[Heathkit] SB104A

Robert P. Ward wardbnj at comcast.net
Sun Jan 23 19:03:59 EST 2005


Hi Group
	I am trying to trace down a problem with low output from the TX IF board.
The only band that is low is 15 meters. The signal levels to the TX mixer
are about the same for all bands.
The input level to Q305 is the same as 20 meter input, however it only
produces 1/2 the output.
This equates to about 70 watts of output at the antenna jack.
The other bands are all 90+ watts output.
The only service bulletin I found for this issue, suggested problems with
the lowpass filter inductors. That does not appear to be the problem here.

	Your thoughts would be appreciated,
			Thanks,
				Bob  NQ3N





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