Re: [Repeater-Builder] A DB224E antenna...
Our club bought a new DB-224E a couple of years ago for around $650 and it has been a great performer. We oriented the top and bottom dipoles to the north where we needed the most gain and the two center dipoles to the south where our primary coverage is required. Our site is on a ridge overlooking the village to the south where most of our users are located. We replaced an ancient DB-224 which had been modified with 2 inch extensions on the top and bottom of each dipole to move it down into the ham band. The harness was in sad shape on the old one and was probably the reason we saw the remarkable improvement in coverage on the new antenna. Also the original antenna had one dipole on the north side and three on the south side of the pole. Our antenna extends above the top of a 30 ft wood pole barely above the trees. Our primary route into the area is in a canyon where this antenna performs with a lot of multipath and this problem was solved with a linked repeater with a figure 8 directional antenna sited alongside and oriented to cover the canyon. A home brew colinear array with 4 half wave elements was used for this antenna (a lazy H stood up on end). http://sbarcnm.org/gallery_code/Camelot-Rptr018.html 73 - Jim W5ZIT --- On Thu, 9/2/10, Ray Brown kb0...@sbcglobal.net wrote: From: Ray Brown kb0...@sbcglobal.net Subject: [Repeater-Builder] A DB224E antenna... To: Repeater-Builder@yahoogroups.com Date: Thursday, September 2, 2010, 8:26 PM Greetings. I'm the trustee of our local club's 2m repeater. It's NE of the big town of Joplin, MO. (147.210) What I want to find out, I'm going to ask our club to buy a new 224e antenna (assuming that this is the correct version needed for T147.210 R147.810), and arrange the elements on the north edge of the tower we're on so that 3 elements point to the SW, to favor our town so that HTs can work it, and one element to the ENE to point some energy to Springfield for working severe weather. Altho I'm thinking about trying to link the repeater with either EchoLink or some other repeater to Springfield and just point all 4 elements to the SW. :-) But it's on the north leg (that leg points to the north), so if pointing them to the SW gets the highest gain, that sounds great to me. :-) The point is that there's a DB224 there now, not sure if it's an E version or not, but I think it has some issues right now, so I'd rather just get a new one up and bring the old one down and go thru it at our leisure, plus reorienting it so that we can actually USE it. :-) Anyways, I wanted to know if anyone had one here that was in either new- in-box or barely used condition, how much $$ they go for nowadays, and how hard is it to reorient the elements if it was originally designed / set for omni (3, 6, 9, 12 o'clock). Thanks! Ray, KB0STN Trustee, W0IN
Re: [Repeater-Builder] MSR 2000 VHF Base Station questions
Dan, You should have no problem converting your unit to a repeater. The repeater builder web site has a whole section devoted to the MSR 2000. In my area we have converted many of these into repeaters and they work fine. If you want to upgrade your amp, let me know. I have a spare continuous duty amp I can part with. Jim - Original Message - From: wb0shn dan...@ckt.net To: Repeater-Builder@yahoogroups.com Sent: Sunday, August 29, 2010 18:41 Subject: [Repeater-Builder] MSR 2000 VHF Base Station questions Just acquired a MSR 2000 VHF base station at a Hamfest. It had a problem in the PA Deck (intermittent duty 100 watt version) but I have fixed that already (bad solder joint on one of the output transistors). It is a two receiver carrier squelch only model. I found a copy of the RF manual on the net to download, but have not been able to find a copy of the control deck manual yet. Does anyone know where I can get a PDF copy? Has anyone used one of these to build a two meter repeater? Will the Intermittent duty PA survive at half power? Any help would be appreciated. The machine is set up for wireline tone 2 frequency right now. Thanks, Dan Yahoo! Groups Links
[Repeater-Builder] Can a Master 3 narroband
I have a uhf master 4 that has been used for years as a paging exciter. Now the pager business is in the tank I would like to make the master 3 into aq repeater for commercial needs to replace a msr2000 because the msr cannot narroband. If the ge can't either I dont want to waste time and just buy a new repeater that can narroband. wb5...@grandecom.net
Re: [Repeater-Builder] Fw: DON'T BUY IT AND DON'T USE IT !!!------READ IT
Yes and *if* you just 'have to' comment on it, for goodness sake DELETE the garbage.rather then repeating the whole dumb thing as you comment about it. Jim- WA9FPT - Original Message - From: James Lee To: Repeater-Builder@yahoogroups.com Sent: Wednesday, August 25, 2010 12:11 PM Subject: Re: [Repeater-Builder] Fw: DON'T BUY IT AND DON'T USE IT !!!--READ IT Let's move on Please! Thank you...
Re: [Repeater-Builder] Adding capacitors to lower electric bill
Happens often from the small case to a large one...'Prosecutor Discretion' they choose which cases are prosecuted and which ones are not. Often for unexplained reasons or at least unexplained to me. Jim- WA9FPT - Original Message - From: Chuck Kelsey To: Repeater-Builder@yahoogroups.com Sent: Sunday, August 22, 2010 12:11 PM Subject: Re: [Repeater-Builder] Adding capacitors to lower electric bill Power theft seldom goes undetected, I'll agree. and the punishment is severe. Not always. I can cite where a customer drilled hole in electric meter glass to allow an object to be inserted to prevent disk from spinning. Case presented to district attorney. No prosecution. Same customer did same thing with water meter later on. Same result with district attorney - no prosecution. Go figure. Chuck WB2EDV
[Repeater-Builder] unsubscribe
I do not need to read these anymore. I am not mad just getting too many emails.
Re: [Repeater-Builder] unsubscribe
I will stay but switched to digest - Original Message - From: ka9qjg To: Repeater-Builder@yahoogroups.com Sent: Friday, August 13, 2010 8:15 PM Subject: RE: [Repeater-Builder] unsubscribe Hate to see Ya Go but if You must here is one More You will get , You subscribed and You have to Unsubscribe Yourself unless You get kicked off , At the Bottom of the Page You will see Where to do it You can also set up how You would like to receive the E-Mails 73 De Don KA9QJG From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jim in Waco WB5OXQ Sent: Friday, August 13, 2010 7:57 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] unsubscribe I do not need to read these anymore. I am not mad just getting too many emails. -- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.851 / Virus Database: 271.1.1/3069 - Release Date: 08/13/10 13:34:00
Re: [Repeater-Builder] Pager interference
You may have to put a can on the pager transmitter. Pagers use square waves which are very rich in harmonics and need to be filtered at the source. This may be the only way to remove the problem. I speak from experience. Jim wb5oxq in Waco - Original Message - From: Dwayne To: Repeater-Builder@yahoogroups.com Sent: Saturday, August 07, 2010 1:38 PM Subject: [Repeater-Builder] Pager interference Hi, I've got a new pager issue that has come up on a tower where we have a VHF repeater. It's about 400 watts erp and 15 feet horizontal distance and 4.3 and 4.7 MHz away (it switches). I'm thinking of using one bp/br can that will have the notch wide enough to cover both channels and one pass can on our RX freq. I can also add more pass cans or something like the DCI window filter. The real question is where to these can go and in what order. We have a standard Q-202 duplexer that worked fine before the pager was put in. I'm thinking that the pager cans will go on the RX side of the duplexer, but does it matter if the pass goes on the duplexer side or the RX side of the bp/br can? I'm kinda thinking that it doesn't matter, but want to do it right in case it does. Dwayne Kincaid WD8OYG -- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.851 / Virus Database: 271.1.1/3056 - Release Date: 08/07/10 01:28:00
Re: [Repeater-Builder] Adjusting low power on an R1225 repeater
The R100 likes to run at its rated power turning down will make it run hotter then if you leave it at the higher power they are not a good choice for a repeater tx. --- On Thu, 7/29/10, Joe k1ike_m...@snet.net wrote: From: Joe k1ike_m...@snet.net Subject: [Repeater-Builder] Adjusting low power on an R1225 repeater To: Repeater-Builder@yahoogroups.com Received: Thursday, July 29, 2010, 9:44 PM Hello to All, I want to turn the power down on my Motorola R1225 repeater to about 5 watts. It is the high power UHF version (25-45 watts). The reason for the low power is to drive a power amp at the output I want to achieve. Any drawbacks to running the R1225 this low? 73, Joe, K1ike
[Repeater-Builder] EP39-A Receiver power Supply
Found three in the garage. Anyone want them for the price of the shipping. Jim K7OET
Re: [Repeater-Builder] adding a 3/4meter repeater to my site?
John, You will get as many positive answers as you will negative. That said, the proper way would be 2 antennas and 2 runs of coax. If you already have the dual band antenna and want to go that route there are several things to watch out for. What is the power rating of your antenna? If you have 2 repeaters putting out 100 watts into an antenna rated at 100 watts, you will damage the antenna. At the ground end, you will need a diplexer to split the single run of coax into one for each repeater. The diplexer will have the same power restrictions as the antenna. Without keeping these two restrictions in mind, you may spend more $$ the second time around. Jim - Original Message - From: John fritzej...@gmail.com To: Repeater-Builder@yahoogroups.com Sent: Friday, July 23, 2010 08:49 Subject: [Repeater-Builder] adding a 3/4meter repeater to my site? I am sure this is a stupid question, or it seems so to me, but I can't find the answer anywhere. I am thinking about putting a 440 Mhz repeater (or link) for Packet at my 2M repeater site. Can I use the same coax and antenna (multi band) or do I need a complete seperate run? Hoping to save a chunk of change ;-) Of course I'll need seperate cavities and /or duplexer. Thanks, John K2QY Yahoo! Groups Links
Re: [Repeater-Builder] IC-F420
Thanks Matthew found the one needed --- On Sun, 7/18/10, Matthew Kaufman matt...@matthew.at wrote: From: Matthew Kaufman matt...@matthew.at Subject: Re: [Repeater-Builder] IC-F420 To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com Cc: repeater-builder@yahoogroups.com repeater-builder@yahoogroups.com Received: Sunday, July 18, 2010, 11:22 AM The EF Johnson equivalent is online. If that doesn't help I can post a copy when I get back to my desk. Matthew Kaufman (Sent from my iPhone) On Jul 18, 2010, at 7:54 AM, jim law lawsign...@yahoo.com wrote: Does anyone have a service manual for a IC-F420 Thanks Jim Yahoo! Groups Links
[Repeater-Builder] Mastr lll cabinet
I need a 38 Mastr lll cabinet. Anyone on the West Coast has a extra one they would like to part with. Thanks, Jim K7OET
[Repeater-Builder] FTS-12 tone deck
WTB. I'm trying to get a Yaesu FT-33R HT on the air for repeater use and I need an FTS-12 Tone deck for it. Will consider an inoperative or parts rig with a good tone deck. FTT-4 Touch Tone pad would be a plus. E-mail to n8...@arrl.net. TNX/73
Re: [Repeater-Builder] GE continuous duty amp
PL19D417535G1 and the REV # is blank. This came from a local organization and was in the 154.XXX range. - Original Message - From: Eric Lemmon wb6...@verizon.net To: Repeater-Builder@yahoogroups.com Sent: Sunday, July 04, 2010 00:57 Subject: RE: [Repeater-Builder] GE continuous duty amp What is the model number of your surplus amplifier? 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of WA2RJP Sent: Saturday, July 03, 2010 5:39 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] GE continuous duty amp I have a VHF HI 40 watt continuous duty amp that is surplus to my needs. Would anyone be willing to trade for a 6 meter version? This is a working unit that was removed from a station conversion project. Yahoo! Groups Links
Re: [Repeater-Builder] 220 duplexers
Stan, I sent something to your personal email the other day. Have you seen it? It may be what you need. Jim WA2RJP - Original Message - From: Stan To: Repeater-Builder@yahoogroups.com Sent: Saturday, May 29, 2010 07:29 Subject: Re: [Repeater-Builder] 220 duplexers Well I don't know how you guys got the idea I am going to leave a bunch of junk on our tower, but that is not the case. Sorry. IF we stay on this tower we will replace the antenna, IF we move, the old tower will be removed. There will not be a next guy. I am simply looking for 220 duplexers for our single 220 antenna that is left there for now... And if all goes as planned, we are very lucky... Stan From: Mike Morris Sent: Saturday, May 29, 2010 12:36 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] 220 duplexers Chucks right on the money. Do the next guy a favor and remove the useless junk from the tower. See this article: http://www.repeater-builder.com/antenna/cracking.html Mike WA6ILQ At 05:42 AM 05/28/10, you wrote: I understand the move and money issue. Be aware that any loose hardware and/or damaged antenna can, and often does, generate noise all on it's own when hit with an RF source - your repeater or some other nearby transmitter. Good luck with the move. And you got very lucky if you land a cell tower location for a good price. Chuck WB2EDV - Original Message - From: Stan To: Repeater-Builder@yahoogroups.com Sent: Friday, May 28, 2010 8:36 AM Subject: Re: [Repeater-Builder] 220 duplexers Hi Chuck, The tower is 150' up and I keep forgetting my binoculars. But I think the elements are simply blown away. The cable appears to be still intact. AND we are expecting to move over to a new Cell Tower location soon and don't want to put a lot of work and money into the current tower. And I shut the 220 repeater down so it will not create any noise. Thanks Stan From: Chuck Kelsey Sent: Friday, May 28, 2010 8:14 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] 220 duplexers I never like the idea of leaving a known bad antenna on a tower. It will eventually become a noise generator. Yes, sometimes you can get away with it, but it's a real gamble. And if there are other services nearby, you could be bothering them and not know it. Chuck WB2EDV - Original Message - From: Stan To: Repeater-Builder@yahoogroups.com Sent: Friday, May 28, 2010 8:04 AM Subject: Re: [Repeater-Builder] 220 duplexers The bad antenna is the Rx antenna. It won't hear beyond about a mile after a heavy wind storm. So swapping is not an option. Stan -- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.819 / Virus Database: 271.1.1/2901 - Release Date: 05/28/10 02:25:00 Emoticon1.gif
RE: [Repeater-Builder] Techniques for combining multiple audio sources
Using the Arcom RAD board, single delay for all inputs, hence needing to mix things. Not got those jumpers, it's the earlier RAD version. Jim _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jeff Ackerman Sent: 16 May 2010 09:09 To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Techniques for combining multiple audio sources what are you using? are Arcom? or Scom? If your using a arcom, take the jumper out of the delay board headers that jump the audio for each port, bring the audio out line (JP10-2,JP11-2,JP12-2) from each header into a mixer, run the output of the mixer to the audio input pin on the delay board, then just split the output of he delayboard however you want to, to the audio input pin on the delay board header (JP10-3,JP11-3,JP12-3), then you can set each tx level via the onboard pots. Not sure on the scom, have to look at a schematic. Thats the concept anyways. On Fri, May 14, 2010 at 2:49 PM, Jim (List) jim.l...@stuckinthemud.org wrote: I'm in the process of building a repeater that will have multiple ports (3 different radios). Only one radio be receiving at a time, the other two transmitting. Therefore I have 3 audio sources (from different types of radio, at different levels), each being fed to the other two radios and requiring individual settings. In the middle of this I want to put a delay board, but to keep the cost down only have one. What's the best arrangement for combining the incoming audio, and then setting the levels for each TX? Thinking along the lines of a FET audio mixer for each RX, setting all to the same level of input to the delay board, then something on the output from the delay (would I need another series of buffers, or would three 100k pots do?) to adjust the TX level for each radio type? Thanks for any advice! Jim
[Repeater-Builder] Re: FS: Test Panel, Moto TEK-5C
Tom, Yes, that may be great, but you see, I don't know and I'm not going to research that info for the offering price. A pic is available for those who are interested in the test set. Regards, Jim M ... Re: FS: Test Panel, Moto TEK-5C http://groups.yahoo.com/group/Repeater-Builder/message/100510;_ylc=X3oDMTJycTN1YTEwBF9TAzk3MzU5NzE1BGdycElkAzEwNDE2OARncnBzcElkAzE3MDUwNjMxMDgEbXNnSWQDMTAwNTEwBHNlYwNkbXNnBHNsawN2bXNnBHN0aW1lAzEyNzM4MzAzMjA- Posted by: Thomas Oliver tsoli...@tir.com mailto:tsoli...@tir.com?subject=%20re%3a%20fs%3a%20%20test%20panel%2c%20moto%20tek-5c n8ies http://profiles.yahoo.com/n8ies Thu May 13, 2010 9:50 pm (PDT) You might want to list witch radios the cables work with that come with the test set. tom .
[Repeater-Builder] Techniques for combining multiple audio sources
I'm in the process of building a repeater that will have multiple ports (3 different radios). Only one radio be receiving at a time, the other two transmitting. Therefore I have 3 audio sources (from different types of radio, at different levels), each being fed to the other two radios and requiring individual settings. In the middle of this I want to put a delay board, but to keep the cost down only have one. What's the best arrangement for combining the incoming audio, and then setting the levels for each TX? Thinking along the lines of a FET audio mixer for each RX, setting all to the same level of input to the delay board, then something on the output from the delay (would I need another series of buffers, or would three 100k pots do?) to adjust the TX level for each radio type? Thanks for any advice! Jim
[Repeater-Builder] Re:Web site issues???
Here's what Google tells me about this site: Quote: Safe Browsing /Diagnostic page for/ repeater-builder.com *What is the current listing status for repeater-builder.com?* Site is listed as suspicious - visiting this web site may harm your computer. Part of this site was listed for suspicious activity 1 time(s) over the past 90 days. *What happened when Google visited this site?* Of the 3 pages we tested on the site over the past 90 days, 2 page(s) resulted in malicious software being downloaded and installed without user consent. The last time Google visited this site was on 2010-04-07, and the last time suspicious content was found on this site was on 2010-04-07. Malicious software is hosted on 1 domain(s), including imgdownloads.com/ http://safebrowsing.clients.google.com/safebrowsing/diagnostic?client=Firefoxhl=en-USsite=imgdownloads.com/. This site was hosted on 1 network(s) including AS11798 (BLUEHOST) http://safebrowsing.clients.google.com/safebrowsing/diagnostic?client=Firefoxhl=en-USsite=AS:11798. *Has this site acted as an intermediary resulting in further distribution of malware?* Over the past 90 days, repeater-builder.com did not appear to function as an intermediary for the infection of any sites. *Has this site hosted malware?* No, this site has not hosted malicious software over the past 90 days. *How did this happen?* In some cases, third parties can add malicious code to legitimate sites, which would cause us to show the warning message. *Next steps:* * Return to the previous page. http://safebrowsing.clients.google.com/safebrowsing/diagnostic?client=Firefoxhl=en-USsite=http://www.repeater-builder.com/maxtrac/maxtrac-index.html# * If you are the owner of this web site, you can request a review of your site using Google Webmaster Tools http://www.google.com/webmasters/tools/. More information about the review process is available in Google's Webmaster Help Center http://www.google.com/support/webmasters/bin/answer.py?answer=45432. Updated 12 hours ago UnQuote: Cheers, Jim M
[Repeater-Builder] GE Exec II UHF Station equipment
The GSA is auctioning off some GE Exec II desk stations repeater stuff from the Nevada Test Range: http://gsaauctions.gov/gsaauctions/aucdsclnk?sl=91QSCI10177704 http://gsaauctions.gov/gsaauctions/aucdsclnk?sl=91QSCI10177705 http://gsaauctions.gov/gsaauctions/aucdsclnk?sl=91QSCI10177706 Auction closes 3/30/2010 at 3:22 PM CST Cheers.
Re: [Repeater-Builder] General Electric VHF MVS Series Mobile
John, If you haven't already gotten a response, the flat end is ground, the center is hot and the pointy end is ignition sense. good luck. Jim - Original Message - From: jjhy...@att.net To: Repeater-Builder@yahoogroups.com Sent: Tuesday, March 23, 2010 19:26 Subject: [Repeater-Builder] General Electric VHF MVS Series Mobile Hi Gang - Just a quick question to see if anyone knows how to power up this mobile to check for functionality without the use of its natural power cable? This unit has 3 prongs aligned with each other and my goal is to fire it up with an external power supply and alligator clips. If, assuming the pointed end of the power plug is facing upward, which prong would be the hot (Positive) and which one to ground / negative? Any advice would be helpful! Thanks in advance and 73s John
Re: [Repeater-Builder] Tram Titan III 3 Information?
The Tram Titan original and Titan 2 were both high ene CB radios. The 3 may also be a CB radio. - Original Message - From: Chris To: Repeater-Builder@yahoogroups.com Sent: Thursday, February 25, 2010 3:58 PM Subject: [Repeater-Builder] Tram Titan III 3 Information? I have a tram titan 3 radio that I am looking for information on. I have the manual and the radio does power on. from the manual it lists freqs. in 20 MHz. I'm looking to sell it so any information about the radio is appreciated! -- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.733 / Virus Database: 271.1.1/2710 - Release Date: 02/25/10 13:57:00
Re: [Repeater-Builder] Tram Titan III 3 Information?
I checked and this is a CB radio with a 20mhz master systhesizer oscillator. It might be capable of being moved to 10 meter ham band and it is an all mode radio. - Original Message - From: Chris To: Repeater-Builder@yahoogroups.com Sent: Thursday, February 25, 2010 3:58 PM Subject: [Repeater-Builder] Tram Titan III 3 Information? I have a tram titan 3 radio that I am looking for information on. I have the manual and the radio does power on. from the manual it lists freqs. in 20 MHz. I'm looking to sell it so any information about the radio is appreciated! -- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.733 / Virus Database: 271.1.1/2710 - Release Date: 02/25/10 13:57:00
Re: [Repeater-Builder] Re: Can the 4th harmonic of 1250 AM keep UHF repeaters locked up?
Is it possible the AM signal is getting into an audio stage instead of the receiver front end? I had that happen once. - Original Message - From: KT9AC kt...@ameritech.net To: Repeater-Builder@yahoogroups.com Sent: Tuesday, February 23, 2010 4:01 PM Subject: Re: [Repeater-Builder] Re: Can the 4th harmonic of 1250 AM keep UHF repeaters locked up? I was able to match up the audio coming through the repeater and the local AM station. My latest theory is that their signal is so strong that its blowing into the receiver's front end and multiplying/mixing there (past the bandpass filters and all). They are heterodyne receivers after all. I'm considering an ICE broadcast high-pass filter that cuts off at 1.8Mhz (model 402). I have an email into them to see how well it might work at 448 Mhz. Tony tracomm wrote: Had a similiar situation at our site, a station on 106.7 MHz, music on hang time on many repeaters, intermod runs gave no clue to reason, did all the usual, grounding, filters no resolve. Turned out to be the STL Marti system on 450.100 MHz, from an close studio site pointed right at our site, hitting our Rx multicoupler, mixing with our transmitters. Resolution was low passs isolater on the STL system. Make certain which station the broadcast audio is coming from and give the station engineer a friendly call, may reveal some info to help your issue. Chris GMRS Inc. --- In Repeater-Builder@ yahoogroups. com mailto:Repeater-Builder%40yahoogroups.com, Tony KT9AC kt...@... wrote: Hi everyone, A while ago I was troubleshooting a bad feedback or growl problem that was impacting a UHF repeater, of which the short term workaround was to not encode TX PL (PL or DPL would keep it locked until the signal dropped enough or timed out). In doing some more research, I found a 1250kHz AM station within a mile or two that changes pattern between day and night. The interference mentioned above would appear around drive times (like 5pm) so that had me chasing other sources. Still, it was puzzling that a 5Mhz signal could be causing the feedback (it didn't appear when doing normal receiver testing with a service monitor). The recent give away was that I could hear talking underneath my test signal (like a sports show). So, if we take the 1250Khz signal or 1.25Mhz x 4 = 5Mhz. I realize that the 4th harmonic of a 5KW broadcast station isn't very powerful, but being in its nearfield might be enough to cause a mix with the UHF transmit output. Does this make sense? This phenomenon can be duplicated with both a 450 and 440 repeater system - both with standard 5Mhz offsets. I don't think any sort of filtering would work since the mix happens in the air. Only by having split PL's can the lockup be prevented, and equipment was both MSF5000 and Micor systems, through correctly tuned duplexers. Thanks, Tony Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: repeater-builder-dig...@yahoogroups.com repeater-builder-fullfeatu...@yahoogroups.com * To unsubscribe from this group, send an email to: repeater-builder-unsubscr...@yahoogroups.com * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Motorola cabinet key wanted
Well I'd try a 2 3 3 5, fits where a 2 1 3 5 goes and may do the job. Jim- WA9FPT - Original Message - From: Gary Schafer To: Repeater-Builder@yahoogroups.com Sent: Tuesday, February 23, 2010 9:54 PM Subject: RE: [Repeater-Builder] Motorola cabinet key wanted Hi Bill, The key is like a 2135 and a 2135 will fit in the lock (I have a 2135) but it will not open it. I actually have two of these station cabinets and my 2135 key will not open either cabinet. I kind of remember that some of the cabinets had a different key from the mobiles way back when. Any other guesses? Thanks Gary K4FMX -- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Bill Hudson Sent: Tuesday, February 23, 2010 10:37 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Motorola cabinet key wanted Just because I gamble a little - I'm going to bet that the older Motorola cabinet is a CH751. This is a one sided key unlike a 2135. The Micor cabinets became a 2553. Cabinet Keys more prominent in the high power stations. I'll go along with the BF10a for the Prog Line - that's for sure. Bill Hudson W6CBS -- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Andrew Seybold Sent: Tuesday, February 23, 2010 6:18 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Motorola cabinet key wanted The Motorola key should be a 2135 and the GE Key is probably a BF10A, they are hard to find but around-I can make you copies if you want to pay the key making price and postage. Andy W6AMS From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Gary Schafer Sent: Tuesday, February 23, 2010 6:16 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Motorola cabinet key wanted I am in need of a cabinet key for an old Motorola base station cabinet. It is an old low band 1/4 kw rig. Had 100TH tubes in final. This is the 6 foot tall cabinet. Anyone know the key number for these? Have a key? Also have an old GE progress line base cabinet that needs a key. This cabinet is about 3 feet tall and longer than wide. Thanks! Gary K4FMX
Re: [Repeater-Builder] Motorola cabinet key wanted
Dumb fingers... make that #2 5 5 3. Jim- WA9FPT - Original Message - From: Gary Schafer To: Repeater-Builder@yahoogroups.com Sent: Tuesday, February 23, 2010 9:54 PM Subject: RE: [Repeater-Builder] Motorola cabinet key wanted Hi Bill, The key is like a 2135 and a 2135 will fit in the lock (I have a 2135) but it will not open it. I actually have two of these station cabinets and my 2135 key will not open either cabinet. I kind of remember that some of the cabinets had a different key from the mobiles way back when. Any other guesses? Thanks Gary K4FMX -- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Bill Hudson Sent: Tuesday, February 23, 2010 10:37 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Motorola cabinet key wanted Just because I gamble a little - I'm going to bet that the older Motorola cabinet is a CH751. This is a one sided key unlike a 2135. The Micor cabinets became a 2553. Cabinet Keys more prominent in the high power stations. I'll go along with the BF10a for the Prog Line - that's for sure. Bill Hudson W6CBS -- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Andrew Seybold Sent: Tuesday, February 23, 2010 6:18 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Motorola cabinet key wanted The Motorola key should be a 2135 and the GE Key is probably a BF10A, they are hard to find but around-I can make you copies if you want to pay the key making price and postage. Andy W6AMS From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Gary Schafer Sent: Tuesday, February 23, 2010 6:16 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Motorola cabinet key wanted I am in need of a cabinet key for an old Motorola base station cabinet. It is an old low band 1/4 kw rig. Had 100TH tubes in final. This is the 6 foot tall cabinet. Anyone know the key number for these? Have a key? Also have an old GE progress line base cabinet that needs a key. This cabinet is about 3 feet tall and longer than wide. Thanks! Gary K4FMX
Re: [Repeater-Builder] Re: Motorola cabinet key wanted
That's what I said !...made a mistake on the first posting. Jim- WA9FPT - Original Message - From: cracked To: Repeater-Builder@yahoogroups.com Sent: Tuesday, February 23, 2010 10:23 PM Subject: [Repeater-Builder] Re: Motorola cabinet key wanted You mean 2553 right? James K7ICU --- In Repeater-Builder@yahoogroups.com, Jim McLaughlin dearbo...@... wrote: Well I'd try a 2 3 3 5, fits where a 2 1 3 5 goes and may do the job. Jim- WA9FPT - Original Message - From: Gary Schafer To: Repeater-Builder@yahoogroups.com Sent: Tuesday, February 23, 2010 9:54 PM Subject: RE: [Repeater-Builder] Motorola cabinet key wanted Hi Bill, The key is like a 2135 and a 2135 will fit in the lock (I have a 2135) but it will not open it. I actually have two of these station cabinets and my 2135 key will not open either cabinet. I kind of remember that some of the cabinets had a different key from the mobiles way back when. Any other guesses? Thanks Gary K4FMX --\ -- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Bill Hudson Sent: Tuesday, February 23, 2010 10:37 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Motorola cabinet key wanted Just because I gamble a little - I'm going to bet that the older Motorola cabinet is a CH751. This is a one sided key unlike a 2135. The Micor cabinets became a 2553. Cabinet Keys more prominent in the high power stations. I'll go along with the BF10a for the Prog Line - that's for sure. Bill Hudson W6CBS --\ -- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Andrew Seybold Sent: Tuesday, February 23, 2010 6:18 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Motorola cabinet key wanted The Motorola key should be a 2135 and the GE Key is probably a BF10A, they are hard to find but around-I can make you copies if you want to pay the key making price and postage. Andy W6AMS From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Gary Schafer Sent: Tuesday, February 23, 2010 6:16 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Motorola cabinet key wanted I am in need of a cabinet key for an old Motorola base station cabinet. It is an old low band 1/4 kw rig. Had 100TH tubes in final. This is the 6 foot tall cabinet. Anyone know the key number for these? Have a key? Also have an old GE progress line base cabinet that needs a key. This cabinet is about 3 feet tall and longer than wide. Thanks! Gary K4FMX
[Repeater-Builder] Re: Micor Community Repeater Supplement
Thanks Jeff. It appears that that supplement is needed badly. Jim --- In Repeater-Builder@yahoogroups.com, Mark n9...@... wrote: Thanks Jeff. I've been meaning to do that as well, but just haven't gotten around to it... My apologies to Eric and the group for my negligence. Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of Jeff DePolo For those of you that are interested in the community repeater manual, Eric Lemmon has volunteered to scan it. I'll be sending it to him this weekend, along with some other specialized Micor manuals including PURC, Digital PURC (DRC), and Multiple PL. --- Jeff WN3A -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of Jeff DePolo I am in need of a micor UHF community repeater station supplement number is 68-81025E55, or 68P81025E55. Email me at my callsign at yahoo Jim I have it in paper, but not electronic. Is there a particular section you need that I could scan? --- Jeff WN3A
[Repeater-Builder] Re: Micor Community Repeater Supplement
Jeff I am converting a micor uhf community repeater to the ham band. What I really need is the entire supplement. I am just starting to set up the repeater so I am flying blind without it. I am trying to find someone who has one they do not need, or can scan, or copy so I can have a full copy as the project progresses. Maybe someone will post that they have one for sale. Thanks Jim --- In Repeater-Builder@yahoogroups.com, Jeff DePolo j...@... wrote: I am in need of a micor UHF community repeater station supplement number is 68-81025E55, or 68P81025E55. Email me at my callsign at yahoo Jim I have it in paper, but not electronic. Is there a particular section you need that I could scan? --- Jeff WN3A
[Repeater-Builder] Micor Community Repeater Supplement
I am in need of a micor UHF community repeater station supplement number is 68-81025E55, or 68P81025E55. Email me at my callsign at yahoo Jim
Re: [Repeater-Builder] Which Antenna Analyzer?
The MFJ analyzers have very limited use around an RF active site. Any RF picked up by the antenna being checked will interfere with the readings on the analyzer. I even had problems recently trying to check the SWR on a horizontal loop antenna for HF, when a high power AM broadcasting station about 5 miles away was on the air. RF picked up by the loop prevented the analyzer from reading the SWR. The only reliable way I know is a Bird 43 and a transmitter to check the SWR. Even then you have to avoid using the low power slugs as the RF picked up by the antenna from nearby transmitters will cause an error in checking the performance of the antenna under test. 73 - Jim W5ZIT --- On Sun, 1/31/10, John Transue jtran...@cox.net wrote: From: John Transue jtran...@cox.net Subject: [Repeater-Builder] Which Antenna Analyzer? To: Repeater-Builder@yahoogroups.com Date: Sunday, January 31, 2010, 10:26 AM I would like to have an antenna analyzer. The most common with hams seems to be the MFJ analyzers, but I am not a fan of MFJ. So, what do you all use? I'd like the analyzer to cover HF through ham UHF. It would be nice to have it tell me the sign of the reactance, but I guess this can be easily inferred by varying the frequency around the resonance. Thanks in advance for your views and experience. John
Re: [Repeater-Builder] Duplexer vs Split Level Antennas
Allan, my mobile radio was a GE Progress line - either 30 or 60 Watts. I had both and don't remember which I used most of the time. The antenna at 1000 ft was connected to some kind of commercial solid state converter (which I don't recall) and 1000 ft of RG-58 (at 10 meters) carried the signal down the tower. The repeater was an elaborate system with the 146.34/94 as the main machine. There was at least one other open repeater on 146.16/76 which was for use in the Ft Worth area only. The transmitting antenna was on the west side of the tower and it was pretty much shielded from the east toward Dallas. Unfortunately, the receive antenna at 1000 ft prevented coordination of another 16/76 repeater for 150 miles to the east. At 90 miles we asked for 16/76 but were assigned the 'odd' frequency of 19/79. I think there were other 'private' repeaters as part of the system using CTCSS access. The trustee was Harold Reisor W5SXK and he had the hub for the system at his QTH. I never got to see any of the gear, but heard about it in bits and pieces over several years. As I understood it, each receiver connected to the 10 meter down converter was connected to a 420 transmitter linking to Harold's house. There he cross connected to a 420 link back to the transmitter site for each of the transmit frequencies. Interestingly enough, he also had a 94 receiver linked to his house, and one evening when we had some extended propagation, he linked the 94 receiver to the 94 transmitter. The Little Rock Arkansas 34/94 repeater was loud and clear on the 94 receiver in Ft Worth and although there was a honk each time a local station on the Ft Worth 94 repeater let up, as soon as another station keyed down on 34 he was repeated on 94 with no problem. This just illustrates how much isolation the 34/94 system in Ft Worth gained with the 500 ft separation on the receive and transmit antennas. The signal on 94 from Little Rock was that much stronger than the local transmitter on 94. As I understood it, the 34/94 repeater in Little Rock also had the capability (by the control op) of listening on 94 and retransmitting on 94 and several QSOs were had between stations in the coverage of the Ft Worth repeater with stations on the Little Rock repeater, with the two repeaters linked on 94. This is a recollection from back in the early '70s' in the last century so hope I have remembered it right. It was the most robust repeater we had in the area till they put up the big towers at Cedar Hill and a few repeaters gained access to antennas at 1500 ft. 73 - Jim W5ZIT --- On Fri, 1/29/10, allan crites wa9...@arrl.net wrote: From: allan crites wa9...@arrl.net Subject: Re: [Repeater-Builder] Duplexer vs Split Level Antennas To: Repeater-Builder@yahoogroups.com Date: Friday, January 29, 2010, 5:13 AM Jim That's a very interesting posting of the repeater(s) you were aware of and worked reliably from some 90 miles away in Texas. Perhaps you could provide us some of the parameters of the installation, like the receive antenna used at the 1000' level, the type converter used to convert the received signals to 10 M , the transmit antenna (any one will do) at 500', the coax used to connect it to the transmitter, and the PO of the transmitter. I'm not sure I understood you correctly about the coax downlead you indicated was connected to the receive antenna, was it RG-58 from the top of the tower to the receivers below or some other type coax? Also what was the PO of the GE mobile you were using? Thanks Allan Crites WA9ZZU
Re: [Repeater-Builder] Alinco DR-135 and RLC-4
I have used a pair of DR radios in a cross band repeater and all the signals you will need are present on the DB9 connector. Use the 1200 Baud packet connections and you will be all set. Realize that the COS output is an open collector that keys to ground, so you will have to use a pull up resistor to interface the RLC-4. The radios are configured so that if you wanted, you can directly connect the COS to the PTT of the other radio and connect the audio out to the audio in of the other radio and they will repeat. 73 - Jim W5ZIT --- On Sat, 1/30/10, ve6cpu satk...@inetdesign.org wrote: From: ve6cpu satk...@inetdesign.org Subject: [Repeater-Builder] Alinco DR-135 and RLC-4 To: Repeater-Builder@yahoogroups.com Date: Saturday, January 30, 2010, 12:10 AM Just a warning up front. I'm really new to the RLC-4. I've done 1200bps packet on a bunch of different radios. I've got my hands on a RLC-4 that I'm thinking of hooking up to a pair of dr-135 radios. Looking at the docs on the both the controller and the radio it seems I could use the 9 pin din on the back of the alinco to run audio and COS to and from the controller. Just wondering if anyone out there has tried this before? Is this something that can be done easily or do I have to get in to the radio and pull the audio and COS from somewhere else? I don't want to hurt either piece of equipment just trying things out. Thanks for any help you can provide. Stephen VE6CPU
Re: [Repeater-Builder] Duplexer vs Split Level Antennas
One of the best working repeaters I have run across was located on the outskirts of Ft Worth Texas on a 1000 ft tower. It used a single receive antenna at 1000 ft into a down converter that output on 10 meters. Several 10 meter receivers were connected to the RG-58 downlead in the radio room at the bottom of the tower. Each transmitter used a separate antenna at 500 ft and it was one of the best coverage repeaters for the flatlands that I have seen. I could reliably work it from 90 miles away with my mobile GE Prog. Vertical split antennas can work very well indeed. 73 - Jim W5ZIT --- On Thu, 1/28/10, wb0goa aero...@gmail.com wrote: From: wb0goa aero...@gmail.com Subject: [Repeater-Builder] Duplexer vs Split Level Antennas To: Repeater-Builder@yahoogroups.com Date: Thursday, January 28, 2010, 1:49 PM Have chance to install a DB 224 at 450' and another one anywhere below it. Using LDF6 on both runs. RF solid state 110 watts out. Wanting to know the pros or cons of running both antenna close together for more height with duplexer or spacing antennas for isolation without duplexer?
RE: [Repeater-Builder] FS- Motorola R100 UHF Repeaters
All you need is the programming cable an the right software witch i have you can email me if you like Jim tmyr...@xcelco.on.ca --- On Wed, 1/20/10, N9WYS n9...@ameritech.net wrote: From: N9WYS n9...@ameritech.net Subject: RE: [Repeater-Builder] FS- Motorola R100 UHF Repeaters To: Repeater-Builder@yahoogroups.com Received: Wednesday, January 20, 2010, 2:04 AM Dave, This is your best resource for information regarding your inquiry: http://www.repeater -builder. com/motorola/ r100/r100- index.html Mark – N9WYS From: Repeater-Builder@ yahoogroups. com [mailto:Repeater- buil...@yahoogro ups.com] On Behalf Of Dave Hubbell Whats involved in making these work on ham band? Dave On 1/16/2010 9:10 AM, tracomm wrote: For sale--Motorola R-100 UHF Repeaters UHF, now on 461/466 MHz. 110 vac or 12 vdc 4 units- Complete, clean 2 ea. Power out, working when removed 1 ea. ½ watt output 1 ea. Power up, no tx or rx no further checking Model H5016B (3) H5018 (1) 1 ea ComSpecTP3200 Controller with cable to R-100 Make great link repeaters #1- H5016B 794FRW0114 ½ watt output #2- H5016B 794FSA0173 28 watts output #3- H5018B 794FPS0081 No tx/No rx #4- H5016B 376FPL0087 24 watts output Sold as a package $500.00 plus UPS Shipping weight 2 boxes, 75 lbs ea. Shipped from 48088 trac...@aol. com No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.432 / Virus Database: 270.14.150/2632 - Release Date: 01/19/10 07:34:00 __ Be smarter than spam. See how smart SpamGuard is at giving junk email the boot with the All-new Yahoo! Mail. Click on Options in Mail and switch to New Mail today or register for free at http://mail.yahoo.ca
Re: [Repeater-Builder] Repeater Linking
The best way is to have the pl drop when the cor drops --- On Wed, 1/20/10, Jerry gdste...@yahoo.com wrote: From: Jerry gdste...@yahoo.com Subject: [Repeater-Builder] Repeater Linking To: Repeater-Builder@yahoogroups.com Received: Wednesday, January 20, 2010, 6:05 PM OK, I know I've mentioned this before, but I think I'm on to something now... I wanted to have a stand alone repeater linker, kind of a crossband repeater, that would link uhf and vhf repeaters together without needing to make any changes to either repeater. The problem I ran into is when the first repeater finishes transmitting, the linker will hear the second repeater (if the pl doesn't drop out) and will key up the first repeater again. This cycle will continue until you turn off the linker. I tried this with my crossband radio and it causes the same problem. One solution is to have the repeater controller stop transmitting their pl right after the COR drops. Not all repeaters do this, so you would have to be selective as to which repeaters you link. The solution I came up with today is to use a microcontroller with a built in a/d converter. If after the first repeater stops transmitting, the microcontroller can sample the audio coming from the second repeater. If I go through a high pass filter, I should (might) be able to determine if the audio is 'dead air', a courtesy tone, or someone talking. If it's dead air or a tone, I won't key the linker. I can then wait for the COR from the second repeater to drop, or listen for audio. Do you think it will work? - Jerry __ Yahoo! Canada Toolbar: Search from anywhere on the web, and bookmark your favourite sites. Download it now http://ca.toolbar.yahoo.com.
Re: [Repeater-Builder] RE: follow up on lightening strike last spring response
Richard (and everyone else), I just uploaded a file called antenna_pix.pdf to the group. Our local group had an antenna that was real noisy when duplexed but worked great otherwise. We spent months trying to fix the issue then decided to replace the antenna. Just goes to show noise issues could be anywhere. I hate tower rats! Jim WA2RJP - Original Message - From: Richard To: Repeater-Builder@yahoogroups.com Sent: Sunday, January 17, 2010 13:47 Subject: [Repeater-Builder] RE: follow up on lightening strike last spring response Sorry if I've been late in posting. First, the antenna and hard line is ok. We've tested that part out and its working. We think ( I ) that we got zapped through a unused phone line which is mounted behind the repeater rack. Yes, we have tested the can's using both a IRL (?sp) and a General Dynamics service monitor. They were taken apart and cleaned and retuned. Everything indicated they were functioning normally. Till we put them back in service. I don't know if they were tested with a dummy load. The technicians made many trips to the site: the technicians worked for the company that we rent the site from. We replaced all of the connectors and only found one that had scorched indications on it, but that was all. I asked if any of you knew how to find out if a can was operational, because all the test equipment that was used indicated they were ok. We finally found a workable solution. We added a fifth can, tuned to the transmit freq. That stoped the crackling noise. Now we're going to replace the can's, and go with a 6 can configuration. this is what was reconmended by the technician. Rich K8JX www.w8usa.org
Re: [Repeater-Builder] Celwave/Sinclair, etc. antenna conversion to 2-Meters?
I have converted quite a few DB-224 antennas that were originally used in the 155 mHz range down to the 146 mHz range by adding a folded aluminum tubing stub to the top and bottom of each element. Using the folded tubing from a defunct TV antenna I flatten about 3 inches on one end and then wrap it around the top and bottom loops of the antenna. A hole drilled through the flattened metal allows a screw and nut to be used to clamp the stub to the element. There is no dissimulator metal problem with this aluminum to aluminum connection. After installation I cut the length of the stub to 2 inches. This has brought every antenna I have modified down to the 146 center frequency without having to modify the harness. SWR is not perfect without the harness mod, but is sure a lot less trouble. These antennas are perfectly usable with no modification at all in the ham band, but an improvement in the SWR can be had with this simple mod. This mod has been discussed on this forum several times. 73 - Jim W5ZIT --- On Fri, 1/15/10, larryjspamme...@teleport.com lar...@teleport.com wrote: From: larryjspamme...@teleport.com lar...@teleport.com Subject: [Repeater-Builder] Celwave/Sinclair, etc. antenna conversion to 2-Meters? To: Repeater-Builder@yahoogroups.com Date: Friday, January 15, 2010, 9:40 PM Several years ago, I found an article on the internet about converting the typical 150-174 MHz folded-dipole VHF antennas to 2-Meters. The article had each folded dipole element electrically lengthened by drilling a hole at the bottom and the top of each aluminum tubing element, and mounting a small bolt and nut - thus lengthening the overall electrical length of the element and lowering the resonant frequency. Possibly the coax harness was also rebuilt. The article I'm thinking of had nice color pictures and was a very well done web page article. I haven't been able to find this article, using Google and using the terms that I thought would be a good match. Does anyone remember this article and know what the url might be? These antennas often pop up surplus for cheap (often free), and they're very stout. I see in the catalogs that some versions are rated at 120 MPH wind velocity, and have a 6-year warranty! I've just been given one, too, and it appears to be almost brand-new. It would be a shame to just send it to the metal recyclers when I know there have been good conversion articles. Thanks and 73, Larry
RE: [Repeater-Builder] FS: *NEW* UHF Motorola Micor repeater on Ham band
Nah - we used GE. 73 - Jim W5ZIT --- On Sat, 1/9/10, Jeff DePolo j...@broadsci.com wrote: From: Jeff DePolo j...@broadsci.com Subject: RE: [Repeater-Builder] FS: *NEW* UHF Motorola Micor repeater on Ham band To: Repeater-Builder@yahoogroups.com Date: Saturday, January 9, 2010, 8:07 AM Maybe there's a whole stash of ham-band Micors sitting in a government warehouse somewhere. Maybe Area 51? --- Jeff WN3A _,___
Re: [Repeater-Builder] Was Repeater Battery Question
We use two 6 Volt Golf Cart batteries in series bought from Sams Wholesale to power a GE Mastr II repeater and GE Mastr II mobile link radio with the amp disconnected. The audio amp has been disabled on both radios. The angle on the solar panels was optimized for the winter months. Our panels deliver a total of 6 amps in bright sumertime sun. 73 - Jim W5ZIT --- On Fri, 1/8/10, rrath rr...@charter.net wrote: From: rrath rr...@charter.net Subject: [Repeater-Builder] Was Repeater Battery Question To: Repeater-Builder@yahoogroups.com Date: Friday, January 8, 2010, 11:02 PM Well, I did not receive any replies to my question. So I will ask this question: For those of you that have solar operated repeater sites, what type of battery are you using? Are you satisfied with them? Thank you. Rod kc7vqr
Re: [Repeater-Builder] Mastr II mods and parts
I leave my IDA controller intact, just put the repeat switch in the inhibit position. All necessary connections can be made to the repeater for an external controller on the two Molex connectors on the upper left side of the rear of the chassis. I use the unused frequency select pins to bring out the rest of the connections needed to the system board. Jumpers from the freq select pins where they extend through the system board connect to the audio and COS pins on the receiver board that extend through the system board. I use the old style sockets from miniature tube sockets to push over the pins extending through the system board. Mic and PTT terminals already exist on the Molex connectors. If the external controller fails, just unplug it from the Molex connectors and move the repeat switch on the IDA controller back into the repeat position for emergency operation. 73 - Jim W5ZIT --- On Tue, 1/5/10, Joe k1ike_m...@snet.net wrote: From: Joe k1ike_m...@snet.net Subject: Re: [Repeater-Builder] Mastr II mods and parts To: Repeater-Builder@yahoogroups.com Date: Tuesday, January 5, 2010, 8:22 AM You can make the IDA controller MASTRII work for you, but you aren't going to find a drop-in controller. Look at: http://www.qsl. net/w4xe/ rpttech/rpttech2 1.htm for some good information about how to do it. I have a UHF MASTRII with an IDA controller here that has been an ongoing project for many years. It keeps getting pushed to the back of the pile, mainly because the Maggiore repeater that the MASTRII is suppose to replace never failed. The IDA controller came in several versions, I have the repeater version in mine. You must leave the IDA controller in place because it supplies the 10 Volts DC that is required to run the MASTRII. I would leave the IDA controller functional, except for cutting the PTT lead to the transmitter. That way you can use the speaker in the IDA controller for a monitor. I plan to leave my IDA functional and have it as a back-up controller that I can switch online. 73, Joe, K1ike Michael Cox wrote: Ralph (and others) So is there a IDA equipped version the controller? If not, what does it mean that I have the IDA equiped version?
Re: [Repeater-Builder] dispatch centers run through the internet
Must be me, but at 7:28m, our leader Kevin said 'this thread is OVER.' Jim - Original Message - From: Nate Duehr To: Repeater-Builder@yahoogroups.com Sent: Tuesday, January 05, 2010 5:04 PM Subject: Re: [Repeater-Builder] dispatch centers run through the internet On 1/4/2010 4:24 PM, Randy Ross wrote: Given the inherit instability of the internet (it was NEVER designed to do what we are doing with it), I would consider any communications system which is reliant upon the internet to be flawed by design and completely untrustworthy. We better shut down the mailing list then, it'll never work. LOL! You need to rephrase that whole sentence. The Internet isn't inherently unstable at all. It's just not built for circuit-switched voice. It CAN be used as transport for voice with the right design, monitoring, and EXPENSE... but if you're going to go through all of the necessary questions and redundant hardware tests to get that level of service, you might as well just pay for a POTS line which comes with highly-redundant hardware driving it, and battery backup thrown in for free. Nate WY0X
Re: [Repeater-Builder] Re: Can we tuning duplexer with this equipment?
Actually I have had excellent luck with just making sure there is no leakage from the signal generator or cable to the duplexer when using a talkie as the receiver for tuning a duplexer. After carefully tuning the pass adjustments, leave them alone when you have minimum loss and best SWR. The talkie receiver usually has enough sensitivity to dig the signal out of the noise for adjusting the notch. Tune for maximum noise while bringing the signal level up each time you make an adjustment to keep it noisy. My service monitor has too much signal leakage from the front panel and case to accurately tune the notch. I use an old analog Motorola signal generator which has a minimum of signal leakage as the signal source. Accuracy is preserved since I tune the generator to the talkie frequency. Just remember that any signal that leaks from the signal source will probably be picked up by the unshielded talkie and will add to the signal through the duplexer, and will yield the wrong settings for the notch. So carefully shielding the signal source and using good double shielded cable from the generator to the duplexer lets you get away with using a talkie with no shielding. I do use a 6 dB pad connected to the duplexer input and output with a 50 Ohm load on the unused port. If you can put a 50 Ohm load on the output of your signal source and not pick it up with the antenna on your talkie while the generator is set to maximum output, you have a good signal source for tuning a duplexer. 73 - Jim W5ZIT --- On Thu, 12/24/09, n...@no6b.com n...@no6b.com wrote: From: n...@no6b.com n...@no6b.com Subject: Re: [Repeater-Builder] Re: Can we tuning duplexer with this equipment? To: Repeater-Builder@yahoogroups.com Date: Thursday, December 24, 2009, 11:15 AM At 12/24/2009 07:42, you wrote: RG214 is good for this and you can still find short pieces on e-bay. It is double shielded silver plated braid. Bill N4XIR. Yes, but if the receiver/transmitte r used isn't well shielded, the double-shielded coax does no good. This is a big problem with using HTs for tuning duplexers, as most are poorly shielded. Bob NO6B
RE: [Repeater-Builder] Re: Can we tuning duplexer with this equipment?
Hey Skip, for those of us who have a service monitor without a Spectrum Analyzer built in, is there an alternative to using a radio with an S-meter on the duplexer end to see the peak and notch? I was wondering if an RF Meter would be sensitive enough to pick up the peak of the regular output of a service monitor? Would this be better in that we are taking another receiver out of the mix or would we be better to figure how to put an analog S Meter on a scanner or some type of stable receiver? Also with an variable output from say a service monitor, what do you use the attenuator pads for and where. Thanks for sharing your knowledge and experience. I only need to turn a few times a year and have an IFR1200A so I have a stable output, I just need to see the peak and notch. 73 JIM KA2AJH From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of skipp025 Sent: Wednesday, December 23, 2009 12:36 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Can we tuning duplexer with this equipment? If you have a decent radio with some type of receive signal strength indicator, some coax cables a separate transmitter radio (an HT would work) and some attenuator pads from Ebay... you could do it. s. Azam 9w2...@... wrote: found this simple and cheap rf measurement kit at http://www.foxdelta.com/products/pm3.htm can it be use to tune a duplexer? rgds azam
RE: [Repeater-Builder] Henry Repeater Amp or TE Systems
We have had a Henry 5-10 in 100 plus out in service on a UHF Community Repeater. Bought it fifteen years ago this last July and have had it serviced twice in fifteen years..NOT BAD IN MY OPINION. And best of all Ted Henry is only a phone call or E-Mail away to help with questions. 73 JIM KA2AJH From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Kevin Berlen, K9HX Sent: Sunday, December 20, 2009 2:19 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Henry Repeater Amp or TE Systems I have no experience with the TE Systems product, but have had good experience with the Henry products. We have had a 25W in, 100W out UHF Henry amp on a busy community repeater for the last 10 years and have had no problems. This is on a high-density site, and it also does not cause any intermod for the other users on site. Kevin, K9HX At 09:44 PM 12/19/2009, you wrote: Okay all, looking for opinions. Our club is going to purchase a 220 amplifier and a 440 amplifier for our repeaters. For 220, we're looking at either the TE Systems 2210RAN or the Henry C100B10R For UHF, it's either the TE Systems 4412RA or the Henry C100D30R. We have a Henry C300C30R in use for about 3-1/2 years now (running it at 250w output) on our 6-meter repeater and had to send it in about 13 months into its life to have the finals replaced. No problems since, though. I was pleased with Henry's response to the problem. Even though it was out of warranty, they fixed it under warranty. Though the TE systems amplifiers have more output (150w vs 100w), I have concerns about their reliability. The local D* repeater has had a lot of problems with their VHF amplifier, and it's not very clean (of course, that could be the fault of the D* repeater transmitter, too!). What are your opinions, TE Systems vs Henry? -- James Adkins, KB0NHX Vice-President -- Nixa Amateur Radio Club, Inc. (KC0LUN) www.nixahams.net Southern Missouri Assistant Frequency Coordinator - Missouri Repeater Council www.missourirepeater.org The Nixa Amateur Radio Club - There is no charge for awesomeness! (Well, only $1.00 per month) No virus found in this incoming message. Checked by AVG - www.avg.com http://www.avg.com/ Version: 9.0.717 / Virus Database: 270.14.114/2575 - Release Date: 12/19/09 03:33:00
RE: [Repeater-Builder] Maxtrac five pin Connector
Thanks Eric, maybe I will suggest to Batlabs that a note would be appropriate before someone used the pins as numbered. 73 JIM KA2AJH From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Eric Lemmon Sent: Sunday, December 20, 2009 3:27 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Maxtrac five pin Connector Jim, The problem here is that the pin numbers shown on the schematic diagram in the MaxTrac manual are not in their physical order. In fact, the pins are numbered 1-2-3-4-5, with Pin 1 closest to the side of the radio. 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 James Sent: Sunday, December 20, 2009 11:57 AM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: [Repeater-Builder] Maxtrac five pin Connector On batlabs http://www.batlabs.com/images/maxacc2.gif http://www.batlabs.com/images/maxacc2.gif it shows the five pin connector with pin one towards edge of radio and numbers going 1,4,2,3,5. On Repeater Builder http://www.repeater-builder.com/maxtrac/maxtrac-option-plug.html http://www.repeater-builder.com/maxtrac/maxtrac-option-plug.html it shows number one pin towards the outside of the radio and the pins going 1,2,3,4,5. Has anyone notices the difference and know why BatLabs has it that way? Thanks in advance. JIM KA2AJH
RE: [Repeater-Builder] Maxtrac five pin Connector
Thanks for the reply Eric. Now I understand the difference. 73 JIM KA2AJH From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Eric Vincent Sent: Sunday, December 20, 2009 4:29 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Maxtrac five pin Connector Hello Jim, The right way to look the connector is from the back of the radio, and the pinout for J3 is 5,4,3,2,and1 (Pin 5 is close from 12 Volts power connector and 1 to the outside of the radio) Top of radio / / 5 4 3 2 1 / / Batlabs give the pinout with schematic diagram and Repeater Builder give the pinout with Masked Logic Board Circuit Board, 2 different pages on the service manual. 73 Eric VE2VXT _ De : Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] De la part de James Envoyé : 20 décembre 2009 11:57 À : Repeater-Builder@yahoogroups.com Objet : [Repeater-Builder] Maxtrac five pin Connector On batlabs http://www.batlabs.com/images/maxacc2.gif it shows the five pin connector with pin one towards edge of radio and numbers going 1,4,2,3,5. On Repeater Builder http://www.repeater-builder.com/maxtrac/maxtrac-option-plug.html it shows number one pin towards the outside of the radio and the pins going 1,2,3,4,5. Has anyone notices the difference and know why BatLabs has it that way? Thanks in advance. JIM KA2AJH __ Information from ESET NOD32 Antivirus, version of virus signature database 4704 (20091220) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __ Information from ESET NOD32 Antivirus, version of virus signature database 4704 (20091220) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com
RE: [Repeater-Builder] Motorola Spectra Power Cord Reversal
If you don't find anything bad in the A-Line like some have suggested, check out the fuse in the control head. As you pull the head I remember one in the top left corner as you look at the component side of the head. They are miniature and can be easily checked. I just can't remember if there is a second. But you should be able to tell. Good Luck. JIM KA2AJH From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Stephen M. Parker, WR9A Sent: Sunday, December 13, 2009 4:24 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Motorola Spectra Power Cord Reversal Okay, so I'm a klutz. I wired up the power connector in reverse with no fuse in the line. Needless to say, the radio won't even power on now. Anyone have any idea just how extensive the damage might be? Possible for a Motorola-neophyte to repair himself? I have only basic component-level troubleshooting skills and no service manual. Any advice appreciated. ___ Stephen, WR9A - Lafayette, Indiana Email: shortwave (AT) verizon -DOT- net ___
RE: [Repeater-Builder] Price Check on aisle five.....
Just a thought, 3/8 may be hard to get connectors for? I would think you could get ½ for the same price and half inch connectors are available and if you look around , available at a good price. I am going thru getting connectors for 5/8 and they are rare and EXPENSIVE. Something to check into. Good Luck 73 JIM KA2AJH From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of hitekgearhead Sent: Tuesday, December 08, 2009 2:38 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Price Check on aisle five. Hey guys, I have the opportunity to purchase some surplus Andrew heliax. The model is EFX2RN-50. It is 3/8 At $0.50/foot, is this a good deal? I don't think connectors are installed. I am thinking of using it for amateur use on the VHF UHF bands at home. What do you think? -Albert
RE: [Repeater-Builder] Astron RM-35M AGM charging abilities?
Hi Eric, I have been trying to follow these posts on battery back power. Under this arrangement you describe, will the supply not get hot with the Schottky Diode in place if the battery is discharged very low? I am researching the best way to hook the battery to my Astron which does not have the back-up charger. Thanks for all of the information. 73 JIM KA2AJH From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike Lyon Sent: Monday, December 07, 2009 12:45 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Astron RM-35M AGM charging abilities? Sorry. Yes, it's a -BB version. -Mike On Mon, Dec 7, 2009 at 9:31 AM, Eric Lemmon wb6...@verizon.net wrote: Mike, I thought that only the RM-35M-BB has a battery backup circuit built-in; I have an RM-35M power supply in service, and it does not have a battery charging circuit. A very simple method of achieving no-break battery backup is to install a Schottky power diode on the positive output terminal of the power supply, and connect both the battery positive terminal and the radio power leads to the cathode lug of the diode. My preferred Schottky diode for this application is an International Rectifier 122NQ030R. The diode is mounted on a 1 wide copper bar that is placed on the power supply's positive output stud. The diode has a 1/4 output terminal, which makes it very easy to add to an existing system. Note that the R in the diode part number means that it is reverse polarity. The output voltage setting of the power supply must be increased about 1/2 volt to compensate for the forward voltage drop of the Schottky diode. The voltage should be set so that the AGM battery has the recommended float voltage at its terminals while the radios are operating and the system has stabilized at least 24 hours. This voltage will usually be around 14.2-14.5 VDC, depending upon the battery specifications. 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 Mike Lyon Sent: Sunday, December 06, 2009 10:02 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: [Repeater-Builder] Astron RM-35M AGM charging abilities? Howdy Folks, I am wondering if anyone has experience with the Astron RM-35M and its built-in charging circuit? Has anyone used it to charge 12VDC AGM batteries? I have 3 motorola Maxtracs (2 RX, 1 TX) that are powered from this power supply and I need to put some backup power on the system. I am wondering, should I buy a separate charger for the AGM batteries (Qty. 2) or is the charging circuit within the the RM-35M sufficient? 73's, Mike Lyon KE6MRE
Re: [Repeater-Builder] Making Mitrek output power adjustable, how?
The highband Mitreks I have used had 2 pots in the driver area. 1 for drive level the other for output power. I have been able to adjust them to just about any power though it is said they may not operate properly below 50%. The pots are small plastic one blue and the other orange if I remember correctly. You need a small screwdriver to adjust them - Original Message - From: cruizzer77 To: Repeater-Builder@yahoogroups.com Sent: Sunday, December 06, 2009 9:59 AM Subject: [Repeater-Builder] Making Mitrek output power adjustable, how? There are tons of Mitrek mods out there but I haven't found the adjustable output power mod. Therefore: Is it easily possible to make the output power adjustable using a pot or trimmer? The desired model is a lowband Mitrek for a 6m repeater conversion. 73 Martin HB9TZW
Re: [Repeater-Builder] $2000 Motrac era repeater!
I have 3 Motorola high band transmitters of anyone is interested. these were paging transmitters on 152.240 and put out 275 watts I believe. Any of these could be teamed up with a vhf receiver to make a repeater. Now they have 70mhz receivers in them with the necessary controls to make them repeat what they hear on the link frequency. They also have hi stability oscillators. I believe they are Micor type units and each has a pair of 4cx250 tubes in them. 7' cabinets at over 300 pounds each. Located in Waco, TX. If anyone wants one let me know. They are doing me no good. WB5OXQ I am good in QRZ. - Original Message - From: JOHN MACKEY To: Repeater-Builder@yahoogroups.com Sent: Wednesday, November 25, 2009 1:44 AM Subject: [Repeater-Builder] $2000 Motrac era repeater! http://portland.craigslist.org/clc/ele/1477806751.html
RE: [Repeater-Builder] Zetron 38A not sending reverse burst
I use several Z-38A controllers in ham applications. I get around the squelch crash problem by setting the Z-38A to stop sending a PL tone as soon as a user unkeys. The short tail is still there from the repeater, but the lack of a tone to a receiver lets the audio shut off while carrier is still present, and does not generate a squelch crash. I believe Nate calls this a 'chicken burst' though I have never heard that term before - A second benefit of shutting off the tone after a user unkeys is that it allows in-band links with no ping-pong effects due to the tails talking to each other. 73 - Jim W5ZIT --- On Wed, 11/18/09, Eric Lemmon wb6...@verizon.net wrote: From: Eric Lemmon wb6...@verizon.net Subject: RE: [Repeater-Builder] Zetron 38A not sending reverse burst To: Repeater-Builder@yahoogroups.com Date: Wednesday, November 18, 2009, 1:09 PM You have discovered one of many dirty little secrets that apply to aftermarket tone panels. When designing the 38A tone panel, and many other products, Zetron overlooked the fact that reverse burst is essential in the repeated audio. From a close examination of the 38A manual and schematics, it appears that it will decode CTCSS reverse burst and CDCSS turnoff code, and MAY generate CDCSS turnoff code, but I see no evidence that it can generate reverse burst. That alone is a major shortcoming! Zetron is not the only manufacturer that ignored reverse burst encoding when designing a community repeater controller. Instrument Associates, which produced the i20R On-site Repeater Controller for the Motorola GR1225 desktop repeater, did likewise. I did not realize this until I found that squelch crashes were immediately heard as soon as I put the i20R in service. Although some fans of the old Highway Patrol shows starring Broderick Crawford may enjoy the sound of a squelch crash, I do not, nor do any of my radio users. That i20R was pulled from service immediately, and put on the shelf! There are two different formats for CTCSS reverse burst STE (Squelch Tail Elimination) that are defined in TIA-603-C, the international standard for land-mobile radio performance and design. One format, used principally by Motorola, uses a 120-degree phase shift, while the other format, used by Kenwood and many others, uses a 180-degree phase shift. Since modern radios often use digital signal processing to encode and decode low-speed data (CTCSS and CDCSS), it is all too easy to design a circuit that responds perfectly to 180-degree phase shift but ignores 120-degree phase shift, and vice-versa. Zetron and others couldn't be bothered to create a CTCSS encoder that could be switched between the two reverse-burst formats, so they just ignored the problem. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@ yahoogroups. com [mailto:Repeater-Builder@ yahoogroups. com] On Behalf Of wspx472 Sent: Wednesday, November 18, 2009 10:15 AM To: Repeater-Builder@ yahoogroups. com Subject: [Repeater-Builder] Zetron 38A not sending reverse burst I am trying to get a repeater going using a 38A and find that it doesn't send reverse burst. I thought I saw that it did in the manual but upon looking again, all I see is where it responds to reverse burst. Does anyone know for sure if it is supposed to send reverse burst? If so, how do I get it to do it?
[Repeater-Builder] OT ACSSB - how does it work and is it possible for the hobbyist to scratch build
This problem (generating the 90 degree phase shift audio) is all that is keeping me from an experiment to generate a SSB signal using a little known technique I ran across in an old QST. It seems that a phase modulated FM signal can be combined with amplitude modulation with the audio 90 degree phase shifted and generate a SSB signal. The experiments referenced wound up with a SSB signal with full carrier. My first foray into sideband operation back in the late '50s was with a command transmitter with the grids modified to push pull and applying push pull audio to the screens. This generated a double sideband suppressed carrier signal. I suspect that I could modify a GE Prog transmitter by rewiring the grids of a 60 Watt final to push pull and applying push pull audio to the screens and applying 90 degree phase shifted audio to the normal phase modulation input would generate a SSB suppressed carrier signal. I suspect the pre-emphasis in the phase modulation circuit would have to be defeated, or does a phase modulation scheme automatically generate the pre-emphasis? 73 - Jim W5ZIT --- On Wed, 11/11/09, DCFluX dcf...@gmail.com wrote: From: DCFluX dcf...@gmail.com Subject: Re: [Repeater-Builder] acssb - how does it work and is it possible for the hobbyist to scratch build To: Repeater-Builder@yahoogroups.com Date: Wednesday, November 11, 2009, 9:02 PM I was playing with the ideas of making adapters, but it is supprisingly difficult to throw audio exactly 90 degrees out of phase over a broad frequency range.
Re: [Repeater-Builder] Re: repeater problems solved
This may have been addressed earlier, and if so I apologize. A GE Mobile Mastr II will generate an oscillation in the audio output stage if it is not loaded at all times. I don't remember the beginning of this thread, but if you are using a GE Mobile radio, this will wind up transmitting a tone on the repeated signal. I go one step further than putting a load on the speaker leads (10 Ohms) - I place a small teflon sleeve over the pin to the mother board that supplies B+ to the audio output stage after desense tests are completed. This removes B+ from the audio amp, and the sleeve can be removed if the audio output needs to be activated for later tests. 73 - Jim W5ZIT --- On Tue, 11/10/09, W3ML w...@arrl.net wrote: From: W3ML w...@arrl.net Subject: [Repeater-Builder] Re: repeater problems solved To: Repeater-Builder@yahoogroups.com Date: Tuesday, November 10, 2009, 4:19 PM Thanks, I will check that. It is funny that out of the guys that hear it most are using mobile rigs. But, then the other night they said hey it is gone. Then ten minutes later it is back. All I know is with the fixes I was given by a great bunch of hams on here and the GE site and the with the new antenna and coax the repeater works like it is suppose to and sounds great to me. Of course, I am losing my hearing so I don't hear the tone. Thanks and 73 John --- In Repeater-Builder@ yahoogroups. com, wd8chl wd8...@... wrote: W3ML wrote: If it is not the grounded negative terminal I will just put in high pass filter on the PL cable. That should help reduce it or remove it. Thanks all. 73 John I wouldn't do that. FIRST-unplug the encoder audio out lead and see if it's still there (maybe the voltage in lead too, then ground). Then check levels. It should be between 500 and 800 Hz deviation. Then look for a good clean sine wave. Com-Spec SS-32's and TS-32's are known to have a less than perfect sine wave and can sound a bit raspy sometimes. If all that is OK, the problem is on the receiving end.
Re: [Repeater-Builder] Re: Linking Repeaters Remotely
The old Alinco DR-590 generated a reverse burst. I could always tell when a station was using one as the squelch noise went away immediately on a PL controlled repeater. 73 - Jim W5ZIT --- On Tue, 11/10/09, JOHN MACKEY jmac...@usa.net wrote: From: JOHN MACKEY jmac...@usa.net Subject: Re: [Repeater-Builder] Re: Linking Repeaters Remotely To: Repeater-Builder@yahoogroups.com Date: Tuesday, November 10, 2009, 5:15 PM It's been since the late 1950's that reverse burst has been around for PL tones. So for over 50 years the ham manufacturers haven't gotten on board yet. -- Original Message -- Sure wish ham manufacturers would get on the ball on this feature and get it in the ham rigs. It's only been a decade or so now... all of our repeaters do it... the rigs don't know how to decode it, and I refuse to mess with chicken burst. I just use real radios, and it all sounds great!
Re: [Repeater-Builder] Wacom WP-639 coax lengths
Don't forget that the length of the coupling loops inside the cans contributes to the overall length of the coax. Ideally you would have a quarter wave from the Tee coupling the two sides of the duplexer together back to each can, including coupling loops. The idea is to have the pass side look into an open circuit (the quarter wave line going to the other side of the duplexer) at the Tee. 73 - Jim W5ZIT --- On Tue, 11/10/09, Kris Kirby k...@catonic.us wrote: From: Kris Kirby k...@catonic.us Subject: [Repeater-Builder] Wacom WP-639 coax lengths To: Repeater-Builder@yahoogroups.com Date: Tuesday, November 10, 2009, 6:26 PM I'm working on re-fitting a Wacom WP-639 for re-use. There are two remaining jumpers on this four cavity filter set, located between the cavities on each respective side; there is no coax between the High side of the Low side, only coax between each of the two low side cans and the two high side cans. Due to the age of the jumpers, and with parts available on hand, I am replacing the jumpers with RG-142. My questions are these: Are the side pieces frequency specific or middle of the road. (i.e.: 146.01 and 146.61 MHz for each side or 146.31MHz for both)? How much length does a connector add to the length of the cable when making a frequency-specific or critical jumper? Is the distance between the high-side and the low-side of the duplexer 1/2 wavelength? I believe that from the tee in the middle of the set, there should be 1/4 wavelength to the first high-side can, and 1/4 wavelength to the first low-side can. Is this correct? I know that I have to factor for velocity factor, but I am at a loss as to what to add or subtract for crimp N-type or PL-259 connectors. Thoughts, comments, information are greatly appreciated. -- Kris Kirby, KE4AHR Disinformation Analyst
Re: [Repeater-Builder] Re: Linking Repeaters Remotely
I used an in-band link to couple two VHF repeaters together, and have a Zetron Z38A controller that allows me to terminate the repeaters transmitted tone as soon as a user drops the input. That is all it took to keep the two repeaters happy. I never did have much luck with two users talking at the same time, so that has not been a problem. With the link we have, a user would have to be right on top of the repeater to overcome the link, so still just hear one user with a hetrodyne if another user is trying to talk, the same as if they were both trying to talk on the same repeater and one was stronger than the other. 73 - Jim W5ZIT --- On Tue, 11/10/09, larynl2 lar...@hotmail.com wrote: From: larynl2 lar...@hotmail.com Subject: [Repeater-Builder] Re: Linking Repeaters Remotely To: Repeater-Builder@yahoogroups.com Date: Tuesday, November 10, 2009, 7:38 PM In-band RF linking on the user input frequencies is a kludge at best. It can double with users, and has other timing problems... Nate Duehr, WY0X n...@... Nate, just a comment on the above. We've used in-band on-channel (IBOC??) linking to a nearby repeater for weather nets for many moons now. It has worked absolutely great for us. Sure, it's not elegant; a dedicated link is probably the better way. And, users are going to double anyway. Can't get away from that. We've not found any timing problems you refer to... Laryn K8TVZ
Re: [Repeater-Builder] Wanted - Single Channel Motorola Micor
Do you need a complete radio or just a control head and speaker for under the dash? Do you care if the radio works? wb5oxq - Original Message - From: littlejimmy74 To: Repeater-Builder@yahoogroups.com Sent: Wednesday, November 04, 2009 7:51 AM Subject: [Repeater-Builder] Wanted - Single Channel Motorola Micor Hi, I am new to the group so apologies if this is not what it was intended for. I have just bought a replica Starsky and Hutch Ford Gran Torino and I am looking for a single channel Motorola Micor just like the ones used in the TV show (apparently). It will most likely just be for show, so as long as it looks good it doesn't really matter if it works or not. I have added a file today called Wanted - Single Channel Motorola Micor with pictures of what I'm after as I couldn't find out how to attach pictures to this message. Hope you guys can help Thanks James
RE: [Repeater-Builder] Pager Interference to 2-meter VHF Public Service Band
Mike, I think the next step would be to try to get the paging operator to install an isolator on the output of his VHF pager for a temporary check. If he has one already, he could try putting two in tandem to increase the rejection of any RF coming back down the feedline from his antenna. What you may be hearing is a mix in his VHF transmitter with something else in his vicinity with an unstable frequency that is sweeping the mix through the VHF band. Years ago we had a problem in the Dallas area with a welder that produced an unstable carrier that would sweep through the 2 meter input frequencies of the repeaters in the area. The welder was located on the upper floors of the building in progress, and had a nice site for radiating the interfering signal. A foxhunt tracked that one down but it did not go away till the building was completed. Good luck with your QRM. 73 - Jim W5ZIT --- On Wed, 10/28/09, Mike Besemer (WM4B) mwbese...@cox.net wrote: From: Mike Besemer (WM4B) mwbese...@cox.net Subject: RE: [Repeater-Builder] Pager Interference to 2-meter VHF Public Service Band To: Repeater-Builder@yahoogroups.com Date: Wednesday, October 28, 2009, 7:03 PM Strangely enough, I happen to be an O-O (as is the another club member, who sponsors the 145.110 repeater… which is also being interfered with) and have been in touch with our coordinator. He’s been very helpful in urging us along and providing us guidance (or reassurance) that we’re going about this the right way. He’s also indicated that he’s willing to go to ARRL HQ with it if we need to and then let them go lateral to the FCC. We had a great experience with Laura Smith about a year ago when we needed help convincing a banned user to stay off our systems. It took one letter to her (complete with recordings) and one phone call to get our banned user a nice letter from Laura reminding him that he really couldn’t afford to pay what she was prepared to charge him for using our repeater! So… I think that, armed with enough ammunition, we can go that route. However, I REALLY don’t want to. The fellow who owns the paging company has tried to work with us, and although it’s not going as fast as we’d like, I understand that he’s got a different motivation than we do. Aside from that, he helped us out with a professional climbing crew a couple of years ago, got us a good deal on a DB-224, and cut us a break on some hardline and connectors. The bottom line is, it’s not a relationship we want to end through a Federal intervention! That being said, I HAVE reminded him that he’s admitted that we’re carrying his data on our repeater, and whether or not it’s his equipment at fault or somebody else’s, HE’S going to be the first person they come looking for and it’ll be a terrible pain in his butt… and wallet. He acknowledges that fact. So… while I’d like for him to do some things differently… I get where he’s coming from and I appreciate that he’s helped as much as he has. On the other hand, if it turns out to be equipment that belongs to another company… I’ll drop a dime in a heartbeat if I don’t get satisfaction from them! 73, Mike WM4B From: Repeater-Builder@ yahoogroups. com [mailto:Repeater- buil...@yahoogro ups.com] On Behalf Of Paul Plack Sent: Wednesday, October 28, 2009 7:48 PM To: Repeater-Builder@ yahoogroups. com Subject: Re: [Repeater-Builder] Pager Interference to 2-meter VHF Public Service Band Mike, the interference is clearly not caused by your own rusty roof, and is both eggregious and easily documented. I know we hate to go there unless it's a last resort, but I'll bet the FCC is almost as tired of non-compliant pager systems as we are. Perhaps that technique would prove motivating. - Original Message - From: Mike Besemer (WM4B) To: Repeater-Builder@ yahoogroups. com Sent: Wednesday, October 28, 2009 5:34 PM Subject: RE: [Repeater-Builder] Pager Interference to 2-meter VHF Public Service Band I’m with ya on your third paragraph. We’ve worked well together so far, but we have very different techniques and motivations. .. .
Re: [Repeater-Builder] GE Lookout Repeater related info needed.
GE lookout repeaters will built with PE modules. If you can find a PE Highband manual, that should help you. Jim K7OET From: lsasmazel lsasma...@comcast.net To: Repeater-Builder@yahoogroups.com Sent: Wed, October 14, 2009 8:41:55 PM Subject: [Repeater-Builder] GE Lookout Repeater related info needed. I just bought an old VHF GE Lookout Repeater from eBay. Any info related to convert 2 meter appreciated. If you have service manual with crystal calculator it will be more then enough. Thanks and 73 Levent – WW2L
Re: [Repeater-Builder] Repeaters vs RC
I operated an RC Aircraft on 53.5 for quite a few years, and the receiver in the model was wide open. The transmitter used on/off keyed pulses, with the carrier on the air most of the time and short interruptions (200 milliseconds) of the carrier being the control method. A reverse pulse position modulation scheme. I can tell you that operating the model within 50 miles of a channel 2 TV station would paralyze the receiver in the model as soon as it was airborne above a few hundred feet. I usually had time to recover the control when the model descended under the big signal from the TV transmitter, but it was a real pain to try to use it that way. The receiver IF was at 455 kHz and was only 5 kHz or so wide, but the transmitter used no bandwidth reduction and was probably at least 100 kHz wide. The low power and ground level antenna of the transmitter probably prevented interfering with other operations on six meters, but the potential was there. If the complainant is trying to control a model, there are lots of options now that do not include a six meter frequency, with the new 2.5 gig systems very cheap. No more frequency interference between models, since they can all operate at the same time with the spread spectrum control system. 73 - Jim W5ZIT --- On Sat, 10/10/09, MCH m...@nb.net wrote: From: MCH m...@nb.net Subject: [Repeater-Builder] Repeaters vs RC To: Repeater-builder@yahoogroups.com Date: Saturday, October 10, 2009, 11:58 PM Does anyone have any experience with repeater operation vs RC operation (Remote Control)? I have an RC operator who is 'raising a stink' about a repeater that is 30 kHz away from one of his RC channels. BTW, he also wants to 'compromise' by offering to relocate the repeater off the 52-54 MHz segment so they will not impact his RC operations. Some compromise, huh? I think he has the impression that RC channels are 100 kHz wide (they are standard AM) because the 6M RC channels are spaced at 100 kHz (53.100, 53.200, 53.3500, 53.400, Etc). I've told him they cannot be more than 10 kHz wide, if that, and that the FC repeater would be only 16 kHz wide, and at 30 kHz away the two can coexist without interference. Oh, the repeater in question is at least 20 miles away from his flying site. Any input out there? Exactly how wide is his AM signal? Thanks, Joe M.
RE: [Repeater-Builder] Antenna question
John, It sounds like you already have a G7? How old is it and how does it operate? I am trying to figure out how it stood up to your WX Elements. My two cents .In WNY on the highest hill in Allegany County I had and still have a G7. I had it up for about seven years at 160 until I got a used stationmaster and used the Repeater-Builder Article to bring it down in frequency to 147 MHz At that point we pulled the G7 put up the Stationmaster and also increased the cable from ½ to 7/8. The G7 was cleaned up and put back on the tower at about 60 for packet. The antenna was side mounted and we used a PVC T and piece of PVC Pipe to stabilize the top from whipping around. I would never top mount one. Also there are two weak points in my opinion, one being the radials. If I ever put up a new G7 I will replace the Radials with solid aluminum, as the hollow stock radials are fragile. The coaxial connector is also fragile. We had a tower crew, put a G7 on a commercial tower and they broke the connector right out of the base installing he pigtail. We sent the next one up with the pig tail installed and weatherproofed on the ground which I recommend. We have another one in G7 in Pa. on top of a radar tower and that has been in service for 12 plus years. My experience has been good as I have been where you are that you have to do with what you can afford. 73 JIM KA2AJH From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of W3ML Sent: Sunday, October 11, 2009 10:09 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Antenna question Hi again, We are looking to replace that used antenna after getting 100 feet of new Andrews 1/2 donated to our club. Now I realize that the DB type antenna is the best, but we do not have 800 bucks to buy one. So, my question is should we just get a new G7-144 to replace the used G7 or is there another type of vertical that we could get that would be good. Being in North Indiana, our winters can be quite brutal, so we would probably want something durable. Any suggestions. 73 John, W3ML
RE: [Repeater-Builder] ARRL Approves Study Committee to Research Develop Plan for Narrowband Channel Spacing
We must look far beyond the repeater that we narrow band. What about the linked systems? We would no longer be able to use the favorite Maxtrac or Radius for Link Radios as there is no narrow band kits available. Thousands of these units will be taken out of commercial use, and I was looking forward to getting this equipment for ham use. Then there is the popular Spectra that many of us are using for Mobile and Base Radios in the ham band. They are Superior to the ham grade radios in selectivity, audio, etc, but again they will not narrow band. Let's not loose site that this decision will cost us big bucks above and beyond the price of Narrow Banding the repeater to keep our systems going. Comments please..Jim KA2AJH From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Kevin King Sent: Friday, October 02, 2009 9:58 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] ARRL Approves Study Committee to Research Develop Plan for Narrowband Channel Spacing I agree we do not need to make more pairs everywhere. But let's face it. We build from the left over's from the commercial world. Ok some of you buy all new latest, etc. At some point most of the gear is going to be narrow. Do any of the older operators remember moving to narrow band before? Let's set the politics aside and see what this change can add? Obviously we have a transition period. Can we have a dual input machine with wide and narrow IF's? Maybe a wide PL and narrow PL? Does narrow banding offer us anything in improvements? Will it help us in noisy RF sites? Can we teach or make kits for users to modify their rigs? Not looking for a flame war, just stimulating some positive discussion. :) -Kevin -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 Chuck Kelsey Sent: Friday, October 02, 2009 9:32 AM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: Re: [Repeater-Builder] ARRL Approves Study Committee to Research Develop Plan for Narrowband Channel Spacing I agree, that's the political side of the problem. I don't see that there is a true NEED for more pairs in amateur service. There IS a need in the commercial/public safety world. Chuck WB2EDV - Original Message - From: Cort Buffington c...@lawrence-ks.org mailto:cort%40lawrence-ks.org To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Friday, October 02, 2009 9:23 AM Subject: Re: [Repeater-Builder] ARRL Approves Study Committee to Research Develop Plan for Narrowband Channel Spacing To wrap this around to repeaters Where I live, which is admittedly not, say, California... there isn't a real spectrum problem on any of the FM repeater bands (if I may use such a term). There is a slight problem in some areas with the so-called paper repeaters, but that's not a reason to narrow-band. It might be a reason to actually give coordination to those who really will keep a repeater up and operational, but not to narrow-band. Is there a reason to do this other than creating more channels? And how many places desperately need the channels -- as in, even if the repeater pairs are all full, are the repeaters being used? Just a thought... 73 DE N0MJS Yahoo! Groups Links
Re: [Repeater-Builder] Passive fer wifi
I have a buddy who has a son living about a quarter mile away, and he mounted a router in a weatherproof fiberglass box on top of his 50 ft tower, and his son gets a good signal. Getting the router antennas up in the clear was the answer for that system. 73 - Jim W5ZIT --- On Tue, 9/8/09, numberone5call n...@bellsouth.net wrote: From: numberone5call n...@bellsouth.net Subject: [Repeater-Builder] Passive fer wifi To: Repeater-Builder@yahoogroups.com Date: Tuesday, September 8, 2009, 6:07 PM Curious; Has anyone tried a passive repeater to extend the distance of internet service. I have a daughter living in a house about 150 yards away. She has little to no service from my n-router. There is nothing to block the signal between us. What about connecting two yagis back to back and putting them on a pole halfway between us. Never tried it on vhf or uhf. Just wondering if anyone has tried it fer a wifi extension. Dennis no5c
Re: [Repeater-Builder] RC110 repeater controller
Good luck on getting any support at all on the RC110. It appears that Ken has abandoned the folks who bought one of those and you might as well chunk it in the trash. That is my take on it anyway. 73 - Jim W5ZIT --- On Tue, 9/8/09, wb7bts wb7...@yahoo.com wrote: From: wb7bts wb7...@yahoo.com Subject: [Repeater-Builder] RC110 repeater controller To: Repeater-Builder@yahoogroups.com Date: Tuesday, September 8, 2009, 9:27 AM Anybody heard from Ken AH6LE? I've sent him 2 e-mails in the last 2 weeks (ar...@arcomcontroll ers.com and ah...@arcom. com) and no reply so far.I need to send our controller in for firmware upgrade and voice chip programming. Thanks Phil
RE: [Repeater-Builder] COR board for simple repeater??
Hey guys did this site change? I looked it up and it was there, checked it again all I see is ads. 73 JIM From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of D. Daniel McGlothin, KB3MUN Sent: Thursday, September 03, 2009 7:19 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] COR board for simple repeater?? Perhaps I'm misunderstanding what you are looking for. The bottom two images at http://www.hs9dmc.com/repeater/vox/handy-to-handy_kitchen-house.htm seem to show the two HTs linked by the dual circuit shown on the page using the speaker and mic jacks. A different circuit shown on http://www.hs9dmc.com/repeater/repeater_handy2way.htm appears to be wired directly to the HT circuit boards. 73 de Daniel KB3MUN gervais wrote: Well Daniel it helped me a lot i can see the little interface between the 2 portable radios it is what i need,but he is not using the 2 connectors on the radio, the mic and speaker thanks gervais ve2ckn -- From: D. Daniel McGlothin, KB3MUN kb3...@mcglothin.us mailto:kb3mun%40mcglothin.us Sent: Thursday, September 03, 2009 7:19 AM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: Re: [Repeater-Builder] COR board for simple repeater?? Azman may have been referring to this link for HT to HT: http://www.hs9dmc.com/repeater/vox/handy-to-handy_kitchen-house.htm The schematic and pictures transcend the language barrier. The second grouping from the bottom seems to be the collection of repeating interfaces. Hovering the mouse over the links will show the link name in the status bar. From that, you can determine the content of the other links in the group.
RE: [Repeater-Builder] COR board for simple repeater??
I cut and pasted both and sent to two friends I was talking with and all three of us got an advertisement page several times. Now I got it back again. Thanks for the offer, we were just talking about the circuit. 73 JIM From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of D. Daniel McGlothin, KB3MUN Sent: Saturday, September 05, 2009 10:22 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] COR board for simple repeater?? [Shrug] It just worked for me. ;) I archived copies of the simple interface pages...can I answer any questions for you? 73 de Daniel KB3MUN Jim Cicirello wrote: Hey guys did this site change? I looked it up and it was there, checked it again all I see is ads. 73 JIM *From:* Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] *On Behalf Of *D. Daniel McGlothin, KB3MUN *Sent:* Thursday, September 03, 2009 7:19 PM *To:* Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com *Subject:* Re: [Repeater-Builder] COR board for simple repeater?? Perhaps I'm misunderstanding what you are looking for. The bottom two images at http://www.hs9dmc.com/repeater/vox/handy-to-handy_kitchen-house.htm seem to show the two HTs linked by the dual circuit shown on the page using the speaker and mic jacks. A different circuit shown on http://www.hs9dmc.com/repeater/repeater_handy2way.htm appears to be wired directly to the HT circuit boards. 73 de Daniel KB3MUN
Re: [Repeater-Builder] Antenna SWR = Desense?
One of the local repeater operators used an antenna at the top of a 100 ft tower that got bent over during last winter storms. He put up a temporary antenna at the tower base and is experiencing some really bad desense with the low antenna. He is using a GE Mastr II base station repeater and had reasonable operation with little desense on the antenna 100 ft above the equipment. The antenna only 15 ft or so above the equipment now and has the bad desense problem. It would appear that the antenna is flooding the equipment with more RF than the shielding can handle. BTW, take a look at some of the previous posts on modifying a DB-224 by adding a 2 inch extension to each end of each dipole to bring it down into the ham band. The SWR does not go completely to 1:1, but does hit a minimum in the middle of the 2 meter ham band. No change to the harness was required to move the antenna frequency. 73 - Jim W5ZIT --- On Tue, 9/1/09, tahrens301 tahr...@swtexas.net wrote: From: tahrens301 tahr...@swtexas.net Subject: [Repeater-Builder] Antenna SWR = Desense? To: Repeater-Builder@yahoogroups.com Date: Tuesday, September 1, 2009, 2:03 PM Hi folks, Just a bit of an update... got the 6 cavity Telewave duplexer tweaked up - looks like it pretty much hit the specs in the data sheet. With a dummy load at the 'antenna' port, I used an iso-tee to inject a signal at both the receiver input, and between the antenna port the dummy load. With a weak signal, both places showed me that there was no desense. Very weak signal would hold in the repeater. However, putting the system on the antenna (a 150-160 mhz DB-224 100' horizontally 10' vertically separated) through a metal building fed with 7/8 heliax, there seems to be no end to the desense! The wattmeter shows 30 watts forward 3 watts reflected at the antenna port, if my math serves, it's less than 2:1. Can the less than 1:1 match be the culprit? Thanks, Tim W5FN __
Re: [Repeater-Builder] adjacent repeaters linked
Skipp, I have two VHF repeaters linked in-band. 146.92 with a remote base radio on the other repeater frequency at 145.45. I use GE Mastr II radios in both repeaters, and used a modified GE Mastr II mobile radio for the link. I removed the final amp from the link radio and use the 250 mW exciter through a low pass filter/antenna relay to a three element beam. The beam is about 15 feet below the DB-224 repeater antenna and causes no de-sense to the repeater. I am sure the repeater de-senses the link radio, but the result is not audible. The two repeaters are about 10 miles apart and are line-of-sight. The 145.45 repeater uses a directional antenna to cover a major highway in a canyon that is masked from the 146.92 repeater in several places. 73 - Jim W5ZIT --- On Mon, 8/31/09, skipp025 skipp...@yahoo.com wrote: From: skipp025 skipp...@yahoo.com Subject: [Repeater-Builder] adjacent repeaters linked To: Repeater-Builder@yahoogroups.com Date: Monday, August 31, 2009, 3:17 PM I pulled off linking two adjacent 224MHz Repeaters. The repeaters are on different 30 mile distant mountain top sites. One repeater has an on-band linking radio (Alinco DR-235) set up on the adjacent frequency. As an example... 224.960 and 224.940MHz. With enough physical isolation, filtering and setup... much to my surprise it works pretty well. The owner wants to now park IRLP on it and waste everyone's time. But they are his repeaters... On toward part 2. s.
RE: [Repeater-Builder] UHF Connectors for 1/2 Andrew Superflex
Tony, I just took a piece of ½ Superflex that previously had a connector on it and tried to place a PL259 UHF MALE on it. The corrugation on the superflex is larger than the ID of the connector. The connector will go over the center dielectric but the copper corrugation on the superflex is slightly larger than the outside of the UHF Male. The only way I can see it may be possible to join the connector to the cable would be to have a sleeve extend over the superflex and the outside of the UHF connector and then solder the sleeve. This might not be as good of an idea as getting proper connectors that fit the superflex like the N Male and use an adapter to get to UHF. Good Luck JIM KA2AJH From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Tony KT9AC Sent: Monday, August 31, 2009 12:51 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] UHF Connectors for 1/2 Andrew Superflex Hello Everyone, I need to make some short jumpers UHF-male to UHF-male and have a length of 1/2 Andrew Superflex on order (actually eBay). Can I use regular silver-teflon PL259's with this cable, similar to how 1/4 superflex is used with the reducer? I can't find UHF Male connectors for 1/2 superflex at Tessco. Thanks, Tony
RE: [Repeater-Builder] Tram 1481 Dual Band UHF/VHF Antenna
Tom, Thanks for the information. This gives us an idea of what to expect when we tear it down. We might find a combination of these things that is giving us the problem. 73 JIM KA2AJH From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Tom W2MN Sent: Monday, August 31, 2009 4:32 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Tram 1481 Dual Band UHF/VHF Antenna JIM KA2AJH, I use the TRAM 1480 (also Workman version) in several installations and they all work well. I have not had any problems or failures. The 1481 has additional collinear sections on top (making it about 6 ft taller). The TRAM and WORKMAN antennas are ELECTRICALLY similar to DIAMOND and COMET (I've had some completely apart). There are some mechanical differences which might make the D and C brands a little more durable in severe weather areas. I don't think they are worth the extra price. Now, they all are DC ground but not in the way we all think when compared to a J Pole. The antenna element is internally grounded through the coil in the base but capacitively coupled to the coax center conductor. So, if you look for a DC connection between center conductor and ground, you will think it is open circuit (but is not). Now, all of these very tall antennas tend to be very whippy. With the very low launch angle (particularly on 440) any strong wind will cause the signal strength to vary considerably with the wind. You might consider taking it completely apart (easy job) and examining for water (moisture) and any evidence of bad solder, broken connections or burn marks from lightning discharge. I have rebuilt a DIAMOND X500 that failed after many years. The problem was that the fiberglass wore thin and allowed moist air to condense onto the internal foam rattle insulators. They all seem to use common pieces of soft packing foam that acts like a small sponge. Replacing these and repainting the fiberglass (white or light gray PLASTIC spray paint) fixed the problem. The point is, all 4 brands are at risk of the same long term problem. Tom
Re: [Repeater-Builder] Tram 1481 Dual Band UHF/VHF Antenna
I have the big Tram dual band antenna and it works real well, however, i the one you have is used you may need to disassemple it and disconnect the junctions on the elements and clean the copper with scotchbrite or emery colth until shiny and reassemble the antenna. This tarnishes with age and this will renue the performance. I have no swr trouble on either band and the antenna performs pretty well for a cheap antenna. - Original Message - From: n...@no6b.com To: Repeater-Builder@yahoogroups.com Sent: Monday, August 31, 2009 12:06 PM Subject: Re: [Repeater-Builder] Tram 1481 Dual Band UHF/VHF Antenna At 8/31/2009 06:33, you wrote: Hi Guys, We spent most of yesterday working on a UHF Mastr II Exec. Repeater, we are using a TRAM 1481 Dual Band Antenna on. This is the high gain 8.3 dB VHF/11.7 UHF. The system uses UHF Repeater, VHF Simplex, and IRLP. The antenna works very poorly on UHF and much better on VHF. The SWR is about 3-1 on both frequencies. The antenna is not DC Ground and there is no shorted connectors. Lack of help prevented us from taking the antenna down and apart at this time. We ran tests by putting the antenna on a portable and working a fixed base and again the VHF pinned the meter and the UHF was weak, only a couple of S units better than the portable rubber duck. Has anyone had a similar problem. I understand that the antenna is a compromise and not as good as a single band folded dipole for example, but several of us have these and they work great except for this one. I am thinking there are enough Tram 1481 out there and someone may have had the same problem. I can't speak for the 1481 since I never had one, but I never had any matching or duplexing problems with the 1480 (lower gain 8' version). I also have a few Comet GP9s in service they work fine, with advertised gain on both bands - no compromise. Also there has been many posts about the LMR400 used in repeater service. It is my understanding that the foil type should NEVER be used between duplexers, from the TX, RX to the Duplexers, but I am not sure about between the duplexer and the antenna. Comments please! You definitely don't want LMR400 any place where duplexed signals are present. This means between the duplexer antenna. Not sure why it would be a problem for the TX RX connections to the duplexer unless the connectors weren't installed properly, but then again why take the chance on a short jumper where loss isn't an issue? Silver-plated RG-214, RG-393, RG-223, RG-400, or RG-142 is known to be safe for that application. Bob NO6B
RE: [Repeater-Builder] Nearby Repeaters
I can tell you that the same tones on different frequencies inside the same site can cause a problem. My 2-meter repeater was on 151.4, the same tone as the local high band fire and channel on the VHF community repeater. When a combination of the units with 151.4 came up, I had inter-mod on my 2-meter machine. Also at times there was noise on the fire that we could tell disappeared when the 2-meter dropped along with the community repeater. Luckily I own the tower so I was able to move my 2-meter repeater to 123.0 and it happened that my private channel on the community repeater was also 151.4 which I also changed. Now I try to make sure that every PL inside my site is different. Since there is NO two PL's the same, the problem went away. Our Motorola Tech told me this is common at tower sites using the same PL on different frequencies. 73 JIM From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of WA3GIN Sent: Sunday, August 30, 2009 9:07 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Nearby Repeaters Looking for opinions. Our club has a couple of 2m repeaters; we chose to run them with PL and we picked 107.2 because that tone freq. was not in use in the area. Recently two other clubs who also have 2m repeaters have decided to utilze the same PL tone freq. Does having numerous repeaters PL'd with the same tone freq. increase the probability of the normally generated intermod/mixed signal to now carry within the produced signal a correct PL tone that may land on the input freq. of another local repeater? Is it considered a bad practice to utilize the same PL for numerous repeaters in the same band all located within a few miles of each other? Thanks, dave wa3gin
Re: [Repeater-Builder] Nearby Repeaters
Here in central Texas we typically use 123.0 for all repeaters for uniformity,. It makes it easier for folks to remember. there are quite a few on 2 meters and they never cause any problems with each other. WB5OXQ. - Original Message - From: WA3GIN To: Repeater-Builder@yahoogroups.com Sent: Sunday, August 30, 2009 8:06 AM Subject: [Repeater-Builder] Nearby Repeaters Looking for opinions. Our club has a couple of 2m repeaters; we chose to run them with PL and we picked 107.2 because that tone freq. was not in use in the area. Recently two other clubs who also have 2m repeaters have decided to utilze the same PL tone freq. Does having numerous repeaters PL'd with the same tone freq. increase the probability of the normally generated intermod/mixed signal to now carry within the produced signal a correct PL tone that may land on the input freq. of another local repeater? Is it considered a bad practice to utilize the same PL for numerous repeaters in the same band all located within a few miles of each other? Thanks, dave wa3gin
RE: [Repeater-Builder] Nearby Repeaters
Can't explain it Joe. All I can tell you is that our 7.21 2-Meter Repeater had users in weak signal areas completely wiped out when the community repeater and the fire transmitter came up when they were on 2-meters. As I said we changed the PL's and that is ALL I did and now the same stations talk away and there is NO noise on 2 meters. Also the service tech says it cleared up noise on the fire 154.295 and I can tell you that the community repeater is OK now, the noise that came in on 151.4 does NOT come in on any other CTCSS. Break thru in RF physics, probably just dumb luck, which I am not use to. JIM -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of MCH Sent: Sunday, August 30, 2009 12:02 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Nearby Repeaters Again, explain how the mixing products or intermod changed. If that's true, maybe you're really on to something. If I can eliminate intermod by changing the PL tone or the CWID, that would be an incredible breakthrough in RF physics. Joe M. Jim Cicirello wrote: I can tell you that the same tones on different frequencies inside the same site can cause a problem. My 2-meter repeater was on 151.4, the same tone as the local high band fire and channel on the VHF community repeater. When a combination of the units with 151.4 came up, I had inter-mod on my 2-meter machine. Also at times there was noise on the fire that we could tell disappeared when the 2-meter dropped along with the community repeater. Luckily I own the tower so I was able to move my 2-meter repeater to 123.0 and it happened that my private channel on the community repeater was also 151.4 which I also changed. Now I try to make sure that every PL inside my site is different. Since there is NO two PL's the same, the problem went away. Our Motorola Tech told me this is common at tower sites using the same PL on different frequencies. 73 JIM *From:* Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] *On Behalf Of *WA3GIN *Sent:* Sunday, August 30, 2009 9:07 AM *To:* Repeater-Builder@yahoogroups.com *Subject:* [Repeater-Builder] Nearby Repeaters Looking for opinions. Our club has a couple of 2m repeaters; we chose to run them with PL and we picked 107.2 because that tone freq. was not in use in the area. Recently two other clubs who also have 2m repeaters have decided to utilze the same PL tone freq. Does having numerous repeaters PL'd with the same tone freq. increase the probability of the normally generated intermod/mixed signal to now carry within the produced signal a correct PL tone that may land on the input freq. of another local repeater? Is it considered a bad practice to utilize the same PL for numerous repeaters in the same band all located within a few miles of each other? Thanks, dave wa3gin Yahoo! Groups Links
Re: [Repeater-Builder] DB-224 Matching
I have modified several of the 155 mHz center frequency DB-224 antennas to the ham band. I found that it takes a 2 inch extension to each end of each dipole to move them down. My mod was done empirically by taking a single dipole and hooking it to an analyzer and finding the original center frequency to be ~ 155 mHz. With the 2 inch extension added to each end, the center frequency moved down to 146 mHz. I did not have to modify the harness. I make the extension out of a scrapped TV antenna with rolled tubing elements. I flatten the tubing so that it can be wrapped around the dipole at the center point of each end and put a single screw through the wrapped flat portion of the TV tubing to clamp it to the dipole. When all assembled, I measure the distance to the end of the tubing from the 224 dipole and cut the extension to 2 inches. This moves the center frequency of the completed DB-224 mod down to 146 mHz from 155 mHz. 73 - Jim W5ZIT --- On Wed, 8/19/09, tahrens301 tahr...@swtexas.net wrote: From: tahrens301 tahr...@swtexas.net Subject: [Repeater-Builder] DB-224 Matching To: Repeater-Builder@yahoogroups.com Date: Wednesday, August 19, 2009, 8:40 AM In my quest to get rid of desense with the Quantar, someone mentioned that having the 'wrong' antenna could make the desense worse. I've got a DB-224 - not the 'ham' version, but the 150-160 MHz version, and there is a bit of a mismatch. Has anyone ever had any desense that they could attribute to less than perfect matching? (I'm not talking about a gross problem, like one of the elements broken, etc) Has anyone built a 'tuner' for that version of the 224, so that the transmitter/ duplexer pair would see a better SWR? If this thing ever gets up, it's gonna be perfect! :-) Thanks, Tim W5FN
Re: [Repeater-Builder] Re: DB-224 Matching
The oxidation problem was what I was trying to avoid with my wrap and clamp scheme. I just use galvanized hardware to clamp the extension since it is an aluminum to aluminum connection (no dissimilar metal) to the 224 element. Oxidation of the screw and nut are not in the contact path so it does not matter. Also, the clamp connection is at the highest impedance point on the dipoles, so again, it is not a high current point, so the clamp scheme does not carry much current through the clamp. Not drilling holes in the existing antenna was also a goal, as I have modified several antennas on site with a tower climber doing the install. Keeps it simple! 73 - Jim W5ZIT --- On Thu, 8/20/09, tahrens301 tahr...@swtexas.net wrote: From: tahrens301 tahr...@swtexas.net Subject: [Repeater-Builder] Re: DB-224 Matching To: Repeater-Builder@yahoogroups.com Date: Thursday, August 20, 2009, 10:16 AM Hi Jim, That's what I was looking for! Do you have any oxidation/connectio n issues where the tubing is wrapped around screwed together? Perhaps drilling a hole through the original element for connection might be better. Just wondering. Thanks for the tip!! Tim W5FN --- In Repeater-Builder@ yahoogroups. com, Jim Brown w5...@... wrote: I have modified several of the 155 mHz center frequency DB-224 antennas to the ham band. I found that it takes a 2 inch extension to each end of each dipole to move them down. My mod was done empirically by taking a single dipole and hooking it to an analyzer and finding the original center frequency to be ~ 155 mHz. With the 2 inch extension added to each end, the center frequency moved down to 146 mHz. I did not have to modify the harness. I make the extension out of a scrapped TV antenna with rolled tubing elements. I flatten the tubing so that it can be wrapped around the dipole at the center point of each end and put a single screw through the wrapped flat portion of the TV tubing to clamp it to the dipole. When all assembled, I measure the distance to the end of the tubing from the 224 dipole and cut the extension to 2 inches. This moves the center frequency of the completed DB-224 mod down to 146 mHz from 155 mHz. 73 - Jim W5ZIT
Re: [Repeater-Builder] Repeaters and Water Towers
We put a repeater in the equipment room right under the water tank about 150 ft above the ground back in the 70's. It is a great environment since the water in the tank is a great heat sink. It assumes the average temp of the outside air (integrates the temp over months at a time) and keeps the air temp in the equipment room very cool in the summer and warm in the winter. The repeater is still operating on this tank. The only problem we had was when the city decided to sand blast the tank and did not let us know. The dust was over an inch thick on every horizontal part of the repeater, and was inside our shield boxes (tiny holes, but the crap sifted through). They bought us some new circuit board assemblies for the transmitter and receiver and we installed them in the old shielded boxes. We did manage to clean up the duplexer without having to tune it again. Be sure to keep up with any maintenance on the tank to make sure this does not happen to you - 73 - Jim W5ZIT --- On Thu, 8/20/09, kc8fwd kc8...@hotmail.com wrote: From: kc8fwd kc8...@hotmail.com Subject: [Repeater-Builder] Repeaters and Water Towers To: Repeater-Builder@yahoogroups.com Date: Thursday, August 20, 2009, 4:03 PM Hello, Has anyone had experience with repeaters at water tower sites now that homeland security is involved? I would like to hear your experience. Thanks Mike KC8FWD
Re: [Repeater-Builder] Re: An advocate for a little audio compression
Our engineering prototype parts guy had a sign behind his desk that said: Failure to plan ahead on your part does not constitute an emergency on my part 73 - Jim W5ZIT --- On Sun, 8/16/09, Paul Plack pl...@xmission.com wrote: From: Paul Plack pl...@xmission.com Subject: Re: [Repeater-Builder] Re: An advocate for a little audio compression To: Repeater-Builder@yahoogroups.com Date: Sunday, August 16, 2009, 9:19 AM No, John, I was never been a CE, but a PD several times. This same guy was the first to have on his door a sign I've since seen several other places: Procrastination on Your Part Does Not Constitute An Emergency on My Part 73, Paul, AE4KR __
Re: [Repeater-Builder] Re: Com Spec TS-64 DS
Skip, here is a link to my most recent experience with the TS-64: http://sbarcnm.org/forum/index.php?action=dlattach;topic=108.0;attach=154 This was the version sold for the GE Mastr II. I had to OR two receivers for the transmit CTCSS (repeater receiver and link receiver). I used the filtered audio supplied by the TS-64 to supply the audio input to the controller so I would not have problems with the input/output CTCSS beat frequency problem. I routed audio and control signals out the unused frequency select pins directly adjacent to the TS-64 board for access on the rear of the unused GE Mastr II Molex connectors with no alteration or soldering to the Mastr II repeater. The repeater has been in service for a year now with this configuration and the CTCSS decode and control works all OK. I found the TS-64 ideally configured to work in the repeater environment, and did not have to add any wires to the standard GE harness to complete the repeater install with a link radio. 73 - Jim W5ZIT --- On Fri, 8/14/09, skipp025 skipp...@yahoo.com wrote: From: skipp025 skipp...@yahoo.com Subject: [Repeater-Builder] Re: Com Spec TS-64 DS To: Repeater-Builder@yahoogroups.com Date: Friday, August 14, 2009, 11:06 AM Any of you worked with a Com Spec TS-64 or TS-64 DS lately? I have two topics to mention in this post. The first is the dip switch daughter board under the TS-64 making the same unit the TS-64 DS. Anyone have any additional information regarding the daughter board? Anyone used the Daughter Board for applications other than the dip switch? The second bit of fun (topic) is related to the Voice Audio CTCSS Filter being tied to the Discriminator Input. The old TS-32 boards has a separate input for the Voice Audio Filter and the Discriminator Input. Seems kind of a shoot yourself in the foot limitation when you permanently connect the two different inputs together. Anyone run into the above issues and what did you do about it? cheers, skipp
Re: [Repeater-Builder] Re: An advocate for a little audio compression
One way might be to set the transmitter deviation to 5 kHz for a 2.5 kHz deviation input signal. Set the VOX threshold to trip at about 3 kHz input deviation and use it to switch in a 6 dBV pad to cut the deviation back down. A fast attack VOX with a slow release would keep the audio from pumping up and down. 73 - Jim W5ZIT --- On Wed, 8/12/09, skipp025 skipp...@yahoo.com wrote: From: skipp025 skipp...@yahoo.com Subject: [Repeater-Builder] Re: An advocate for a little audio compression To: Repeater-Builder@yahoogroups.com Date: Wednesday, August 12, 2009, 10:54 AM n...@... wrote: Yes, but increasing the user's deviation to the proper level would help a lot more. A lot of people have voices, which are not considered Radio or Broadcast Quality in both pitch and volume. Add a little mic shyness and you're often stuck with lower average deviation. Trying to inform and fix users about close talking the mic at higher volume levels does a good job of scaring some folks off. A simple VOX ANDed with the COS would take care of that. Bob NO6B I would be interested in a description of the above... cheers, s. At 8/11/2009 08:28, you wrote: Hi Paul, One has to deal with reality... while you might consider a soft talking person not properly trained, more than a fair number of users don't have a booming voice. In a larger number of cases a little bit of added audio compression/ limiting helps resolve the low (higher/soft pitch) perceived volume level difference. The brain is pretty good about picking a voice from background audio so just being able to hear the receive audio better is going to help.
Re: [Repeater-Builder] Re: 2M Vertical Dipoles
There is a definite dielectric effect for slipping an antenna inside a PVC pipe. Here are a couple of antennas that I build to insert inside PVC and both have to be final tuned while inserted inside the support pipe. http://sbarcnm.org/forum/index.php?topic=83.0 http://sbarcnm.org/forum/index.php?topic=58.0 I built one version of the first one listed to slip inside a fiberglass radome from a defunct commercial antenna using RG-213 and one half inch copper tubing for the sleeves. I had to use a shorted matching stub to get a decent SWR from this setup. 73 - Jim W5ZIT --- On Wed, 8/12/09, AJ aj.grant...@gmail.com wrote: From: AJ aj.grant...@gmail.com Subject: Re: [Repeater-Builder] Re: 2M Vertical Dipoles To: Repeater-Builder@yahoogroups.com Date: Wednesday, August 12, 2009, 10:05 AM Does really PVC absorb or RF or just act as a dielectric? The reason I ask is I'm looking at encasing an antenna project for the sake of weatherproofing and PVC would fit the bill rather easily. 73, AJ, K6LOR On Mon, Aug 10, 2009 at 9:49 AM, AA8K73 GMail aa8...@gmail. com wrote: AJ, if you replace the steel mast with a fiberglass one, won't you still have the metallic feed line there? Doesn't PVC absorb RF? 73, Mike AJ wrote: On this same topic of the mast-less Antennex/Laird dipole arrays, has anyone attempted to top mount these from a fiberglass mast to minimize interaction with the normal steel pole? I have quite a few surplus fiberglass poles left that would likely work, even for side mounting on 1/2 wave spacing from the tower... On that same note, does anyone have construction plans for a dipole array (not necessarily folded dipoles)? I remember seeing a set of plans somewhere quite a while ago - we're thinking of constructing one but encasing the dipoles in fiberglass or PVC to try to protect from the weather and debris at our site (top of a large farm field)... 73, AJ, K6LOR
Re: [Repeater-Builder] Re: 2M Vertical Dipoles
I see that YAHOO added spaces to the links in my last post. Remove the spaces to make the links work. 73 - Jim W5ZIT --- On Wed, 8/12/09, Jim Brown w5...@yahoo.com wrote: From: Jim Brown w5...@yahoo.com Subject: Re: [Repeater-Builder] Re: 2M Vertical Dipoles To: Repeater-Builder@yahoogroups.com Date: Wednesday, August 12, 2009, 10:43 AM There is a definite dielectric effect for slipping an antenna inside a PVC pipe. Here are a couple of antennas that I build to insert inside PVC and both have to be final tuned while inserted inside the support pipe. http://sbarcnm. org/forum/index.php?topic=83.0 http://sbarcnm. org/forum/index.php?topic=58.0 I built one version of the first one listed to slip inside a fiberglass radome from a defunct commercial antenna using RG-213 and one half inch copper tubing for the sleeves. I had to use a shorted matching stub to get a decent SWR from this setup. 73 - Jim W5ZIT ,___
Re: [Repeater-Builder] 2M Vertical Dipoles
I posted a note on this a while back, but will recap here. I mounted four dipoles from a DB-224 on one leg of two sections of Rhon 25 and mounted the tower on an antenna range turntable. The pattern was a perfect circle, using DB Power readings around the 360 degrees. I thought I remembered the offset being 3 dB, but I must have been mistaken since it was pointed out that could not be the gain off the back of the antenna mounted this way. All four dipoles were stacked vertically on one leg of the tower and oriented directly away from the tower. The gain was measured as 9 dBd in the favored direction, coming down to 6 dBd at 90/270 degrees, and I thought I remembered the gain as 3 dBd off the back side of the tower, but it must have been a lower number. In any case, looking at the plot it appeared to be a perfect circle with an offset center. The center offset must not have been 3 dB. I was surprised that the tower did not cause a null off the backside, just caused a reduction in gain in that direction. This plot was submitted to the FCC to get repeater license WR5ADU and WR5ADV back in the '70s when antenna patterns for a repeater had to be submitted. 73 - Jim W5ZIT --- On Sun, 8/9/09, MCH m...@nb.net wrote: From: MCH m...@nb.net Subject: Re: [Repeater-Builder] 2M Vertical Dipoles To: Repeater-Builder@yahoogroups.com Date: Sunday, August 9, 2009, 6:33 PM Lots of comments on the unidirectional pattern which I suggested might not work well. Any comments on having the elements on one side of the tower right on the leg? Joe M. n...@no6b.com wrote: At 8/9/2009 05:47, you wrote: As frequency decreases, so does the importance of keeping the dipoles exactly above one another. This is why you can get away with mounting the bays of a LB array around a smaller tower (like Rohn 25) and still have very good omni-directional performance. Positioning the bays around a central supporting mast of a UHF array creates considerable pattern distortion and gain is lost. I once modeled this arrangement in NEC-Win: the resulting pattern looked like a warped pancake. On-horizon gain was all over the place. Bob NO6B - - -- Yahoo! Groups Links
RE: [Repeater-Builder] 2M Vertical Dipoles
Chuck, Would that be with the dipoles all pointed in the same direction, of set up so they face different directions for Omni reception. I picked up an almost new DB224 but no mast so I am following this thread with interest. 73 JIM KA2AJH From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey Sent: Sunday, August 09, 2009 7:43 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] 2M Vertical Dipoles That will work well to favor one area. Chuck WB2EDV - Original Message - From: MCH m...@nb.net mailto:mch%40nb.net To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Sunday, August 09, 2009 7:40 PM Subject: Re: [Repeater-Builder] 2M Vertical Dipoles DOH! Let me rephrase that... Lots of comments on the omnidirectional pattern which I suggested might not work well. Any comments on having the elements on one side of the tower right on the leg? Joe M. MCH wrote: Lots of comments on the unidirectional pattern which I suggested might not work well. Any comments on having the elements on one side of the tower right on the leg? Joe M. n...@no6b.com mailto:no6b%40no6b.com wrote: At 8/9/2009 05:47, you wrote: As frequency decreases, so does the importance of keeping the dipoles exactly above one another. This is why you can get away with mounting the bays of a LB array around a smaller tower (like Rohn 25) and still have very good omni-directional performance. Positioning the bays around a central supporting mast of a UHF array creates considerable pattern distortion and gain is lost. I once modeled this arrangement in NEC-Win: the resulting pattern looked like a warped pancake. On-horizon gain was all over the place. Bob NO6B Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links
[Repeater-Builder] FS: FC900 With 6 Band Units
FC900 Loaded with Band Units ACC FC900 Remote Base Interface complete with band units for 28 MHz 50 MHz 144 MHz 220 MHz 440 MHz 1200 MHz $1000.00 US Funds, plus shipping Pictures at http://home.att.net/~kvo/fc900.html Jim WB8AZP k...@att.net
[Repeater-Builder] FS: RC850 Version 3.42 DVR Manuals
RC850 with version 3.42 DVR with Version 2.0 Power Cables Manuals Pictures at:http://home.att.net/~kvo/rc850.html $350.00 PLUS Shipping Jim WB8AZP k...@att.net
Re: [Repeater-Builder] Need schematics for Duracomm LP series power supplies
I use several and when 1 fails I send it to Duracom and they rebuild or replace it for half the cost of a new one. I am not sure they will share a schematic WB5OXQ - Original Message - From: NORM KNAPP To: Repeater-Builder@yahoogroups.com Sent: Sunday, August 02, 2009 6:11 PM Subject: Re: [Repeater-Builder] Need schematics for Duracomm LP series power supplies On the rare occasion that one dies, usually due to lightening, we just replace the unit. However, if you do manage to obtain a schematic, please do post it. 73 N5NPO - Original Message - From: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com Sent: Sun Aug 02 15:26:54 2009 Subject: [Repeater-Builder] Need schematics for Duracomm LP series power supplies Anyone have any leads on the above? I can try calling Duracomm tomorrow, but from what I've read they aren't very helpful in this area. Thanks. Bob NO6B
Re: [Repeater-Builder] Too stupid to run Google??
A method of taking the COR I have used on a radio that I did not have the internal schematic is to locate the wires going to the BUSY LED on the front panel and insert the diode of an Opto Isolator in series with the busy LED and take the COR from the transistor of the Opto Isolator. You can get either a positive going COR by connecting the collector to a positive supply and taking the signal from the emitter, or a negative going COR by connecting the emitter to ground and putting a pull up resistor to the collector with the signal taken from the collector. 73 - Jim W5ZIT --- On Tue, 7/28/09, Scott Zimmerman n3...@repeater-builder.com wrote: From: Scott Zimmerman n3...@repeater-builder.com Subject: [Repeater-Builder] Too stupid to run Google?? To: Repeater-Builder@yahoogroups.com Date: Tuesday, July 28, 2009, 3:38 PM I *know* this is out there somewhere, but apparently I am WAYYY to stupid to run google right now. I have a TM-331 I am making in to a single frequency remote base. Where can I find a COR in this radio? I see TONS of references to using an RBI-1, but I am only using ONE channel. Apparently I have been out in the sun too long or something. Maybe Google is having trouble reading my mind... Yea, That's it!! Scott Scott Zimmerman Amateur Radio Call N3XCC 474 Barnett Road Boswell, PA 15531
Re: [Repeater-Builder] Re: Closed Repeaters
Or maybe one of the big wideband AM signals, 25 kcs. Jim K7OET From: Adam techiea...@yahoo.com To: Repeater-Builder@yahoogroups.com Sent: Tuesday, July 28, 2009 4:48:38 AM Subject: [Repeater-Builder] Re: Closed Repeaters From: Repeater-Builder@ yahoogroups. com [mailto:Repeater-Builder@ yahoogroups. com] On Behalf Of Alan Rabin Sent: Sunday, July 26, 2009 1:57 PM To: Repeater-Builder Subject: Re: [Repeater-Builder] Re: Closed Repeaters Please excuse Me. I feel compelled to make this one comment. Consider for a moment the fact that when one employs a repeater, they are effectively sitting on two Amateur frequencies within a given geographic area. If I were to claim two Amateur frequencies let's say for instance on the HF band, and tell others they cannot use them what would most of us say? I for one would say you were working split. 73! -Adam WJ4X
[Repeater-Builder] Re: FS: Icom IC-T81A Handheld Collection
--- In Repeater-Builder@yahoogroups.com, Jim Kvochick k...@... wrote: Although not directly related to repeaters, a great chance to buy a nice set of handhelds that work on 50, 144,440,and 1.2 GHz! Seven Icom IC-T81A Handhelds As Described Below: It appears this is already spoken for. Jim WB8AZP
[Repeater-Builder] Re: FS: Icom 1.2 GHz repeater, Controller, and Duplexer
--- In Repeater-Builder@yahoogroups.com, Jim Kvochick k...@... wrote: I lost my repeater site, as a direct result of the business downturn in Michigan. For Sale: Icom IC-RP1210 1.2 GHz Analog repeater, with ACC RC85 Controller, Version 5.2 Software, ACC Audio Delay, and ACC Rack Mount Case. TX-RX Systems 28-97-0101 Duplexer DownEast Microwave 25 Watt Amplifier $1100.00 Free Shipping CONUS It appears this item is sold as well. Jim WB8AZP
[Repeater-Builder] FS: More ACC Repeater Controllers for Sale
RC850 Version 3.42 Brown Case Serial 634 Power Cable ACC DVR Version 2.0 3 Channels Power Cable Manuals $400.00 Free Shipping CONUS === RC850 Version 3.8 With Computer Interface Board Brown Case Serial Number 845 DVR Version 2.0 3 Channels DVR Does Not Seem To Work Power Cables Manuals $400.00 Free Shipping CONUS === RC85 Version 5.2 With ACC Rackmount Case SCOM Audio Delay Module added No Manuals $175.00 Free Shipping CONUS === Inquire off list, please Jim WB8AZP k...@att.net
[Repeater-Builder] FS: Icom 1.2 GHz repeater, Controller, and Duplexer
I lost my repeater site, as a direct result of the business downturn in Michigan. For Sale: Icom IC-RP1210 1.2 GHz Analog repeater, with ACC RC85 Controller, Version 5.2 Software, ACC Audio Delay, and ACC Rack Mount Case. TX-RX Systems 28-97-0101 Duplexer DownEast Microwave 25 Watt Amplifier $1100.00 Free Shipping CONUS Inquire off list please 73 Jim WB8AZP k...@att.net
[Repeater-Builder] FS: ACC FC900 Fully Loaded!
FC900 With the following ICOM Modules Attached: UX129-A (1.2GHz) UX49-A (440 MHz) UX39-A (220 MHz) UX29-A (144 MHz) UX59-A (50 MHz) UX19-E (28 MHz) $1000.00 Free Shipping CONUS Please inquire off list 73 Jim WB8AZP k...@att.net
[Repeater-Builder] FS: Icom IC-T81A Handheld Collection
Although not directly related to repeaters, a great chance to buy a nice set of handhelds that work on 50, 144,440,and 1.2 GHz! Seven Icom IC-T81A Handhelds As Described Below: T81A Serial 001005, Antenna,Belt Clip, Handstrap, BP-200 Battery, BP-197 Dry Cell Pack, BC110 Wall Charger Manual +++ T81A Serial 005574, Antenna,Belt Clip, Handstrap, BP-200 Battery, BP-197 Dry Cell Pack, BC110 Wall Charger No Manual +++ T81A Serial 002439, Antenna,No Belt Clip, No Handstrap, BP-200 Battery, BP-197 Dry Cell Pack, BC110 Wall Charger Manual T81A Serial 001005, Antenna,Belt Clip, Handstrap, BP-200 Battery, MAHA BP200, 12 Volt DC Cord, No Manual, No AC Charger T81A Serial 002812, Antenna,Belt Clip, No Handstrap, BP-200 Battery, BP-197 Dry Cell Pack, BC110 Wall Charger Manual + T81A Serial 005517, Antenna,Belt Clip, Handstrap, BP-200 Battery, BP-197 Dry Cell Pack, BC110 Wall Charger Manual Internal Speaker Could Stand to be Replaced. + T81A Serial 003464, Antenna,Belt Clip, No Handstrap, BP-200 Battery, BP-197 Dry Cell Pack, BC110 Wall Charger Manual + 1 WW Associates Master Charger Drop In Charger + RT Systems T81 Programming Software RS232 Cable + COMPLETE PACKAGE $850.00 Free Shipping CONUS
[Repeater-Builder] FS: Several ACC FC900 Interfaces
1 FC900 Interface with PL Encode chip, no other cables. $180.00 free ship CONUS 1 FC900 Interface with PL Encode chip, no other cables. $180.00 free ship CONUS 1 FC900 Interface with UX29H (144 MHz), UX39A (220 MHz), and UX49A (440 MHz) all cabled up. $600.00 free ship CONUS Inquire off list please. 73 Jim WB8AZP k...@att.net
[Repeater-Builder] Re: FS: Several ACC FC900 Interfaces
--- In Repeater-Builder@yahoogroups.com, Jim Kvochick k...@... wrote: 1 FC900 Interface with PL Encode chip, no other cables. $180.00 free ship CONUS 1 FC900 Interface with PL Encode chip, no other cables. $180.00 free ship CONUS 1 FC900 Interface with UX29H (144 MHz), UX39A (220 MHz), and UX49A (440 MHz) all cabled up. $600.00 free ship CONUS Inquire off list please. 73 Jim WB8AZP k...@... The FC900 with radios is tentatively spoken for. The other two FC900 units remain available.
