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: Low Hy? How about no Hy?

Posted by Eli Duttman on May 5, 2007 at 20:29:11:
Ray,
I think the concept has merit, but can be improved on. A large capacitance at the I/P of a PSU filter introduces ripple freq. overtones into the B+ rail. A choke seems better to me for killing that sort of crud than a regulator is. However, if the I/P capacitance is kept reasonably small, the ripple fundamental will be dominant and the regulator WILL kill it. Set things up along the lines used with vacuum rectification. Place the bulk of the energy storage at the end of the filter.

Eli D.