|
Dynaco-Doctor Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
|
|
|
Dynaco-Doctor Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
|
In Reply to: Rectifier Arc Bad tube or something more? posted by jerkbag on December 20, 2013 at 07:50:55:
If replacing the rectifier tube solved the problem, it tends to exonerate the amplifier. However, it is always a good idea to check the internal voltages against some reference. The original Dynaco manual had a voltage chart for this purpose. Of course, I do not know if yours is original or modified, but, whatever you have, hopefully you can acquire a list of reference voltages for the different nodes.In any case, if your internal voltages check out okay, then the amp is probably fine. New Sensor recently came out with some new 5AR4s that will hopefully live longer. If you are going to continue using the less costly current production 5AR4s like JJ or Sovtek, you can do the "diode mod," where you put a diode in series with each plate thereby setting up a voltage divider that reduces the peak inverse voltage demands on the 5AR4. Of course, this should not be necessary to do with a vintage 5AR4 and hopefully not necessary for the new 5AR4s that just came out...
Edits: 12/20/13 12/20/13
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: Rectifier Arc Bad tube or something more? - petercapo 10:46:24 12/20/13 (2)
- RE: Rectifier Arc Bad tube or something more? - jerkbag 11:28:09 12/20/13 (1)
- Here's a link - 1973shovel 15:20:33 12/20/13 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2024, Audio Asylum, all rights reserved ]
