![]() ![]() ![]() I had no problems with TX - >100 W output on all bands (or so I thought), modulation and keying was OK, but the widely know fault of frequency drift and wobble by bad trimmer capacitor(s) in series with reference (and other) crystals on the LOCAL PCB board (upper) called for the trimmer caps to be replaced (TC06, TC04, TC05, TC01). After this you can test how the receiver and transmitter works. The usual things to do first, are cleaning the radio, replacing the blown dial lamps, treating all the switches, potentiometers and connectors with contact cleaner (CRC 2-26) - twisting&clicking them a lot to remove oxidation and then applying protective contact grease (Electrolube 2GX). During the first day I noted 3 serious faults, which were eventually resolved. Repairing the older version of Yaesu FT-757GX (so called mk 1, with rotary mode-switch) involves "some" work but, since the 757 is a good match with 736R, I bought a 20-year old FT-757GX.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |