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Seems less like a dummy load and more like a "the gun bias is/isn't in the right to make a picture" meter.
Though someone who actually owns one will probably now tell me I'm mistaken.
There was a special vacuum tube that was basically a 10BP4 gun and base firing into a small anode which was a proper dummy load...This tube was basically the proof of concept for the 6BK4 and was like an oversized version of it.
Last edited by Electronic M; 09-02-2022 at 02:00 PM.
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