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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: Quick Quicksilver preamplifier question posted by Lew on November 10, 2013 at 07:43:40:
I'd try getting rid of the 12AU7 altogether and repl w/12FQ7. Watch out for different pinouts of FQ7 vs AU7 and make sure filament voltage is correct (not familiar with preamp specifically). Another pin compatible alternative for 12AU7 is 12BH7...if the filament supply can handle 2x current, it just plugs in. The AU7 and FQ7 are similar enough that no circuit changes other than pinout should be reqd. The BH7 will play OK in an AU7 position but optimum results might require changes to anode and cathode resistors.
Personally, I've used 6CG7/FQ7s in AU7 positions with good results in power amps.
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Follow Ups
- RE: Quick Quicksilver preamplifier question - Steve O 08:40:39 11/10/13 (7)
- What Steve said~nT - Cleantimestream 23:08:18 11/10/13 (1)
- What I said,... - Lew 07:28:39 11/11/13 (0)
- pin 9 - Lew 13:43:35 11/10/13 (2)
- RE: Quick Quicksilver preamplifier question - Lew 10:51:04 11/10/13 (0)
- RE: Quick Quicksilver preamplifier question - Lew 10:42:58 11/10/13 (0)
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