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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: using Hickok 539B to measure plate cueent in output tubes... posted by gkargreen on December 3, 2014 at 14:54:26:
A few Hickok testers have this or similar provisions. While, as you note, the Hickoks run the anodes at ~ 150V, g2 even lower, I've found that power tubes selected to match for anode or anode+g2 current will be relatively matched to each other at higher anode voltages: just not as well matched as a selection made at more typical operating point. IOW, you get a considerably better overall match than one based on gm alone but not as good as a match made at full operating voltage and current.
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Follow Ups
- RE: using Hickok 539B to measure plate cueent in output tubes... - Steve O 16:49:26 12/03/14 (1)
- RE: using Hickok 539B to measure plate cueent in output tubes... - gkargreen 17:03:32 12/03/14 (0)
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