Paul,
First of all, my condolences!
The easiest way to approach it is to look at the schematic and find
which devices connect to 12 volts, and suspect any or all of them until
they have proved themselves OK. The initial list is D19, Q7, Q6, U9 and
U5 (plus any components associated with these active devices). You may
have to resort to removing them one at a time to discover which one
failed and then try to figure out which passive components that device
took out after it shorted.
73,
Don W3FPR
Paul Webb wrote:
> Was just off to work and decided to take my K1 with me for a a play a lunch time, picked up a antenna i had been playing with and just connected it to the k1 in the shack with the antenna thrown around the room, but i was powering the K1 from a varable bench supply at the time, put it in tune mode and the k1 started to tune, i then noticed that the bench supply was reading around 17v DC (must be rf getting into it as it was 12.5v before) and current limiting at around 1.5 Amps.
> before i could do anything the K1 went off and a smell of burning from it could be detected.
> now the K1 reads a direct short when you apply power , got to run to work now but any ideas where to start looking when i get home would be a great help.
> regards
> Paul M0BMN
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