OTL Asylum

OTL, Output Transformerless Amplifier User Group.

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: From what I understand the Zero's...

Posted by cpotl on May 6, 2017 at 15:18:30:
"I don't understand your phase "Iron Core". There is no iron in the Zero's, just copper."
Ah. I was assuming they were wound on iron cores. isn't that the case? I found a review somewhere, and it said
"...a pair of massive toroid transformers, that remind me of what you'd see as power trannies in a 250 wpc solid state bruiser. These have a biwired pair of black and white 14 gauge silver plated copper leads for your speaker connection, and on the other end you have have 4 wires, color coded gray, yellow, blue, and brown. These are your multiple impedance taps."
I was guessing the toroid cores were iron. Is that not the case?
Chris
BTW my phrase "iron-cored components" was a quote from one of the early articles presenting an OTL design, by Dickie and Mackovski in 1954.