[R-390] (I found the problem) NOT!!

[Scott, Barry (Clyde B)]

Y'know, if you can get a recording of that harmonic testing, perhaps Jeff can include it on the next CD.  "Music To Work On Your Boatanchor By".

Barry(III) - N4BUQ

<snip>
>
> A new observation is that with careful peaking of the putt, putt, I can
> almost stop the putt, putt on a PUTT.  At this point, I hear harmonics.
> Tapping anywhere on the chassis will produce stronger harmonics.  Tapping
on
> the 6DC6 will produce very strong harmonics.

It's not out of the question that you have a bad batch of 6DC6's, but more
likely that there's another broken connection.  Systematically tap around
mentally plotting where the harmonic is loudest -- start near the base of
that tube and work outward.  It may get louder somewhere else.
>
> I replaced the 6DC6 with two other tested tubes, with no improvement.
<snip>