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: Does anyone know anything about these new Tung-Sol KT170 output tubes ?

Posted by 6bq5 on May 27, 2021 at 08:21:28:
I am kind of suspicious as to the value -
The KT-90 had horrible hysteresis, and I have not seen good analysis of any of the subsequent developments

if the KT-88 / 6550 does not have enough power -
Use the 811, 845 or the like

In any case the need for an excellent OPT may override the exercise ....