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In Reply to: RE: phono noise floor posted by dadbar on February 24, 2015 at 12:32:17
Not something I had considered, thanks. I did replace the bridge, but I'm not certain what the heater voltages are nor had I noticed that they should be so low. I'll check it out.
Dave
Follow Ups:
At the very least it will spare you from prematurely wearing out a set of TFK 12AX7's
By the way, if you have them, a set of 1950's Raytheon black plate tubes are sensational in the phono position.....even better than the TFK IMHO....and quieter.
David
If its at 12.0vdc or higher on the phono tubes especially,get it down to around 10.6vdc..With the heater voltage too high,this will cause rush because you are really pushing the tube hard.
"If it measures good and sounds bad, it is bad; if it measures bad and sounds good, you have measured the wrong thing."
- Daniel R. von Recklinghausen
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