[Amps] RE: Need Help

[Harold B. Mandel]

Dear Tom,

The problem you mention is similar to a circumstance where a high-power
audio
reinforcement amplifier was being installed in a recording studio and
someone
heard a buzz and the speakers were not even patched in yet.

Upon close examination, the following was discovered:

1: There was corrosion on the copper leads at the supply circuit breaker.
2. The Neutral conductor buss bar clamp screw was not sufficiently
torqued.
3. The 10AWG leads connecting to the 30-amp Twist-Loc receptacle at the
    equipment bay were not sufficiently torqued.

Removing the primary leads, burnishing the copper with Scotch-Brite,
adding a
thin film of No-Ox-Id "A" (Special) anticorrosive grease and applying the
proper
torque to the a.c. connections solved the problem that was caused when a
severe
load was applied to crumby connections.

Respectfully,

Hal Mandel
KA1XO


On Tue, 17 Aug 2004 01:15:01 -0500 "Thomas Hix" <w4th at hotmail.com>
writes:
> I guess I didn't explain my situation very well.......When the 
> problem with 
> the arcing/buzzing sound is coming from the amp, and the HV meter is 
> showing 
> split second deflection at the same time as the arcing sound, the 
> amp is not 
> in transmit mode, it does it even before the step start timer kicks 
> in, it 
> continues to do it after the step start kicks in.....I do not key it 
> up 
> because I am afraid to with it acting this way, so it is not RF 
> getting back 
> into the amp as some of you have suggested......it cant be because 
> there is 
> no drive applied.
> 
> Thanks again.
> Tom......W4TH
> 
> 
> 
> Tom's Tubes: Specializing in Amateur Radio Amp Tubes & Sockets Also 
> G3SEK 
> Triode/Tetrode Boards & Kits http://www.tomstubes.com
> 
> 
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