I'm working on yet another Valiant I. This one has the Johnson SSB
adaptor wiring modification kit installed (if that is an issue?). All
appears to be well, RF out, etc. but I have a question regarding one of
the meter readings. In the oscillator position (6CL6 buffer cath.
current), I get a continuous 10ma reading, key up (idle current, if you
will). Key down, I get an expected swing upward, the keyer circuit
appears to work OK, and the unit transmits with nothing untoward
happening. On the other two Valiants I have, there is no measurable
current in the osc. meter position, key up. I've checked virtually all
components in/around the buffer and keyer circuits with no problems
detected. The only issue is that the derived grid bias on the buffer is
-3v vice the -5v called for in the book. That may be the reason the
buffer is idling at a higher current... but why? What is not provided
by Johnson is a re-drawn schematic after the somewhat extensive re-wire
job for the SSB adaptor. I could just ignore the issue as the 6CL6 is
still well within its operating range. Maybe someone else has had this
come up and/or its normal after the mod has been done? The mod book
makes no mention.
Thanks for any insights. de K3HVG