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

Study of a low IMD all 6SN7 amplifier

Posted by cellailuca on November 25, 2021 at 02:46:12:

Sometimes a new asylum post makes you wonder about a novel 'what if'.

A recent series of comments on IMD has triggered my interest in 'what if I replaced (mutatis mutandis) one EL84 with two 6SN7 tubes in the same circuit?'.

We are talking about a class A 4-5W amplifier.

In sim world I found out that this all 6SN7 circuit performs much better than any EL84 circuit I have ever simulated.

How much better?

The decision is up to you.

You can trade in much lower IMD in exchange for a higher gain.

Schematic, output signal graph, output currents and the spectra (between 9 and 10 seconds, between 10 and 11 seconds, between 11 and 12 seconds speak by themselves.