DIY HiFi Forum

RE: Ella mods: Bridge rectifier (new comment)

192.28.2.17

In Reply to: RE: Ella mods: Bridge rectifier (new comment) posted by Goneill on June 28, 2007 at 20:25:57

I probably posted a schematic of the mods I did years ago. the links may be dead now.

basically, the idea is to replace the 15K(?), shared cathode resistor on the 6sn7 long-tailed pair with a constant current device of some type. this makes the impedance at the cathode very, very high and helps balance the signals off of the phase splitter. You also need to use matched load resistors on the 6sn7's once you do this. i'm using a mosfet cascode CCS, but there are many ways to do this.

im not disagreeing with you that a bridge rectifier sounds better, but i have no idea why this would be so. really the only difference is that the half wave rectifier has 60hz ripple, while the bridge has 120hz. current handling and regulation are not really an issue for the bias supply.

Follow Ups:

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.