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Old May 6th 09, 05:48 PM posted to rec.radio.amateur.equipment
Fred McKenzie Fred McKenzie is offline
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First recorded activity by RadioBanter: Jul 2006
Posts: 317
Default TS-450S output reduced

In article ,
rahulkapoor wrote:

3. Shack temp had become very hot last few days. Day temp in shade is
40 degrees C plus.


Rahul-

Unless you ran it key-down for an extended period in CW or FM mode, it
is unlikely that your ambient temperature caused a transistor to fail.
Power transistors normally operate somewhat higher than 40 degrees C.

Lack of any ALC reading is most likely the result of low power. The
cause of low power could be a bad transistor, but is more likely a leaky
or shorted capacitor loading down the voltage supply to an RF stage, or
a voltage-dropping resistor that has gone high in value.

Another problem you might look into, is a connector on the rear panel,
where a transverter would normally be connected. Some Kenwoods have a
closed-circuit switch built into the connector, and sometimes the switch
contacts get oxidized from lack of exercise. There would have been a
mating connector in an accessory packet that came with the radio. If
you still have it, try plugging it in several times. The wiping action
of the switch should clean up any oxide coating.

73, Fred K4DII