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: Power supply ripple???

Posted by TomWh on March 21, 2017 at 08:08:53:

Pulled first tube and the voltage when drop some but what was really different was the Hz went from 1-4kz to 10-30hz.

So I turn the power supply off and the scope stayed almost the same. So I took the probe off the power supply and scope went back to normal.

OK my conclusions are the the 1-4kz stuff on the tube in picture was Coming from 1st stage of phono section. The second picture with tube out is using the 3 chokes for antennas.

So it seems we are getting higher Hz from the phono stage and low frequency from the chokes picking something from the air. I did not think low frequency was pick up thru the air.

Well I can use all the information I can get.

Thanks Tom