National Union 5Z3 Rectifier Tube ~ Hanging Filaments ~ H
Tested on a Dan Nelson calibrated TV-7B/U for all conditions and Passed. Minimum for this tube is 40.
This tube reads: 53 and 55.
The pictures tell the rest of the story and are part of the cosmetic description so please take a close look at them. You will receive the item(s) pictured. These are slightly used tubes.
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