I probably should have thought about it a little more before I sent the last message. It’s outputting a loop current it sounds like and not audio to be converted.
Don’t mind me while I go to the back of the room. Hi hi.
Daniel
On Jan 24, 2023, at 17:37, Daniel Jones <[email protected]> wrote:
Could it be SITOR by chance?
Daniel
On Jan 24, 2023, at 17:08, Jeff G <[email protected]> wrote:
Unfortunately the VOLPE board can't make heads or tails of it either, no matter what baud or mode I use. Either the baud rate is wrong or I dunno what. In 45 baud mode, it prints gibberish similar but not identical to what the machine prints. I may have to take it back out to the garage and fire up the logic analyzer lol. Then I can also check to see the ASCII/BAUDOT pin on the MM rom to see what mode its actually using.
Jeff
______________________________________________________________On Tue, Jan 24, 2023 at 4:56 PM <[email protected]> wrote:
5815 maps to Federal Supply Classification (FSC) 5815 = Teletype and Facsimile Equipment.Google hasn't made any sense out of the other numbers yet.
WayneWB4OGM
-----Original Message-----
From: Jeffrey Golas <[email protected]>
To: Greenkeys <[email protected]>
Sent: Tue, Jan 24, 2023 7:40 am
Subject: [GreenKeys] Navy Teletype Message Generator
Thought you guys and gals might find this interesting...I volunteer on Battleship NJ and found this tucked away. Appears to be Navy-like but mentions "project" on it, serial #3 lol. Other than WMS on the board theres no manufacturer.
Its a RTTY/Teletype message generator that does the "quick brown fox" message. Whats really interesting is that all that is based on ONE chip whose sole purpose is exactly that. A MM5220DF. Other chips in that series have similar purposes, like ASCII-BAUDOT conversion.
Theres what looks like a white CPU, but Icant find any docs on it. It almost looks like something they had a surplus of, and with no rom, possibly wired it as a NOP (no-operation) so that it would just be an 8 bit counter. I think anyway.
It does seen to work after cleaning all the switches, I plan to test on the loop. All it does is keying via a solid state relay. I tried piping my signal gen through it but Fldigi couldnt decode.
Jeff KC3GJX
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