Tubes Asylum

Questions about tubes and gear that glows. FAQ

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.

You must login to use this feature.

Inmate Login

By default, logging in will set a session cookie that disappears when you close your browser. Clicking on the 'Remember my Moniker & Password' below will cause a permanent 'Login Cookie' to be set.

Moniker/Username: The Name that you picked or by default, your email. Forgot Moniker?	Examples "Rapper", "Bob W", "joe@aol.com".
Password:	Forgot Password?
	Remember my Moniker & Password ( What's this?)

If you don't have an Asylum Account, you can create one by clicking Here.

Our privacy policy can be reviewed by clicking Here.

Inmate Comments

From:
Your Email:
Subject:

Message Comments

Original Message

RE: Bringing it up with a 5AR4 wont get you there.

Posted by PakProtector on June 3, 2022 at 08:49:45:
The slightly easier way is to just plug in something else. a 5Y3 for instance, and some 6V6's or perhaps cheap 6L6's. Goal is not to get full performance, but reach 75% of B+ and deliver some idle current load.

All in all, for a flipper amp, bring it to the point where you can guarantee the transformers is a useful thing.

And heating up an amp with a GZ34 is not too difficult with a variac and volt meter. Recognize the non-linear behaviour and account for it with the variac's knob.
cheers,
Douglas