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

General comments

Posted by drlowmu on April 15, 2012 at 23:34:18:
I think chokes are really nice on all classes of high quality audio amps, class A1 and A-B, SE and P-P.
1 1/2 volts AC of ripple is NO PROBLEM in a A-B amp that is P-P. Ripple is "overrated" by designers generally speaking, not too important as to what makes an amp sound good.
Sometimes a small (under 1 uF) "c" input filter is helpful.
There are things that well-chosen chokes do, that make them indispensable.
I would consider the use (or non-use) of chokes in vintage amplifier designs, had more due to marketing and cost and weight considerations, than absolute all-out performance considerations.
My favorite choke configuration after many years of testing amps of all types, is L1/C1/L2/C2. It is far more refined sounding to my ears than L1/C1, and it always came out on top.
I will let others advise you on finding chokes for choke input duty.
One final word of advice, my original audio mentor always advised me to use chokes that are 20 Ohms or less in DCR, and I have found that to be fabulous advice.
Jeff Medwin