International crystal manufacturing
Now that's been several years since they closed their doors anyone heard if the "files" were kept?? My dream (yea, I know) is some of the ex employees got together to start up a new company that compensates channel elements.??? While I'm pipe dreaming, it would be a plus if it was in the USA.
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Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
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Lots of SMDs on the (OEM) board so you may need a wave machine or lots of pacience, LOL.? But ye,s it would be nice to start it up again. Same goes for the Doug Hall voter.
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Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
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You are correct, Jim.??? I still should get my hands on a GE shelf (with the cards, ot course) and dig into it. I'm a documenation guy so I might even do a paper on it.
--
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Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
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On 11/17/2022 1:13 PM, Jeff DePolo WN3A wrote: 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
Ok, killing the 1950 notch is a good idea, but to me that's a separate issue. I've never run across voice falsing on them though, plus I would not worry about disabling channel fail. It doens't affect E&M directly, unless someone decides to dump a continuous tone, probably also squelch noise. That will fail any channel involved. As to voltage levels, well, it all depends on what you're using to key it. I was successful with some old HT90's as link rx's, but the GE MPA's I'm using right now are too low, and I think inverse, so I found some little relay drivers laying around that did the deed. But it works perfectly, no changes to the voter or the cards at all. Could there be a difference in terminology here? To me, making mods to something like this means actually changing parts, or board traces, or something like that. Eliminating the notch filter would be a mod. Adding a relay driver to either the link rx's or the back of the voter, or a separate box, whatever, to me isn't a mod, it's part of the interfacing.
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1600Hz for a SpectraTAC? That's definitely an SP thing. They have the option to jumper for 1950 or 2175Hz, but 1600 sounds like some SP thing. Maybe for older RCA voters?
I'm pretty sure I've still got a rack-mount DHE 4RV/2 comparator that I don't care to own anymore. I've no clue if it works or not. I've never even powered it up. Looks pretty nice though, 19" rackmount card cage with the modules plugged into that, all factory. I should see if I've still got it and list it for sale here.
Chris
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Chris Baldwin, CETSr. (KF6AJM)
Trustee - MetroNET Cal. Intertie (KB3PX)
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With as inexpensive as it is to get PC boards made, perhaps you could ask him for the appropriate PCB files and have your own made.
Chris
--
Chris Baldwin, CETSr. (KF6AJM)
Trustee - MetroNET Cal. Intertie (KB3PX)
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Joe it might be easy to disable those tones.? For the SpecTac receivers I have on the 20 repeater they work very well with the SNV-12.?
Someone posted to purchase the older used ones.? Anyone have a name or source? The factory did not say anything to me about that.
--
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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
Larry, I even kept a box of tubes for stuff like that. Years ago Ray Kresick ran a "tube bank". I have not idea what happened to it.
--
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Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
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Re: Multiple repeaters sharing a common power supply - pros and cons
I'd like to see the schematic drawing or a least a block diagram of you folk's design as I'm open to new ideas and ways to do it. What a Team :)
--
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Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
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I have a DB4060WOC-B VHF and a Telewave UHF BPBR duplexer for sale.
PM at this email or wb5itt at if interested.?
Chris WB5ITT?
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New, never installed, local club bought it 10 years ago, and project never got off the ground. no box, but new, from the factory. Includes the rack mount enclosure, DR-1000 DVR, DL-1000C audio delay board and Ver 2.0 programming software CD. when last sold was well over 1000.00. Sell for 525.00 shipped to US zip code, paypal ok,?
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What modes for narrowband I have one new in box I would like to use.
Unfortunately the builder stopped making them when he ran out of circuit boards. I did try and buy some more in 2011, and that was the responce I got.
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Re: Multiple repeaters sharing a common power supply - pros and cons
Karl I guess you missed that the RS50 fried, quite badly and no amount fusing would prevent being blown. The county now has commercial surge protection on the mains,
When I was still working, another engineer who had worked for ATT Cellular along with Harris helped us design our new stations and power requirements when we went narrowband. This is the formula I stay with it's tried and true and we have 100 of these setups accross 750 sq miles of territory. Strictly batteries being floated (12 and 24v supply) and connecting all power supplies together individualy fused. I will try to dig up a picture of one of the larger sites.
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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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Show quoted text
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.
toggle quoted message
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
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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...
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The Real RFI-EMI-GUY
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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
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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
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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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Show quoted text
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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Karl Shoemaker
Chris Baldwin
Chris Boone WB5ITT
RFI-EMI-GUY