|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
76.220.25.80
In Reply to: RE: Do rectifier tubes need to be "matched?" posted by Michael Samra on May 28, 2014 at 18:55:28
Such as the 2 EZ-81's in the Eico HF81?
Follow Ups:
The same rules apply. As long as you don't have one near dead and one brand new (I'm exaggerating a bit) you'll be fine. One rectifier will virtually always be passing a bit more current than the other for any number of reasons.
The Amplitrex AT-1000 has the nice ability to test voltage drop across a rectifier with 275 volts AC applied to each plate. But even if those tested absolutely equal, small differences in heater voltage or AC voltage in the amp means the "match" will still be off some.
You can put a small value resistor between the rectifier and the filter - that will help equalize things as well.
Jim
I'm just going to buy a new Amplitrex because that used one went for 2400. I will see if I can con the company out of a basic schematic.
Honest amplification is better than excessive 2nd order distortion anytime.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: