QMX+ Died on the Operating Table?
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I started having problems with my QMX+ ver 1 after the SSB calibration.? I ended up replacing the BS170s in the final amp which got me back to full power.? However, I noticed that the power was not reducing in SWR test mode like it should.? I determined that the power modulation transistor Q507 had probably failed.
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I replaced Q507 with a new transistor, but the QMX+ did not survive the operation.? I am now unable to get the QMX+ to power up.? I suspect that I damaged the board when I removed the old transistor and now have a short to ground on the board under the transistor.
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Is there hope of bringing this QMX+ back to life, or is it time for a new main board?
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Steve KA0SM
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