Thread: Does this mean my 21AXP tube has gone to AIR???
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Old 03-17-2015, 02:18 PM
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rca2000 rca2000 is offline
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I tried it both ways--with the big socket AND the uni adapt. NO difference.

The tester DID work later on another tube.

I KNOW the 70 has a current-limited fil supply, and it seems to be limiting it--likely due to too much draw.
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