Tube DIY Asylum

RE: The question doesn't match the content of your post

182.239.122.179

Eric Chan

A

In Reply to: RE: The question doesn't match the content of your post posted by Triode_Kingdom on November 24, 2023 at 14:07:25

Hi TK,

The right hand Triode has cathode R 360 ohm, I was saying if we assume this triode is second stage direct couple of another Triode (not shown in schematic). This triode shown in schematic used to be 360 ohm cathode R now has been elevated to 90V above ground, say 8K instead od 360 ohm. In this case do we also take in account of 8K for calculation.

Follow Ups:

RE: The question doesn't match the content of your post - Triode_Kingdom 13:28:22 11/25/23 (1)
"This triode shown in schematic used to be 360 ohm cathode R now has been elevated to 90V above ground, say 8K instead od 360 ohm. In this case do we also take in account of 8K for calculation."

Yes, the revised parallel resistance of 8K affects the low end response. You would probably need to use a bypass cap of about 100uF. I don't understand why you would want to elevate the cathode in this way, so maybe I've misunderstood the intent.
- RE: The question doesn't match the content of your post - Eric Chan 19:32:32 11/25/23 (0)
  > > why you would want to elevate the cathode in this way, so maybe I've misunderstood the intent.
  
  Because I am verifying the value of 2nd stage of ECC99

Post a Followup:

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.

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

Atma-Sphere Music Systems, Inc.