"Floyd Sense" <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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I've just finished aligning and checking out my TR7, and note that the
output power I see is less than most folks report. I've been through the
list archives and the eHam reviews, and it appears that there's a great deal
of variability in the outputs reported, particularly on the higher bands.
On CW, I can get 85 watts out on 15, and 75 watts on 12 and 10 meters. This
was measured with a Bird 43 meter and a 50 ohm dummy load.
In the Service Manual, section 3-12, ALC Adjustment, it says you should be
able to set the output to 140-150 watts on 20 meters. I can get around 125
there. I've checked all voltages, including bias on the drivers and
finals - everything looks normal. Since the output is clearly not being
limited by the ALC, I'm wondering where the problem might be. The rig is
drawing around 25 amps from a 13.8V supply, so perhaps the drive level is
adequate and the input power is what it should be.
Any ideas on why the efficiency is so low on the higher bands? Problems with
the low pass filters?
K8AC
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