[Motorola] L43-GGV Oscillator Tube Fails

[Paul Signorelli]

My old Motorola L43-GGV Base Station  just had another failure, 6 - 2018.
 The F1 crystal oscillator tube, 6CE5/6BC5 (Motorola tube) in the receiver (G-Strip,  Unichannel) developed a shorted filament. They usually they open up. This is an unusual crystal oscillator tube (most are 12AT7's).
The radio has been in intermittent service on 146.52 for 30 years.
It was working on the bench (horizontal) for a week. I turned it off, picked it up and carefully moved
it 6 feet to another horizontal surface and the tube failed.
It was at Ice Station Zebra which is unheated so it gets a lot of wide range temperature cycling.
Temperature cycling eventually wrecks everything.

Paul   w0rw
 Colorado