|
Tubes Asylum Questions about tubes and gear that glows. FAQ |
For Sale Ads |
Use this form to submit comments directly to the Asylum moderators for this forum. We're particularly interested in truly outstanding posts that might be added to our FAQs.You may also use this form to provide feedback or to call attention to messages that may be in violation of our content rules.
Original Message
Bringing it up with a 5AR4 wont get you there.
Posted by viridian on May 26, 2022 at 09:06:16:
A tube rectifier is not linear in the way it conducts. So at low voltages from your variac, it is not on at all, then, at some point, it comes on.
If you are trying to find out if the amp is bad, or reform the caps, buy one of the cheap, socketed, solid state rectifiers off of the internet, or break open a worn octal tube and solder in a couple of diodes, or even tack solder them to the back side of the 5AR4 socket. You can then bring up the amp in a linear fashion.