[Amps] Proof of idiocy

[R at contesting.com]

On Mar 13, 2006, at 4:43 AM, HAROLD B MANDEL wrote:

> It is possible that the threads are bunged on the
> leadscrew or the collar, but good  luck locating
> a tap or die!
>
> These threads are Jennings proprietary pitch
> and once fouled there is no way to chase them
> or to re-cut.

The threads are 1/4 - 23 -- for which taps and dies are available.
>
> The alternative is to substitute pieces from
> another vacuum variable and hope for the
> best.
>
> If the junction that pulls the bellows on the
> room-pressure side is gone and the threads are
> still good then the piece can be used for the collars
> and lead screw threading.
>
> Allen Bond and Economy sell very decent vacuum
> variables to the amateur. I have bought several
> ceramic and glass types from each. The most important
> feature is that both of these businesses HiPot each
> item before it ships and will not send a DOA or
> leaky variable.
>
> Buyer Beware: Things seeming to be too good to be
> true often are.
>
> Hal
> W4HBM
>
>
>
>
> On Sun, 12 Mar 2006 19:35:08 -0500 "Will Matney" <craxd1 at verizon.net>
> writes:
>> $148 and gowing on! The only usable piece looks to me like would be
>> the flange on the rear. The high bidder now looks to be an
>> engineering firm......
>>
>> http://cgi.ebay.com/Jennings-Vacuum-Variable-Capacitor-5-kV-9-500- 
>> pF_W0Q
> QitemZ7597842893
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>



Rich Measures, 805.386.3734, AG6K, www.somis.org