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

Fri, 29 Mar 2002 15:28:26 -0500

Are you really hearing harmonics (defines as multiples of a fundamental)
or do you mean microphonics (caused by moving tube elements and the
like)?  I suspect that you are misusing a technical term.  Microphonics
occur when you tap things and there is a problem with it.  It acts
almost like a microphone.

Glenn Little
Customer Service
HARK Systems
(V) 843 764-1560
(F) 843 764-3692

-----Original Message-----
From: [email protected] [mailto:[email protected]]
On Behalf Of Scott, Barry (Clyde B)
Sent: Friday, March 29, 2002 3:15 PM
To: [email protected]
Subject: RE: [R-390] (I found the problem) NOT!!

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>
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