Tube DIY Asylum

My apologies....

63.16.64.75

In Reply to: RE: 5y3 vs 5r4 posted by waltr on April 13, 2008 at 15:30:02

I should have checked Emotive first. In a preamp, voltages are much lower, of course, about 300 volts being the tops.

Again, I would invert the chassis with the rectifier tube in and check the DC voltage at pin 8, the cathode of the rectifier. Both tubes used in your preamp can handle up to at least 300 volts DC, but I would hazard a guess that voltages of about 150+ at the signal tubes may not be unlikely. The voltages at the rctifier should probably be in the 300+ DC range. If that's the case, I wouldn't worry much about which rectifier you use.

Stu

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