Re: [Repeater-Builder] Need supplier for UHF welded yagi
Hi Gran, Have a look at Comprod Communications. We have used their antennas and duplexers and are very pleased with the quality. http://www.comprodcom.com/en/antennas/base/pdf/433-70.pdf Roger VA7RS - Original Message - From: Gran Clark To: Repeater-Builder@yahoogroups.com Sent: Sunday, March 29, 2009 8:50 PM Subject: Re: [Repeater-Builder] Need supplier for UHF welded yagi Chuck I will call Sinclair. They don't list a welded antenna. On the beam I have the elements are mounted on the outside of the boom which I would think would be hard to make a good weld if I went that way. Gran At 07:34 PM 3/29/2009, you wrote: Forgot to add that Sinclair makes one for the amateur portion of the band. You can order direct - they have a ham discount. Chuck WB2EDV - Original Message - From: Chuck Kelsey To: Repeater-Builder@yahoogroups.com Sent: Sunday, March 29, 2009 9:24 PM Subject: Re: [Repeater-Builder] Need supplier for UHF welded yagi I'll second that. Chuck WB2EDV - Original Message - From: John J. Riddell To: Repeater-Builder@yahoogroups.com Sent: Sunday, March 29, 2009 9:12 PM Subject: Re: [Repeater-Builder] Need supplier for UHF welded yagi Gran, you might want to consider a Sinclair yagi...they are built like a battleship ! ...not cheap...but they work well. 73 John VE3AMZ -- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.238 / Virus Database: 270.11.31/2029 - Release Date: 03/29/09 16:56:00
[Repeater-Builder] Wacom WP-640-6 Duplexer help needed
Would anyone on the list have any info for the Wacom WP-640-6 Duplexer. I realize that Telewave makes the TPRD-1556 and shows it as an equivalent However the cavity construction, cables and cavity port connections are not the the same. Anyone know how these are constructed inside. The duplexer doesn't appear to have been damaged or dismantled but we are unable to pass any frequency through them. Pointers welcome. Larry - N7FM
[Repeater-Builder] Re: Wacom WP-640-6 Duplexer help needed
Try testing each cavity by itself, then test each Tee and each cable individually to see if you can isolate a bad cavity or component. When testing each cavity try moving the tuning rod in and out to see if you have a dead spot from arcing or carbon build-up. If that model has the capacitive tubes on the side of the cavity remove and clean all those components as well. If you can't locate any faulty components on the exterior then internal inspection will be necessary. and it may be simpler to send it back to Wacom/Telewave for repair. Also, I hope your using a service monitor with tracking generator or a signal generator and spectrum analyzer or some type of equipment that you can see the the freqency trace on as you feed it thru the cavities. I have 2 similar 4 cavity sets here and the top and bottom plates appear to be press fitted to the round body. I've beaten the tops off of several DB-40xx cavities and reworked them then put them back together but they are both press and riveted together and I would think easier to disassemble and replace then the Wacom cavities. Of course if the cavities are notching the signal you are trying to pass thru them that might make you think they are bad too. LOL in finding the problem. DougN3DAB --- In Repeater-Builder@yahoogroups.com, Larry la...@... wrote: Would anyone on the list have any info for the Wacom WP-640-6 Duplexer. I realize that Telewave makes the TPRD-1556 and shows it as an equivalent However the cavity construction, cables and cavity port connections are not the the same. Anyone know how these are constructed inside. The duplexer doesn't appear to have been damaged or dismantled but we are unable to pass any frequency through them. Pointers welcome. Larry - N7FM
[Repeater-Builder] Re: master 2 Pa board
--- In Repeater-Builder@yahoogroups.com, gervais ve2...@... wrote: Hi well i has been many years since reproducing the Shuttle audio from my Master 2 repeater but i think my PA is dead now,,, no more output,i just transmit by the exiter ))) i am looking for just the boards of the pa,i dont need the heat sink,less heavy in mail cost. if you have one ,mine was an 110 or 120 watts i dont recall let me know ok, the rest of my PA may serve me as parts if you have one or know where there is one just send an email thanks for your help gervais ve2ckn I forgot to metion,it is a VHF Thanks gervais ve2ckn
Re: [Repeater-Builder] Re: Need supplier for UHF welded yagi
A Sinclair UHF yagi with broken elements? I saw one that got run over by a large truck - got a little bent up, but that's all. Chuck WB2EDV - Original Message - From: ve7fet yahoogro...@woldanski.com To: Repeater-Builder@yahoogroups.com Sent: Monday, March 30, 2009 12:57 AM Subject: [Repeater-Builder] Re: Need supplier for UHF welded yagi Sinclair antennas get elements snapped off all the time (inherent design flaws, even on their HD antennas). The Comprod antennas keep on going.
Re: [Repeater-Builder] Re: Need supplier for UHF welded yagi
I believe Comprod is a break-off group of former Sinclair people. Most of their products look exactly like Sinclair products. Chuck WB2EDV - Original Message - From: Gran Clark To: Repeater-Builder@yahoogroups.com Sent: Monday, March 30, 2009 9:58 AM Subject: Re: [Repeater-Builder] Re: Need supplier for UHF welded yagi Lee Thanks for your input! I did call them and it looks like a good shot. Their amateur price was in the ball park. It sounds like a small company in New York. Gran At 09:57 PM 3/29/2009, you wrote: Sinclair makes decent antennas, but if you really want something to survive in a harsh environment, check out Comprod Communications. http://www.comprodcom.com/en/antennas/base/pdf/480-70.pdf They make antennas that survive nearly anything. Out here on the West Coast we routinely get lots of hard rime ice on coastal mountaintop sites, combined with 100mph+ sustained winds. Sinclair antennas get elements snapped off all the time (inherent design flaws, even on their HD antennas). The Comprod antennas keep on going. Regardless, stay away from Bluewave... they may look like a good antenna (and physically they are strong), but some of their models have water ingress problems which lead to antenna failure. Lee --- In Repeater-Builder@yahoogroups.com, Gran Clark k6...@... wrote: Chuck I will call Sinclair. They don't list a welded antenna. On the beam I have the elements are mounted on the outside of the boom which I would think would be hard to make a good weld if I went that way. Gran
Re: [Repeater-Builder] Need supplier for UHF welded yagi
Gran K6RIF was asking about sturdy antenna's and my suggestion was to check on the Sinclair models. As I recall the SRL307 has a bandwidth of + or - 2.5% so it would be important to know what freq. your antenna's were cut for (ie Center frequency.) 73 John VE3AMZ - Original Message - From: Gary Schafer To: Repeater-Builder@yahoogroups.com Sent: Monday, March 30, 2009 11:12 AM Subject: RE: [Repeater-Builder] Need supplier for UHF welded yagi Not sure who is looking for the yagi antenna but I have three NOS Sinclair SRL307 antennas still in the box. All elements are welded. 73 Gary K4FMX -- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey Sent: Monday, March 30, 2009 7:59 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Need supplier for UHF welded yagi Look here: http://www.sinclairtechnologies.com/catalog/product.aspx?id=89 Chuck WB2EDV - Original Message - From: Gran Clark To: Repeater-Builder@yahoogroups.com Sent: Sunday, March 29, 2009 11:50 PM Subject: Re: [Repeater-Builder] Need supplier for UHF welded yagi Chuck I will call Sinclair. They don't list a welded antenna. On the beam I have the elements are mounted on the outside of the boom which I would think would be hard to make a good weld if I went that way. Gran At 07:34 PM 3/29/2009, you wrote: Forgot to add that Sinclair makes one for the amateur portion of the band. You can order direct - they have a ham discount. Chuck WB2EDV - Original Message - From: Chuck Kelsey To: Repeater-Builder@yahoogroups.com Sent: Sunday, March 29, 2009 9:24 PM Subject: Re: [Repeater-Builder] Need supplier for UHF welded yagi I'll second that. Chuck WB2EDV - Original Message - From: John J. Riddell To: Repeater-Builder@yahoogroups.com Sent: Sunday, March 29, 2009 9:12 PM Subject: Re: [Repeater-Builder] Need supplier for UHF welded yagi Gran, you might want to consider a Sinclair yagi...they are built like a battleship ! ...not cheap...but they work well. 73 John VE3AMZ
Re: [Repeater-Builder] Need supplier for UHF welded yagi
It should have 20 MHz bandwidth, but, yes, the exact cut will be important. They have one for 430-450 MHz. The one I have here says SRL307*5 and lists 430-450 MHz on the sticker. The replacement model number shows the same thing in their catalog. Chuck WB2EDV - Original Message - From: John J. Riddell To: Repeater-Builder@yahoogroups.com Sent: Monday, March 30, 2009 11:42 AM Subject: Re: [Repeater-Builder] Need supplier for UHF welded yagi Gran K6RIF was asking about sturdy antenna's and my suggestion was to check on the Sinclair models. As I recall the SRL307 has a bandwidth of + or - 2.5% so it would be important to know what freq. your antenna's were cut for (ie Center frequency.) 73 John VE3AMZ - Original Message - From: Gary Schafer To: Repeater-Builder@yahoogroups.com Sent: Monday, March 30, 2009 11:12 AM Subject: RE: [Repeater-Builder] Need supplier for UHF welded yagi Not sure who is looking for the yagi antenna but I have three NOS Sinclair SRL307 antennas still in the box. All elements are welded.
[Repeater-Builder] Motorola Tone-Remote system troubleshooting question
All, I am trying to help a local group with a remote TX/RX site they have which is remoted to their office with a leased phone line and some Motorola tone remote equipment. I know the radio end has a Motorola L3276A adapter, and the office end has a telephone style handset (don't have the model number). As of last week, this system will no longer transmit. It still receives fine, but will not activate the PTT on the remote radio, or at least there is no transmitted signal. The fact that is receives tells me that at least the line is intact. I have not yet been to the remote site (several miles away) to look at the radio, but I want to know a little more about this tone remote system before I go: 1) Can I plug a regular telephone into the pair to monitor the signaling? 2) How is the signaling done for TX and RX on the 2 wires? 1950Hz tone or something similar? 3) What should I hear on the line when the PTT on the handset is pressed? 4) Is there a way to passively monitor the leased line audio for the signaling from either end with my HP 8920A service monitor? I don't fully understand the concept of balanced lines, and I don't want to damage any of the equipment by connecting something I shouldn't to it. Any help would be appreciated! Dave Cameron - VE7LTD IRLP System Designer
Re: [Repeater-Builder] Motorola Tone-Remote system troubleshooting question
Hi Dave, The systems we've worked on in aviation follow a standard EIA tone format which is probably similar to yours. On depressing the PTT bar on the handset, the encoder transmits a guard tone burst of 2175 Hz at a high level followed by one of several possible?function tone bursts known as F1, F2, and so on. They're at?100 Hz increments (2050 Hz, 1950 Hz, 1850 Hz, etc.). Then a 2175 Hz tone is sent as long as the PTT bar is depressed, but 20 dB lower than then function tone (the levels vary a bit among systems as dial-up tends to be lower than leased-lines). At the receiving end you should hear the 2175 and function tone bursts followed by the quieter 2175 -- it's quite noticeable assuming you're listening ahead of?the filter provided in the Tone Remote Adapter. Perhaps the encoder or the decoder has drifted off frequency. 73, Bob, WA9FBO -Original Message- From: ve7ltd dcame...@irlp.net To: Repeater-Builder@yahoogroups.com Sent: Mon, 30 Mar 2009 11:22 am Subject: [Repeater-Builder] Motorola Tone-Remote system troubleshooting question All, I am trying to help a local group with a remote TX/RX site they have which is remoted to their office with a leased phone line and some Motorola tone remote equipment. I know the radio end has a Motorola L3276A adapter, and the office end has a telephone style handset (don't have the model number). As of last week, this system will no longer transmit. It still receives fine, but will not activate the PTT on the remote radio, or at least there is no transmitted signal. The fact that is receives tells me that at least the line is intact. I have not yet been to the remote site (several miles away) to look at the radio, but I want to know a little more about this tone remote system before I go: 1) Can I plug a regular telephone into the pair to monitor the signaling? 2) How is the signaling done for TX and RX on the 2 wires? 1950Hz tone or something similar? 3) What should I hear on the line when the PTT on the handset is pressed? 4) Is there a way to passively monitor the leased line audio for the signaling from either end with my HP 8920A service monitor? I don't fully understand the concept of balanced lines, and I don't want to damage any of the equipment by connecting something I shouldn't to it. Any help would be appreciated! Dave Cameron - VE7LTD IRLP System Designer
[Repeater-Builder] Motorola XPR6550 403-470 Portables
If anybody is interested i have 50 overstock new units in the box for sale. These units are new with full warranty. Please contact me OFF the list if your interested. Mike K7PFJ
[Repeater-Builder] Ot, Need a Tool Part #
Hi Group, I am in need of the crimp tool for the 16 connector for the gm300 series. The tool that allows crimping of the pins to wire. Thanks in advance, Ryan n3ssl
[Repeater-Builder] Looking for Glenayre GL-S2164 receivers
Looking for Glenayre 2164 satellite receivers, need six for a special project. Also in need of a motrola RIC (repeater maker) reply w...@w9fs.com Thanks, Jerry
[Repeater-Builder] Repeater using two Icom F121s
Iam building a repeater Using two Icom F121S and the optional cable supplied by Icom I have followed Preston Moores Directions and I have a good Carrier and a strong squelch tail but very weak audio does anybody have any suggestions for me to try I'd appreciate any feedback on this
Re: [Repeater-Builder] Motorola Tone-Remote system troubleshooting question
Dave, If you want to bridge a balanced line to listen, the three operative precautions are (a) make sure you isolate both lines from ground, (b) make sure the device you use for monitoring has an input impedance significantly higher than the nominal line impedance, and (c) make sure to protect your monitor from DC voltage. A battery-powered audio amp made from an LM386, a 5K input level pot and two capacitors works great. (It's unbalanced, but isolated from ground.) Add a 2.2K resistor ahead of the input coupling cap if you want a little more safety. I'm going to date myself here, but I still have a Brush Clevite high-Z dynamic headphone which works well for this. 73, Paul, AE4KR - Original Message - From: ve7ltd To: Repeater-Builder@yahoogroups.com Sent: Monday, March 30, 2009 11:22 AM Subject: [Repeater-Builder] Motorola Tone-Remote system troubleshooting question I don't fully understand the concept of balanced lines, and I don't want to damage any of the equipment by connecting something I shouldn't to it.
Re: [Repeater-Builder] Re: Need supplier for UHF welded yagi
Comprod's main plant is located in Boucherville QC on the Montreal south shore. Like Sinclair, they appear to have a american branch plant to supply the Made in America demand that was opened in 2005. It is located near Buffalo in Orchard Park, NY. Burt VE2BMQ Gran Clark wrote: Lee Thanks for your input! I did call them and it looks like a good shot. Their amateur price was in the ball park. It sounds like a small company in New York. Gran At 09:57 PM 3/29/2009, you wrote: Sinclair makes decent antennas, but if you really want something to survive in a harsh environment, check out Comprod Communications. http://www.comprodcom.com/en/antennas/base/pdf/480-70.pdf They make antennas that survive nearly anything. Out here on the West Coast we routinely get lots of hard rime ice on coastal mountaintop sites, combined with 100mph+ sustained winds. Sinclair antennas get elements snapped off all the time (inherent design flaws, even on their HD antennas). The Comprod antennas keep on going. Regardless, stay away from Bluewave... they may look like a good antenna (and physically they are strong), but some of their models have water ingress problems which lead to antenna failure. Lee --- In Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com, Gran Clark k6...@... wrote: Chuck I will call Sinclair. They don't list a welded antenna. On the beam I have the elements are mounted on the outside of the boom which I would think would be hard to make a good weld if I went that way. Gran
Re: [Repeater-Builder] Ot, Need a Tool Part #
Ryan wrote: Hi Group, I am in need of the crimp tool for the 16 connector for the gm300 series. The tool that allows crimping of the pins to wire. Also, a source for said tool. I want one too!! Mike
Re: [Repeater-Builder] Ot, Need a Tool Part #
At 04:29 PM 3/30/2009, Mike Pugh wrote: Ryan wrote: Hi Group, I am in need of the crimp tool for the 16 connector for the gm300 series. The tool that allows crimping of the pins to wire. Also, a source for said tool. I want one too!! Mike Needle nose pliers and a little solder works just fine AND is quite easy to do. No special tool needed! Ken -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net We don't just make 'em. We use 'em!
Re: [Repeater-Builder] Ot, Need a Tool Part #
I think you're referring to AMP tool # 91516-1 http://parts.digikey.com/1/parts/391772-tool-crimper-mt-conn-20-24-awg-91516-1.html big $$'s for a 1 time use... there are pre-terminated leads available to make harnesses out of which maybe a more practical solution Best Regards, Chris Carruba (WQIK389) CompuTec Data Systems Custom Written Software, Networking, Forensic Data Recovery From: Mike Pugh mikep...@mikepugh.net To: Repeater-Builder@yahoogroups.com Sent: Monday, March 30, 2009 6:29:57 PM Subject: Re: [Repeater-Builder] Ot, Need a Tool Part # Ryan wrote: Hi Group, I am in need of the crimp tool for the 16 connector for the gm300 series. The tool that allows crimping of the pins to wire. Also, a source for said tool. I want one too!! Mike
Re: [Repeater-Builder] Ot, Need a Tool Part #
Ken Arck wrote: At 04:29 PM 3/30/2009, Mike Pugh wrote: Ryan wrote: Hi Group, I am in need of the crimp tool for the 16 connector for the gm300 series. The tool that allows crimping of the pins to wire. Also, a source for said tool. I want one too!! Mike Needle nose pliers and a little solder works just fine AND is quite easy to do. No special tool needed! Worked fine here too until my eyesight got to be 56 years old! :-) Now I need a new tool. (no pun intended) Mike
Re: [Repeater-Builder] Ot, Need a Tool Part #
Chris Carruba wrote: I think you're referring to AMP tool # 91516-1 http://parts.digikey.com/1/parts/391772-tool-crimper-mt-conn-20-24-awg-91516-1.html big $$'s for a 1 time use... No, I am definitely NOT talking about a $570 tool!!! :-) Mike
[Repeater-Builder] CPI Tone-Remote system configuration
While the topic of tone remotes came up, I have a question about configuration. I help to maintain a remote base system in my town. The radio is a Motorola DeskTrac remote base. Connected to this are three CPI TR-10 tone remotes. One of the tone remotes is at the Desktrac location, and the other two are on two separate cable pairs to different locations. I'm not quite sure as to how the three circuits should connect together. CPI documents state that one should be in the 600 ohm terminated mode and the other two in the 5000 ohm mode, but this is when the three are on the same phone line. This does not work well, so I had to put them all in the 600 ohm mode to make them work properly with no ground hums. What I would like to do is put 600:600 ohm isolation transformers on each of the remote circuits to isolate them and hopefully eliminate the little ground hum I still have. I'm wondering if there is a better way. Joe
Re: [Repeater-Builder] Re: Need supplier for UHF welded yagi
OK, you got me... But a statement that the elements break off all the time was a bit of a set up. At your site, I can see it. At 98% of the sites hams are at, this wouldn't be the case. Indeed, you have a unique situation. Chuck WB2EDV - Original Message - From: ve7fet yahoogro...@woldanski.com To: Repeater-Builder@yahoogroups.com Sent: Monday, March 30, 2009 10:44 PM Subject: [Repeater-Builder] Re: Need supplier for UHF welded yagi Yeah, plain 307's don't survive long in conditions like this, even with welded elements: http://www.tparc.org/dogmtn.html That's why all the yagi's are Sinclair 307RCHD, Scala, Comprod, or other similar designs. I've seen dipoles snapped off Sinclair 210C4HD's too due to ice on other sites, and not falling ice either, hard rime ice and wind causing metal fatigue. Also found a SRL249 one spring in the snow, with its .288 sched 40 mount pipe still attached... where it fractured off at the clamp that was holding it to the top of the tower. Explained why the IMTS channel fell off the air. :) Crazy stuff. :) Lee
[Repeater-Builder] Re: Need supplier for UHF welded yagi
Yeah, plain 307's don't survive long in conditions like this, even with welded elements: http://www.tparc.org/dogmtn.html That's why all the yagi's are Sinclair 307RCHD, Scala, Comprod, or other similar designs. I've seen dipoles snapped off Sinclair 210C4HD's too due to ice on other sites, and not falling ice either, hard rime ice and wind causing metal fatigue. Also found a SRL249 one spring in the snow, with its .288 sched 40 mount pipe still attached... where it fractured off at the clamp that was holding it to the top of the tower. Explained why the IMTS channel fell off the air. :) Crazy stuff. :) Lee --- In Repeater-Builder@yahoogroups.com, Chuck Kelsey wb2...@... wrote: A Sinclair UHF yagi with broken elements? I saw one that got run over by a large truck - got a little bent up, but that's all. Chuck WB2EDV
[Repeater-Builder] Re: Motorola Tone-Remote system troubleshooting question
I'll try to take it one by one; First, a quick reference on Tone remotes, at wiki: http://en.wikipedia.org/wiki/Tone_remote (including wav samples. listen to them.) --- In Repeater-Builder@yahoogroups.com, ve7ltd dcame...@... wrote: All, I am trying to help a local group with a remote TX/RX site they have which is remoted to their office with a leased phone line and some Motorola tone remote equipment. I know the radio end has a Motorola L3276A adapter, and the office end has a telephone style handset (don't have the model number). As of last week, this system will no longer transmit. It still receives fine, but will not activate the PTT on the remote radio, or at least there is no transmitted signal. The fact that is receives tells me that at least the line is intact. I have not yet been to the remote site (several miles away) to look at the radio, but I want to know a little more about this tone remote system before I go: 1) Can I plug a regular telephone into the pair to monitor the signaling? You can monitor it, but it really won't tell you anything useful. What you need to know is what levels are going out, at the office end. If you can just put a good, TRUE RMS digital Multimeter on the line, especially if it will read in dBm, you can find out what level of tone you're sending out.Has to be a high-impedance meter, so you don't load the line. Since the tone-remote sequence is 120ms of 2175 Hz, and 40 mS. of function tone (typically 1950 Hz for F1, frequency 1, transmit,) at 10 dB below the level of the first burst of 2175 Hz, followed by a sustained tone of 2175 Hz, another 20 dB below that; let's say your sequence starts out at 0 dBm, then the Function Tone will be at -10 dBm, then the last 2175 Hz will be at -30 dBm. (these are good levels to have; the function tone is supposed to be about the same level as average voice, so there is enough headroom above the voice so nothing clips in the telephone system). 2) How is the signaling done for TX and RX on the 2 wires? 1950Hz tone or something similar? See the wiki 3) What should I hear on the line when the PTT on the handset is pressed? Again, wiki. 4) Is there a way to passively monitor the leased line audio for the signaling from either end with my HP 8920A service monitor? If your scope input has an 'isolated' ground connection, this might be possible. Also, there is a thing called a TIMS, transmission impairment measurement set, which should give you such info. It will measure in dBm, show you level frequency. But not the piece of equipment the average person has; pretty pricey new. That's why you can work with the good DMM. I don't fully understand the concept of balanced lines, and I don't want to damage any of the equipment by connecting something I shouldn't to it. The line should not have any voltage on it at all, DC, and only those small amounts of AC for signalling and voice. Getting to the end of it, if you're sending at the office end, as I mentioned above, and at the radio end, you'll have (let's pick a value) 10 dB loss thru the phone lines. Looking for your Low Level Guard Tone of -30 dBm at the office end, then 10 dB of loss, should give you LLGT of -40 dBm. You can also look at this with a (storage) scope, to catch the rapid tone sequence, and levels. Best quick check is to look for your levels at each end. If you've got too much loss in the line, or it's unbalanced (one side has more or less resistance to ground than the other side; it should be almost infinite Resistance to ground from either side), then the Tone Remote Adapter at the radio end won't decode the sequence properly, and it won't generate the PTT signal. Clear like mud? Chuk Dave Cameron - VE7LTD IRLP System Designer
[Repeater-Builder] Re: Motorola Tone-Remote system troubleshooting question
Some helpful links http://www.braddye.com/purc/purc_tones.html http://www.braddye.com/purc/purc_tones.html http://comtekk.us/tone-generator-ham-radio.htm http://comtekk.us/tone-generator-ham-radio.htm http://en.wikipedia.org/wiki/Tone_remote http://en.wikipedia.org/wiki/Tone_remote --- In Repeater-Builder@yahoogroups.com, ve7ltd dcame...@... wrote: All, I am trying to help a local group with a remote TX/RX site they have which is remoted to their office with a leased phone line and some Motorola tone remote equipment. I know the radio end has a Motorola L3276A adapter, and the office end has a telephone style handset (don't have the model number). As of last week, this system will no longer transmit. It still receives fine, but will not activate the PTT on the remote radio, or at least there is no transmitted signal. The fact that is receives tells me that at least the line is intact. I have not yet been to the remote site (several miles away) to look at the radio, but I want to know a little more about this tone remote system before I go: 1) Can I plug a regular telephone into the pair to monitor the signaling? 2) How is the signaling done for TX and RX on the 2 wires? 1950Hz tone or something similar? 3) What should I hear on the line when the PTT on the handset is pressed? 4) Is there a way to passively monitor the leased line audio for the signaling from either end with my HP 8920A service monitor? I don't fully understand the concept of balanced lines, and I don't want to damage any of the equipment by connecting something I shouldn't to it. Any help would be appreciated! Dave Cameron - VE7LTD IRLP System Designer
Re: [Repeater-Builder] Anyone ever used this repeater controller?
At 3/27/2009 08:17, you wrote: At 3/27/2009 07:36, you wrote: Bob, I've been considering getting one of the NHRC controllers for a GE MVP. Are they dependable, or like your email mentions, having some occasional failures? IMO, no. Our NHRC-micro has failed 3 times. The first time NHRC was nice Follow-up: Since I posted this I've received some e-mails from NHRC expressing concern regarding our failures dropped communications. It appears that there was a misunderstanding regarding a couple of e-mails that led to my conclusions. I am now convinced that they will stand behind their product, most importantly, the exact cause of the failures we had has been determined long since been corrected so current production units should be reliable. Bob NO6B
