On 12/28/21 4:42 PM, Mike Loewen via vcf-midatlantic wrote:
Mine was a Livermore Data Systems model 71B 300-baud acoustic coupler. Man did I run up some phone bills with that. I still have it.
Mine was a 300 baud Novation J-Cat in 1983, connected to my TRS-80 Model III. Direct connect, and I wrote a simple BASIC program to dial out by pulsing the hook relay.
Wow, nice, I remember those from ads.
Dave, I have a Livermore 76B:
http://q7.neurotica.com/Oldtech/Modems/Livermore.html
From a 1979 issue of Datamation:
LIVERMORE DATA SYSTEMS76B Bell 103/113A-compatible originate-only type Up to 450 bps using FSK modulation Asynchronous, half/full-duplex operation Acoustic with RS232B/C interface Features alternate voice-data Over 4,000 sold since 1975 $300
Nice! My 71B is very nearly identical to that, except the left switch on the rear has three positions, instead of two. I don't recall what the other position is offhand. In mine, the two lamps on the front were those cylindrical aluminum incandescent cartridge bulbs, both of which were burnt out. I couldn't get replacements at the time (I was ~13) so I replaced both of the bulbs and their sockets with LEDs, padded with some hot glue around them. -Dave -- Dave McGuire, AK4HZ New Kensington, PA