RE: [Repeater-Builder] When 4, 6 or 8 Cavities just won't do...
The blue sticker has what appears to be 152 or 153 on it, but that could just be the three left cavities. Also, it only shows PASS and REJECT freqs; a real duplexer would have high-pass and low-pass freqs listed. This is another buyer beware item, and it may be why the seller didn't list the freqs in the first place. Bob M. == --- Eric Lemmon [EMAIL PROTECTED] wrote: Gary, It may be that the duplexer was put together for a commercial application that has nothing whatsoever to do with Amateur Radio. The vendor does not specify what frequencies it is tuned to- a very serious omission. 73, Eric Lemmon WB6FLY Be a better Globetrotter. Get better travel answers from someone who knows. Yahoo! Answers - Check it out. http://answers.yahoo.com/dir/?link=listsid=396545469
RE: [Repeater-Builder] When 4, 6 or 8 Cavities just won't do...
The blue sticker has what appears to be 152 or 153 on it, but that could just be the three left cavities. Also, it only shows PASS and REJECT freqs; a real duplexer would have high-pass and low-pass freqs listed. Yes, these cans may have been sold the first time on 152 or 153, that doesn't mean it won't do 145. My commercial duplexer on my VHF repeater was originally ordered and used in the 152 commercial stuff, the sticker says so, but it still tunes and works fine at 147. A real duplexer would have high pass and low pass frequencies listed? What if it were a notch only duplexer? A 'real' duplexer is under no such requirements. 73 N7HQR
[Repeater-Builder] WTB: VHF Micor Mobile Manual
Anyone have an extra manual laying around for VHF mobile micors. Doing a 220 conversion and need a service manual. If so, email me with a price. thanks, Jordan
[Repeater-Builder] Hello all I am a newbie here. I do E-cycling and have alot of rare manuals
Im looking to sell. wanted to know how to go about that. Dont wanna break any rules :) Thanks for letting me join.
Re: [Repeater-Builder] OT: Need to find a product to develop goodwill at a tower site(s)
[EMAIL PROTECTED] wrote: Hello to All, I am starting to develop a future ham repeater relation with a tower site(s) owner and recently got a request for something unusual. The company has a fleet of VHF radio equipped vehicles. They want to pull up to a site, enter a touch-tone sequence on the mike, and open a security gate at the site. I could kludge together something, but would rather find something commercially available. Anytime I have kludged something together, I have ended up having to repair it for longer that I expected. Something with a VHF receiver, TT decode and relay contact output would be great. Any ides if this is even made commercially? I know that some fire/ambulance departments use a similar idea to open and close the firehouse door. Some also have the ability to control traffic control lights on their way to a situation. 73, Joe, k1ike Another vote for a simple garage door opener, but specifically because: you can easily buy radios which use a rolling code. If you used a simple dtmf or plain garage door opener, there would be nothing stopping an intruder from just memorizing the signal. Rolling code allows multiple transmitters, btw. If one were lost, you can deregister it from the receiver and reregister the new one. This is by far the cheapest solution and might be the best. -- 73, Larry, W1HJF rapp at lmr dot com
[Repeater-Builder] Re: Multimeter
I have a Fluke 70 that I realy like. Another good brand to look into is Amprobe. I have a very nice setup from them. It isn't autorangeing but it has a high voltage probe, ac amp clamp and ac leekage detector. I don't rember the model number but I used it on a daliy basis as my bench meter for years and it still works great. Kerry KE5OFO
[Repeater-Builder] Re: Remote Base/Repeater Question From a Newbie
--- In Repeater-Builder@yahoogroups.com, Mike Morris WA6ILQ [EMAIL PROTECTED] wrote: Look for a GM300 as opposed to a Maxtrac. The GMs have a channel steering option that can be enabled in the RSS and by grounding selected pins in the 16-pin jack on the back you can binary select 8 or 9 (I think) channels... using three or four bits in a binary pattern. So take a UHF Maxtrac or GM300 and a high band GM300 and get a few connector parts from DigiKey... Thanks for all this info. Looks like I have some reading to do. If I get a UHF GM300 will I be able to do this with a VHF Maxtrac? I am trying to do this without spending much money on radios since I have a bunch comming for free. Plus It will be kind of cool to finaly get the HT220 back on the air to trip the repeater.
[Repeater-Builder] Old Equipment !
Hi Folks: I am a minister in a small town in southeast Missouri. Iused to mess with Ham radio years ago, was also a licensed broadcaster then. Anyway I would like to get back into it, not only for myself, but also to share with some kids that I work with. Most of them come from broken homes, and just need a little attention. Does anyone in this group have any old equipment that they are not useing, that I may obtain cheaply due to my tight bubget,(oath of poverty),lol. Thank You and God Bless. Jeff Thomas 608 South 4th Street Hayti, Mo. 63851
Re: [Repeater-Builder] OT: Need to find a product to develop goodwill at a tower site(s)
Biggest problem I can see is security. Anyone can receive the frequency and the tones. Simple to program a ham radio to the same freq and tone. Anybody with any radio experience will be able to open the gate(s). Might as well just leave the gates open. --- [EMAIL PROTECTED] wrote: Hello to All, I am starting to develop a future ham repeater relation with a tower site(s) owner and recently got a request for something unusual. The company has a fleet of VHF radio equipped vehicles. They want to pull up to a site, enter a touch-tone sequence on the mike, and open a security gate at the site. I could kludge together something, but would rather find something commercially available. Anytime I have kludged something together, I have ended up having to repair it for longer that I expected. Something with a VHF receiver, TT decode and relay contact output would be great. Any ides if this is even made commercially? I know that some fire/ambulance departments use a similar idea to open and close the firehouse door. Some also have the ability to control traffic control lights on their way to a situation. 73, Joe, k1ike From:John Sichert [EMAIL PROTECTED] To:Repeater-Builder@yahoogroups.com Subject:Re: [Repeater-Builder] IFR COM-120A Manual Date:Thu, 24 May 2007 23:11:28 + - lweter, I know where I can get a COM-120B manual. I am not sure what the difference is. The service manual is $50 + shipping. John At 11:09 AM 5/24/2007, you wrote: I just recently acquired a used IFR 120A but it needs calibration and a manual. Does anyone know where I can obtain some version of the IFR COM-120A oeprations manual for a reasonable price if not free? Yahoo! Groups Links Yahoo! oneSearch: Finally, mobile search that gives answers, not web links. http://mobile.yahoo.com/mobileweb/onesearch?refer=1ONXIC
Re: [Repeater-Builder] GE Programming Software for Amateur Use available online?
The Software for the MVS can be found in the files section of the yahoo group called RadioProgramming2, if you have any trouble locating is just holler and I'll shoot you a copy of it. Dave N0TRQ -- Every electronic device is manufactured with smoke stored deep inside... only a true genius can find a way to set it free. On 5/24/07, Jim [EMAIL PROTECTED] wrote: skipp025 wrote: Is there any of the older GE radio software available online? MVS or MPA radios A ham friend wants to try and use these radios and I have little or no GE Radio Software. For MPA's it matters a bit which logic board they have, and which flash is in them (although that can be changed easy.) The best board is the 19D903081G(n) (called the '081 board), which can be flashed to EDACS/conventional or conventional only, and can accept the AEGIS digital board. This can be programmed with EDACS-4 (windows-based), EDACS-1, (DOS), or MPA CONV with the conventional only flash. Another is the '628 board, which is EDACS/conventional only, and does not accept digital boards. This can only be programmed with EDACS-1 I believe. There is also an older board that is unflashable, and is conventional only, but I don't remember the number right off. And it only programs with MPA CONV. -- Jim Barbour WD8CHL -- -- Every electronic device is manufactured with smoke stored deep inside... only a true genius can find a way to set it free.
[Repeater-Builder] Aluminum Tape
Hi all. N5VAV here. I always see on DB antennas such as the 224, etc. the aluminum tape holding the phasing harness to the mast. I also often see Aluminum tape securing heliax hardline to towers, water tower legs, etc. What I'm wondering is if this is due to electrical/RF considerations, or due simply to durability reasons? I am going to mount an antenna on a water tower and was wondering if I should be sure to secure the phasing harness with new aluminum tape, and secure the 7/8 hardline to the tower leg with the aluminum tape? I have the 2 wide tape, and can use it if needed. Is it needed, recommended, and if so, why? ALSO, there is a DB type VHF 8 bay antenna on the tower currently. It has the bays opposite each other, not the 2 DB224's stacked end-to- end. What is the model of that antenna? ANy information about it, especially gain? 6 or 9 DB? Thanks so much! 73, Jeff - N5VAV
[Repeater-Builder] Micor oscillator mod question
I just modified my micor UHF for the exciter to be on all of the time. I am not for sure that I really like this mod. The oscillator signal seems to carry pretty far. Can someone tell me exactly what is gained by wiring the exciter to be on all of the time. Is it just for faster transmit response time? Thanks I'm sure there will be more questions to come! Jordan, K9NZF
[Repeater-Builder] Linking 2 repeaters
I have two locations that have Moto - Micor 2meter repeaters, am using a FF-800 for a controller at both sites. I have explored the idea of using a UHF repeater and link radio to hotlink the two sites, but at the time funding is a bit low. What other alternatives do I have to link the two repeaters? Thanks for the input.
[Repeater-Builder] Re: OT: Need to find a product to develop goodwill at a tower site(s
I might have a cheaper answer to it all but it depends on what radios exist in the fleet. If they are anything like the Kenwoods, they'll have built in dtmf 2 tone encoders/decoders. I believe some Motorola mobiles have this as well. Program the units to encode either dtmf or 2 tone on a front panel button. I've done this with the Kenwood mobiles port's. If you have Fleetsync or MDC signaling that will work as well...Provided you have the rcvr for it. The key click counter is ok as well. I regularly sell install S-Com's AGI1100's in airports just for pilots to remote dial a phone line other functions using the proper number of ptt's. If you go with the ptt counter, use the Pl/dpl detect or TOR (kenwood) output instead of a carrier det only. This way, you are actually counting the correct PL/DpL hits not a noise or distant co-channel user. If you build a ptt counter, bear in mind that commercial units offer a programmable window of opportunity within which your ptt's must arrive or the system resets. The usual windows are setup for 1 ptt per second for the number of ptts necessary. If any of the ptts arrive outside that window, you have to start over. Other than the rather pricey (for this job) S-Com units, I don't know who else makes such a device commercially. In my applications I require very dependable, bullet-proof units that I can set forget for years. I haven't had an S-Com AGI1100 fail yet after the hundreds installed or the years in service.
RE: [Repeater-Builder] Aluminum Tape
Jeff, On the DB products the metal tape covers the fiberglass tape which would not last very long in full sunlight. The metal tape just protects the tape from degrading. From what I see thee are no electrical or RF considerations involved. I bought some of both tapes to wrap on the antennas I rebuild, it works well and last a longtime. The tape comes from 3M. The 8 bay antenna is probably a DB-304, a very good 6 dB antenna. Check out: http://www.andrew.com/products/antennas/bsa/_instruction/095020-000.pdf Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Jeff Sent: Monday, May 28, 2007 10:02 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Aluminum Tape Hi all. N5VAV here. I always see on DB antennas such as the 224, etc. the aluminum tape holding the phasing harness to the mast. I also often see Aluminum tape securing heliax hardline to towers, water tower legs, etc. What I'm wondering is if this is due to electrical/RF considerations, or due simply to durability reasons? I am going to mount an antenna on a water tower and was wondering if I should be sure to secure the phasing harness with new aluminum tape, and secure the 7/8 hardline to the tower leg with the aluminum tape? I have the 2 wide tape, and can use it if needed. Is it needed, recommended, and if so, why? ALSO, there is a DB type VHF 8 bay antenna on the tower currently. It has the bays opposite each other, not the 2 DB224's stacked end-to- end. What is the model of that antenna? ANy information about it, especially gain? 6 or 9 DB? Thanks so much! 73, Jeff - N5VAV Yahoo! Groups Links No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.472 / Virus Database: 269.8.0/821 - Release Date: 5/27/2007 3:05 PM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.472 / Virus Database: 269.8.0/821 - Release Date: 5/27/2007 3:05 PM Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * 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] Aluminum Tape
I'll nit-pick here. That is a 4-bay antenna. It has 8 elements. Each pair of elements constitutes a bay. Yes, the aluminum tape simply was to keep the filament tape from deteriorating in the weather. Chuck WB2EDV - Original Message - From: Paul Finch [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, May 29, 2007 10:00 AM Subject: RE: [Repeater-Builder] Aluminum Tape Jeff, On the DB products the metal tape covers the fiberglass tape which would not last very long in full sunlight. The metal tape just protects the tape from degrading. From what I see thee are no electrical or RF considerations involved. I bought some of both tapes to wrap on the antennas I rebuild, it works well and last a longtime. The tape comes from 3M. The 8 bay antenna is probably a DB-304, a very good 6 dB antenna. Check out: http://www.andrew.com/products/antennas/bsa/_instruction/095020-000.pdf Paul Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * 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] OT: Need to find a product to develop goodwill at a tower site(s)
One thing that can be done is have a receiver with the PL tone used to open the gate located at the office. Any time that tone is received, the office would know that someone was accessing the site. If it were not authorized, law enforcement could be dispatched to the site. A controller interfaced to the radio at the office, such as the Zetron 38A, with a relay that can be controlled by a particular tone could alert the office that an access was in progress. Also a log of the access would be kept in the Zetron and could be read out at any time. 73 - Jim W5ZIT -Original Message- From: Paul M Schmitter [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sat, 26 May 2007 8:20 pm Subject: Re: [Repeater-Builder] OT: Need to find a product to develop goodwill at a tower site(s) Biggest problem I can see is security. Anyone can receive the frequency and the tones. Simple to program a ham radio to the same freq and tone. Anybody with any radio experience will be able to open the gate(s). Might as well just leave the gates open. --- [EMAIL PROTECTED] wrote: Hello to All, I am starting to develop a future ham repeater relation with a tower site(s) owner and recently got a request for something unusual. The company has a fleet of VHF radio equipped vehicles. They want to pull up to a site, enter a touch-tone sequence on the mike, and open a security gate at the site. I could kludge together something, but would rather find something commercially available. Anytime I have kludged something together, I have ended up having to repair it for longer that I expected. Something with a VHF receiver, TT decode and relay contact output would be great. Any ides if this is even made commercially? I know that some fire/ambulance departments use a similar idea to open and close the firehouse door. Some also have the ability to control traffic control lights on their way to a situation. 73, Joe, k1ike From: John Sichert [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] IFR COM-120A Manual Date: Thu, 24 May 2007 23:11:28 + - lweter, I know where I can get a COM-120B manual. I am not sure what the difference is. The service manual is $50 + shipping. John At 11:09 AM 5/24/2007, you wrote: I just recently acquired a used IFR 120A but it needs calibration and a manual. Does anyone know where I can obtain some version of the IFR COM-120A oeprations manual for a reasonable price if not free? Yahoo! Groups Links Check Out the new free AIM(R) Mail -- 2 GB of storage and industry-leading spam and email virus protection.
[Repeater-Builder] Re: Linking 2 repeaters
How about a VHF receiver at each site that listens to the other repeater? Obvioulsy, you'll need excellent antenna separation to do this, plus the ability to eliminate CTCSS from being transmitted on hang time and during ID's. Otherwise, you'll wind up getting caught in a loop. Also, the two sites must be able to hear each other. --- In Repeater-Builder@yahoogroups.com, prostockcocker [EMAIL PROTECTED] wrote: I have two locations that have Moto - Micor 2meter repeaters, am using a FF-800 for a controller at both sites. I have explored the idea of using a UHF repeater and link radio to hotlink the two sites, but at the time funding is a bit low. What other alternatives do I have to link the two repeaters? Thanks for the input.
[Repeater-Builder] Motorola GM300 Problem
After reprogramming a GM300, the unit doesn't receive. The new receive frequency is NOT out of band. Transmit works just fine. Suggestions for possible quick fixes?
Re: [Repeater-Builder] Motorola GM300 Problem
Please elaborate on doesn't receive. Can you still open the squelch using the MON button? Does the unit hear anything when the squelch is open? What's the model number stamped on the RF board? What's the receive frequency? Quick fix: get another radio. Bob M. == --- Tony L. [EMAIL PROTECTED] wrote: After reprogramming a GM300, the unit doesn't receive. The new receive frequency is NOT out of band. Transmit works just fine. Suggestions for possible quick fixes? Choose the right car based on your needs. Check out Yahoo! Autos new Car Finder tool. http://autos.yahoo.com/carfinder/
Re: [Repeater-Builder] GE Programming Software for Amateur Use available online?
Dave, I wasn't able to google 'radioprogramming2' with any success. Could you send a copy of the MVS software to [EMAIL PROTECTED] Thanks, Jack - N7OO - Original Message - From: Dave Cochran To: Repeater-Builder@yahoogroups.com Sent: Friday, May 25, 2007 7:28 AM Subject: Re: [Repeater-Builder] GE Programming Software for Amateur Use available online? The Software for the MVS can be found in the files section of the yahoo group called RadioProgramming2, if you have any trouble locating is just holler and I'll shoot you a copy of it. Dave N0TRQ -- Every electronic device is manufactured with smoke stored deep inside... only a true genius can find a way to set it free. On 5/24/07, Jim [EMAIL PROTECTED] wrote: skipp025 wrote: Is there any of the older GE radio software available online? MVS or MPA radios A ham friend wants to try and use these radios and I have little or no GE Radio Software. For MPA's it matters a bit which logic board they have, and which flash is in them (although that can be changed easy.) The best board is the 19D903081G(n) (called the '081 board), which can be flashed to EDACS/conventional or conventional only, and can accept the AEGIS digital board. This can be programmed with EDACS-4 (windows-based), EDACS-1, (DOS), or MPA CONV with the conventional only flash. Another is the '628 board, which is EDACS/conventional only, and does not accept digital boards. This can only be programmed with EDACS-1 I believe. There is also an older board that is unflashable, and is conventional only, but I don't remember the number right off. And it only programs with MPA CONV. -- Jim Barbour WD8CHL -- -- Every electronic device is manufactured with smoke stored deep inside... only a true genius can find a way to set it free. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.472 / Virus Database: 269.8.1/822 - Release Date: 5/28/2007 11:40 AM
[Repeater-Builder] Re: When 4, 6 or 8 Cavities just won't due...
My fingers thank you for the description Jeff... I wasn't looking forward to typing all that information out. Jeff DePolo [EMAIL PROTECTED] wrote: It started out as a stock six-cavity notch duplexer (I have one of these in storage - I think it's a DB-4021?). Let me explain that part (the stock duplexer) first. Before I get into it, realize that some notch cavities are asymmetrical in terms of the notch response - they have somewhat of a high-pass *or* low-pass characteristic to them. That is, the insertion loss above the notch frequency may be a few dB more than it is below the notch. To start with, the three cavities on the right are one side of the duplexer, and the three in the middle are the other side. Easy enough. The three cavities on the right have traditional tees right on the loops. The three in the middle have the cavities stood off what would normally be a tee using a length of coax. In other words, instead of the tee along the length of the harness being attached directly to the cavity loop, there is a short piece of coax between the tee and the cavity loop. By standing the cavity off by a length of cable (typically 1/4 wave), the high-pass or low-pass characteristic of the cavity is flipped. So, if we assume the right three cavities were high-pass, the middle three would be low pass using this technique. Now, to get back to the stubs. They are added right at the cavity tee to provide additional notch depth and enhance the high-pass/low-pass response. Depending on the length of the cable, they can look like either L or C in parallel with the loop. So, that explains the duplexer. That leaves the three cavities on the left. Those are just more notch cavities, again with the stubs to enhance the response. HOWEVER, like Bob, what bothers me is that these three extra cavities are configured without the standoff coax between the tee and the cavity, thereby making them the same pass-response configuration as the RIGHT three cavities, whereas they should be configured the same as the MIDDLE three cavities. Not sure what to make of that...my guess would be that it doesn't work right... --- Jeff On Behalf Of Bob M. It would seem like the middle and right columns were originally a simple duplexer, then they added the left column to that. If you can trust the labeling, the bottom left is the TX input and the top right is the RX input. The middle and left columns have shorted loop stubs attached to each cavity. These are stuffed down between the cavities and you can see the shorted ends on a couple. The right column doesn't have these stubs. The signal path seems to go from the bottom middle column, up to the top middle, then over to the top left and down to the bottom left. The blue sticker shown seems to be for the 152-153 MHz range, although that could have been for just the left column's cavities. It only shows one pass freq and one reject freq; a duplexer would have a high-pass and a low-pass; this looks more like a specially designed filter than a real duplexer, although there are labels on the top middle and top right cavities indicating RX and TX respectively. It's strange that the left and middle columns are configured differently, with short pieces of coax between the TEE fittings and the cavities in the middle column that are not present on the left column. Bob M. == --- skipp025 [EMAIL PROTECTED] wrote: Re: When 4, 6 or 8 Cavities just won't due... Another Ebay gem: DB PRODUCTS 9-CAVITY RADIO REPEATER DUPLEXER-100DB-HAM Ebay Item number: 250120910164 I don't know to be impressed or just laugh at all the hardware (number of cavities used). cheers, skipp
[Repeater-Builder] ptt click counter circuit
rtc_0001 [EMAIL PROTECTED] wrote: If you build a ptt counter, bear in mind that commercial units offer a programmable window of opportunity within which your ptt's must arrive or the system resets. The usual windows are setup for 1 ptt per second for the number of ptts necessary. If any of the ptts arrive outside that window, you have to start over. Other than the rather pricey (for this job) S-Com units, I don't know who else makes such a device commercially. The Hamtronics dtmf decoder board (with latching logic) has an auto patch (telephone) valid dtmf password sequencer circuit that is pretty much the circuit we're talking about. A string of cmos flip flops and a simple rc timer do the job real well. Instead of valid dtmf digits... you simply use the ctcss or cos logic as the valid data input. One of the advantages of kit building... good circuits can be adapted to other projects/tasks. cheers, skipp
[Repeater-Builder] Re: Linking 2 repeaters
Low cost surplus uhf radios make nice half duplex linking possible. Even a 2 to 4 watt portable on a pair of point-to-point yagi antenna system works pretty darn well. s. prostockcocker [EMAIL PROTECTED] wrote: I have two locations that have Moto - Micor 2meter repeaters, am using a FF-800 for a controller at both sites. I have explored the idea of using a UHF repeater and link radio to hotlink the two sites, but at the time funding is a bit low. What other alternatives do I have to link the two repeaters? Thanks for the input.
Re: [Repeater-Builder] Re: Linking 2 repeaters
Yep, I used to use a 1-watt Motorola MX-350 HT as a link to a repeater that was 65 miles distant. This was back in the days where you had to roll your own linking interface. Chuck WB2EDV - Original Message - From: skipp025 [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, May 29, 2007 2:02 PM Subject: [Repeater-Builder] Re: Linking 2 repeaters Low cost surplus uhf radios make nice half duplex linking possible. Even a 2 to 4 watt portable on a pair of point-to-point yagi antenna system works pretty darn well. s. prostockcocker [EMAIL PROTECTED] wrote: I have two locations that have Moto - Micor 2meter repeaters, am using a FF-800 for a controller at both sites. I have explored the idea of using a UHF repeater and link radio to hotlink the two sites, but at the time funding is a bit low. What other alternatives do I have to link the two repeaters? Thanks for the input. Yahoo! Groups Links
Re: [Repeater-Builder] Micor oscillator mod question
twoway_tech wrote: I just modified my micor UHF for the exciter to be on all of the time. I am not for sure that I really like this mod. The oscillator signal seems to carry pretty far. Can someone tell me exactly what is gained by wiring the exciter to be on all of the time. Is it just for faster transmit response time? Thanks I'm sure there will be more questions to come! Station? We use the (unused) antenna switch logic (on the SCM) to control the channel element ground. Works great, less filling... Kevin
Re: [Repeater-Builder] Old Equipment !
On Mon, 28 May 2007, Jeff Thomas wrote: I am a minister in a small town in southeast Missouri. Iused to mess with Ham radio years ago, was also a licensed broadcaster then. Anyway I would like to get back into it, not only for myself, but also to share with some kids that I work with. Most of them come from broken homes, and just need a little attention. Does anyone in this group have any old equipment that they are not useing, that I may obtain cheaply due to my tight bubget,(oath of poverty),lol. Thank You and God Bless. Someone ship this guy 200 mitreks. :-p -- Kris Kirby, KE4AHR [EMAIL PROTECTED] The illegal we do immediately. The unconstitutional takes a bit longer. -- Henry Kissinger
Re: [Repeater-Builder] Interference and t-1504 questions
On May 24, 2007, at 8:40 AM, TGundo 2003 wrote: I tuned up the extra can I have as best I could with the probes I have, figuring something is better than nothing). I could get abour 30dB of isolation through it with about 1db of loss on my RX freq. I put it in-line after the rx cans on the duplexer and it seemed to have stopped the interference (at least fot the 15 minutes I listened afterwards). We'll see if this does the trick. I would like to install an Advanced Receiver Reasearch preamp I have sitting waiting for it, but I need to get this interference resolved first. Still quiet after a few days, Tom? Just curious how it worked out. -- Nate Duehr, WY0X
[Repeater-Builder] VHF Engineering BLD 10/120 220mhz amp info? (Blue Line)
I know that I've asked about this before, but have not really found anything. I have a VHF Engineering BLD 10/120 220mhz amp that was given to me. I'd sure like to find some docs/schematics., etc. This was one of their Blue Line amps, factory built. It has a blue anodized heat sink. It consists of a 2N6084 driving a pair of MRF245's. I was hoping to get this thing working, and then re-mount it on an old VHF continuous duty repeater amp heatsink. If the description jogs anyones memory that they may have docs, I'd sure like to get my hands on them! Thanks, Dave NA6DF
[Repeater-Builder] Combined/Coupled Repeaters/Transmitters
If you have worked with multicoupled recieve antennas and combined transmit antennas, or a community antenna-type site, please drop me a line off list. I have a few questions regarding your experiences with implementation versus theory. -- Kris Kirby, KE4AHR [EMAIL PROTECTED] The illegal we do immediately. The unconstitutional takes a bit longer. -- Henry Kissinger
[Repeater-Builder] CSI -32 info for the group (SOT)
Many months ago I asked the group about a back door method for the CSI-32 multi-tone controller panelto enter the progamming mode, as I had a friend with a CSI-32 in which the access code was reprogammed and the new code had been lost or forgotten. I recieved several replies from the group but nothing seemed to work. Fortunately we were able to pull the chip out of one I had, read and copy copy it and insert it into my friends unit to get it working again. Below is copy of a procedure that I recently forwarded to another friend with a CSI-32 who had a similar prolem, this will work with out copying someone elses chip, (The info below should be edited and posted in the CSI section of the RB site for future reference.) This may also work on the CSI-32 super and CSI-32Plus as well. The link below will take you to the Repeater Builder Website and the .PDF file for the CSI- 32 Controller Manual. If you don't have a copy of the manual, print out a complete copy for yourself first. Then carefully read paragraph 5.10 on resetting the Programming Access Code. The Default setting is35687. It states that you can only change the last 2 digits of the code, however you can also use the A,B and D characters from the 4th row of the DTMF pad in the modified the access code string. If you can't enter the program mode using the Default No. 35687 then enter 35600 thru 35699 (100 combinations) or 356 A/B/D 0 thru 9 (30 combinations) or 356 0 thru 9A/B/D (30 combinations). There are 160 total combinations. You must wait 5 seconds between entering these combinations. After you finally locate the correct combination to unlock the Controller and place it into the programming mode write that number down on a peice of paper, and/or reprogram the access code back to the Default No.35687 so you don't have to go thru the whole process again if you lose or forget the code. Hope this helps someone else out there who has a CSI controller collecting dust because they can't reprogram it. 73 Doug N3DAB http://www.repeater-builder.com/other-mfrs/csi-32.pdf
Re: [Repeater-Builder] Combined/Coupled Repeaters/Transmitters
At 5/29/2007 04:56 PM, you wrote: If you have worked with multicoupled recieve antennas and combined transmit antennas, or a community antenna-type site, please drop me a line off list. I have a few questions regarding your experiences with implementation versus theory. My last system had: 445 MHz TX 422 MHz TX 439 MHz RX 440 MHz RX 2 meter repeater all running simultaneously on one antenna. What would you like to know? Bob NO6B
Re: [Repeater-Builder] Linking 2 repeaters
Two tin cans and lots of string:) --- prostockcocker [EMAIL PROTECTED] wrote: I have two locations that have Moto - Micor 2meter repeaters, am using a FF-800 for a controller at both sites. I have explored the idea of using a UHF repeater and link radio to hotlink the two sites, but at the time funding is a bit low. What other alternatives do I have to link the two repeaters? Thanks for the input. __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
RE: [Repeater-Builder] Micor oscillator mod question
Jordan, Assuming your Micor station has a unified chassis, was it always a repeater, or was it converted to repeater use from a base station? Repeater stations have a great deal of extra filtering in the interconnect boards that connect the RX and TX shelves to the backplane. The repeater chassis also is equipped with extra shield plates that cover the RX and TX shelves, which plates should be secured with all screws in place. The purpose of the extra filtering and shielding is to prevent (or greatly attenuate) any direct radiation from the exciter oscillator or the RX injection oscillator. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of twoway_tech Sent: Monday, May 28, 2007 9:15 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Micor oscillator mod question I just modified my micor UHF for the exciter to be on all of the time. I am not for sure that I really like this mod. The oscillator signal seems to carry pretty far. Can someone tell me exactly what is gained by wiring the exciter to be on all of the time. Is it just for faster transmit response time? Thanks I'm sure there will be more questions to come! Jordan, K9NZF
Re: [Repeater-Builder] Re: Linking 2 repeaters
On that note, I still have some Johnson PPL6060's that would be ideal for the job... e-mail me off-list if you are interested. George, KA3HSW / WQGJ413 - Original Message - From: skipp025 [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, May 29, 2007 1:02 PM Subject: [Repeater-Builder] Re: Linking 2 repeaters Low cost surplus uhf radios make nice half duplex linking possible. Even a 2 to 4 watt portable on a pair of point-to-point yagi antenna system works pretty darn well. s. prostockcocker [EMAIL PROTECTED] wrote: I have two locations that have Moto - Micor 2meter repeaters, am using a FF-800 for a controller at both sites. I have explored the idea of using a UHF repeater and link radio to hotlink the two sites, but at the time funding is a bit low. What other alternatives do I have to link the two repeaters? Thanks for the input.
Re: [Repeater-Builder] Motorola GM300 Problem
As someone else asked - define doesn't receive. Dumb quretion, maybe, but did it receive BEFORE the reprogramming? Any audio rush when you push and hold the mon button? If no, check jumper on 16 pin accy connector. Did you reprogram for an odd or different PL or DPL? Chas, KS3Z --- Tony L. [EMAIL PROTECTED] wrote: After reprogramming a GM300, the unit doesn't receive. The new receive frequency is NOT out of band. Transmit works just fine. Suggestions for possible quick fixes? Yahoo! Groups Links (Yahoo! ID required) mailto:[EMAIL PROTECTED] Looking for a deal? Find great prices on flights and hotels with Yahoo! FareChase. http://farechase.yahoo.com/
Re: [Repeater-Builder] CSI -32 info for the group (SOT)
I had a problem similar to yours in gaining access to some older Zetron 38A controllers. I found that the RAM where the access code was stored was battery backed up using a Dallas Semiconductor battery back up chip. I found that I could remove the RAM chip from the battery back up chip and the access code would reset to factory default. After a few minutes, plugging the RAM chip back in resulted in a reset to the original factory access code, and factory parameters. From there is was follow the manual to set them up to the parameters I wanted. 73 - Jim W5ZIT -Original Message- From: n3dab To: Repeater-Builder@yahoogroups.com Sent: Tue, 29 May 2007 5:00 pm Subject: [Repeater-Builder] CSI -32 info for the group (SOT) Many months ago I asked the group about a back door method for the CSI-32 multi-tone controller panelto enter the progamming mode, as I had a friend with a CSI-32 in which the access code was reprogammed and the new code had been lost or forgotten. I recieved several replies from the group but nothing seemed to work. Fortunately we were able to pull the chip out of one I had, read and copy copy it and insert it into my friends unit to get it working again. Below is copy of a procedure that I recently forwarded to another friend with a CSI-32 who had a similar prolem, this will work with out copying someone elses chip, (The info below should be edited and posted in the CSI section of the RB site for future reference.) This may also work on the CSI-32 super and CSI-32Plus as well. The link below will take you to the Repeater Builder Website and the .PDF file for the CSI- 32 Controller Manual. If you don't have a copy of the manual, print out a complete copy for yourself first. Then carefully read paragraph 5.10 on resetting the Programming Access Code. The Default setting is35687. It states that you can only change the last 2 digits of the code, however you can also use the A,B and D characters from the 4th row of the DTMF pad in the modified the access code string. If you can't enter the program mode using the Default No. 35687 then enter 35600 thru 35699 (100 combinations) or 356 A/B/D 0 thru 9 (30 combinations) or 356 0 thru 9A/B/D (30 combinations). There are 160 total combinations. You must wait 5 seconds between entering these combinations. After you finally locate the correct combination to unlock the Controller and place it into the programming mode write that number down on a peice of paper, and/or reprogram the access code back to the Default No.35687 so you don't have to go thru the whole process again if you lose or forget the code. Hope this helps someone else out there who has a CSI controller collecting dust because they can't reprogram it. 73 Doug N3DAB http://www.repeater-builder.com/other-mfrs/csi-32.pdf Check Out the new free AIM(R) Mail -- 2 GB of storage and industry-leading spam and email virus protection.
[Repeater-Builder] Re: OT: Need to find a product to develop goodwill at a tower site(s)
In a related vein, have a 'presence sensor' on the circuit, AND'ed with the appropriate PL/DTMF/whatever decode That way, there has to be a vehicle close to the gate - ultrasonic sensor at a post, a magnetic sensor in the ground/pavement, whatever. Would increase the security, and especially decrease the liability; I'd hate to see the gate moving unexpectedly, while someone else is going thru it or working on the mechanism, just because some hacker tried sending the tone sequence, or another employee, unwittingly. Chuk kb4mdz --- In Repeater-Builder@yahoogroups.com, Milt [EMAIL PROTECTED] wrote: Here's an easy idea that is currently in use. A police department wanted a way to open a garage door from the cruiser, other than calling the station and having them push a button. Solution was to take an old radio (Maxtrac in thsis case) laying around, install it into a metal box, bring out the PL/DPL decode indication to drive a relay and install at the site. No antenna on the radio, receive only. Programmed for an odd DPL on a low usage channel owned by the PD. Cars have a channel marked DOOR. Cop pulls up to the door, switches to the DOOR channel and keys the mic. Door goes up. Nice quiet and painless. Something that any competent shp can easily accomplish. Milt N3LTQ - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, May 26, 2007 4:03 PM Subject: [Repeater-Builder] OT: Need to find a product to develop goodwill at a tower site(s) Hello to All, I am starting to develop a future ham repeater relation with a tower site(s) owner and recently got a request for something unusual. The company has a fleet of VHF radio equipped vehicles. They want to pull up to a site, enter a touch-tone sequence on the mike, and open a security gate at the site. I could kludge together something, but would rather find something commercially available. Anytime I have kludged something together, I have ended up having to repair it for longer that I expected. Something with a VHF receiver, TT decode and relay contact output would be great. Any ides if this is even made commercially? I know that some fire/ambulance departments use a similar idea to open and close the firehouse door. Some also have the ability to control traffic control lights on their way to a situation. 73, Joe, k1ike Yahoo! Groups Links
Re: [Repeater-Builder] Re: OT: Need to find a product to develop goodwill at a tower site(s)
At 04:19 PM 05/26/07, you wrote: One other thought... If they don't already have dtmf mics on their radio gear then I would not consider adding them for cost and reliability reasons. I'd probably buy some of the low cost key-chain remote control units and the master decoder receiver. It's probably easier to buy a $10 to $25 key-chain remote vs. having to place new dtmf mics on radios. skipp And one more bonus - if someone loses the key-chain remote or if someone gets fired and keeps theirs it can be dropped from the master a lot easier than reprogramming a DTMF decoder and informing everyone of the new code. There's always someone that doesn't get the message... And one comment on using a garage door opener... as I remember the starting message to this thread, it's a tower site company. This means high altitude... and the garage door opener receiver will be able to see a lot of residential area... what;s to say that some consumer down in the valley won't have the same RF frequency and digital code on their opener? There are openers that have a rolling code feature, but I don't know if those units can handle multiple remotes controlling a receiver at each of multiple sites. And all of the above assumes that the garage door opener receiver even survives at a tower site that has lots of RF in the air... (and I'm not kidding - I've seen a Genie brand receiver in a metal box with SuperFlex going to a pass cavity with 3db loops... with a 6db pad on the cavity output... and a RG-8-sized feedline to a coathanger-style ground plane. I was not able to get close enough to the feedline to read the cable type). If you do go with DTMF mics on all the mobiles (are they in place now?) and an appropriate decoder on a commercial receiver on the talkaround channel I'd suggest a deliberately poor antenna. Maybe a 6 or 10db pad between the RF connector and a stubby duck. Just to keep the riff-raff out of the system. No sense in allowing someone thirty miles away who has a beam antenna and a DC-to-Daylight programmable radio be able to open the gate. But I still question broadcasting a DTMF sequence over an open radio channel. Anybody can listen, anybody can decode, anybody can duplicate the signal. If I remember the original message there are power gate openers... a good quality key switch accessible from the vehicle door would seem to scratch their itch. Sometimes low tech is more secure. Use a Medeco or Abloy if you need key blank control. If not, just pin the key switch to an existing key on the company vehicle keyring. I know of one site where the padlock on the gate is a Schlage, and the keycode is the same as the shop vehicle driveway gate. Another trick... pick a community repeater frequency at the site... put the insensitive commercial radio on that input. Program the receiver for a DPL code that no existing user currently has. Have the DPL decoder drive a relay to open the gate. Or if the DTMF mics already exist have the DPL decoder enable the DTMF decoder. Mike WA6ILQ
Re: [Repeater-Builder] Re: D-Star demo
At 5/28/2007 12:27, you wrote: Also, as you pointed out, D-Star digital voice is a narrowband signal occupying only about 6Khz vs. the 25Khz or so that amateur repeaters have often required to date. It is difficult to do a comparison between a While the typical 50 dB analog NBFM (5 kHz deviation) bandwidth is ~20 kHz, the 50 dB bandwidth of DStar appears to be about 10 kHz. Here in SoCal we're proposing 10 kHz channel spacing for DStar, digital P25 any other very narrow band digital voice, or VNBDV, systems. Bob NO6B
