Maratrac with voice inversion

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radiocat37
Posts: 210
Joined: Mon Sep 22, 2003 9:59 am

Maratrac with voice inversion

Post by radiocat37 »

I recently obtained a VHF maratrac (T73XTA7TA7BK) A9 and it has a switch on the control head that says: clear/coded. I fired it up and it sounds like voice inversion. It has a small board with the numbers: 45807-L9059 on the chip. It also has many wires attached from the chip throughout the logic board. I am just trying to identify this board and what type of scrambling it is. Just prior to the voice inversion starting, I also hear what sounds like MDC on the audio. Any help appreciated. :o

Mike
AF4AY :D
Brian Griffin: Ah, if my memory serves me, this is the physics department.
Chris Griffin: That would explain all the gravity.
.

Lois: Peter, you're drunk again.
Peter: No, I'm just exhausted because I've been up all night drinking.
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radiocat37
Posts: 210
Joined: Mon Sep 22, 2003 9:59 am

correction.....

Post by radiocat37 »

When I said A9 head, I meant A7 advanced head. I had spectra on the brain... :-? Just clarifying... :o

Mike
Brian Griffin: Ah, if my memory serves me, this is the physics department.
Chris Griffin: That would explain all the gravity.
.

Lois: Peter, you're drunk again.
Peter: No, I'm just exhausted because I've been up all night drinking.
Top
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mancow
Batboard $upporter
Posts: 2374
Joined: Sun Sep 09, 2001 4:00 pm

Post by mancow »

Sounds like a Transcrypt board. They use GE STAR (I think) for signalling the code to be used at the start of each transmission. Does it produce a periodic clicking sound as well?
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radiocat37
Posts: 210
Joined: Mon Sep 22, 2003 9:59 am

I think I found it

Post by radiocat37 »

I found a picture of what it is:

ANI-F
Multi-Format ANI Encoder

The ANI-F encodes ANI and Emergency ANI in Motorola's MDC-1200® & MDC-600®, DTMF, five-tone, two-tone, burst tone, or M/A-COM's GE-Star™.

Any threads on this or info..... :o

Mike :D
Brian Griffin: Ah, if my memory serves me, this is the physics department.
Chris Griffin: That would explain all the gravity.
.

Lois: Peter, you're drunk again.
Peter: No, I'm just exhausted because I've been up all night drinking.
Top
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