[Amps] 3-500Z labeling

[Mark Schoonover]

Many times once they're burned off!

On Fri, Dec 7, 2018, 18:38 Paul Baldock <paul at paulbaldock.com wrote:

> I have two 3-500Z's that I removed from a Drake L4B. These tubes have
> no brand labeling or residue of labeling. They are the variety that
> have 5 Anode disks. Has anybody seen 3-500Zs with out brand marking?
>
> - Paul  KW7Y
>
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