The only problem that I can remember with interfacing the SpectraTac receiver to the SNV-12 voter was the status tone. The SpectraTac sent out a 1600 pilot tone and the voter was expecting something else. I don't remember quite how we fixed that.
Joe
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On 11/17/2022 7:38 PM, RFI-EMI-GUY wrote: Sounds pretty bullet proof. You can't knock those old Micor receivers.
On Thu, Nov 17, 2022 at 06:10 PM, Joe wrote:
I helped to build a few JPS SNV-12 voter systems years ago.? We used
Motorola Spectra TAC Receivers (narrow banded, Comm Spec filters, don't
ask not my decision) and it worked well.? It took a little fooling
around with timing but we got it to sound quite good.
Joe
On 11/17/2022 5:26 PM, RFI-EMI-GUY wrote:
With all this talk about mods to old GE and Motorola Voters, it
would
be simpler to buy last generation JPS SNV-12 voters as they
surplus out.
--
The Real RFI-EMI-GUY
--
The Real RFI-EMI-GUY
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Sounds pretty bullet proof. You can't knock those old Micor receivers.
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Show quoted text
On Thu, Nov 17, 2022 at 06:10 PM, Joe wrote:
I helped to build a few JPS SNV-12 voter systems years ago.? We used
Motorola Spectra TAC Receivers (narrow banded, Comm Spec filters, don't
ask not my decision) and it worked well.? It took a little fooling
around with timing but we got it to sound quite good.
Joe
On 11/17/2022 5:26 PM, RFI-EMI-GUY wrote:
With all this talk about mods to old GE and Motorola Voters, it would
be simpler to buy last generation JPS SNV-12 voters as they surplus out.
--
The Real RFI-EMI-GUY
? -- The Real RFI-EMI-GUY
|
Definitely an interesting device. Would be helpful if schematic service manuals were on line.? It got to be a bidding war so I backed out when it looked like it might well exceed the price of a new Argent Data Systems ADS SR-1. Was hoping to get it though.
To the buyer who is probably reading this. I would advise "forming the capacitors" when powering 1980's NOS equipment for first time. I let out the smoke on something NOS from 1980's recently because it had an (underrated) input filter cap that was not happy at the arrival of fresh 2022 electrons. Connect a 9V transistor battery for a while...
--
The Real RFI-EMI-GUY
|
I helped to build a few JPS SNV-12 voter systems years ago.? We used Motorola Spectra TAC Receivers (narrow banded, Comm Spec filters, don't ask not my decision) and it worked well.? It took a little fooling around with timing but we got it to sound quite good.
Joe
toggle quoted message
Show quoted text
On 11/17/2022 5:26 PM, RFI-EMI-GUY wrote: With all this talk about mods to old GE and Motorola Voters, it would be simpler to buy last generation JPS SNV-12 voters as they surplus out.
--
The Real RFI-EMI-GUY
|
With all this talk about mods to old GE and Motorola Voters, it would be simpler to buy last generation JPS SNV-12 voters as they surplus out.
--
The Real RFI-EMI-GUY
|
Does your version resolve the simulcast clock timing issues of the current RTCM? If so that is a plus. Also makes it suitable for commercial applications.
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On Thu, Nov 17, 2022 at 12:00 AM, DCFluX wrote:
I have to sit down and figure out the per unit price, but I probably won't be able to compete with the price point once labor is factored in.
Any idea on the price, Matt? The current price of the RTCM is expensive for several sites, even with $100 off for the ham price.. like most hams I try to be cheap ?
?
Chris WB5ITT?
On Wed, Nov 16, 2022, 2:52 PM DCFluX < dcflux@...> wrote:
Yes.
?
It's like a cross between the original voter board and the RTCM. But really I wanted a better layout to the original voter.
?
The board can use an internal GPS and has provisions to run the microcontroller off of it if you have a dual output unit board like the UBlox RCB-F9T.
?
External GPS is RS-232 and TTL capable jumper selectable.?
?
Added COS input and PL encode output control, but will need software modifications to implement.
?
On Wed, Nov 16, 2022, 12:34 RFI-EMI-GUY < rhyolite@...> wrote: DCFluX
Is this a new RTCM? Details please??
On Wed, Nov 16, 2022 at 11:37 AM, DCFluX wrote:
Radio Thick Client Module just dropped.
?
--
The Real RFI-EMI-GUY
?
?
?On Thu, Nov 17, 2022 at 12:00 AM, DCFluX wrote:
I have to sit down and figure out the per unit price, but I probably won't be able to compete with the price point once labor is factored in.
Any idea on the price, Matt? The current price of the RTCM is expensive for several sites, even with $100 off for the ham price.. like most hams I try to be cheap ?
?
Chris WB5ITT?
On Wed, Nov 16, 2022, 2:52 PM DCFluX < dcflux@...> wrote:
Yes.
?
It's like a cross between the original voter board and the RTCM. But really I wanted a better layout to the original voter.
?
The board can use an internal GPS and has provisions to run the microcontroller off of it if you have a dual output unit board like the UBlox RCB-F9T.
?
External GPS is RS-232 and TTL capable jumper selectable.?
?
Added COS input and PL encode output control, but will need software modifications to implement.
?
On Wed, Nov 16, 2022, 12:34 RFI-EMI-GUY < rhyolite@...> wrote: DCFluX
Is this a new RTCM? Details please??
On Wed, Nov 16, 2022 at 11:37 AM, DCFluX wrote:
Radio Thick Client Module just dropped.
?
--
The Real RFI-EMI-GUY
?
?
? -- The Real RFI-EMI-GUY
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|
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Is the LDG voter system still in production or has it been discontinued?
Thanks!
Steven H
N8RLW
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Re: Multiple repeaters sharing a common power supply - pros and cons
Hello Don and group,
Call the Avon, Ohio store on the phone and ask for Vince.
1 440 934 5268
Its model Batt1 ?
They had a few that were used and I looked again at the one I bought and it was used one for the price I stated before. ? If I showed you the one I have and a brand new one you would not see the difference. It was that clean when I got it.? They went through it for me to make sure everything was okay so I feel very confident getting a used one from them again. ?? A new one is 500.00 and even I think at that price it well worth the cost considering a dual band mobile radio is 300 to 400. ?? Time you get all of the other items round up and paid for to make a self charging system it will be that cost. ? I had even looked into the West Mount radio system and it only goes to 40 amps draw so that was a no go with me. ? ?
I'll post a picture here later when I'm at the site again doing some wire clean up.
Steven H
N8RLW
Mount Vernon, Ohio
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Re: Multiple repeaters sharing a common power supply - pros and cons
Steve, ? I¡¯m interested in the power distribution panel.? I went onto Vasu¡¯s web site but couldn¡¯t find any information on it.? Can you post a link to it or give me any additional information?? Thanks. ? Don KD9PT ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of steven harvey
Sent: Thursday, November 17, 2022 12:54 PM
To: [email protected]
Subject: Re: [repeater-builder] Multiple repeaters sharing a common power supply - pros and cons ? [Edited Message Follows] I just went through our repeater here in Mount Vernon, Ohio.??? A communications company call Vasu communications here in Ohio makes a very nice power distribution panel I got one for about 175.00 with tax. Its individually fused and has high amp terminals attached to it too.? ?
I replaced our home made items with this setup not only to clean up the cabinet but to allow easier troubleshooting and it allowed me indivially fuse everything using automotive style fuses. ? It also allowed us to use pass through battery terminals from inside the cabinet to the outside where the batteries are hooked up.? Need to replace a battery just unhook and go.? ?
Gives you the ability to have two power supply's online at the same time and also provides battery back up charging and flip over if needed.??? Right now have to RM-60's in cabinet with a combined ability to give 100amps of draw.??? So if you lose one power supply then your down to 50 amps.?? Best part is they have the ability on the battery side to charge and disconnect when the voltage gets to low all without needing to use commands from controller.?? Plus this allowed me to hot swap power supplies too.
I normally don't recommend products, but this one for the price could not be passed up and only takes 2U.? ? If you can afford another power supply it is better to be able to swap it out while everything is online.
Just my two cents on the subject.
Steven H
N8RLW
Mount Vernon, Ohio
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Re: Multiple repeaters sharing a common power supply - pros and cons
I just went through our repeater here in Mount Vernon, Ohio.??? A communications company call Vasu communications here in Ohio makes a very nice power distribution panel I got one for about 175.00 with tax. Its individually fused and has high amp terminals attached to it too.? ?
I replaced our home made items with this setup not only to clean up the cabinet but to allow easier troubleshooting and it allowed me indivially fuse everything using automotive style fuses. ? It also allowed us to use pass through battery terminals from inside the cabinet to the outside where the batteries are hooked up.? Need to replace a battery just unhook and go.? ?
Gives you the ability to have two power supply's online at the same time and also provides battery back up charging and flip over if needed.??? Right now have to RM-60's in cabinet with a combined ability to give 100amps of draw.??? So if you lose one power supply then your down to 50 amps.?? Best part is they have the ability on the battery side to charge and disconnect when the voltage gets to low all without needing to use commands from controller.?? Plus this allowed me to hot swap power supplies too.
I normally don't recommend products, but this one for the price could not be passed up and only takes 2U.? ? If you can afford another power supply it is better to be able to swap it out while everything is online.
Just my two cents on the subject.
Steven H
N8RLW
Mount Vernon, Ohio
|
Everybody keeps talking about mods to the GE voter. E&M signalling is
standard on them, even the old grey ones. So voter tone isn't needed if
you have a relay closure or other good switching. Mods are still required to use a GE voter without status tone if you want to do it right. For starters, you'll want to get rid of the 1950 notch filters on the receiver cards and the audio module to clean up the audio response. Disabling the 1950 detector is also a good idea to prevent voice falsing, as well as disabling the channel failure detection. And you'll want to configure for no AGC. The stock E&M input (active LOW) input requires 12 to 17 volts on the newer black/SMD cards (wider range on the old cards), so not directly compatible with TTL or the logic from many radios/receivers. So, yeah, at the basic level the functionality is there to use E&M instead of status tone, but some additional work, level translation, and other details still need to be addressed - it's not "COR-ready" per se. --- Jeff WN3A -- This email has been checked for viruses by Avast antivirus software. www.avast.com
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Re: Two UHF repeaters sharing the same antenna.
The Motorola sites engineer came up with the solution using only a
BP duplexer on each repeater along with a dual stage isolator.
A 3rd duplexer was not needed.
Jim W7RY
On 11/17/2022 10:01 AM, J Donovan via
groups.io wrote:
The is a diagram using motorola T1500 duplexers for this exact
case, and you can try searching for it. Basically it takes 3 sets
of 1500's each repeater has a duplexer that is then fed into a
third set of T1500 cans to get the separation.
--
Thanks and 73, Jim W7RY
|
Could've fooled me, as I don't see a single surface mount component.
Thank you.
|
Re: Multiple repeaters sharing a common power supply - pros and cons
Yes, Mr. Donovan, that's a scenario that happens after the grid power is restored; the "charger" try's bring the station battery back up. The solution is to either beef up the breaker and supply or limit the charging current until the voltage potential is not so great to blow such breaker.? The Astron's have current limiting, like the RS-50 rack mount would be a good choice, unless you are running high power RF PA on the stations, then you may need the 70-amp version.? What is the breaker size you are on now that blows (ok trips) ?
Good deal Bob with the team players. I like that kind of project :)??? The local Club, here we upgraded the DC backup for our nodes and each group had their job to do, then came together. Too bad I got COVID from someone in the process but live and learn.
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
|
Re: GE MSTR 2 special (Factory Repeater?) FREE
Nearly all of the VHF Sensicon "A" Receivers I ran across back in the 1970's were the ones that had five pipes in the front end. We did have one Receiver in a base station at our college that had six pipes - I think that was the only one of those that I've ever seen. The ones with five pipes still worked excellent for Repeaters using a 600-kHz split. I remember we always needed to add something like 2.2 pf capacitors across each pipe, to get them to tune to 146-MHz frequencies. Even after adding capacitance, sometimes the covers wouldn't go back on the pipes, since the tuning rods stuck out the top of the pipes.
?
I'm dating myself,?here...
?
Larry, K7LJ
?
?
-----Original Message----- From: < [email protected]> Sent: Nov 16, 2022 5:59 PM To: < [email protected]> Subject: Re: [repeater-builder] GE MSTR 2 special (Factory Repeater?) FREE
?
Actually, Frank is there any old Moto stuff that you would like to have?? I finally tossed my 5-pipe sensicon receiver that I used for the repeater in 1974 ! -- - Regards, Karl Shoemaker To contact me, please visit SRG's web site at? for the current email address.
?
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Re: GE MSTR 2 special (Factory Repeater?) FREE
I have a couple of the Motorola factory MT-300 Repeaters. I have one of them that I was able to get the correct low-VHF split modules for, from an MX-340 hand-held radio, replacing the high-VHF split modules that were originally installed in it.? I had the channel elements re-crystalled on a 2-Meter channel by International Crystals, when they were still in business. It tuned up properly on 2-Meters since all of the modules were being used in their original frequency ranges, and worked quite well.?
?
Fortunately, these MT-300 Repeaters came with one of the companion 4-cavity, small TX-RX Duplexers, and the manual. I sent the manual to Eric, WB6FLY (SK) who scanned them and uploaded them to the Repeater-Builder website, which are in the Motorola files area.
?
I picked up these MT-300 Repeaters and the Duplexer at the Spokane Hamfest, some years ago!
?
Larry, K7LJ
?
?
-----Original Message----- From: < [email protected]> Sent: Nov 16, 2022 5:57 PM To: < [email protected]> Subject: Re: [repeater-builder] GE MSTR 2 special (Factory Repeater?) FREE
?
Sure, Frank, it might be fun to play with as I have not seeing this model.? Please run over to the web site and send me your email or number. There's enough amateurs going to Spokane that could bring it. Or I can met half way........... Remember the Motorola version for off-grid sites, using a pair of MX portable radios?? I've build several clones. -- - Regards, Karl Shoemaker To contact me, please visit SRG's web site at? for the current email address.
?
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Re: GE MSTR 2 special (Factory Repeater?) FREE
And it's power supply !!? What is this world coming to???? Being wideband, and I mean very, it was just collecting dust in the leanto. But yea that's how I got started. on .81. You remember our repeater on Bud's tower ? K Jim W7RY
WHAT? Its GONE!!! Jim W7RY
On 11/16/2022 7:59 PM, Karl Shoemaker wrote:
Actually, Frank is there any old Moto stuff that you would like to have?? I finally tossed my 5-pipe sensicon receiver that I used for the repeater in 1974 !
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
--
Thanks and 73, Jim W7RY
-- - Regards, Karl Shoemaker To contact me, please visit SRG's web site at? for the current email address.
|
With the modifications they should.
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
|
Just so every knows it doesn't work on narrow band, At least according to the manual.
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RFI-EMI-GUY
Chris Boone WB5ITT
Karl Shoemaker