[Repeater-Builder] Re: MOVs for power supply primary
Some things to think about. The rated operating voltage of the MOV needs to be greater than the PEAK AC voltage, not the RMS. During an over voltage event (spike or otherwise) the MOV conducts, generating heat. The higher the heat the lower the resistance causing them to go into thermal runaway quickly! This may result in a fire if the circuit is not properly protected by a thermal cutout. All recently UL listed surge protection devices (SPDs) are required to have a thermal cutout next to the MOV to disconnect power in the event of thermal runaway. I have seen many instances where an MOV has been installed without the thermal cutout and the result has been a fire. Many MOV devices will go into thermal runaway before they draw enough current to open a fuse of 10 or 15 Amps, typical of some of the larger power supplies. It only takes a small amount of current to cause thermal runaway where the MOV starts to flame and maybe cause damage to other items or cause a fire if not well contained in a non flammable compartment. As pointed out, the MOV degrades with every over voltage spike. Depending on the electrical environment, their effectiveness may be short lived. The best protection is achieved with a properly coordinated SAD (silicon avalanche diode) and MOV combination. UL1449, Edition 3 is an excellent reference. I would recommend that any surge protection device installed be UL1449, Edition 3, listed to ensure it does not cause a fire. I am referencing commercial devices, not individual components we may install in a project of our own as the individual components are typically not UL listed, only a complete product. When reviewing a product for purchase ensure that it has the UL1449 Ed 3 listing. Not just a UL seal as that could mean anything. Many protected outlet strips have a UL seal affixed but that only applies to the outlet strip portion being UL listed and not the surge protection portion. Generally if the manufacturer has a UL listing for the device as a surge protection device (SPD also previously known as TVSS devices) they will be proud of their UL listing and will have it printed on the label. Be sure you see Ed 3 appended to the UL1449 as the original 1449 of a few years ago did not require the thermal cutout device. Only after several fires was the standard changed to require the thermal cutout on the MOV (actually physically next to and electrically in series with the MOV) With respect to the generator surges Just from reading the post, my thought is that the only load on the generator was the power supply or maybe with an additional small resistive load. I suspect this was a switched power supply without power factor correction. I also suspect that the generator governor was not designed with a tolerance suitable for powering sensitive electronic loads and that there was no voltage and little speed regulation built in. AC power generators like a power factor of nearly 1. Therefore, we must ensure that a goodly portion of the generator load is resistive or has a PF of nearly 1. Many switched supplies have a PF of as low as 0.7. Without an appropriate resistive load to offset this low PF and help get this closer to a PF of 1, the generator may do strange things. Also, generators may exhibit strange operating characteristics when used with power supplies that have PF correction circuits built in. The wrong combination of load and generator may cause damage to the load (power supply). Products designed for international distribution have power factor correction circuits installed, such as several Motorola products. Be cautious when powering these products from small generators that you may typically purchase at your local home center. Those generators are not designed to power sensitive electronic equipment and may cause damage to the equipment. I have seen that happen all too often. Don't try a Motorola Quantar on one of these generators. You may be disappointed. A generator suitable for powering your sensitive electronic loads must have suitable speed (frequency) and voltage regulation built into the product. A reminder to evaluate your field day generator with respect to your load. I have heard stories where folks have brought their valued home station to a field day site only to take the power supply home damaged. I hope this is helpful. 73 Bruce, W3YVV
Re: [Repeater-Builder] Interference from local 600 kHz radio station.
I snowed here yesterday, does that count? ;-) In all seriousness so far we only know that it comes and goes. We've yet to find a clear pattern of day/night, week day/weekend (it's on an office tower) , hot/cold, wet/dry, etc. yet. We hope to do a bit of a fox hunt at the sight later this spring. 73, Bruce - Original Message - From: Joe k1ike_m...@snet.net To: Repeater-Builder@yahoogroups.com Sent: Monday, April 26, 2010 8:16 PM Subject: Re: [Repeater-Builder] Interference from local 600 kHz radio station. There was a 6 meter repeater here in Connecticut that was receiving interference from an AM station several states away that was broadcasting on 1000KHz. It only occurred in the nighttime. (The 6 meter repeater was on a 1MHz split). They narrowed it down to something on the 21+ towers that are on the site, but never found it to my knowledge. It could have been a piece of loose hardware, rusty joint, bad antenna, etc. If I remember correctly, rain made it go away. This can be a real bugger of a problem to find. I would look at guy wires or anything that is long enough to pick up enough signal from your 600KHz station. Does it happen when it rains? 73, Joe, K1ike On 4/25/2010 11:06 PM, lpcoates wrote: Hi We have a local AM radio station on 600 kHz. Their transmitter site is about 10 miles from the center of the city. From what I've found on the web, they run 25,000 watts during the day and 8,000 watts at night. On at least one of our repeaters we're finding that this is mixing with the output of repeater to create a phantom signal exactly on the input. We're not sure whether the mixing is happening inside the repeater or in something in the environment near the repeater. We've confirmed this is the source of the problem on one repeter and supect it on another. Has anyone had experince with a loacl AM station on 600 kHz? We're looking for way to combat the interference. Thanks Bruce - VE5BNC Yahoo! Groups Links
[Repeater-Builder] Look to buy a RICK
Hello all, I'm in need of a used RICK. Any one in the group have a clue where I may get one? Or any help how to make two Motorola radios 1: GM300 and a 2: SM120 work as a repeater? Thank you Bruce
[Repeater-Builder] Old GE radios for free in SF Bay Area
I am doing some cleaning out and find that I have two old High Band GE Execs 100W complete with accessories and cables, speakers, microphnes, etc. They are very heavy so if someone in the South Bay would like them they can have them at no cost. All you have to do is pick them up. I just need more room for what I am working on. Bruce WA6YLV...
[Repeater-Builder] CB operators, then and now
Way off topic. One comment then everyone please drop this thread?!?! In the '70's, you could ask for A Radio Check any time, on any channel, and someone would come back with their location, (10-20), signal strength, etc., . But that doesn't happen these days! I got back into radio for the first time in years... After listening through the cussing, etc., I asked for A simple radio check..Hey, first time I had this rig on the air at all...Can anyone tell me if I am getting out? I just about had to Cuss someone out to even respond, and all I got was, YeahI can hear you.Nothing about their 20, no idea if they were base or mobile, Nothing! A few weeks ago, I hooked that $35 CB radio into my 10 meter Inverted Vee antenna. That antenna was not even right for 10 meters, much less 11 meters (CB). I just was curious to see if it would even RX. It did. The first thing I heard on CB 19 was Road Rage?. 2 guys cussing at each other on the air saying stuff likeWell, follow me into this parking lot and we will have A fun time finding out who is right about that, etc, etc.. You had to have been there...I knew that cheap CB radio would not like it if I keyed the mic. I had NEVER checked SWR on that antenna...Like I really cared...The CB was about $35 NEW..and I can not stand what I hear on the CB bands anyway, so I am worried about the cost Again, you had to have been there. I keyed the CB Mic and broadcasted on CB (Legal so far as I know?)...I said this is (HAM Call Sign, Phonetically), Federally Licensed Radio OperatorThat is why I went to the HAM bands..You will NEVER hear HAMS picking A fight on those bands(HAM Call SignCLEAR!) CB Channel 19 was DEAD Quiet for over 5 minutes!! That was one you just had to be there to get it the way I mean it! Have you EVER heard CB 19 quiet for 5+ Minutes? Bruce in Texas KE5TPN On Mon, 23 Feb 2009, Don Kupferschmidt wrote: Also reminds me of when I was *DUMB STUPID* in my earlier years of CB (before I got my ham license), and I asked on air for a radio check! We still hear those today: Am I making it in? -- Kris Kirby, KE4AHR Disinformation Analyst
[Repeater-Builder] W4ZT Tony King SK
From Bruce in Texas, KE5TPN Never knew this person but 73 and 88 to all who were close to him. NEVER DISRESCECT THE SILENT KEY! RPI my friend, RPI. May the Skip be with you always! Bruce Bagwell in Texas KE5TPN Tony passed away this afternoon at 2:40 after a long battle with cancer. He will be missed by me and all the other friends he made over the years. John, KC4YI
[Repeater-Builder] foreign language translation, on-line and free (babelfish)
Hey Skipp, I always value your advise but had to call you on this one. It is the Four-Part Trilogy (Yes, it is A COMEDY for sure!) Called, The Hitchhikers Guide to the GALAXY BTW, Don't forget your TOWEL! 73 Bruce KE5TPN - In case you didn't know... there is a free on line language translation service, which you can use with text or a web page url. Long before Google was www.altavista.com aka altavista.digital.com ... once my favorite search engines. But Altavista lost its mind in the 90's going crazy with pop-up ads, which really pi$$ed a lot of us off. I mean they were really, really bad about pop-up ads. After thousands of us wrote flaming email comments and jumped ship they finally figured it out and reversed direction dropping the really excessive pop-up ads. I even received an apology Email from Altavista with a beg to try the service again (now without the pop-up window hell). Moving along... A redeeming service within altavista: Inside Altavista is the Babelfish* Translation function, which is killer for converting basic text and web pages for the more common (typical) languages. All I can tell you is to give it a try... Here's Altavista's main page: http://www.altavista.com/ Here's the Babel fish translation page: http://babelfish.yahoo.com/ (now part of the Yahoo Group of Services... Babelfish.com still seems to function pretty well. Example one... A web page in Spanish: http://www.repetidor.com/notec.html Now copy and paste the above web page url into the babelfish Translate a web page line and select your desired from and to language choices... hit the translate button. Now sit back and sip your java (or red wine, no whites or zins) while the service converts the original web page to your language of choice. Not bad... eh (eh added for you Canadians and UP readers) enjoy, s. *Noted. Some of you are fans of or have read The Hitch-hikers Guide to the Universe.
Re: [Repeater-Builder] Re: Astron P/S question
OR, Hi, Hi! You could just do what someone did to the Astron RM-50 I recently rebuild with the help of these guys on the R-P website. What someone did was to, wire and solder A jumper across the A/C HOT input. Then to avoid any shutting down, they disconnected the +12 wire to the Crowbar SCR and tie it across the Neg (GND) wire. Basically, if and when the Crowbar ever tripped, it would never short anything. Anode and Cathode were both tied top GND. Problem solved, Hi, Hi! This Power Supply sure was A mess after A direct Lightning hit to the 100' plus tower. Most of the current went down the tower or Guy wires, but enough went through the not turned-on Astron. No doubt A mess but at least the Power X-Former was still OK. Speaking of Lightning, some head into this area right now. Gotta go! All comments here were meant as SARCASM! Bruce Bagwell KE5TPN The United States will be The Land Of The Free only so long as it is The Home Of The Brave! Support Our Troops!!! For without them, you might be speaking German, Japanese, or Korean! Every linear Astron I've ever owned had an issue with vhf getting into the regulator thru the 12vdc output leads. I've always cured the issue by putting a 0.01 cap across the output studs another to the chassis from the pos stud. Additionally, you could put one from the neg stud to the chassis as well. You may need to experiment with the value. Always worked for me. I dont recall mine ever blowing the fuse though. Blowing the fuse could mean the regulator was off in lala land where it couldn't sense an overcurrent condition or control the output voltage thus causing the scr to trigger. rtc --- In Repeater-Builder@yahoogroups.com, n9wys [EMAIL PROTECTED] wrote: For the learned group here. snipped. Now - here's the WEIRD part. when I was at the tower with another tech and replaced the fuse the time before the last failure, we tried to use his DMM to check the P/S fuse for continuity. His meter acted as if the battery was dead - but later investigation revealed that the meter was getting hit with RF from another transmitter at the site. So I'm thinking that the RF problem may or may not be directly related to MY transmitter. (There is VHF 100W MICOR transmitter directly next to my equipment rack that is on 161.325, and transmits 24/7/365.) Thanks, Mark - N9WYS
[Repeater-Builder] test equipment theft
Eric, I have been A victim of theft myself and do not like it. I feel all such people, when caught, should be shot on sight. Then Strung up on the Rack. Then Hung. Then strapped into the Electric Chair. Then face A firing Squad, again. And finally, if there is anything left, force then to physically hold the antenna of an operating 100KW FM Broadcast Station! It is my understanding, but others please correct me if I'm wrong, Stealing from or otherwise interfering with the operation of A Federally (FCC) Licensed Radio Station, be it A big TV station or A little Amateur Operator, under the LAW, is basically the same thing? Sure, the Dollar amount will probably be different. However both Stations hold A Federal License to operate, Right? Does this not make it A FEDERAL OFFENSE? I am just asking the Group for A little Heads-Up here, not wanting to start another crazy thread. However, It that was me and I ever discovered the identity of this low-life, Piece of excrement, Should it then ever impact the rotating atmosphere oscillator, I would fully prosecute to what ever extent the LAW would allow, including FEDERAL charges! Just my little Humble Opinion Bruce Bagwell KE5TPN If You Can Read This, Thank A Teacher. If You Are Reading This in ENGLISH, Thank A Veteran or Current Soldier! Support Our Troops! For Without Them, We Have No Support at All! To all list members - Please keep a close eye out for the following items which were stolen from my work vehicle this past Wednesday evening 12/3/08 in central NJ: Motorola R2670A service monitor, SN496KWN0084 Bird 43 wattmeter in case with 5 900MHz range slugs Bird 43 wattmeter # 2 in case with 5 VHF UHF range slugs Dell laptop computer with Sprint wireless card, USB drives, etc, all inside a Targus leather laptop case Old (otherwise worthless) Epson 386 laptop loaded with RSS software, and a Motorola RIB with cables, all inside a Targus canvas laptop case DeWalt cordless drill Craftsman 3/8 power drill Craftsman 200pc socket set Misc bit and driver sets And a few other Sony DSC-S750 digital camera in Sony soft case Magellan Roadmate 1412 GPS receiver with bracket/cord Plus a few other items. A $500 reward is being offered for any information which leads to an arrest of the responsible perpetrator(s). There were a few witnesses to the crime, but they didn't think anything of it at the time. Amazing! What a hell of a way to start the Christmas holiday! Thanks for your attention. 73 Eric KE2D 609-713-3742
Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation)
I had no problem with the attachment. You do need Adobe Acrobat Reader to open this. If you do not have Adobe Reader, download it and I bet the attachment will open. I don't have the address handy but do A search for Adobe Acrobat Reader Download. I will bet you will be OK then. Bruce KE5TPN - Original Message - From: John J. Riddell To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 23, 2008 2:05 PM Subject: Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) Jim, The attachment can't be openedmaybe you sould re-send it...? 73 John VE3AMZ - Original Message - From: Jim Brown To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 23, 2008 1:07 PM Subject: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) Her are some interesting comments on the MFJ SWR analyzers that were published in QST. I hope the attached file is not too large for download. 73 - Jim W5ZIT --- On Sun, 11/23/08, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: From: [EMAIL PROTECTED] [EMAIL PROTECTED] Subject: Re: [Repeater-Builder] Need SWR meter recomendation To: Repeater-Builder@yahoogroups.com Date: Sunday, November 23, 2008, 9:21 AM The latest models of the 259/269 have a recessed power switch to prevent it from being turned on accidentally. Bill - WA0CBW In a message dated 11/23/2008 12:53:06 A.M. Central Standard Time, [EMAIL PROTECTED] com writes: Albert, I've had friends joke about MFJ standing for mighty fine junk, but I have nothing but good things to say about my MFJ 259 antenna analyzer. If you're building antennas, the MFJ 259 (HF/VHF) or 269 (HF/VHF/UHF) are really handy. If you're trying to find the resonant frequency or set up a gamma match, they'll save a ton of time compared to an SWR bridge/transmitter combination, and give you more information, such as resistance and reactance displayed separately on the LCD. It also serves as a counter and, in a pinch, as a (not-very-stable and somewhat microphonic) signal generator. But remember the limitations. You can't transmit through them, so they can't be used to monitor the behavior of an antenna under operating conditions. They can't be used to measure a transmitter' s output power like most SWR bridges. They're also prone to error in any environment where strong external signals from nearby transmitters overwhelm the test signal internally generated by the analyzer, which results in a false reading of reflected power. I would recommend these little boxes to anyone, but do have one major complaint - the internal battery scheme. The thing takes 10 AA cells, they don't last long, and you have to remove several screws and the case to change them. You have to be really careful how you transport the 259, because the power button sticks out where any bump will turn it on, and run your batteries down. After having the power bumped on during storage and a resulting leak of the alkalines after they ran down, I cleaned it up (no permanent damage) and just don't put batteries in mine any more. I use it on the AC adapter, a cigarette lighter cord, or an external battery pack, all plugged into the 15V input. But I won't be without one! 73, Paul, AE4KR
Re: [Repeater-Builder] Registered Sex Offenders
I think it depends on location but generally, offenders are PROFOTIBED from making with minors, etc. I have heard of prosucations when they made internet contact. I would think HAM radio would be along the same lines. I would report them to the proper agency them report them to the FCC. Maybe one group will pick the flag up and run with it! Bruce Bagwell KE5TPN If You Can Read This, Thank A Teacher. If You Are Reading This in ENGLISH, Thank A Veteran or Current Soldier! Support Our Troops! For Without Them, We Have No Support at All! Hello I hope Everyone is doing Well , Some things We do not like talking about Except with our Ham friends Privately and I am sure My Topic is one that may effect all of us But I have a Question and I have got a lot of Opinions , But I Need to know if Anyone Has the Real answer and can Give ,Me the FCC Rule Etc A group of us are aware of a Couple Registered Sex Offenders who are Lic Ham Radio operators, They use some of the Local Repeaters . And have Engages in conversations with Lets say Younger Ham radio Operators, Boy Scouts, little league Etc We would like to Know is there is a FCC Ruling against Them still Holding and using a Valid Amateur Radio Lic I know this question will cause a Frenzy of comments, But I am sure others would like to know to So lets keep the answers and comments Civil. All of also know with the homeland Security some clubs have been given funds for Equipment and Training, I would hate for an Incident Come up because of the above Question, normally in Life changes are not made until something bad happens. PS I have a Repeater on 440 and 220 do I flip the big switch on them I am not judging Innocent or Guilt that will be done in a higher place 73 De Don KA9QJG
[Repeater-Builder] Re: New 6M Repeater in Central NH
Nate, I fully agree. Many new HAM's get A scanner to monitor the local going ons (Police, Fire Dept's, etc), or In our area, To monitor SKYWARN during severe weather. Many soon discover there is traffic at times other than bad weather and become interested. Maybe they catch A weekly or daily NET. There are many ways to become interested in this great hobby. There seems to be no end to the learning. New methods, new protocols, mixing radio and computer, voice, digital and CW, etc. As for finding LOCAL HAM's, you sure won't do that on HF! I am A fairly new HAM and there are several people at our club who will just about bend over backward to help or teach you. Give you extra unneeded equipment, teach how to make A simple first wire antenna, etc. No Class Warfare Here! Bruce Bagwell KE5TPN - Original Message - From: Nate Duehr To: Repeater-Builder@yahoogroups.com Sent: Saturday, July 26, 2008 8:02 PM Subject: Re: [Repeater-Builder] Re: New 6M Repeater in Central NH On Jul 25, 2008, at 8:40 AM, Jason Greene wrote: --- In Repeater-Builder@yahoogroups.com, Nate Duehr [EMAIL PROTECTED] wrote: No point in extending the pointless license class wars on a club website though. Nate WY0X I understood that caption as a reference their abilities. If you were familiar with the club up here you would know this isn't a problem- no ego's to deal with. I was a little nervous about saying anything for that reason -- different areas, different people. Not much overt class war going on here either, but a recent e-mail exchange with a grumpy old fuddy duddy who posted to a local VHF+ mailing list that people who use repeaters are nothing more than pickle pushers -- made me react badly to the caption. You know, (and I told him this too)... if he were putting on CW classes, RF engineering classes, and helping people learn, it'd be one thing. But he acts like he came out of his momma knowing CW and how to read Smith charts. That just chaps me to no end. We have plenty of nice folks who have come into the hobby through the use of our repeaters *first* who then learn about simplex, and then SSB, and then digital modes, and then weak-signal optimization techniques and antennas, and DX and... the list goes on, of course. What a great hobby. Repeaters are often the gateway to a lifetime of learning and camaraderie for many new hams. Treating them like crap does nothing to further any useful cause. Sorry had to rant there -- hopefully that's on-topic enough for RB... about repeaters, but not really about building them... unless you consider that they're often the place where the local ham community gets built these days... -- Nate Duehr, WY0X [EMAIL PROTECTED]
Re: [Repeater-Builder] So I watched it NBC Dateline story on Tower Climbers
I agree with most of the replies. Myself have never been up A tower. While I did not expect it to be a training video, the only real bit on safety was the Inspection. It showed a barrel full of Junk (Did NOT pass Inspection) safety gear but she passed with flying colors? I think it was MUCH more SHOW than Reality. Just what is required for any TV show, A few colorful characters, A pretty girl or 2, A job of some kind to do and Human Interaction. Very little Job. Maybe Discovery will pick it up and run it more like Ice Road Truckers and the other Dirty Jobs type shows they do. Still lots of on-the-job friction required for good TV but A lot less Fluff and Junk! Bruce KE5TPN - Original Message - From: Paul Plack To: Repeater-Builder@yahoogroups.com Sent: Tuesday, July 22, 2008 12:32 PM Subject: Re: [Repeater-Builder] So I watched it NBC Dateline story on Tower Climbers Don, You always have to approach watching these things with the understanding that done the industry a better service is not among their goals. It's all about telling the viewer an interesting story. Even reality TV shows have writers! In this case, they seemed to be aiming more toward a plot that would make a good country song. 73, Paul, AE4KR - Original Message - From: de W5DK To: Repeater-Builder@yahoogroups.com Sent: Tuesday, July 22, 2008 9:47 AM Subject: RE: [Repeater-Builder] So I watched it NBC Dateline story on Tower Climbers Good help is hard to find in every trade nowadays. I could have done without the adult day care angle, we all see it every day with current work ethics and morals. They could have done the industry a better service with more facts and public service links to safety training. I think it highlights the industry problem with subcontractors and poor safety training along with energetic young personalities. Or the I can drink till 10 o'clock guy. Seems like a good deal for the carriers and a bad deal for the widows and family left behind. I'm not in the industry so that's just my opinion and I know training will only get you so far. Some people are un-trainable. Some of us hams have climbed allot compared to others, unfortunately most all of us with ZERO safety training. Except for what I read in Tune in the World or ARRL antenna books, I have no training. I have climbed with others and watched and corrected unsafe moves. I get more nervous watching others than climbing myself. The main things I took away from all this reading and discussion was that all the deaths were preventable and 100% tied off needs to be preached. I can't find the NATE training link I saw yesterday. It would be good for the amateur community to be exposed to better safety materials. Maybe I just haven't looked hard enough. I also need to upgrade to newer better safety gear. 73 Don Kirchner W5DK
[Repeater-Builder] NBC Dateline story - List owner post
THANK YOU SCOTT!
Well said!
Myself, I don't even understand what others are having a problem with.
What was that lineCan't we all just get along?
Thanks again. Good Job!
Bruce
KE5TPN
No, I don't feel as though vacations are in order in this situation. The
recent comments being posted, although not necessary, are not generally
offensive. What *I* took offense to was the woman bashing that started to
take place a few days ago. That's what *I* didn't care for and WILL NOT
tolerate.
I think it will suffice to say that those that can watch NBC programming can
watch the show during it's scheduled time tonight. Those that cannot watch
it during the first airing can watch it in reruns, NBC's website, or
YouTube. If it's important enough to a certain individual, they WILL FIND a
way to view the program. *IF* after it is broadcast, someone can provide an
on-line link to the show, that would be fine and much appreciated.
Let's all just sit back and be couch potatoes tonight and see what the
program has to offer while realizing that this is a made for TV program
just like 'Ice Road Truckers', 'Tougher in Alaska' and 'Deadliest Catch'. I
fully expect the program to focus not on tower climbing at all, but rather
on some side management issue having something to do with a relationship
gone south or how towers are not 'green' enough. (I hope I am wrong at this
assumption)
I will say this: If there are any personal attacks on list members or others
during the comments that are sure to follow the program's airing, I am
authorizing any of the list moderators to limit the violator's posting
privileges as they see fit.
Scott - List Co-owner
Scott Zimmerman
Amateur Radio Call N3XCC
474 Barnett Rd
Boswell, PA 15531
- Original Message -
From: skyhawk579 [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Monday, July 21, 2008 11:57 AM
Subject: {Disarmed} Re: [Repeater-Builder] NBC Dateline story on Tower
Climbers
Scott,
Would you please delete all the user's whom keep responding to this
thread that you've already closed?
tnx,
73's
Rick Klinge
KC5UIW
--- In Repeater-Builder@yahoogroups.com, Ron Wright [EMAIL PROTECTED]
wrote:
Bill,
I am not sure who is saying the show is not airing in the USA. It
is scheduled at 10 PM EDT on NBC, Ch 8, on Dateline NBC tonight,
Monday. I am in Tampa Bay area, Florida.
The show Dateline NBC is a USA broadcast company made for USA NBC
viewers and the footage was shot in the USA using USA tower climbing
companies.
This is a
73, ron, n9ee/r
From: Bill Till [EMAIL PROTECTED]
Date: 2008/07/20 Sun PM 11:44:10 EDT
To: Repeater-Builder@yahoogroups.com
Subject: Re: {Disarmed} Re: [Repeater-Builder] NBC Dateline story
on Tower Climbers
It's scheduled on NBC on cable up here in the Great White North
(which is green this time of year). Check your local listings. We
will get it at 11PM from KHQ . I can't understand why it wouldn't be
aired in the USA. 73 .. BillVE5FN - Original Message -
From: Gmail - Kevin, Natalia, Stacey Rochelle To: Repeater-
[EMAIL PROTECTED] Sent: Friday, July 18, 2008 7:08 PM
Subject: {Disarmed} Re: [Repeater-Builder] NBC Dateline story on
Tower Climbers
Just a shame some of us won't be able to see this interesting
doco, not in the cont USA. Unlikely our TV companies will show this
any time soon, maybe ever. Any change someone will record it and
make it available via a torrent? Heres hoping. Â Kevin.
Ron Wright, N9EE
727-376-6575
MICRO COMPUTER CONCEPTS
Owner 146.64 repeater Tampa Bay, FL
No tone, all are welcome.
Yahoo! Groups Links
No virus found in this incoming message.
Checked by AVG - http://www.avg.com
Version: 8.0.138 / Virus Database: 270.5.3/1563 - Release Date: 7/20/2008
12:59 PM
[Repeater-Builder] Re: RadioShack Recalls Power Supplies
I figured that was A local code, not NEC. The only reason I can think of for
that requirement is the ampacity of the 12 or 14 ga wires. While we all know,
in actual use, 2 or more outlets strung along will not all have 15 amp or
higher loads in EACH outlet. However, theoretically, each outlet could have A
20 amp load plugged into it.That is probably why some pencil pusher decided
each outlet needs its own wire. (Never mind the fact the breaker would trip
regardless of what is plugged into each outlet or the number of wires leading
to said outlets, but that's another crazy thread) As for the Breaker Box, I
would assume each also has its own breaker. Trying to stuff more than one wire
into A breaker would more fun than I care to have.
Bruce
KE5TPN
Dave,
This is a code requirement here in my county and think all of Florida.
The code requirements for building is a county/state issue and vary. Most use
the NEC code. Many have additional codes such as having wind resistance
building. The way homes are constructed in the north would not be allowed in
Florida mainly due to the wind. This is why we see so much concrete block
construction with lots of requirements for attaching to foundation and roof
securing. Just different part of the US.
Same with electric code. For various reasons some additional changes are often
made. Just because you have a code in your area does not mean it is in all of
US. It is county mostly with some state codes. In my county there were NO
building codes until the 70s. Can you believe this.
73, ron, n9ee/r
From: Dave [EMAIL PROTECTED]
Date: 2008/07/06 Sun AM 11:43:50 EDT
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: RadioShack Recalls Power Supplies Due
toElectrocution and Fire Hazards
Where is the requirement for running a separate feed to EACH OUTLET
REQUIRED? Not in the US A dedicated out is required for certain
special situations but not for each outlet elsewhere. There are certain
other requirements such as GFCI and AFCI. But, certainly no dedicated
feeder for each out.
Ron Wright wrote:
Gary,
I've noticed in panels the safety ground and neutral go to a different buss
bar. I had thought maybe because the neutral was sometimes, not now to code,
smaller than the neutral. However, both got connected to the panel case. One
can Ohm out neutral to safety and only see the resistance in the wiring
to/from the panel. However, as you well know, should not be considered the
same.
In most plastic coated wireing I see today the safety wire is green coated,
but some is still bare as you said. I've seen lots of this.
Now in our county following NEC code the safety wire has to be same size as
neutral . No more of the 14-2 w/G cable, but 14-3 one being safety ground
color or bare. Also they are doing something different, a separate set of
wires must be ran between panel and each outlet...no more of one wire to one
outlet and then from here to another outlet, etc. Can you imagine the extra
cost and labor. Not sure what they do at the breaker panel...put in separate
breaker for each outlet. Not sure if this NEC code or something to do with
the hurricane code we have here in Florida. We do lots of construction very
different here, hi.
73, ron, n9ee/r
From: Gary Glaenzer [EMAIL PROTECTED]
Date: 2008/07/06 Sun AM 10:19:49 EDT
To: Repeater-Builder@yahoogroups.com
Subject: Re: Re: [Repeater-Builder] Re: RadioShack Recalls Power Supplies
Due toElectrocution and Fire Hazards
I don't know what part of the US you live in, but around here (western IL)
the grounding conductor ('safety ground') is bare in Romex-type cable, and
may or may not be insulated in conduit, and usually one size smaller than
the 'main' conductors.
Also, the GC goes to one bus-bar, the neutral to another, the GC bus-bar is
bonded ot the neutral at the SERVICE panel (incoming power, the one with the
'Main' braker that shuts off all power), but is kept separate in all
sub-panels, and from the sub-panel(s) there must be a separate GC (coded
green) run back to the GC bus-bar in the service panel.
Ron Wright, N9EE
727-376-6575
MICRO COMPUTER CONCEPTS
Owner 146.64 repeater Tampa Bay, FL
No tone, all are welcome.
Re: [Repeater-Builder] Re: RadioShack Recalls Power Supplies Due toElectrocution and Fire Hazards
There are many makes of voltage sensing sticks one can get basically anywhere. Many times I have seen outlets Converted to 3 wire from two, only to find all they did was ground from the neutral wire. That means I get all kinds of RFI and if the Ground ever dropped, it would be HOT just from the return from the light bulb or whatever. BTW, those cheap Testers will NOT detect HOT/Ground/Neutral Reverse! If in doubt, run a wire from a known ground to your Meter and find what wires are Hot I remember A house I rented, every time I touched the light switch/outlet in the garage I got tickled Glad I knew what was going on or else I might have made full contact, and I would not be typing this right now! Swapped the HOT/Neutral/Ground and all was OK! Always remember, just because the outlet is Grounded does not mean it is really Grounded Verify! Stay safe out there! Bruce Bagwell KE5TPN If You Can Read This, Thank A Teacher. If You Are Reading This in ENGLISH, Thank A Veteran or Current Soldier! Support Our Troops! For Without Them, We Have No Support at All! The inspector I used checked every outlet in the house, found one in the garage that had line neutral reversed. It is tagged as such, is now only used with fully insulated loads such as Christmas lights. Bob NO6B My brother lived in a house with two wire plugs he changed to three wire plugs. He just jumpered the neutral and ground together on the plugs. It fooled the inspector with the little plug in light up gizmo. I highly recomend one of these to anyone working around electricity. http://us.fluke.com/usen/products/Fluke+VoltAlert.htm?catalog_name=FlukeUnit edStates Best $20.00 I spent. tom n8ie
[Repeater-Builder] RE:Forced Battery Revert
Verision, in the Dallas, Texas area, recently sold their interest in BPL to Oncor, Which was part of TXU before it was split apart, who is the local power Billng and Powerline company for several million/billion, I don't remember the exact mononatary number, like it really matters anyway!. It was more money than I have in any case! The Local News said, part of it was to inform TXU/Oncor when the power was out at any particuliar address. WELL! I guess the Cat just got out of the bag! Fellow HAM's, LOOK OUT!, and have the addresses for your Congress Critters At the ready! (Please Remember, if no one contacts the Congress Critters, they Think it MUST be OK) Broadband via PowerLine, while it is workable, tends to interfere with low freq. communications including, (Of Course), those of the HAM Community! I will leave it there and let the rest of you please pass it along. BroadBand Via PowerLine is BAD for us unless THEY can PROVE that it will NEVER INTERFERE with our COMM's! Bruce Bagwell KE5TPN .
[Repeater-Builder] New Files Available
Hello All, I have SERVICE MANUALS for the following: Johnson 511, 512 (Intermin Service instructions) Johnson 552/553 Industrial Repeater Johnson 949 VHF Community Repeater Operators Manual for GE MASTR Controller and Deskon II Willing to sell for best offer OR If the group can pay shipping BACK, I will pay shipping there for copy and posting on website so long as copyright laws are not broken. Have not checked the R/B web site. Just found this stuff and thought someone might be interested. Also have many SERVICE MANUALS for other older JOHNSON products. Mobile, Handheld, chargers,etc. Same offer. Also, MANY SAMS PhotoFacts for CB radio and Scanners from the 1970-1980 era +/-3 years? I can probably scan small sections if needed. Pics, etc are available, Prices neg. Contact me OFF LIST. KE5TPN AT swbell DOT net Thanks for the previous help! Bruce Bagwell in. Wichita Falls, (Tornado Alley,Texas (Remember April 10, 1979!) I, myself, will never forget it! That is why I am thankful for the Storm Spotters in my Area and plan to be one of the Same in the near future!) You want more proof I'm in Tornado Alley? The Tornados in Moore, OK., BOTH of those,(2 years apart) just missed the house I USED to live in only A few years before! Any wonder why I am thanking the Spotters, and why I want to become one? THANK YOU SKYWARN! (And of course, the HAM's that actually do the dirty work!) By that I mean the Storm SPOTTERS as opposed to the Storm CHASERS who get in the way of the people who really help Bruce Bagwell KE5TPN IRLP Node# 4640
[Repeater-Builder] antenna question - Dip It and Scotch Kote and Kry
OK guys, along this same line, I have a VHF all copper J-Pole and plan on building UHF all copper J-pole. Is common clear lacquer OK to prevent corrosion on the copper elements? I have used automotive type black silicone under 2 wide electrical tape to seal connections and the coax itself. The Coax to antenna connectors have been soldered to the copper tubing after finding best SWR. Other choices, Clear enamel, colored lacquer/enamel etc. Other stuff I have not even thought of? mainly just stop the copper from turning green but don't want to mess with the antenna in any way. This will be used beside my house and not at some far away repeater. Limited life is OK so long as I am aware of limitations. Bruce KE5TPN This painting of antennas seems to be on many of our minds. Wonder what the antenna manufactures would recommend or what they use if any??? After you get beyond the sales person who swears their products are rock solid and don't need painting or additional protection then you might get someone who would give some info. I would hope they would have done testing for anything they recommend, both SWR and pattern and signal. 73, ron, n9ee/r From: Chuck Kelsey [EMAIL PROTECTED] Date: 2008/05/04 Sun AM 08:52:31 CDT To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote and Krylon Funny you should mention Krylon... although I haven't done so in recent years, I used to Krylon (clear) all antennas and never had a problem. I forgot all about that until your mention of it. And they were mostly UHF antennas - beams and folded dipoles. Go figure. Chuck WB2EDV - Original Message - From: skipp025 [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, May 04, 2008 9:44 AM Subject: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote I constructed a 6 meter beam some years back, worked like a bomb even at 25ft above ground elevation. To ensure my pride and joy would last a long time I sprayed it with clear Krylon brand spray paint. The antenna was instantly unusable regardless of my efforts to remove the paint, re-tune or otherwise modify the antenna. I later learned that type of paint contained materials with a horible D-Factor. I was never able to use the antenna again, although it remains in my back yard as a reminder. cheers, s. Ron Wright, N9EE 727-376-6575 MICRO COMPUTER CONCEPTS Owner 146.64 repeater Tampa Bay, FL No tone, all are welcome.
Re: [Repeater-Builder] Re: Yahoo burp?
It's been awhile since anyone has heard from me, still shaking off the cinders from all the Flames sent my way! While those who Flamed are right, it was a stupid answer, I have noticed that many (Most) times never get the original message of the thread. The 2 week old post proves it! There was even a reply to this very old post! While I do not know what is going on, at least it helps explain the dumb posting I read several of the threads but either didn't get all the other threads, etc. or they came AFTER I sent my message. Please remember that thread went ON AND ON AND ON. While had I all the postings I would not have sent what I did, please remember all the Experts never did agree on this simple matter. Many even suggested to ask the FCC! While I am new to this hobby I know this well from other dealings with Government, NEVER ask them for an opinion on something that is really minor and no one can agree anyway. Many times, you will not like what they tell you! Amateur radio is supposed to be Self Policing and should remain that way! When I studied for my HAM ticket, I was really impressed by the fact for once Government is doing what it should do. Set-up a few basic rules, provide for enforcement and prosecution for breaking of those rules then stay the heck out of the way!!! The more times we HAMS ask Government for answers to really Non-Problems, we invite more regulation to our hobby. On the same topic of our hobby, while I admit I made A Dumb Answer, Those who chastised me in the group format more than once is no way to build the number of HAMS! Most of the HAMS I have met are older, where is the young blood to keep all going after we are gone? I help to provide Comm. a couple weeks ago for the local Boy Scout Canoe Races. I was so impressed when young Scout came to me and said I'm A HAM!. I asked him What is you Call Sign and he replied Are you kidding! I can't even remember my phone number! OK, this young Scout probably didn't use his HAM ticket but at least he had one! I think we ALL need to do whatever we can to promote the hobby to everyone we can in particular the young ones! Just brushing off the cinders! Sorry about the dumb post. Maybe that is a result of Spam Filters, different ISP's, etc. I would LOVE to know why something I sent 2 weeks ago just showed up yesterday! Seems the same thing happens all the time for me, just not quite that late! BTW, I know 10 meter is basically dead due to the Sun Cycle. However I have been given a 10 meter radio, Base and Mobile Antenna. What are the popular freq's, modes and beacons for this band? Hope this question isn't too stupid! Just thought about it and have not even had time to search the net for the answer. PSS. Thanks for the help on the Astron P.S.! Now have that critter working just fine with added V A meters and a resistor/relay Soft Start Meters have been calibrated and re-scaled. PS never pops my weak house breaker and that should help the life of everything without the Hard Turn-On Surge\ Now I have the 12VDC power to run almost any mobile radio as A Base rig. Thanks again to all those who helped! Bruce Bagwell KE5TPN -Original Message- From: Bruce Bagwell [EMAIL PROTECTED] Sent: Apr 8, 2008 1:05 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Amateur repeater ID's [snip] This message was posted 2 WEEKS AGO Does Yahoo have the hiccups? .
[Repeater-Builder] Amateur repeater ID's
Every repeater in my area ID's on the hour. Sounds to me like it is either the freq. (rate) of the ID, (Say every 15 Min.) or the reference to the website (More likely) that the FCC is having problems with. But MAINLY this station seems to be interfering with another station on A nearby freq. (Freq. Coordination, not required but HIGHLY recommended!) BTW, many Repeaters in my area, with the ID say The Time is or Good Afternoon/Morning, the time is, Does the FCC consider Broadcasting? I guess not. Bruce KE5TPN From: Paul M Schmitter That last paragraph is badly worded. Wheen I read it the first time, I understood it to mean that the reference to his website was the broadcasting being written about, but after reading it again, it leaves some doubt as to whether the IDer is also considered broadcasting. --- Tony L. [EMAIL PROTECTED] wrote: The most recent case posted on the FCC's Amateur Radio enforcement actions web site is this one: http://www.fcc.gov/eb/AmateurActions/files/BEDNA07_05_25_1078.pdf --- In Repeater-Builder@yahoogroups.com, George Henry [EMAIL PROTECTED] wrote: Can anyone point me to the specific enforcement case or warning letter where the FCC first said that regular, periodic repeater ID's irrespective of repeater usage were broadcasting and had to stop? The FCC's online archives don't seem to go back far enough (seems to me it was in the 80's), and all the references that DID turn up dealt with specific interference cases, not the broadcasting issue. A news item in a QST or CQ column would be sufficient... Thanks. George, KA3HSW / WQGJ413 __ You rock. That's why Blockbuster's offering you one month of Blockbuster Total Access, No Cost. http://tc.deals.yahoo.com/tc/blockbuster/text5.com
[Repeater-Builder] Mot Micor T74RT3000AA
Hello All and thanks to all who replied. A bit of my history. I am a self-taught with mail-order electronics courses and the time-to-time help of fine people like you guys. A machinist by trade until major surgery that left me disabled with Chronic Pancreatitis. Most of my electronics work is with AF amplifiers, light control systems (night clubs, etc.) and some TV work. Computers since my first TI99-4A in the early '80's. Computers, I only go to board level. Parts are too cheap to even bother trying to figure exactly what is wrong, just plug in a new board. Besides, I don't have the eyesight or super steady hands for the newer SMT stuff! Besides,I don't do electronics on a daily basis. Seems like only when something quits and needs to get fixed. When it comes to Radio, while I know the theory from my studies (And I need to go back and brush up for sure!) the actual practice is another story. That is why I have thrown a few questions your way. When I was asked to go through, catalog and dispose of this Gentleman's Radio shack, I decided to get my HAM ticket. There would never be a better time for sure! This Gentleman worked for Business and Govt., working mainly on Johnson and Motorola, and never threw anything away! This Micor probably got in the back shed because it had problems and the company just bought another, etc. I simply thought it might be a good way for me to learn by doing. I asked you guys about it because like I said, I know the theory but you guys know the practice better than I ever will! I fully agree, and it has been said many times in this group, to ALWAYS get something working like it was BEFORE making any changes. At least that way, you know everything was working until you started changing stuff, etc! I have yet to find A Micor control head but looked at schematic. If schematic is complete doesn't look like much to build one. Also, have A (from memory and hope this is right) Motorola Talk-A Phone head like I remember seeing in every Cop Car and TaxiCab in the ;late '60's and '70's. Maybe that could be adapted. One question, according to the Model #, this Micor was 2ch. TX and 2ch. RX. Does that mean there should (could) be another element? As for the newer stuff, will soon be buying a Kenwood TM-V71A Dual Band Mobile rig. Again, only thinking about this for practice and learning. I have all the test equipment except for a spectrum analyzer (DMM, O-Scope, Comm. Monitor, Freq. Counter, Dummy loads, etc.) Remember, I am going though the estate of someone who did this for a living, plus the test equip. I already have. All that being said, I will have many things for sale soon, but on this topic, I have found several Motorola elements and Johnson X-Tals. The Mot's are: Qty 4 of P/N K1005A (2)-R155.605Mhz 15767.222Khz (1)-R155.790Mhz 16.01000Khz (1)-R154.950Mhz 15.91Khz Qty 1 of P/N K1007A T-158.235Mhz 13186.250Khz No idea if these are good or not, no way to test. Will use gentleman's agreement. send to you then you send back $$$ if seems OK to you. You tell me what they are worth. As for the Johnson X-Tals, they are in original envelope, most with Comp. Cap. Too many to list here. If you need one, send either P/N and/or Freq. And I will see If I have it. Also have Com Monitor IFR FM/AM 1200A. Sorry, not the S Model with Spectrum Analyzer. I also have a 100ft.+ AGL guyed tower QTH Wichita Falls, TX. However, this owner simply wants someone to take it away for free. Come get it and it is yours. Sorry for the long letter but it might help you guts better understand me. The RF stuff, in practice, is new to me and I well know electricity can do some really weird things at high freq's! and I don't, as yet, understand all of it. Will stick my nose back in the books for sure! Thanks again for all the help! The Repeater Builder Site is A wealth of info for sure!! Bruce Bagwell KE5TPN I wrote: I already know this is UHF mobile unit. I have the connector and cable (s). What I need to know since I am new to all this RF stuff and think this would make a good project is, is this all here? Unit was found in an old shed. Lots of corrosion in the PA section. connectors undone and bottom cover plate missing. Not a problem. I want to use this in the 440-450 Mhz HAM band. The only element in it (I understand there should only be one) is for R-451.875MC/1.8340.625KC Mot P/N KXN1024A.
[Repeater-Builder] Re: TPL Repeater AMP
The label says 136-174Mhz And was set to 153.92. 10-20W In=200-250W Out. [EMAIL PROTECTED] (Fuse is 40A) 120VAC for cooling fan only P/N PA3-1FF and hand etched the letters RF It appears to be similar to the other PA3's according to manuals found on Repeater-Builder Website but with more power. I want to use it as A 2 Meter HAM Linear. I was thinking that will not work since the output freq is set regardless of the input freq. Thanks again, Bruce (Give me a few weeks on the CallSign!) (Tech Test 2-30-08. Should pass easily) (The ARRL study book covers everything I need!) many of these are strip tuned and cannot be retuned easily. On the other hand they are sometimes quite broadband also. If you want to use it on 2 meters it may work on the top end of the band with maybe only a small loss in output. Quoting pooterwizz [EMAIL PROTECTED]: I am taking care of an estate for the Widow. I have a TPL PA3-1FF(RF) Repeater Amp. It has connections for both 13.8VDC and 120AC for the cooling fan. It has a label factory adjusted to 153.92. Question, how does one change the output freq? The manuals on this site do not cover this model. I can use it if I can change the freq. If not, does anyone need this and the 153.92 freq?
[Repeater-Builder] Re: Astron RM-50A Power supply
Thanks, I finally figured this critter out last night. I found the P/N on that SCR barely readable, but there. It was the 2N681, that Astron told be it was. Further checking shows it to be 25V/25A. Light! That's probably why they went to that 50V/65A unit that crosses to nothing! I found all I needed at Digi-Key rather than going through Astron. Hey, when I can't even send email, do they think I am going to order parts? NOT! Does anyone know what is used for the AMMETER? I want to add V and A meters. I have a large Ammeter (feed through) but the schematic shows current being sampled and run through a 500 Ohm pot. I have many 1 milliamp meters. If I can find the right pot and/or fashion a by-pass wire across the meter then re-scale it that would be nice. I never have liked the idea of feeding full current through a meter! The lightning appears to have gone around the outside of the unit. All 8 pass transistors shorted. 5 of 8 emitter resistors open. The MOV blown right off its leads! Best of all, one mounting on a pass trans appeared to be stripped, no turning it from outside or inside with pliers. I then realized the trans was loose! I pried it out and saw the screwhead WELDED to case! The control board, filter caps, rectifier diodes, driver trans, power transformer and all else appear to be OK. Thanks again for the help All! Bruce (PooterWizz) (CallSign coming soon) (Tech Test 3-20-08) I had this same issue about a year ago. Their replacement SCR required minor modification to the enclosure in order to mount but otherwise worked ok in my RM50M. In my opinion Astron does a very poor job of documentation and support (especially phone support) so I often stay away from their products. Gary pooterwizz [EMAIL PROTECTED] wrote: Hello Group! i hope some one can help me here. I have An Astron RM-50A Power Supply that took A lightning hit! All 8 pass transistors (2N3771) are toast, but the 2N3771 driver is OK. The rectifies diodes are OK and the power X-Former is OK. My problem is the crowbar SCR. This is a TO-48 case with MICA insulators. I phoned ASTRON and got conflicting answers. The schematic I have calls for a SO565J SCR. Astron says this is an INSULATED case device rated @ 65A 50V. When I told him mice had mica, he said I had an older unit (circa 1983 and the SCR is A 2N681. I checked this critter and it is 50V @25A. That seems light for a 50A peak crowbar! Does anyone know of the correct P/N or proper cross reference? BTW, the email link at the Astron website is dead. I was told (By ASTRON), the CORRECT email is: [EMAIL PROTECTED] When I tried to send mail to that address it came back also. WHAT GIVES!!! .
Re: [Repeater-Builder] Re: 6mtr duplexer
Al, Using 3 1/8 Heliax is approaching the proper length to diameter ratio for optimum Q which should provide a deeper notch and increase the total isolation. It may even be enough to eliminate one cavity per leg. All of the designs I've seen use the foam type, I doubt the air line insulator supports will provide enough mechanical stability. Bruce, WB6ARE On Mar 16, 2006, at 7:31 AM, Al Wolfe wrote: Most of the discussion I've seen for the 6 meter Heliax duplexer has been centered around using 1 5/8 Heliax. Has anyone used 3 1/8 stuff? Would there be any advantage to using the larger size? I have some available. Has anyone used the foam 1 5/8 instead of air line for a duplexer? Thanks, Al, K9SI Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Balloons to be tested as cell-tower Replacement...
Good Day Last October at the Armadillo Intertie Annual meeting I attended an excellent presentation and live demo by Space Data Corp. The balloon was at about ninety thousand feet altitude somewhere east of Dallas and we talked with one of their engineers in Dallas via a 900 MHz HT from Austin, TX. The DSP in the balloon was reprogrammed from it's normal data mode to repeat voice FM for the demo, running about 3 watts on a low gain antenna. The balloon payload weighs a maximum of 6 pounds (per FAA), this includes the battery, TX/RX, a GPS to measure position in three dimensions, DSP and sand for ballast. It takes 1-2 hours for ascent to 90k feet, a valve releases excess helium to stop the ascent and then releases sand to compensate for helium leakage and maintain the altitude for the typical 12 hours of usable time. It takes 6 balloons to provide coverage and redundancy for all of Texas so in a 24 hour period some 12+ balloons are launched every day to ensure at least 6 are continuously at altitude. Payloads cost ~$1500 each and can be reused about 10 times, their recovery rate is around 90 percent and the payload sends it's GPS position back up to the balloons on orbit as they descend via parachute clear down to ground level. Their primary use has been for vehicle tracking and data collection. Space Data Corp has been doing this 7/24 for over two years for Texas. This system is being evaluated for Mexican boarder patrol using something like seven balloons and also for military communications for all of Iraq. It should be interesting to see how well this works for cellular. These people are serious and know how to do this technology better than anyone else. Some of them are hams too! http://www.spacedata.net/ Bruce WB6ARE Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Balloons to be tested as cell-tower Replacement
Good Day Last October at the Armadillo Intertie Annual meeting I attended an excellent presentation and live demo by Space Data Corp. The balloon was at about ninety thousand feet altitude somewhere east of Dallas and we talked with one of their engineers in Dallas via a 900 MHz HT from Austin, TX. The DSP in the balloon was reprogrammed from it's normal data mode to repeat voice FM for the demo, running about 3 watts on a low gain antenna. The balloon payload weighs a maximum of 6 pounds (per FAA), this includes the battery, TX/RX, a GPS to measure position in three dimensions, DSP and sand for ballast. It takes 1-2 hours for ascent to 90k feet, a valve releases excess helium to stop the ascent and then releases sand to compensate for helium leakage and maintain the altitude for the typical 12 hours of usable time. It takes 6 balloons to provide coverage and redundancy for all of Texas so in a 24 hour period some 12+ balloons are launched every day to ensure at least 6 are continuously at altitude. Payloads cost ~$1500 each and can be reused about 10 times, their recovery rate is around 90 percent and the payload sends it's GPS position back up to the balloons on orbit as they descend via parachute clear down to ground level. Their primary use has been for vehicle tracking and data collection. Space Data Corp has been doing this 7/24 for over two years for Texas. This system is being evaluated for Mexican boarder patrol using something like seven balloons and also for military communications for all of Iraq. It should be interesting to see how well this works for cellular. These people are serious and know how to do this technology better than anyone else. Some of them are hams too! http://www.spacedata.net/ Bruce WB6ARE Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] FS: MP100 Repeater Controller $225.00 OBO
Very interested. How much? With the proper code will it set the PL tone on and announce PL tone xxx on Beginner here, bear with me. Thanks... Bruce Bruce Van Houten B.S., RT (R)KB1IIX [EMAIL PROTECTED] On Jan 29, 2006, at 10:43 AM, Shawn Mielke wrote: I had bought this to use on my repeater. Never got around to using it, and kept my 5k controller (no bells and whistles). It's in an metal box enclosure, and works perfectly. Does voice synthesis and much more. Here is a link for some info: http://hamradio.lakki.iki.fi/new/Repeaters/Controllers/ mp100_repeater_controller/mp100_design.html#MACROS%20ZONES%20COMMANDS Works great. I am just selling off my excess stuff. If I don't sell it on here, I will end up posting it on EBay. Thanks. -Shawn Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Motorola Micor Mobile
Makesure the tx/rx antenna switch is working properly and check the power set board in it. It can shut down the P.A. deck if not working properly. Bruce, KD4BOH. - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, January 05, 2006 3:17 PM Subject: Re: [Repeater-Builder] Motorola Micor Mobile In a message dated 1/5/2006 2:51:14 PM Central Standard Time, [EMAIL PROTECTED] writes: I have a Micor mobie that is getting power to the exciter but not showing and power out of the PA. I think the finals are good but could be wrong. Not an electronic genius. Thanks Any help would be appreciate Hi there! Been there, done that! You may need to check the bandpass filters. The exciter should be around .4-.5 watts out, and the bandpass may not be "passing" especially at ham freqs! As an old friend said, "Tune for max smoke"on both filters, but remember that's how Moto kept the spurs in check! Make sure you double check for Clean Output! 73, Brian YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Repeater Funding
Just an idea, I got $3000.00 of Homeland Security money by going thru local EMA office that had access to alot of different grants. The catch is: Having someone that knows what to say and how to write the grant and be involved with a Government funded Entity. Example: I got 5 dual-band antennas and 500 ft 1/2 hardline for 5 remote receive sites that was put on water towers. Only catch, If I take my system down I have to leave the antennas and hardline. Otherwise I have total control. The repeater system does belong to me. But just thought this might give you an idea. Bruce KD4BOH - Original Message - From: goldvetter [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Wednesday, January 04, 2006 11:23 AM Subject: [Repeater-Builder] Repeater Funding We have a repeater that needs to be gone through and replaced. Our club has very little funds to replace the equipment. What if any kind of funding is out there to help defray the costs of the new equipment? Thanks in advance, Steve KCØTJH 73's Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: Static Cling (was - polyphaser)
Ok, There putting strips on the bottom of Target and Wal-Mart shopping carts to keep static down when a customer grabs the handle. So why wouldn't this work well on a vehicle? Thanks, Bruce KD4BOH. - Original Message - From: Kevin Custer [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Monday, January 02, 2006 7:46 AM Subject: Re: [Repeater-Builder] Re: Static Cling (was - polyphaser) [EMAIL PROTECTED] wrote: Hey, ya drag your feet on the carpet .. aren't you thus 'connected' ?? Shockingly, no. g Interesting that this would come up... Last year, before installing a whole house furnace humidifier, I got zapped every time I reached for a light switch (screws are grounded). Many times it would draw an arc of 1/4 inch or more. Just for the heck of it, I did a test. I put on my shoes and drug my feet across the carpet and with a NE-2 neon bulb, touched the screw on a convenient lamp switch. Many times I would build up enough static electricity that I could make the bulb burn for about a second, and sometimes it would snap (arc across?). I took one of the Static Busters and put the end that gets mounted in my mouth. I did the test again, and was very surprised that I couldn't build up enough charge to make the bulb light. Kevin Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] DB224-E Data
Doug,Thanks for the DB224E data, your document is outstanding and I appreciate your time spent getting the details in a PDF.Bruce WB6AREOn Dec 12, 2005, at 9:05 PM, Doug Zastrow wrote:To All I Promised this Info, My DB224-E sketch will be on its way to your inbox tonight. If you don't have it by morning email me direct at dzastrow -at- qwest -dot- net. I'm also forwarding a copy to Mike Morris who several months back graciously offered to review it and post it to the Repeater Builder web site. It's quite ironic in that the antenna I documented went aloft to 310 ft. today. It replaced an old DB224 which had developed a crackling noise when in duplex operation. The culprit was a winch line burn going halfway through the phasing harness as well as a cracked dipole. (Pics below.) My apologies for the sketch delay. I have been working 60-80 hour weeks the past three months and I put sleep ahead of completing the sketch. Hope it fills everyone's needs. Regards, Doug Zastrow, WBØUPJElkhorn Valley ARCNorfolk, Nebraska (Highly compressed and reduced picsas a courtesy to lo bandwidth users.) Winch Line Burn 01c901c5ff92$18738860$6401a8c0 Dipole Crack 01ca01c5ff92$18738860$6401a8c0YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] UHF Micor Mobile PA Question
John, You should be able to get 100 watts or better... but it won't last very long. Per Motorola's spec sheet the UHF mobile is rated at 35 watts maximum for continuos duty which is what a repeater does. The same ceramic PA sections are used in the Compa-Station but they are mounted on a heat sink that has one fifth the thermal resistance and they derate it to 75 watts output . Even at 35 watts out you will need fans on the outside heat sink and blowing right on the ceramic substrates. Micor PA's are well known for un-soldering their parts and generally not real reliable.You would be better off to totally bypass the four final PA transistors and use just the 45 watt PA driver stage. It will draw much less current and generate less heat with just the driver as compared to running the final PA at 45 watts.My thirty-two year old Micor mobile that was converted to a repeater twenty years ago was happy running 35 watts with fans until a recent lightning hit. It's repairable but I decided it had a good life replaced it with something more modern. So once again I'm running hardware that some else though was junk. Bruce WB6ARE On Aug 16, 2005, at 7:18 PM, John wrote: Hello group. I have just duplexed a 100 watt 450-470 Micor Mobile. Next I installed the crystal for 447.95 RX, with high side injection to give me 442.95 TX. The radio is now tuned up on frequency, but I am only getting about 65 watts output, max, at about 20 amps of current. I have double checked everything; LLA output OK, tried a 2nd re-tuned circulator, tried driving the radio with a signal generator connected to the RX injection cable (to be sure that I was really tuned to the right harmonic). Everything seems OK, so my question is how much power should you be able to get out of a 100 watt Micor on 442.95 Mhz?? Thanks for any info you can give. 73, John, k9KA Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: receiver combining (Was Digest Number 3263)
OK Al, I am using 75 ohm split on two Micors with a preselecter on each. Seems to work rather well. I bought a CATV 10 db adjustable gain splitter from Radio Shack several years back and converted it to 12 volt to run on battery back-up, but never had the need to use it till now. Sounds like we're along the same thinking on this. So we take the preselecters off the Micors, put on the RS 4-way splitter, gain set to over come loss. What about jumpers, 75 or 50 ohm ? Does it really matter, and do they need to be 1/4 wave length of the freq. they are hooked to ? Thanks, Bruce KD4BOH. - Original Message - From: Al Wolfe [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, August 04, 2005 12:56 AM Subject: [Repeater-Builder] Re: receiver combining (Was Digest Number 3263) At 8/3/2005 06:14 AM, you wrote: Bruce, One common method of combining two receivers is to use a coax tee at the antenna feedline and 1/4 wave pieces of 75 ohm coax from the tee to each receiver. This can be expanded to four receivers using six pieces of 75 ohm coax, but probably isn't worth the effort. But what if the RXs have high Q filters in the front-end that look like an open at the other RX's freq.? The 1/4 wave transformer will turn that open into a short at the T, shorting out the RF that otherwise would go to the other RX. Sounds unlikely? I know of one group that did this to their repeater a while back. The result was a deaf repeater providing a disservice to the amateur community for many years. Use a power splitter, either CATV or 50 ohm (Mini Circuits). The port-to-port isolation will save you much grief in the long run. Bob NO6B Bob, If it was the truly the case that the receivers had a high impedance at off channel frequencies then you could just hook them all together in parallel and be done with it. However, most receivers have very low impedances off-channel. (Also, few front ends are ever actually 50 ohms resistive anywhere for that matter.) Because of the low impedance of off-frequency front ends, receivers with noise blankers usually have their two receiver inputs in series and the blanker receiver must be tuned several mhz. away from the main channel to not cause the sensitivity to be compromised. I suspect that if the group with the deaf repeater had added a few inches of line to the other user's receiver their problem would have been solved. I have aircraft receivers from the FAA with two antenna jacks, one in and one out. Several receivers can be daisy chained together this way. The last receiver has a shorted N connector on the antenna out port. Effectively, all the different receivers' first RF coils are in series with each other. The 1/4 wave, 75 ohm coaxes were/are commonly used with DFE (dual front end) receivers or stations with two receivers. As you say, however, the splitter is usually a superior method of combining receivers from one feed. The ones from MiniCircuits provide 20 db or more isolation between ports and the lengths of feedline from the splitter to the receiver isn't critical. The complex reactance's of the receiver front ends are isolated from each other. A dead short across one of the output ports will have minimal effect on the other ports. Another benefit of the splitter and its isolation came to bear in a situation I had several years ago where we had several UHF receivers sharing a common antenna using the 1/4 line technique. Very strong signals on one receiver could often be heard on another receiver in the cluster. Turned out that some of the mixer injection from one receiver was getting back out though the RF stage and into another receiver. A splitter with 25 db of isolation between ports got rid of the problem. 73, Al, K9SI Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: receiver combining
OK on RS amp. That is why it has laid on the shelf for so long. A preselecter is Motorola's term for their internal preamp. It has 3 to 9 db of gain and they have tunable pass notch in them to narrow it to freq. your on. They are usually not very good for broadband window. I have never heard mini circuit company, I'll have to check them out. Alot of people on here refer to them. Thanks, Bruce KD4BOH. - Original Message - From: Al Wolfe [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, August 04, 2005 9:23 AM Subject: [Repeater-Builder] Re: receiver combining Bruce, I don't think you will be happy with an amplified splitter from Radio Shack. Your concept is valid but the RS amp will probably have much too high a noise figure to be useful for off the air use in repeater service. I would be leary of any Radio Shack device hooked to an outside antenna, especially around a repeater site where you have frequent lightning currents to deal with. Not sure what you mean by preselectors in front of the Micors. Why do you need them? Are you talking about a duplexer? Micors are generally pretty bullet proof by themselves. You probably will want some sort of pre-selection between the antenna and any preamp. The DCI Bandpass filters work well for this. I have had good luck with the AAR preamps. Others swear by Angle Linear. As far as jumpers from the splitter to the receivers, it probably makes little diference as to what impedence to use. If you are using a TV type splitter then it is probably easier to use a quality 75 ohms cable with the F connectors. Since this is a receive set up and you won't be transmitting through them, you can and should use the 100% shielded coax for the jumpers, the most common being foil shielded. You should be able to use any practical length for them. Please don't use the foil shielded coax for any duplex operations, though. 73, Al, K9SI Date: Thu, 4 Aug 2005 02:06:45 -0500 From: Bruce Nanney [EMAIL PROTECTED] Subject: Re: Re: receiver combining (Was Digest Number 3263) OK Al, I am using 75 ohm split on two Micors with a preselecter on each. Seems to work rather well. I bought a CATV 10 db adjustable gain splitter from Radio Shack several years back and converted it to 12 volt to run on battery back-up, but never had the need to use it till now. Sounds like we're along the same thinking on this. So we take the preselecters off the Micors, put on the RS 4-way splitter, gain set to over come loss. What about jumpers, 75 or 50 ohm ? Does it really matter, and do they need to be 1/4 wave length of the freq. they are hooked to ? Thanks, Bruce KD4BOH. snip Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: Rx Combiner
OK skipp here goes, TX freq. is 442.675. Rx freq. are 447.675, 449.075, 446.775, 449.875. TX antenna is a set of stacked 6 element beams pointed at remote 2 meter TX site. Is 30' side mounted under rx antenna inwhich is on top of tower. Rx antenna is G6-2/70 R. I have Bp filter on 447.675. Tx is @ 40 watts. If I need to put Bp on other receivers I have them. They are synclairs. All radios are Micors. Thanks Bruce. - Original Message - From: skipp025 [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, August 02, 2005 4:37 PM Subject: [Repeater-Builder] Re: Rx Combiner Sure, I'll tell you how right here... just tell me the approx frequencies of your receivers and what you plan to use as your tranmitting antenna (ie how far away it is on the tower). It would also be nice to know what type of receivers you're using. Your turn... skipp skipp025 at yahoo.com www.radiowrench.com brucenanney [EMAIL PROTECTED] wrote: Anybody got a good idea for building a combiner for UHF receivers. Need to put 4 Rx on one antenna. Thanks, Bruce. Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] 1994 MRT Article on SpectraTAC Mods?
In the February 1994 issue of MRT there was an article by Carl Ebinger of the Dade County Radio Shop who made some interesting claims about improving the performace of the SpectraTAC systems used by Dade Co. EMS. His article claimed that he could improve the performance of the SQM by the addition of $0.25 (1994$) in parts to each SQM. He described how there was too much voice getting into the noise detection circuitry which was causing falsing. Unfortunately, when I tried to track the details down [circuit left out of article] I found that Carl was a Silent Key and, thus out of range. Talking to several others in the shop, including Susie and Joe Harper, did not lead me to the schematic of the modification. Carl had been working with TRN6091A SQMs so I am wondering if Motorola incorporated his improvements into later revision SQMs. Before I begin badgering the Dade County Radio Shop again I thought I would ask here if any of you were familiar with the article and Carl's work. He did say that he improved performance by removing JU-6 and installing JU-5 in the secondary line drivers of the three subcomparators. This shortened the Status Tone return delay from 550 msec to 90 msec which improved weak signal noise detector falsing at the master comparator. Thanks, Bruce WA6YLV KMJ335 Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: Motorola Spectra-Tac Voter
Kevin, Did you try the SpectrTAC Yahoo List? You might get a better response there. I personally know at least one fellow locally who has done what you describe and he monitors that list now and then. Bruce WA6YLV KMJ335 --- In Repeater-Builder@yahoogroups.com, Kevin Berlen, K9HX [EMAIL PROTECTED] wrote: I am contemplating putting a Motorola Spectra-Tac voting system on one of the systems I am responsible for. Has anyone else installed one of these in it's native form (constant 2175Hz on the RF links)? I know there is the requirement to ID each link every 10 minutes. Or has someone modified the SQM's to respond to a COR signal rather than the absence of the 2175 Hz tone? I am just in the very early stages at this point, but thought I would do some fact finding work. Thanks for any input and 73, Kevin, K9HX Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] IOTA Switched Power Supply and Noise?
Does anybody have a web site to look at IOTA power supply? I need to find some to replace my power supplies in the future. Bruce KD4BOH.- Original Message - From: Joe Montierth [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Wednesday, May 25, 2005 2:22 PM Subject: Re: [Repeater-Builder] IOTA Switched Power Supply and Noise? I have one of the 75 amp supplies working at a remote site. We have not seen any noise from the unit, but our equipment is all VHF and UHF, haven't checked it down in HF, but at UHF we have seen no problems. We have 20 UHF RX's and 6 VHF and have not seen any degradation. These IOTA's run much cooler than the analog Astron's, and are much smaller. I will probably be changing out all of the Astrons to these in the next few years, as conditions warrant. Joe --- Nick Papadonis [EMAIL PROTECTED] wrote: Hi Folks, I'm considering purchasing a 45A IOTA Switched Power supply to power a UHF Micor and am concerned about switch PS noise. Has anyone tried these supplies with UHF radios? Is noise experienced? Insight greatly appreciated. Thanks. -- Nick KB1GZN Boston, MA __ Do you Yahoo!? Yahoo! Small Business - Try our new Resources site http://smallbusiness.yahoo.com/resources/ Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] GM300 power adjustment limit?
I can tell you what I've came up with on mine and it might help. I have M120's as link transmitters, the boards are basically the same. If I turn my power down below 8 to 10 watts it starts acting up, spurs and changing power out each time you tx out. I keep my power set at 12 to 15 watts and seem to do fine. I mounted it and VHF radius 100 on top of 12 amp Astron. I have 5 of these units running in repeater system. Some of them have ran as long as 8 years with out being touched. When I did have problems it was power supply problems not radio problems. I also put 4 fan blowing across the fins. Hope this helps. Bruce KD4BOH. - Original Message - From: Ken [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, July 12, 2005 9:17 AM Subject: [Repeater-Builder] GM300 power adjustment limit? I have a 40 watt UHF GM300 I would like to tune down to 10 watts? Is this a safe level to set to on the 40 watt units? I heard that if the power level is set too low it will cause spurs? What is the lowest power level I can set the amp to? Thanx for reading. Ken Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] C3I audio delay board
Thanks for the Info, sounds like I need to upgrade. Bruce KD4BOH - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Monday, July 04, 2005 1:50 PM Subject: Re: [Repeater-Builder] C3I audio delay board Hi Bruce, I have a C3I audio connected to a Cat 300dx. As you increase the delay there a hiss that is heard. If you turn the delay off, the hiss is silent. Any Ideas? That audio delay module uses two cascaded Reticon RD5108 bucket-brigade audio delay chips. Bucket-brigade technology has been obsolete for many years,replaced by better schemes. The chips have apoor signal-to-noise ratio, and cascading them (for longerdelay) makes it worse. That's why you hear the hiss. You can't do much about it. Yourboard is a copy that C3I made of the original S-COM Audio Delay Module. Just as well;theS-COM Digital ADM that came later was a much better product. The design of the DADM is now owned by Integrated Control Systems, which also sells the DADM. 73, Bob Bob Schmid, WA9FBO, MemberS-COM, LLCPO Box 1546LaPorte CO 80535-1546970-416-6505 voice970-419-3222 faxwww.scomcontrollers.com YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Water Tower Humidity
Air flow is the key in most of it. I have a 125 watt transmitter at a remote site at the bottom of a water tower. It sets under the tank where it gets water dripping on it in the summer mornings. It is mounted in a home made aluminum box 2'x2'x28 with 3/4 Styrofoam insulation. I put a 4 vent fan in top of the box running all the time. It has vents on 3 sides down low plus the cooling fans on the equipment. No problem with humidity, But the transmitter heatsink temp at close proximity to the final was pushing 125 degrees. So my problem was recirculating warm air inside the cabinet. I cut an 8 whole in the 4th side where I had no vent. I mounted a high volume, high speed, 8 fan and it comes on when the transmitter is keyed. This floods the cabinet with fresh air and drives out the heat. It dropped the temp 15 degrees. I'll just have to watch it in the winter time about being too cool. Hope this helps. Bruce. KD4BOH. - Original Message - From: Mark A. Holman [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, June 19, 2005 8:03 PM Subject: Re: [Repeater-Builder] Water Tower Humidity I was thinking on the order which is solar powered charger supply like say a batch of muffin fans from the computer P/S ? I heard something like that some time back to cool the attic to a house besides free electricity environmentally friendly. as to humidity problem, I would go to a place that sells dehumidifiers ( around $130.00 ) the GE model has a hose attachment @ the bottom of the tank and run a drain tube on the floor to the outside. pvc flex tubing or cheap water pipe at home builders supply would work, or a plain garden hose would work. just some thoughts ... Mark A. Holman AB8RU ARRL Life Member [EMAIL PROTECTED] - Original Message - From: Joe [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, June 19, 2005 7:18 AM Subject: Re: [Repeater-Builder] Water Tower Humidity I am involved in planning a similar installation. The other problem is that the base gets extremely hot in the summertime. I was thinking of connecting a clothes dryer vent hose to one of the unused entry ports that the coax usually gets routed through the wall. (The flexible solid aluminum type, not the cheap stuff). Then, air could be drawn from the outside to cool the cabinet and keep the humid air out. I would control the fan in the cabinet with a thermostat to keep it warm in the wintertime. Joe Chris [EMAIL PROTECTED] wrote: Hi all! I have the opportunity to place a UHF repeater into the base of a water tower which is quite high. Comes with all the bells and whistles and would be an excellent site. However, it is quite humid inside and I'm afraid the repeater will get condensation buildup. Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] New antenna install ? Any tips ??
Hello there. I weather proof two different ways. I use good military type caulk strips then wrap with 33+. This is what I use when I'm not planning on taking the connecter off, such as a hard-line connecter. The second is, when I'm going to be taking a connection apart, I use 3M Scotch 23 rubber splicing tape , 2 wrap then put 33+ on top of it. The 3M adheres to its self and leaves the connecter clean of residue after it taken off. It's to take off too. Just cut each side of the wrapped connecter with a razor knife and peal it like a banana. Scotch makes some good products. I' m not advertising, just proven experience of over 25 years. Thanks, Bruce KD4BOH. - Original Message - From: Chuck Kelsey [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, June 11, 2005 5:33 AM Subject: Re: [Repeater-Builder] New antenna install ? Any tips ?? Glad you mentioned weatherproofing. I should have, since I'm picky about it. Tape --- Scotch 33+ is your best friend. Don't use an off-brand. I buy it by the box. It's never let me down. Chuck WB2EDV - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, June 11, 2005 12:18 AM Subject: Re: [Repeater-Builder] New antenna install ? Any tips ?? Perhaps arrange for a Native American rain dance -- there's something about installations made during rotten weather. Really! Failing that, pay close attention to your jumper connects. I like to dab a wee bit of clear silicone grease on the threads (not pins) as an anti-oxidant. Caution on tightening -- too much wrenching can deform the coupling make 'em prone to leakage. Avoid cheezy tape from the dollar store; pay a little extra for the good stuff. /. k9jac1 wrote: Is there anything we should do to the new antennas before they are installed on the tower ? Paint, Seal, Waterproof, Start on fire .. snip Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re:coax notch
Can the notches be made for 440 with 7/8 heliax? I need to notch out 442.675 from getting into 449.975 and 449.950. Can notches be made to do this? Thanks, Bruce KD4BOH - Original Message - From: Matt Beasant [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, June 12, 2005 5:18 PM Subject: [Repeater-Builder] Re:coax notch I should add that we ended up screening the tops of our coax stubs as the coupling between them was considerable. It made a big difference screening the tops. All we did was get some cardboard tube, cover it in tin foil and bond it to earth. Matt - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, June 12, 2005 7:02 PM Subject: [Repeater-Builder] coax notch sorry here is the link to the site.bob http://www.qsl.net/kf6yb/duplexer.html ___ Get Juno Platinum for as low as $6.95/month! Unlimited Internet Access with 250MB of Email Storage. Visit http://www.juno.com/bestoffer to sign up today! Yahoo! Groups Links ___ How much free photo storage do you get? Store your holiday snaps for FREE with Yahoo! Photos http://uk.photos.yahoo.com Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Time-Out-Timer Length
Eric and who ever is interested, The T.O.T. I have done some reverse engineering on it. There is 120mfd cap. in the bottom of the can. If you increase it to 340mfd, it will lengthen to about 7 minutes. I think this will be enough for what I'm trying to do. I could increase it more , but there is not enough room for a larger cap. Thanks Bruce KD4BOH. - Original Message - From: Eric Lemmon [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Monday, May 30, 2005 7:16 PM Subject: Re: [Repeater-Builder] Time-Out-Timer Length Bruce, What model radio is the TLN1361A used in? I did not find that number listed on MOL. Most rules require a 3 minute maximum transmission unless other controls are available; what drives your need for such a long interval? Just curious... 73, Eric Lemmon WB6FLY brucenanney wrote: Does anyone know how to lengthen a TLN 1361A T.O.T. from Motorola? The one I have is 1 minute, I need it to do 10-15 minutes. Thanks, Bruce KD4BOH. Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Time-Out-Timer Length
Thanks Eric for the reply. It is a VHF 110 watt mobile that was used in medical field. model #173RTN3100B I have converted it to a vhf tx with a uhf rx. It goes out in the county on a water tower. It rx my uhf control station. The 8 channel voter hub rx my remotes from the other county water towers. The hub sends to the control on a split of more than 15 mhz. no duplexers on this system, just one filter. It works great as long as I can keep the audio levels smooth. Anyway, that gives you an idea of what I am doing. So I'm just trying to put a t.o.t. on the tx because it is a 30 minute drive to it if locks up. Thanks Again, Bruce KD4BOH. - Original Message - From: Eric Lemmon [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Monday, May 30, 2005 7:16 PM Subject: Re: [Repeater-Builder] Time-Out-Timer Length Bruce, What model radio is the TLN1361A used in? I did not find that number listed on MOL. Most rules require a 3 minute maximum transmission unless other controls are available; what drives your need for such a long interval? Just curious... 73, Eric Lemmon WB6FLY brucenanney wrote: Does anyone know how to lengthen a TLN 1361A T.O.T. from Motorola? The one I have is 1 minute, I need it to do 10-15 minutes. Thanks, Bruce KD4BOH. Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Repeater Desense
I had an arx270 to slowly burn the cap out @ the feed point of the antenna. They will not handle 100 watts @ feed point on continuous duty. I contacted Cushcraft and they sent me a new cap at no charge. I use it home now, no repeater use. Bruce, KD4BOH. - Original Message - From: Eric Lemmon [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, May 12, 2005 3:41 PM Subject: Re: [Repeater-Builder] Repeater Desense Bob, The most recent instance was with a Cushcraft ARX-270 2m/440 antenna. I watched this antenna being assembled, and I can state that there was no corrosion, maladjustment, or looseness involved. We used that antenna briefly for a 2m repeater simply because it was already in place, and we had a special event to cover. A Motorola RKR-1225 repeater was hooked to it using LDF2-50 Heliax feedline. When the Cushcraft antenna wouldn't work without major desense, I swapped it for a Sinclair SRL-222 dipole, which worked perfectly. 73, Eric Lemmon WB6FLY Bob Dengler wrote: At 5/12/2005 12:37 PM, you wrote: Yes. Many repeater receivers are simply not well enough shielded to keep the TX from leaking into the RX box. Even some commercial repeaters will suffer desense if 100% shielded feedline is not used. I have seen serious desense occur when a dual-band (2m/440) antenna is used on a repeater, due to the uneven gain versus frequency response of many such antennas. A narrowband antenna by itself will not generate desense. Your problem was probably due to corrosion, dielectric breakdown, or some other cause related to poor construction/materials in the amateur grade antenna. I would like to know what model antenna this was though, since I have yet to see any desense problems with my Comet antennas. Bob NO6B Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Micor mobile transmitter
Thanks Eric and Brian for the info. I've been able to run it for 10 yrs @110 watts on 145.270 without any problems in an air conditioned environment. But I'm moving it to a remote location without a/c. I guess I will leave it as is, as I need the power as much as I can get. No duplexer on this machine. Wide area crossband 8 rx site system. Thanks again guys, Bruce KD4BOH. - Original Message - From: Eric Lemmon [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, May 10, 2005 8:26 PM Subject: Re: [Repeater-Builder] Micor mobile transmitter Bruce, Although you can disconnect half of the four final transistors and change the matching components appropriately to have a 50 watt PA, it's better to simply exchange the 100W amplifier board for a lower power board. I'm guessing that you could probably find someone to swap boards with, maybe even make a few bucks in the deal.. It is not a good idea to reduce either the drive level or the PA supply voltage to achieve a lower power output, because the PA can become unstable. A solid-state PA is normally designed to present a stable source impedance which, in basic terms, is directly proportional to supply voltage and inversely proportional to PA current. Reducing the drive level will reduce PA current, thus raising the apparent PA source impedance and causing a mismatch with the load impedance- usually the reactive input impedance of a duplexer. This is not good, and is an invitation to instability. Reducing the supply voltage has the opposite effect on the apparent PA source impedance. If you have the requisite test equipment and time, you may be able to adjust both the drive level and the PA supply voltage to achieve stability at a lower power output level. This is a lot of work, and may be much more work than simply replacing the PA board. 73, Eric Lemmon WB6FLY brucenanney wrote: What is the best way to reduce power on a 100 watt micor mobile for repeater use? I have reduced the voltage in to 12.8 volts and have developed a cooling system on the P.A. deck that has constant air flow over the circuit board as well as the the heatsink. Thanks, Bruce KD4BOH. Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] duplexer pages
Don't know about txrx. but tell me where you found Sinclair, also I have tuned Wacomms the txrx should not be much different. Bruce. KD4BOH. - Original Message - From: John Place [EMAIL PROTECTED] To: Repeater-Builder Repeater-Builder@yahoogroups.com Sent: Saturday, May 07, 2005 10:54 AM Subject: [Repeater-Builder] duplexer pages Was looking at the site and looking down at the duplexer tuning sheets for the different ones, Wacomm, Sinclair, etc., but didn't see anything for tuning the txrx series. Nobody have any? -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.11.6 - Release Date: 5/6/2005 Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] need input on changing Mitrek oscillator crystal
Mike, I thought there was some reference to a signal generated by the oscillator crystal in one receiver getting into the other receiver and causing a problem. I have not been able to find ref to it in a search of the messages. Perhaps it is only a concern if two receivers are operating on the very same frequency as with voting. I understood there was a recommendation for using a high side crystal frequency in one receiver and a low side crystal frequency in the other. Might it have implied that the receivers might pick up the wrong input signal as interference? Hardly any repeaters up here in the boonies are set up to use PL tones. I see only one repeater in Nova Scotia is listed as requiring PL tones. Perhaps our two repeaters should be the second and third! :-) I know were do have some problems at times where one repeaters output signal causes the other to come on. But it only happens once in a while. Just wanting to cover my bases! I appreciate any advice. Bruce - Original Message - From: Mike WA6ILQ [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, November 30, 2004 5:20 AM Subject: Re: [Repeater-Builder] need input on changing Mitrek oscillator crystal At 02:52 PM 11/29/04, you wrote: I have read a few comments in the past about the need for changing the crystal from one side of the operating frequency to the other in a Mitrek. I am not sure I will be wording this properly so please be patient. I will have two repeaters at the same site which are Mitrek conversions. One repeater is on 145.210 MHz (neg. offset) and the other repeater is on 147.240 (pos. offset). At present the 145.210 repeater is not a Mitrek but when I am finished the conversion it will be replaced by the second Mitrek. I would appreciate comments re experiences (ie problems) encountered if both receivers have the same frequency crystal. thanks Bruce, VE1II The standard 136-174Mhz Mitrek configuration uses high side injection, with a 10.7 MHz IF. And remember, the 147.24 repeater will be listening to 147.84, and the 145.21 repeater will be listening to 144.61 - with over 3mhz of RX to RX separation I don't see a problem at all. And if you are referring to the two repeaters being on the same channel simultaneously, well, that's what two different PL tones are for - set up repeater 1 on tone A and repeater 2 on tone B. Or am I not understanding the question? Mike WA6ILQ Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] ap4800 by John Bell
I have a repeater controller Model AP4800 Repeater Controller by John Bell seems to be a 1994 or 1995 vintage. I have part of the manual but several pages are missing and I have searched all over the internet and have been unsucessful of finding a copy of the manual. I also searched previous messages here and can find no posts concerning ap4800. Would anyone have a copy or know where I can get a copy of the manual for this controller. Thank you. Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: ap4800 by John Bell
THANK YOU so much for having that on your website!!! I want to also thank Ray Rosler VE5RAE for emailing me the manual. This is a great resource! --- In Repeater-Builder@yahoogroups.com, Scott Zimmerman [EMAIL PROTECTED] wrote: Bruce, Check out the recent addition to the Repeater-Builder site: http://www.repeater-builder.com/rbtip/othermanufacturers-index.html Enjoy! Scott M. Scott Zimmerman Zimmerman Electronics Amateur Radio Call N3XCC 612 Barnett Road Boswell, PA 15531 - Original Message - From: Bruce Morgan [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, November 13, 2004 11:28 AM Subject: [Repeater-Builder] ap4800 by John Bell I have a repeater controller Model AP4800 Repeater Controller by John Bell seems to be a 1994 or 1995 vintage. I have part of the manual but several pages are missing and I have searched all over the internet and have been unsucessful of finding a copy of the manual. I also searched previous messages here and can find no posts concerning ap4800. Would anyone have a copy or know where I can get a copy of the manual for this controller. Thank you. Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Question on Mitrek conversion
Hi, I do not recall seeing a "commandment" saying that the existing white coax coming from the antenna relay to the receiver and to the transmitter should definitely be replaced with something better. Is it double shielded cable? I realize that in its first life the Mitrek mobiles were not duplex. In my first two conversions I used small hardline to replace the coax entirely, but maybe this is not necessary? Thanks Bruce, ve1ii Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Free Preamp Encloser.
- Original Message - From: Tedd Doda [EMAIL PROTECTED] To: Repeater Repeater-Builder@yahoogroups.com Sent: Wednesday, March 24, 2004 10:24 AM Subject: [Repeater-Builder] Free Preamp Encloser. Hi Guys: Does anyone have any use for a well heatsinked preamp encloser? The active devices are shot, but the box, connectors (SMA) and heatsink may come in handy. Just cleaning out some future projects which never became a reality :) Some pictures: http://www.sentex.ca/tedds_place/preamp-1.jpg http://www.sentex.ca/tedds_place/preamp-2.jpg http://www.sentex.ca/tedds_place/preamp-3.jpg All I ask for is the shipping costs...US$6.00 to anywhere in Canada and the lower 48. Paypal ONLY..I really get tired of the money orders that never show up. Tedd Doda, VE3TJD Lazer Audio and Electronics Baden, Ontario, Canada Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Free Preamp Encloser.
Sorry about that last message from me hit send b4 I typed anything else! :-( Tedd I would be interested in getting that enclosure from you. Please send info re payment directly to me. [EMAIL PROTECTED] Thanks, bruce, ve1ii - Original Message - From: Tedd Doda [EMAIL PROTECTED] To: Repeater Repeater-Builder@yahoogroups.com Sent: Wednesday, March 24, 2004 10:24 AM Subject: [Repeater-Builder] Free Preamp Encloser. Hi Guys: Does anyone have any use for a well heatsinked preamp encloser? The active devices are shot, but the box, connectors (SMA) and heatsink may come in handy. Just cleaning out some future projects which never became a reality :) Some pictures: http://www.sentex.ca/tedds_place/preamp-1.jpg http://www.sentex.ca/tedds_place/preamp-2.jpg http://www.sentex.ca/tedds_place/preamp-3.jpg All I ask for is the shipping costs...US$6.00 to anywhere in Canada and the lower 48. Paypal ONLY..I really get tired of the money orders that never show up. Tedd Doda, VE3TJD Lazer Audio and Electronics Baden, Ontario, Canada Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Manual for VHF Mostar
I'm looking for a manual for a VHF Mostar, the display version is best but the NVR version will work too. I can pay via PayPal, cashiers check. Thanks in advance, Bruce WB6ARE Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[Repeater-Builder] Wanted MIB schematic, Mostar Interface Box
MIBs are almost non-existant these days. Does anyone have a MIB schematic they are willing to share? Thanks in advance, Bruce WB6ARE Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[Repeater-Builder] COS Logic Circuit
I have a question about logic circuits. I have a Yaesu FT 1500 that has the data port on the back and I want to use the 1500 as a temporary receiver in my repeater while the acutal receiver is out for repairs. Here is my problem, the data output port has a COS pin out (Carrier=5 volts, none = 0 volts) My contoller port says, Receive COS (pull this input low when receiving). So I need to turn my positive logic signal to a negative logic signal. I found this circuit to do the the opposite of what I need ( http://www.repeater-builder.com/pix/cosswitch.gif ) Can I and if so how can I modify this to produce the positive logic with no signal and negative logic when a carrier is present. Or is my line of thinking completely out of line?Thank you. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
