Are these in the RF section or the DC power supply? Sounds like you mean
the RF section...
No matter how good the material is, many such standoffs actually have very
little space inside to separate the bottom (mounting) and the top (component
attachment) machine screws that thread into them. I have some very hefty 2"
long insulators that actually only have about .15" of ceramic between the
two screws, if long screws are used. I've blown some of those up, over the
years.
"Carbon pitting?"
-WB2WIK/6
"Each success only buys an admission ticket to a more difficult problem." --
Henry Kissinger
> -----Original Message-----
> From: Geo Clute W7LFD [SMTP:gclute@attbi.com]
> Sent: Thursday, January 31, 2002 7:55 AM
> To: amps@contesting.com
> Subject: [AMPS] Porcelain Standoffs
>
>
> I've experienced some arcing problems with porcelain standoffs. It
> seems to start with a carbon pitting and then at some point it heats
> the porcelain and causes an explosion inside the cabinet. Is this
> being caused by poor quality (military surplus) or maybe a some
> bizarre high frequency parasitic?
>
> Geo W7LFD
>
>
> --
> FAQ on WWW: http://www.contesting.com/FAQ/amps
> Submissions: amps@contesting.com
> Administrative requests: amps-REQUEST@contesting.com
> Problems: owner-amps@contesting.com
--
FAQ on WWW: http://www.contesting.com/FAQ/amps
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
|