 x 3 inches. The vintage is 1982... Need to ID Unit, ( PPL 6050 ???) help, and manual if possible. Are xtals still available? Thanks in advance for any assistance, de Lee K4LJP 73 -- Always drink upstream from the herd. -- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.409 / Virus Database: 270.13.105/2380 - Release Date: 09/18/09 07:49:00 -- Always drink upstream from the herd. -- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.409 / Virus Database: 270.13.110/2385 - Release Date: 09/20/09 17:51:00 attachment: 1E3.gif
Re: [Repeater-Builder] UHF Duplexers
At 9/20/2009 09:41, you wrote: Eric, I did find my old Icom IC-2710 dual band mobile last night. Would that be okay to use instead of the HT? I suggest putting an isolator between the mobile radio duplexer (or wattmeter, if you're measuring return loss). That will make your mobile radio's TX look like 50 ohms. Bob NO6B
