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

Fri, 29 Mar 2002 17:03:11 -0500

Ha, your'e right!  The sound from the tapping sounds like when a microphone
is tapped.  Almost like an echo.

Jim

----- Original Message -----
From: "Glenn Little" <[email protected]>
To: "'Scott, Barry (Clyde B)'" <[email protected]>; <[email protected]>
Sent: Friday, March 29, 2002 3:28 PM
Subject: RE: [R-390] (I found the problem) NOT!!

> 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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