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<DIV>Good news for this evening: </DIV>
<DIV> </DIV>
<DIV>The repair on the TS-450S seems to have gone well, and the unit is now up
and working on all ham bands. Receive sounds really good, and have not had
a single unlock episode. I had one conversation with a friend in B'ham and
he said the audio sounded very good. </DIV>
<DIV> </DIV>
<DIV>I could force the unlock signal in the display by tuning the capacitor
that was replaced (that is as expected), and the synthesizer tuning voltage
is now exactly what the service manual says it should be. It was *much*
less when the unit was intermittent. Seems solid now. </DIV>
<DIV> </DIV>
<DIV>The technical stuff: The problem was a physically broken variable
capacitor buried deep down inside the radio. This capacitor determined the
center frequency for the voltage-controlled-oscillator that is part of one of
three frequency synthesizers in the radio. How such a small part (less
than 1/4" on a side) so deeply within the radio would have gotten broken is
a puzzle to me. Anyhow, I had a similar one in the 'junk box' that was a
good enough physical and footprint fit. Should be fine for many, many more
years. </DIV>
<DIV> </DIV>
<DIV>Into a 50 ohm dummy load with a Drake W-4 wattmeter, I was able to get the
following power outputs:</DIV>
<DIV> </DIV>
<DIV>160 105 watts</DIV>
<DIV> </DIV>
<DIV>80 115 watts</DIV>
<DIV> </DIV>
<DIV>40 118 watts</DIV>
<DIV> </DIV>
<DIV>30 115 watts</DIV>
<DIV> </DIV>
<DIV>20 115 watts</DIV>
<DIV> </DIV>
<DIV>17 105 watts</DIV>
<DIV> </DIV>
<DIV>12 110 watts</DIV>
<DIV> </DIV>
<DIV>28 110 watts</DIV>
<DIV> </DIV>
<DIV>29.7 105 watts</DIV>
<DIV> </DIV>
<DIV>Looks good to go, so I'll probably bring it back to the station in
Broun on Thursday prior to the meeting. I hope everyone will get a
chance to use the unit since it will be back on line.</DIV>
<DIV> </DIV>
<DIV>73</DIV>
<DIV> </DIV>
<DIV>John...</DIV>
<DIV>WB4LNM</DIV>
<DIV> </DIV>
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