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RE: The 300b setting will tell you if the tube is bad

After I posted this, that occurred to me. Oddly, I can't find a listing for the 300B either, although there is an adapter for the four-pin base. Is there another designation that tube is known by?


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  • RE: The 300b setting will tell you if the tube is bad - Todd A. 05:11:03 02/13/21 (0)

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