It was just on the thread a month ago. nematime $15 donation. I have used it and it worked well.
On Sun, Dec 11, 2011 at 5:25 PM, J. Forster <[email protected]> wrote: > I think I've seen IRIG Time Code SW for the PC that uses a sound card, but > I forget where. The various IRIG formats are well dovumented. > > And yes, Time Code readers were used with high and low speed searches on > IRIG tape recorders. You set Start and Stop points and the tape would > Play, Stop, Reverse, Stop, Play as you demuxed/analyzed the data. > > Typically there were 5 or 12 tracks of analog data and two time code > tracks. Sometimes digit was recorded in roughly the same way. > > -John > > ================ > > > > > Fascinating. I also have one of these with slight differences, but it > > does have a Fort Meade tag. Bought it from a guy on the BoatAnchors > > list in Atlanta in the dim past. > > > > The HTID number is H9823180065821, NSN 664500DISPLAY, User ID STWA104 > > > > The rotary switch adds a 160 KHz position. The two switches are marked > > CODE POLARITY and POWER ON. The rear panel has a 4 pin circular jack > > labeled AUX and a 24 pin rectangular connector marked PARALLEL. > > > > A partly torn tag taped to the top says Made by TRAK, Model ?? 2234/U, > > SN 517. A plastic envelope contained a DD Form 1348-1A release/receipt > > document from the Defense Reutilization Marketing Office at Meade. It > > released 5 of these units worth $1500 each, dated 1-29-98, ship from > > H98231 (in HTID number above) to SX1213 (marketing office?). > > > > Somewhere I'd heard that these units were for locating times on tape > > recordings of intercepts. The different filter frequencies are for > > different tape speeds, from high speed search to fine positioning. > > The code might be IRIG but it could just as easily be something the > > NSA invented for the purpose. > > > > I bought it because I'd visited the NSA museum at Fort Meade and seen > > the code breaking machines. I didn't find them intimidating at all. > > The gift shop would sell me a jacket with NSA logos, but I didn't > > know where I would wear it. There is a certain cachet to having a > > box that was used by top secret agents to decode radio intercepts. > > > > Bill Hawkins > > > > P.S. I'd recommend doing some signal tracing from the Input connector. > > We have no idea what signal levels were used, if it wasn't IRIG. I > > never found time to do that. > > > > > > -----Original Message----- > > From: ed breya > > Sent: Sunday, December 11, 2011 2:12 PM > > > > I looked at your first post again and noticed there were apparently > > lots of TTL circuitry, so it could be an IRIG code receiver, and you > > should be able talk to it. If you don't have a source readily > > available, you may be able to fool it into responding a little to > > gibberish applied from a modulated signal generator, just to see if > > it's functional. > > > > Ed > > > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > > > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
