[Collins] F9OE and F2FO are looking for a schematic for a 718U-5 ?

Sun, 01 Jun 2003 21:43:38 -0500

718 is the family that replaced the 618 family. Definitely avionics, HF
SSB. I don't have a schematic. Had some data on MARS gear and as I
recall, it used SUHL logic in flat packs in the synthesizer and control
circuits. Early TTL. I think that was a 718T, probably earlier than the
718U. KD6B did get a unit on the air for a bit before logic died. He may
still have manuals or information. The MARS gear came in a pressurized
case with special connections that were classified which made it hard to
find information on. mailto:[email protected]

73, Jerry, K0CQ, Technical Advisor to the CRA.
-- 
Entire content copyright Dr. Gerald N. Johnson, electrical engineer.
Reproduction by permission only.