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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: I subbbed A 12BH7 in place of a 12AX7 in the Eico HF-87 posted by Michael Samra on September 1, 2013 at 16:46:50:
The 12AX7 in the HF-87 sets the bias for the 6SN7.
You will want to detune that 100K resistor until you once again have 120V on the plate of the first stage, then you may be able to make a valid comparison.
-PB
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Follow Ups
- RE: I subbbed A 12BH7 in place of a 12AX7 in the Eico HF-87 - Caucasian Blackplate 09/1/1320:02:53 09/1/13 (1)
- RE: I subbbed A 12BH7 in place of a 12AX7 in the Eico HF-87 - Michael Samra 00:33:55 09/2/13 (0)
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