On 1/27/2012 3:46 PM, Roger Dixon wrote:
> Hi Chaps,
> I recently completed my 50MHz 4CX1000A amplifier. However the Eimac pull I
> have had for a while suffers from excessive secondary emission.
Are you familiar with Tetrode tuning? At what level of screen current
do you start getting secondary emission?
> The question. I have recently obtained a NOS 4CX1000A. However, despite
> being offered as an "Eimac" NOS, both the valve and the original box are
> branded General Electric. Does anyone have any views as to the
> quality/specification of a valve such as this that is non Eimac branded?
I've not heard of any problems with GE constructed 4CX1000A's. GE has
built a lot of high powered tubes in the past and particularly for the
I'd not be concerned about a GE tube, unless some one comes up with
information on a problem with those tubes.
> Roger - G4BVY
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