[Drake] Re: Interesting Problem

[Andrew Siska]

I would like to thank everyone on the list that responded to my original
post below.  My problem turned out to be a dirty contact on the
transmitter's crystal selection switch.  All seems fine now!

73,
Andy / N9CU

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I've been using a R-4A and T-4XC from my collection of Drake gear over the
past several weeks.  All has been well until a few days ago.

While operating using the transmitter as the controlling device in
transceive mode,  I noticed my output power dropping as I was operating.
Within a few seconds, the output drops to 0.  If I switch to separate mode,
or use the receiver as the controlling device in transceive mode, I obtain
full output again.  If I switch back to using the transmitter, the output
disappears.  The problem is intermittent.  It doesn't happen every time I
use this set, nor does it happen at a particular time after power-up.

I operate CW and haven't bothered to see if the problem appears in other
modes.  I don't think the mode is related to the problem.

Since switching to spot or receiver transceive seems to cure the problem, I
am assuming the problem is in the injection circuits.

Any ideas before I take the cover off?


73
Andy / N9CU