This is basic troubleshooting. You're probably making the same mistake that
I do -- you're looking for some fancy systemic problem, when the _real_
problem is probably something basic like two bad contacts on the bandswitch
or a bent piece of metal or something. I'm an engineer, and the most
embarrasing times are when I've been chasing after gremlins in my design for
days, only to have a technician find an assembly problem - nothing ruins a
good design like a garden variety circuit fault.

Assuming that it's _not_ parasitics, what changes when you change bands?
Maybe it's the bandswitch, or networks that only get switched in for one
band each?

Here's some other thoughts:

It's a Heathkit -- Did it _ever_ work on 10 and 40? Are all the solder
joints good? Are all the right components in place? I'm colorblind, so my
first Heathkit had a gray wire with 160V on it wired in place of a green one
with 5V -- are all the wires in the right places? Does the 10m switch
position go to the 10m tap on the coil, and 40m to 40?

After that -- maybe the previous owner only ran it on 20m and the bandswitch
corroded on the other positions? Maybe the previous owner was a thug who
only used it on 40 and 10 into a 2m antenna and toasted it with high SWR?

"LJ" wrote in message
m...
No Spam (ckh) wrote in message
news:ifgU75G3LLdo-pn2-fsI6Eom2wLsY@localhost...
On Wed, 10 Dec 2003 18:37:25 UTC, (LJ)
-- snip --

Yes, axactly. But why is it doing it on bands like 40 and 10 Meters, but
not on 20?

Very strange...