EL84 and true pentodes interesting question

SET Asylum

Single Ended Triodes (SETs), the ultimate tube lovers dream.

Guys,

I have noticed something interesting about the use of EL84s and a Russian variant that I'm using that is a true pentode (no internal cathode to grid 3 connection). I have my sockets connected to run either type of valve (grid and grid 3 wired together)

Here's the interesting part..

When using the Russian Pentode, I get a very loud thump/fart sound when I power down the amp. When using EL84s, no sound at all when I power down. Because of the socket wiring I can't imagine how they can be electrically different. I have not yet had a close look at the Russian pentode data to see if there is something significantly different from the EL84..

Thoughts??

Stuben

This post is made possible by the generous support of people like you and our sponsors:

Kimber Kable

Topic - EL84 and true pentodes interesting question - Stuben 12:58:31 04/24/14 (5)

Pedantic note - Paul Joppa 19:21:15 04/25/14 (1)

RE: Pedantic note - Stuben 05:35:39 04/26/14 (0)

RE: EL84 and true pentodes interesting question - Stuben 18:16:05 04/24/14 (0)

Why would you tie G1 & G3 together at the socket........ - vinylkid58 16:03:02 04/24/14 (1)

RE: Why would you tie G1 & G3 together at the socket........ - Stuben 18:15:08 04/24/14 (0)

FAQ

Post a Message!

Forgot Password?

Moniker (Username):
Password (Optional):
	Remember my Moniker & Password (What's this?) Eat Me
E-Mail (Optional):
Subject:

Message:	(Posts are subject to Content Rules)

Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:	Automagically notify you when someone responds.

To view your new posting or follow-up, click on the RELOAD or REFRESH button on your browser.