The ARRL Contest Update for April 28, 2010
Last week the Alpha was put on the operating desk and a 45 min contact on SSB worked fine so we hooked it up for QSK CW and got ready for the CW Contest. It worked perfect for 125 or so contacts running QSK with the MK-V we turned it off to sleep and when we woke up the amp did not come back on line! We are now working on it some more.
The manual says to check;
T/R input relay
All of this seemed to be ok be we did find a lot of dirt in the blower so we tried to get it apart to check everything.
Right now my guess is the Filiments are not coming on!
The 'black pin' on the Molex connector is the Filament winding from the transformer.
The Blower come away from the motor with two screews on the inside of the blower fan. Washed it in the wifes kitchen sink. The gunk was 1/8" to 1/4" all inside so the airflow should be improved.