Chinese 3-500ZGs are compatible with Eimac 3-500Zs in that they have
c. the same ZSAC at the same bias-V. -- i. e., they have a similar Mu.
cheers
On Apr 3, 2004, at 3:26 PM, Jeff King wrote:
A question from a new comer. While rebuilding the SB221, I turned it
on at
final test and one tube did not light well, then after about 15
seconds long
15 mm long sparks in side near the base, then does not light at all,
and it
is slightly whiter inside. Dam!
I need another Eimac 3-500Z. (Not easy to find, Only 3-500ZG is
available
new.)
One reads occasionally that it is not so important to have matched
pairs of
tubes. How much can you safely miss match tubes? Does this extend so
far
that one could run an different brand tube, Ie an RF parts 3-500ZG-RF
or a
Taylor 3-500ZG with and Eimac 3-500Z?
You will probably laugh at this. Does anyone have knowledge of safely
running such a pair of different tubes?
I look forward to your advice.
Yours sincerely
Jeff ZL:4AI
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Rich Measures, AG6K, 805.386.3734. www.somis.org/
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