Re: [Repeater-Builder] 10 meter repeater
I have been operating a 10 meter FM repeater on 29.56/29/66 for the last 15+ years in Minnesota. It was a split site repeater with the repeater IDer/at the receive site and a cross-connect to a 2 meter repeater where a full function 2 port repeater controller provided the ID and control. . The equipment consisted of GE Mastr PRO equipment at both the receive site and the transmit site. The repeater transmitter ran approx 60 watts out. Antennas were a horizontial dipole at the receive site (as most of the users will be running horizontial polarized beams at their base stations) and a vertical antenna at the transmitter site. The two sites were separated by 5 to 7 miles and a 445 Mhz auxiliary link was used between the sites. The receive dipole was about 70 feet above the ground and about 150 feet above average terrain. The transmitter antenna was located about 60 feet above the ground and about 90 feet above average terrain. I found that I got almost zero support ( financial or equipment) from local amateurs as none of them used the repeater because they expected excellent ground wave coverage and it did not occur. Most of my repeater users were in the 1200 to 1400 mile radius zone from the transmitter. I worked a lot of Florida mobiles on my repeater sometimes contacting the same mobile multiple times a day as they drove from Daytona Beach south towards Miami. When I got on the my 10 meter repeater frequency I found the repeaters I was bringing up were located in Puerto Rico and Florida and along the west coast in California. The only way I could talk to someone local (in Minnesota) was thru the 2 meter cross-connect. (and my 10 meter mobile was a 100 watt output Motorola X9000 radio). I finally gave up the 29.56/29.66 pair this last year as I lost use of the 10 meter receive site ( the amateur radio operator that I shared this site with died and his family revoved the tower that it was on). I had fun operating this repeater, but it was time to quit putting my amateur radio funds in something that was not helping myself or the local amateurs. Hope this gives you some ideas on what you can use for equipment for a 10 meter repeater and what type of coverage/opeation you can expect on this band. Make sure you add a 222 or 444 Mhz repeater cross connect to your 10 meter repeater so that you can use it locally). Let me know if you have questions. Paul K0LAV White Bear Lake, MN -- Original message -- From: tom_kd8deg [EMAIL PROTECTED] I want to thank all of you that responed to my quary about puting up a 10 meter repeater. Your information is going to be a big help in decideing whether to put up a repeater, also if we do put one on the air, this info will put us in the right direction. 73 All de Tom KD8DEG
Re: [Repeater-Builder] 10 Meter Repeater
Why can the same ID not be used for both as long as it is part of the same system? Joe M. Kevin Custer wrote: MCH wrote: Are you talking about the ID aspect or the control (enable/disable TX) aspect? Joe M. Both.
[Repeater-Builder] Re: RITRON RRX-450 UHF PROGRAMMABLE REPEATER
Jack I've just done two., easy conversion, however the built in duplexer is at its' range end., one tuned good., the other so., so., I still have to play a bit more. 40 page manual can be copied and sent to you-let me know Jerry VE3 EXT
Re: [Repeater-Builder] 10 Meter Repeater
MCH wrote: Are you talking about the ID aspect or the control (enable/disable TX) aspect? Joe M. Both. Kevin wrote: To be perfectly legal, a controller needs to be placed into both units.
[Repeater-Builder] Re: 10 Meter Repeater
Leaving the question of control aside as a totally different discussion... On the ID issue we have had succcess in the local link systems using a free running IDer (de WB0VHW/A de WB0VHW/A ad nauseum) set to generate side tone CW at 4000Hz and mixed with the transmit audio. Any time the linking radio is transmitting this goes out with the audio stream and is level set to produce about 1KHz of deviation. While quite a bit lighter than the audio on the link it is still perfectly copyable. On the receive side we use a notch filter to knock it out the ID before it passes into the controller. Because it is out of the normal audio passband notching it does not affect the audio quality to any degree. Seems to work well and is fairly cost effect. 73 de Bill WB0VHW --- In Repeater-Builder@yahoogroups.com, Milt [EMAIL PROTECTED] wrote: To be perfectly legal, a controller need to be placed into both units. Being *perfectly* legal costs money and hams are cheap, therefore, usually, only half of the system is legal. Kevin I know of a 6 meter split site repeater in the capitol city of PA that has absolutely NO ID. Most likely a pair of FT-8900's set up as back to back crossband repeaters. Sad Milt N3LTQ
[Repeater-Builder] VHF Multi-coupler harness question
I've been experimenting with a Sinclair 4 cavity C-Series VHF Multi- Coupler however have high loss between the antenna connector and the feed through connector. X | | - Connector to antenna | - Band-Pass Cans to 144.390 Tx/Rx | - Feedthrough connector to next multi-coupler | - Band Re-ject 144.390 The ex-commercial multi-coupler was factory tuned for 155MHz and I'm trying to rework it down to APRS (144.390) Can anyone point me to where I can find the formula to make up a new 4 connector cable? Any help would be greatly appreciated. Thanks Ken
[Repeater-Builder] 10 meter repeater
I want to thank all of you that responed to my quary about puting up a 10 meter repeater. Your information is going to be a big help in decideing whether to put up a repeater, also if we do put one on the air, this info will put us in the right direction. 73 All de Tom KD8DEG
[Repeater-Builder] Spectrum SCR500 Receiver
Hello all, I have acquired an SCR500 Receiver in the VHF range. My ultimate goal is to connect this to an ACC RC96 controller, as a control receiver. However I do not have a manual for the receiverdoes anyone have one that they can email me. It would be greatly appreciated. Thanks Chris VE3CTP please email to [EMAIL PROTECTED]
[Repeater-Builder] RITRON RRX-450 UHF PROGRAMMABLE REPEATER
Has anybody every tuned one of these down to ham frequencies? Does anybody have (or know where I can find) a manual and programming cable? Thanks in advance Jack
Re: [Repeater-Builder] ad5x page url
Phil Salas, AD5X, is a tremendous person and an excellent ham. I have known Phil since he hired into TI as a new EE in the early 70's. He stayed there a few years and then went away and up on his career and made me jealous when he retired many years before me! If you ever get a chance to hear Phil give a talk at a local club meeting, do not miss it. He has a ton of knowledge and is full of ideas. He also is a regular contributor to QST, if you have not noticed. He also does a lot of work with MFJ and often can improve their products even more with his real world use, especially in the realm of QRP and CW. A fine person, for sure. Roger W5RD Finally retired after 41 years - Original Message - From: skipp025 To: Repeater-Builder@yahoogroups.com Sent: Tuesday, January 29, 2008 12:01 PM Subject: [Repeater-Builder] ad5x page url The AD5X web page is well worth a visit if you've not seen it before. http://www.ad5x.com/articles.htm cheers, s. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.19.9/1239 - Release Date: 1/23/2008 10:24 AM
Re: [Repeater-Builder] 10 meter repeater
Paul, What was your goal for the repeater? Was it intended to be useful for distant users during band openings, or for locals when the band was dead? Using a horizontal dipole on the receiver punished mobiles running vertical whips by as much as 20 - 25 dB, and have coverage nulls off the ends of the dipole, so it's no wonder the machine was hard to hit. (-20 dB would make your 100-watt mobile equivalent to running 1 watt.) The same would be true in reverse on the output...guys running horizontally polarized dipoles or HF beams would get poor signals on the repeater output. (-20 dB from 60 watts is... 600 milliwatts!) Besides...what self-respecting HF operator with a tribander wants to work a local repeater? He's probably after DX. The distant stations you worked crossband were able to both hit and hear the machine because skip causes rotation of the original polarization, and it can even be received better vertical at one point, and horizontal at a spot 5 miles away, at the same moment. But...guys in other states aren't likely to support your repeater financially. It might have worked out better had you chosen a specific mission, then built the repeater to be optimum for that purpose. I'm interested in building a 10m repeater, but I'd just as soon shut it down during band openings. What's fun for me is to have DX when the band is open, and good local communications with the same rig when the band goes dead. That means, for me, I'll want high, vertical antennas at both sites to favor mobiles. A 10m repeater can have superb local and regional coverage using vertical antennas at good sites. When I lived in Atlanta in the mid-80s, we had a great local bunch on 10 FM, and a local repeater which covered the metro beautifully with vertical antennas. There was also a machine in Albany, GA I could hit with my converted CB mobile if I was in a clear spot. That's 140 miles, not too shabby for a 4-foot helically-wound fiberglass whip and 3 watts. I could hit it from anywhere in the Atlanta area with the 70-watt amp, but had too much mobile noise to hear it reliably. If you want a repeater which works well for both horizontal and vertical polarization, it would be worth trying circular polarization, using crossed dipoles like the satellite guys use. Circular polarization would allow both horizontal and vertical users to hit and hear the machine with only 3 dB loss, compared to a dipole optimized for their polarization. It would also greatly reduce fading on DX signals during band openings. But...if you were looking for financial support, verticals would probably be the way to go. 73, Paul, AE4KR - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, January 29, 2008 6:21 AM Subject: Re: [Repeater-Builder] 10 meter repeater I have been operating a 10 meter FM repeater on 29.56/29/66 for the last 15+ years in Minnesota. It was a split site repeater with the repeater IDer/at the receive site and a cross-connect to a 2 meter repeater where a full function 2 port repeater controller provided the ID and control. . The equipment consisted of GE Mastr PRO equipment at both the receive site and the transmit site. The repeater transmitter ran approx 60 watts out. Antennas were a horizontial dipole at the receive site (as most of the users will be running horizontial polarized beams at their base stations) and a vertical antenna at the transmitter site. The two sites were separated by 5 to 7 miles and a 445 Mhz auxiliary link was used between the sites. The receive dipole was about 70 feet above the ground and about 150 feet above average terrain. The transmitter antenna was located about 60 feet above the ground and about 90 feet above average terrain. I found that I got almost zero support ( financial or equipment) from local amateurs as none of them used the repeater because they expected excellent ground wave coverage and it did not occur. Most of my repeater users were in the 1200 to 1400 mile radius zone from the transmitter. I worked a lot of Florida mobiles on my repeater sometimes contacting the same mobile multiple times a day as they drove from Daytona Beach south towards Miami. When I got on the my 10 meter repeater frequency I found the repeaters I was bringing up were located in Puerto Rico and Florida and along the west coast in California. The only way I could talk to someone local (in Minnesota) was thru the 2 meter cross-connect. (and my 10 meter mobile was a 100 watt output Motorola X9000 radio). I finally gave up the 29.56/29.66 pair this last year as I lost use of the 10 meter receive site ( the amateur radio operator that I shared this site with died and his family revoved the tower that it was on). I had fun operating this repeater, but it was time to quit putting my amateur radio funds in something that was not
[Repeater-Builder] ad5x page url
The AD5X web page is well worth a visit if you've not seen it before. http://www.ad5x.com/articles.htm cheers, s.
Re: [Repeater-Builder] 10 Meter Repeater
You are assuming that all users will be coming into the first crossband equipment, but in reality, there may be users that come in on the crosslink receiver, therefore, no ID would ever happen on that user at the main transmitter. Also, if the crosslink were run in carrier squelch, and noise or other such would trigger the transmitter site, no ID would occur. If that transmitter comes up, for whatever reason, it MUST be id'd to be perfectly legal. Besides, these days it cheaper to buy a real controller (like the small ICS basic) than it is to buy a DTMF controller that has no ID functionality. Kevin MCH wrote: Why can the same ID not be used for both as long as it is part of the same system? Joe M. Kevin Custer wrote: MCH wrote: Are you talking about the ID aspect or the control (enable/disable TX) aspect? Joe M. Both.
Re: [Repeater-Builder] Re: RITRON RRX-450 UHF PROGRAMMABLE REPEATER
Jerry. Thanks for the info -- I'd love a copy of the manual -- tell me how much and I can paypal or whatever you like. Thanks very much again! Jack w3fun [EMAIL PROTECTED] wrote: Jack I've just done two., easy conversion, however the built in duplexer is at its' range end., one tuned good., the other so., so., I still have to play a bit more. 40 page manual can be copied and sent to you-let me know Jerry VE3 EXT - Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.
Re: [Repeater-Builder] 10 meter repeater
The aim of this 10 meter repeater, during its first 4 to 5 years of operation was to provide a 10 Meter FM repeater for local use. It started with both receive and transmit antennas being verticals. But I found that no one in our metropolitan area of about 4000 to 5000 licensed amateurs was interested in LOCAL communications. on 10 meters. They had 2 meter repeaters for local communications ( and their are 30 to 40 2 meter repeaters located within 30 miles of my location). They could also use the 3 six meter repeaters and the 20 to 30 UHF repeaters for local use. I then attached the 2 meter cross-band repeater and got a few local hams interested with the idea that they could get on 10 meters. But they never quite understood that they were on a cross-band repeater and could only hear with the local 29.56 receiver heard. What they really wanted was a remote base on 29.56/66 from the 2 meter repeater.The idea that they were listening on an input from a 10 meter repeater and transmitting on the output of a 10 meter repeater never could be quite understood by the 2 meter operators. The question of why can't I hear all of the other people on the different 29.66 repeaters was constantly raised. My current plans call for installing a 100 watt Motorola Maratrac multiple channel mobile on 10 meters and cross-connect it to a Motorola MSF5000 UHF repeater that I operate. This will replace the 10 meter repeater. Now I can offer a multiple channel 10 meter FM cross-connected repeater that can be used on the 10 meter repeater channels as well as the 10 meter FM simplex channels. I think this planned 10 meter station better fits what the amateurs in the Twin Cities Metro area expect of 10 meter FM and will get some support from local hams. Paul K0LAV -- Original message -- From: Paul Plack [EMAIL PROTECTED] Paul, What was your goal for the repeater? Was it intended to be useful for distant users during band openings, or for locals when the band was dead? Using a horizontal dipole on the receiver punished mobiles running vertical whips by as much as 20 - 25 dB, and have coverage nulls off the ends of the dipole, so it's no wonder the machine was hard to hit. (-20 dB would make your 100-watt mobile equivalent to running 1 watt.) The same would be true in reverse on the output...guys running horizontally polarized dipoles or HF beams would get poor signals on the repeater output. (-20 dB from 60 watts is... 600 milliwatts!) Besides...what self-respecting HF operator with a tribander wants to work a local repeater? He's probably after DX. The distant stations you worked crossband were able to both hit and hear the machine because skip causes rotation of the original polarization, and it can even be received better vertical at one point, and horizontal at a spot 5 miles away, at the same moment. But...guys in other states aren't likely to support your repeater financially. It might have worked out better had you chosen a specific mission, then built the repeater to be optimum for that purpose. I'm interested in building a 10m repeater, but I'd just as soon shut it down during band openings. What's fun for me is to have DX when the band is open, and good local communications with the same rig when the band goes dead. That means, for me, I'll want high, vertical antennas at both sites to favor mobiles. A 10m repeater can have superb local and regional coverage using vertical antennas at good sites. When I lived in Atlanta in the mid-80s, we had a great local bunch on 10 FM, and a local repeater which covered the metro beautifully with vertical antennas. There was also a machine in Albany, GA I could hit with my converted CB mobile if I was in a clear spot. That's 140 miles, not too shabby for a 4-foot helically-wound fiberglass whip and 3 watts. I could hit it from anywhere in the Atlanta area with the 70-watt amp, but had too much mobile noise to hear it reliably. If you want a repeater which works well for both horizontal and vertical polarization, it would be worth trying circular polarization, using crossed dipoles like the satellite guys use. Circular polarization would allow both horizontal and vertical users to hit and hear the machine with only 3 dB loss, compared to a dipole optimized for their polarization. It would also greatly reduce fading on DX signals during band openings. But...if you were looking for financial support, verticals would probably be the way to go. 73, Paul, AE4KR - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, January 29, 2008 6:21 AM Subject: Re: [Repeater-Builder] 10 meter repeater I have been operating a 10 meter FM repeater on 29.56/29/66 for the last 15+ years in Minnesota. It was a split site repeater with the repeater IDer/at the receive site and a cross-connect to a 2 meter repeater where a full function 2 port repeater
Re: [Repeater-Builder] 10 Meter Repeater
What about a Hybrid-Ring style duplexer? With 1 5/8 hardline and copper water pipe variable sections for tuning?
[Repeater-Builder] Re: COR on GM300 8 channel reciever
Sorry to bring this back up the pull up resistor did not start the COR. Looking at the schematic the MMBT3904 NPN is connected to pin 8 from this a 10k resistor takes it to the MC68xxx processor. Best guess ? programming? or NPN transistor. Thanks, Henry --- In Repeater-Builder@yahoogroups.com, Henry Harms [EMAIL PROTECTED] wrote: OK! thanks Russ, that makes perfect sense. I will try that this evening. 73's Henry --- In Repeater-Builder@yahoogroups.com, Russ Crisp crisp@ wrote: Hello Henry. I believe the COS on the GM300 is active LO. Open collector.. Try using something like a 10K pull up resistor tied back to 12v. Then, when the receiver hears a signal, the voltage at the junction of the 10K and pin 8 should go from 12v to near 0. Set the ICS controller to use active LO COR. Hope I'm reading you right here. 73's Russ K4RCC From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Henry Harms Sent: Saturday, January 26, 2008 4:18 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] COR on GM300 8 channel reciever I have inherited a GR300 UHF repeater reprogrammed to 440 ham bands, and I am trying to set up a ICS Basic controller. The RIC box was hit by lightening and blew four of the IC's into little pieces. The radios seem to be working fine. They receive and transmit as expected but, I don't seem to have COR on pin 8. Voltage stays at 0 either way. This is my first attempt at building a repeater. Can't seem to find anything in the service or operators manual as to how much voltage should be present on pin eight and I am guessing that it is broke, I hope not as a ham in Missouri we could use a UHF machine linked to the Interlink for emergency use. Any help would be appreciated. Thanks in advance. KB0ROX Henry
Re: [Repeater-Builder] Re: COR on GM300 8 channel reciever
At 11:43 AM 01/29/08, you wrote: Sorry to bring this back up the pull up resistor did not start the COR. Looking at the schematic the MMBT3904 NPN is connected to pin 8 from this a 10k resistor takes it to the MC68xxx processor. Best guess ? programming? or NPN transistor. Thanks, Henry The design of the GM300 can be traced back to the Maxtrac, and much of the background material for the Maxtrac applies to the GM series. If you look at this page http://www.repeater-builder.com/maxtrac/maxtrac-index.html, one of the notes says On any radio that is new to you do NOT assume that any accessory connector pin programming is present, or if it is there, is correct for your environment. Are you certain that your radio is programmed for COR? Mike WA6ILQ
[Repeater-Builder] Re: Yaesu FT-2800 Interface
Hi, Squelched discriminator is a paradox of terms! Most of the time the squelch function is derived from the noise seen at the discriminator. I suspect you really mean either filtered (deemphasized) or unfiltered gated audio and/or COS. On a Kenwood redio I had a similar requirement. I used the NHRC squelch board: http://www.nhrc.net/nhrc-squelch/ I tapped into raw discrimator audio from the Kenwood and with this board and was able to generate squelch logic that can generate either COS or use the logic to gate audio. Am I to assume you are trying to use this 2800 as a remote base? Is that correct? If so all you really need is COS, PL squelch (if desired) and either discrimator audio or deemphasized audio (line audio) to go into the controller. Normally, if you use COS input to a repeater controller you do not need to gate the RX audio. Some times this can end up being an art. More specific information is needed for your application and and I am sure some body can help... 73 Bernie Parker K5BP DARC Tech Officer --- In Repeater-Builder@yahoogroups.com, wb7cjq [EMAIL PROTECTED] wrote: Does anybody know where to pick-off the squelched discriminator audio, the line level audio input and the COS signals ??? The schematic shows J309 that appears to have some of this stuff, but the connector is itty-bitty - I can't find a mating connector anywhere !!! I opened the radio this morning and just went sigh... MilSpec, and I'm not very interested in completely tearing the radio apart to get to needed signals. I suspect that most (if not all) of them are on the PCB that you see when you pull the lid. I went in with a tiny multimeter probe and touched a pin going to the front panel (in search of the COS - AKA Busy line) and mnaged to touch two tiny pins at the sametime. POOF! No more radio. Thank God for warranties. My 60 year old 'fat fingers' are too 'fat' for this micro type work, and I'm a skinny guy! Hope somebody has already chased these signals and can post the info. !!! Thanks, Dave WB7CJQ
Re: [Repeater-Builder] 10 Meter Repeater
You're assuming they will. If it is guarded (and ANY control link should be guarded and not running CSQ), they should not be coming in the control link. But, your point is well taken. I guess someone can break into the site and key your TX, too. It's really the same difference as if they hack into your control link. Joe M. Kevin Custer wrote: You are assuming that all users will be coming into the first crossband equipment, but in reality, there may be users that come in on the crosslink receiver, therefore, no ID would ever happen on that user at the main transmitter. Also, if the crosslink were run in carrier squelch, and noise or other such would trigger the transmitter site, no ID would occur. If that transmitter comes up, for whatever reason, it MUST be id'd to be perfectly legal. Besides, these days it cheaper to buy a real controller (like the small ICS basic) than it is to buy a DTMF controller that has no ID functionality. Kevin MCH wrote: Why can the same ID not be used for both as long as it is part of the same system? Joe M. Kevin Custer wrote: MCH wrote: Are you talking about the ID aspect or the control (enable/disable TX) aspect? Joe M. Both. Yahoo! Groups Links
[Repeater-Builder] Re: COR on GM300 8 channel reciever
No, I am not certain. I had someone program the radios for ham freq. That is kind of what I was wondering. The manual shows the 8 channel pin 8 is COR and the 16 channel pin 8 is programmable. I don't have, or haven't found documentation for the RSS software. Is there a option in the program that is simply enabling COR on the 8 channel model? Sorry for all of the stupid questions but I am trying to learn as I go. The person that programmed the radios initially travels a lot and I don't want to keep bugging him. Thanks, Henry The design of the GM300 can be traced back to the Maxtrac, and much of the background material for the Maxtrac applies to the GM series. If you look at this page http://www.repeater-builder.com/maxtrac/maxtrac-index.html, one of the notes says On any radio that is new to you do NOT assume that any accessory connector pin programming is present, or if it is there, is correct for your environment. Are you certain that your radio is programmed for COR? Mike WA6ILQ
Re: [Repeater-Builder] Re: Desense Problem on 222 MHz Repeater
nj902 wrote: The industry is beginning to develop practices to deal with PIM. Andrew has published some information regarding PIM in transmission lines as has Amphenol with respect to PIM in connectors. See also Intermodulation in Coaxial Connectors, RF Design, September 1996. Doesn't matter much at sites where the site owners won't even clean off abandoned crap (antennas, feedline) off the towers... (grumble grumble)... Nate WY0X
Re: [Repeater-Builder] Re: Stupid Question about Db antennas.
Larry Wagoner wrote: I have my hands on what I believe to be a Sinclair 224 Antenna. It is similar to a DB224, but has a smaller diameter mast, with thicker wall, and the harness is interior to the mast. The dipoles are fed through the interior of the bracket that holds the dipoles. Other than sweeping it with an antenna analyzer, and pulling each dipole bracket off to examine the interior for signs of arcing, is there any check I should do to be sure of the antenna being OK before we lift it? The only other thing I can think of on these is if the harness develops cracking internally, water can get into the feedline and down into your hardline... But it's really hard to get in there to look. If it's really really old, your chances of that go up a bit, but we've had both external and internal harness versions of these go for 10+ years without this happening. We have an external harness one that I suspect has cracking now though, and we're learning about it the hard way... new hardline last summer, took it down and inspected it as best we could, found no evidence of water ingress, but the original hardline was full of water. We made the assumption it got in at the connector due to a bad weatherproofing job, but now I hear that the PA is dead (even with an isolator on it, same as last time) and I'm starting to wonder if we'll find another nice chunk of 7/8's full of water when we can finally get down there to look it over. Nate WY0X
Re: [Repeater-Builder] Re: Desense Problem on 222 MHz Repeater
Richard Sharp, KQ4KX wrote: which will reduce and/or eliminate any IMD issues from those sources. DCI is one manufacturer of window filters for HAM bands (www.dci.ca http://www.dci.ca). Careful. I've looked over their product line and their stock filters have published SWR numbers that don't look good for high 147 and low 145 repeaters... they tend to be made for the center of the band for the end-users, not for repeaters. The skirts on even their 4 MHz wide filters start to roll off if your machines are at either end of the spectrum. Check carefully if you choose to use their filters, or call them and ask them if they'd tune them lower/higher (probably for a charge). Better yet, buy big, real, high-Q bandpass cavities and don't mess around with these little things made for hams at home. Nate WY0X
[Repeater-Builder] Re: Yaesu FT-2800 Interface
--- In Repeater-Builder@yahoogroups.com, dallasreact112 [EMAIL PROTECTED] wrote: Hi, Squelched discriminator is a paradox of terms! Most of the time the squelch function is derived from the noise seen at the discriminator. I suspect you really mean either filtered (deemphasized) or unfiltered gated audio and/or COS. On a Kenwood redio I had a similar requirement. I used the NHRC squelch board: http://www.nhrc.net/nhrc-squelch/ I tapped into raw discrimator audio from the Kenwood and with this board and was able to generate squelch logic that can generate either COS or use the logic to gate audio. Am I to assume you are trying to use this 2800 as a remote base? Is that correct? If so all you really need is COS, PL squelch (if desired) and either discrimator audio or deemphasized audio (line audio) to go into the controller. Normally, if you use COS input to a repeater controller you do not need to gate the RX audio. Some times this can end up being an art. More specific information is needed for your application and and I am sure some body can help... 73 Bernie Parker K5BP DARC Tech Officer --- In Repeater-Builder@yahoogroups.com, wb7cjq wb7cjq@ wrote: Does anybody know where to pick-off the squelched discriminator audio, the line level audio input and the COS signals ??? The schematic shows J309 that appears to have some of this stuff, but the connector is itty-bitty - I can't find a mating connector anywhere !!! I opened the radio this morning and just went sigh... MilSpec, and I'm not very interested in completely tearing the radio apart to get to needed signals. I suspect that most (if not all) of them are on the PCB that you see when you pull the lid. I went in with a tiny multimeter probe and touched a pin going to the front panel (in search of the COS - AKA Busy line) and mnaged to touch two tiny pins at the sametime. POOF! No more radio. Thank God for warranties. My 60 year old 'fat fingers' are too 'fat' for this micro type work, and I'm a skinny guy! Hope somebody has already chased these signals and can post the info. !!! Thanks, Dave WB7CJQ Hi Bernie! Yeah, bad choice of words. What I really meant was gated discriminator audio so that I don't have to build up a transistor switch to mute the audio upon loss oc signal. I had to do that years ago with an old Standard that I built into a repeater. UGH... Anyway, I see a 2SJ144 hanging between the volume pot and the audio amp., one side tied to ground. I'll bet this is the guy I'm after, but I can't get at it! Too tiny for me !!! Yes, this package is essentially a remote base, crossbanding between 2 meters and 440MHz. Thanks for the reply and the info.! Dave.
RE: [Repeater-Builder] 10 Meter Repeater
I was looking at the same general idea for combining a 2m repeater with 2 simplex radios (APRS and WinLink) on the same antenna - it MIGHT have worked - but I got the repeater on 440 which eliminated a lot of problems trying to work 4 frequencies within a 1mhz span. In general though - a hybrid ring isn't going to get you much more than 25-30db of isolation, so you will still need band pass filters between the RX/TX and the ring.. as much as needed to achieve the isolation needed based on your TX power . hehehe what do you make a cavity filter for 10 meters out of ?? two stacked beer kegs ??? hi hi :-) Note also that using a ring duplexer like this will pump any reflected power from the feed/antenna right back into the RX path. so everything needs to be extremely well matched. Feeding 100w into a 1.2:1 VSWR will pump nearly 0.1w back into the RX path, where the only thing slowing it down is your RX filters _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of DCFluX Sent: Tuesday, January 29, 2008 1:04 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] 10 Meter Repeater What about a Hybrid-Ring style duplexer? With 1 5/8 hardline and copper water pipe variable sections for tuning?
Re: [Repeater-Builder] Spectrum SCR500 Receiver
I have the SCR500 VHF Receiver Service Manual. It's over 5megs and I can't post it to the group files area, too big. I'll try to email it to you directly. 73, Joe, K1ike Chris wrote: Hello all, I have acquired an SCR500 Receiver in the VHF range. My ultimate goal is to connect this to an ACC RC96 controller, as a control receiver. However I do not have a manual for the receiverdoes anyone have one that they can email me. It would be greatly appreciated. Thanks Chris VE3CTP please email to [EMAIL PROTECTED] mailto:ve3ctp%40cogeco.ca
RE: [Repeater-Builder] motorola service manual help
Hi Keith, I have the Moxy VHF service manual. If you want let me know off list at (mour at sympatico dot ca) This is the second message. 73 Eric _ De : Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] De la part de Keith Envoyé : 28 janvier, 2008 12:52 À : Repeater-Builder@yahoogroups.com Objet : [Repeater-Builder] motorola service manual help Hello Group Sometime ago i asked for some help in locating a service manual for the vhf moxy but it seems that i did not get any reply s. I really can believe that no one has such of breed hiding somewhere I would really like to find a manual , once again its the vhf Motorola moxy . Thanks Keith ---va3kmc--
RE: [Repeater-Builder] VHF Multi-coupler harness question
Hi, The length of cable for low split 138-145MHz C2037 multi coupler is: 4 between reject and T FFF UG28A/U 4 between first pass and T FFF UG28A/U 12 between feed through T and Antenna T 24 between the other pass The length of cable is only for cable without connectors. Use RG-214 is the best on this thing. 73 and good work. Eric VE2VXT _ De : Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] De la part de vo1ken_2000 Envoyé : 28 janvier, 2008 20:56 À : Repeater-Builder@yahoogroups.com Objet : [Repeater-Builder] VHF Multi-coupler harness question I've been experimenting with a Sinclair 4 cavity C-Series VHF Multi- Coupler however have high loss between the antenna connector and the feed through connector. X | | - Connector to antenna | - Band-Pass Cans to 144.390 Tx/Rx | - Feedthrough connector to next multi-coupler | - Band Re-ject 144.390 The ex-commercial multi-coupler was factory tuned for 155MHz and I'm trying to rework it down to APRS (144.390) Can anyone point me to where I can find the formula to make up a new 4 connector cable? Any help would be greatly appreciated. Thanks Ken image002.jpg
[Repeater-Builder] Re: Yaesu FT-2800 Interface
Ok Dave, I'm still stumped a bit why you need gated audio. Is there not a controller? In other words, does this cross band link stay keyed all the time? 73 Bernie Parker K5BP DARC Tech Officer --- In Repeater-Builder@yahoogroups.com, wb7cjq [EMAIL PROTECTED] wrote: --- In Repeater-Builder@yahoogroups.com, dallasreact112 dallasreact112@ wrote: Hi, Squelched discriminator is a paradox of terms! Most of the time the squelch function is derived from the noise seen at the discriminator. I suspect you really mean either filtered (deemphasized) or unfiltered gated audio and/or COS. On a Kenwood redio I had a similar requirement. I used the NHRC squelch board: http://www.nhrc.net/nhrc-squelch/ I tapped into raw discrimator audio from the Kenwood and with this board and was able to generate squelch logic that can generate either COS or use the logic to gate audio. Am I to assume you are trying to use this 2800 as a remote base? Is that correct? If so all you really need is COS, PL squelch (if desired) and either discrimator audio or deemphasized audio (line audio) to go into the controller. Normally, if you use COS input to a repeater controller you do not need to gate the RX audio. Some times this can end up being an art. More specific information is needed for your application and and I am sure some body can help... 73 Bernie Parker K5BP DARC Tech Officer --- In Repeater-Builder@yahoogroups.com, wb7cjq wb7cjq@ wrote: Does anybody know where to pick-off the squelched discriminator audio, the line level audio input and the COS signals ??? The schematic shows J309 that appears to have some of this stuff, but the connector is itty-bitty - I can't find a mating connector anywhere !!! I opened the radio this morning and just went sigh... MilSpec, and I'm not very interested in completely tearing the radio apart to get to needed signals. I suspect that most (if not all) of them are on the PCB that you see when you pull the lid. I went in with a tiny multimeter probe and touched a pin going to the front panel (in search of the COS - AKA Busy line) and mnaged to touch two tiny pins at the sametime. POOF! No more radio. Thank God for warranties. My 60 year old 'fat fingers' are too 'fat' for this micro type work, and I'm a skinny guy! Hope somebody has already chased these signals and can post the info. !!! Thanks, Dave WB7CJQ Hi Bernie! Yeah, bad choice of words. What I really meant was gated discriminator audio so that I don't have to build up a transistor switch to mute the audio upon loss oc signal. I had to do that years ago with an old Standard that I built into a repeater. UGH... Anyway, I see a 2SJ144 hanging between the volume pot and the audio amp., one side tied to ground. I'll bet this is the guy I'm after, but I can't get at it! Too tiny for me !!! Yes, this package is essentially a remote base, crossbanding between 2 meters and 440MHz. Thanks for the reply and the info.! Dave.
[Repeater-Builder] Name this PL board.
Picture in group files http://ph.groups.yahoo.com/group/Repeater-Builder/photos/view/e85b?b=4 If you know what it is and/or have the pinout/docs for it I would appreciate an email back. Thanks! Ronny K4RJJ
Re: [Repeater-Builder] Re: Desense Problem on 222 MHz Repeater
At 1/29/2008 14:43, you wrote: nj902 wrote: The industry is beginning to develop practices to deal with PIM. Andrew has published some information regarding PIM in transmission lines as has Amphenol with respect to PIM in connectors. See also Intermodulation in Coaxial Connectors, RF Design, September 1996. Doesn't matter much at sites where the site owners won't even clean off abandoned crap (antennas, feedline) off the towers... (grumble grumble)... Nate WY0X So true. I've never had a connector be the source of an IMD problem, even the cheap chrome-plated ones. Not that I would use those anymore at comm. sites, but bad antennas/tower joints unprotected TXs have always been the culprits I've found. Bob NO6B
Re: [Repeater-Builder] Name this PL board.
Ronny wrote: Picture in group files http://ph.groups.yahoo.com/group/Repeater-Builder/photos/view/e85b?b=4 If you know what it is and/or have the pinout/docs for it I would appreciate an email back. Thanks! Ronny K4RJJ IIRC, it is a Com-Spec TS-32. Ed Yoho WA6RQD
Re: [Repeater-Builder] Name this PL board.
I'll shoot a better pic. I agree seeing it on the page it is pretty bad. Ken Arck wrote: At 09:07 PM 1/29/2008, you wrote: Ronny wrote: IIRC, it is a Com-Spec TS-32. Kinda hard to tell since the pic is so fuzzy but my best guess is an old Selectone... 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] Name this PL board.
At 09:07 PM 1/29/2008, you wrote: Ronny wrote: IIRC, it is a Com-Spec TS-32. Kinda hard to tell since the pic is so fuzzy but my best guess is an old Selectone... 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!
Re: [Repeater-Builder] Name this PL board.
I thought they all had DIP switches? I see a pot on the end that could be used to select a couple of tones. Ed Yoho wrote: Ronny wrote: Picture in group files http://ph.groups.yahoo.com/group/Repeater-Builder/photos/view/e85b?b=4 If you know what it is and/or have the pinout/docs for it I would appreciate an email back. Thanks! Ronny K4RJJ IIRC, it is a Com-Spec TS-32. Ed Yoho WA6RQD Yahoo! Groups Links
[Repeater-Builder] RE: EF Johnson CR1010 xtal replacement
Dang, sounded like a good idea at the time! Re: EF Johnson CR1010 xtal replacement
Re: [Repeater-Builder] Name this PL board.
Ralph. It's named, now. ;- Seriously, it reminds me of an old aftermarket board. Does it use round tone reeds? Joe M. Ronny wrote: Picture in group files http://ph.groups.yahoo.com/group/Repeater-Builder/photos/view/e85b?b=4 If you know what it is and/or have the pinout/docs for it I would appreciate an email back. Thanks! Ronny K4RJJ Yahoo! Groups Links
[Repeater-Builder] Re: EF Johnson CR1010 xtal replacement
1b. Re: EF Johnson CR1010 xtal replacement Posted by: Paul Finch [EMAIL PROTECTED] wb5idm Date: Mon Jan 28, 2008 5:23 pm ((PST)) Only one problem, with two of those things it's twice the money I have in any of my repeaters! Paul
[Repeater-Builder] NASA audio on IRLP?
Does anyone know of an IRLP reflector or node that has non-shuttle mission audio of the ISS comms on it?
