[AMPS] parasitics

Tom Rauch w8ji.tom@MCIONE.com
Thu, 21 May 1998 06:54:22 +0000

> Date:          Thu, 21 May 1998 03:00:35 -0800
> From:          Rich Measures <measures@vc.net>
Hi Rich,

I've asked Eimac engineers if there is any merit to your claims, 
and they always say no. They say, once heat damage occurs, it is 
virtually impossible to determine why it happens. They also hqave 
said the heating trend you see is not the heating trend they see. 

But let's assume you really did see what you claim....
> What if the gold blisters are only near the grounded end of the grid 
> (which is where I typically see them)? 

Exactly why is it you think that tells you something about the nature 
of the heating?

And how often is "typically"? Did you keep statistics?

> Would DC current be likely to 
> cause this? 

It could.

>Would HF current be likely to cause this?

It could. 

I think we can put numbers on it, if you explain the physics you 
suspect are at work.
73, Tom W8JI

FAQ on WWW:               http://www.contesting.com/ampfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm