Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

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: If you are looking for better bass response...

Posted by PeterI on June 21, 2021 at 15:55:29:
Thanks for that info. Actually, I'm imitating the Eico HF81 output, same as the HF14 monoblock amp. I've owned, worked on and restored 4 HF81s (now sold). I have some pretty good vintage OPTs. I guess I'll stay close to original R and C values.
If I find another trashed HF81 (a hard to find item now), I'd probably restore or rebuild, as I have before. Fun to work on.

Cheers
P