Re: 4-125A, vacuum tube do's and donts

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <FutureT-at-aol-dot-com>

In a message dated 4/9/02 10:38:53 PM Eastern Daylight Time, tesla-at-pupman-dot-com
writes:

Ed,

I'm not sure what Eimac says.  I've been running the 4-125A,
and the 4-250A that way for years with no problems.  But I guess
a problem could occur someday.  I don't run the coils that often
though.  Maybe someone will check Eimac's (CPI's) website.

Cheers,
John


>
>     I'm worried about the recommendation to tie the grids together and run
> the tube as a triode.  Has anybody checked with Eimac to see if this
> mode of operation is OK?  With some tubes it is, but with others may
> result in damage to the screen.  I can't find my Eimac book "The Care
> and Feeding of Power Tetrodes", which has information on the subject. 
> Maybe someone else has one.
>
> Ed
>
>