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Report Review for product Vacuum Tube - 5AR4 / GZ34, JJ Electronics

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I tried two of these tubes and one failed after 30 minutes, the second (a replacement) immediately developed a cathode to filament short power was applied.

Vintage, used 5V4 and 5AR4 tubes are running reliably in this transmitter, however.

I would suggest avoiding JJ brand tubes, it has been very frustrating and an
expensive lesson, with all of the return postage, and loss of the tubes.

radioconnection - June 20th, 2020