On Sat, May 18, 2024 at 06:52 PM, Joe - W7RKN wrote:
It appears I have a shorted 3-500Z tube in my AL-82 amplifier.
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It also appears that right now the 3-500Z or ZG tubes are unobtainium.
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Sellers on eBay are selling new Penta tubes for a ridiculous amount of money.
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Are Penta tubes any good?
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Perhaps I should ask first, who has 3-500’s for sale?
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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.
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Thanks in advance, for any questions answered!
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Joe – W7RKN
###? Cheapest price is HARBACH ELECTRONICS.....which re-opens on May 20....at the stroke of midnight EST.
$275.00? each.? ?$550.00? for a matched pair.? ?Free shipping, no tax.
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These are the good ones, with the white base.?
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