SET Asylum

Single Ended Triodes (SETs), the ultimate tube lovers dream.

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: Yes - let's define filament bias

Posted by tube wrangler on September 4, 2017 at 05:14:06:
Honest observations, but cathode bias CAN be done right.

This does avoid installing chips designed by geniuses.

It's no longer a tube amplifier if solid state devices
are used in the amp, it's a hybrid.

Sonically, I prefer the sound of a vacuum tube acting
alone-- with no devices or control devices attached to
it, even if that's another vacuum tube.

The good thing about cathode bias is that you're using
only passive devices on the cathode. The "bad"
(as in expensive) thing about it is that it
requires multiples of expensive caps, no one cap
can even begin to work at the highest audio performance
levels. Also, the cathode resistor had better be the
world's best resistor. (Tiny audio currents thru the
resistor not withstanding).

I appreciate your comments and I always enjoy learning
from other worlds.

-Dennis-