Un obtanium ? What makes you think and then say that ?
Penta and all the others are Chinese. Ones with the white ceramic base all come from the same factory, and are from the better of the two factories over there.
Yes penta’s are good, also excellent customer service.
73 Scott
MOn 2024-05-18 10:52, Joe - W7RKN wrote:
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It appears I have a shorted 3-500Z tube in my AL-82 amplifier.
It also appears that right now the 3-500Z or ZG tubes are unobtainium.
Sellers on eBay are selling new Penta tubes for a ridiculous amount of
money.
Are Penta tubes any good?
Perhaps I should ask first, who has 3-500’s for sale?
I am going to replace the T/R relay in the amp while I have it
open….Been a weak component in the amplifier since it was new. Been
replaced twice now and the amp is only 4 years old.
A friend who is an amplifier guru is going to look into building an
external, plug in, relay setup for me. Then I could go to a vacuum
relay and my T/R relay issues would be over! Just to be on the safe
side, I just purchased 3 relays from Ameritron (MFJ) to have when they
are no longer doing business. If I do the relay modification, the
Ameritron relays should sell fairly quickly as it appears all their
high power amps use the same relay.
Thanks in advance, for any questions answered!
Joe – W7RKN
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