Microphonic Tube??

[Ron]

> Actually, it's pretty easy to find a microphonic tube.
>
> Advance the volume control to a point just before it begins to howl.
> Then tap all the tubes with the eraser end of a pencil.  The one that
> makes the noise is bad.
>


Actually what you need to do this job properly is
the "correct" tool, instead of just using any old
pencil eraser you need to use a genuine
"Carolina Tube Tapper".
These are available form the CC-AWA.
You can see them when you visit the CC-AWA
web page at http://www.cc-awa.org
and click on the "Goodies for sale"
button on the main menu.

73,

Ron

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Ron Lawrence  K C 4 Y O Y
CC-AWA Chapter President & Conference Chairman

email: kc4yoy at trellis.net

snail mail: POBox 3015
                Matthews, NC 28106

home phone: 704.289.1166

Check out the CC-AWA web page at:
    http://www.cc-awa.org

The Antique Wireless Association's web page is at,
   http://www.antiquewireless.org

Visit "Radio Heaven" at:
   http://RadioHeaven.homestead.com/RadioHeaven1.html

Member of: AWA, CC-AWA, TCA, &  ARRL

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