It is currently Tue Mar 17, 2020 5:12 am

All times are UTC - 7 hours



Post new topic Reply to topic  [ 18 posts ]  Go to page Previous  1, 2
Go to page Previous  1, 2
Author Message
Post subject: Re: Biasing - Am I getting this right?
Posted: Mon May 02, 2011 10:52 am
Offline
Rock Star
Rock Star
User avatar

Joined: Wed Feb 17, 2010 11:38 am
Posts: 4333
Location: Tennessee
Since we're on the subject,and biasing is relevant to both....what 6L6GCs do you favor bluesky?


Top
Profile
Fender Play Winter Sale 2020
Post subject: Re: Biasing - Am I getting this right?
Posted: Mon May 02, 2011 11:08 am
Offline
Rock Star
Rock Star

Joined: Mon Apr 05, 2010 2:37 pm
Posts: 8708
Location: Natural Bridge, Virginia
BMW2002Ti wrote:
That site appears to max watts PER tube:

http://www.webervst.com/tubes1/calcbias.htm

Not push-pull pairs. I had my Princeton setup for 8 watts per tube. Which is much more conservative than the rated 12 watts the site states for 6V6GT tubes. My Champion 800 puts out about 6 watts and it's an SE-amp, Class "A" amp.

The tubes were actually almost flaming red glow from top to bottom of the anode plates.

The Hytrons 6V6GTY, at the same bias, didn't glow. Even little spots on the plates.

I'm thinking either I got a crummy pair of TungSols. Or they need to be biased around 5-6 watts per tube.


I agree with Arjay. The Weber tables have never led me wrong when biasing 5881s (25 watt max plate dissapation) or 6L6GCs (30 watt max plate dissapation).

_________________
Bill

Image


Top
Profile
Post subject: Re: Biasing - Am I getting this right?
Posted: Mon May 02, 2011 11:12 am
Offline
Rock Star
Rock Star

Joined: Mon Apr 05, 2010 2:37 pm
Posts: 8708
Location: Natural Bridge, Virginia
Rebelsoul wrote:
Since we're on the subject,and biasing is relevant to both....what 6L6GCs do you favor bluesky?


I use JJs from Eurotubes in my Blues Deluxe Reissue. I have them biased at 38 mA cathode current (approximately 36 mA plate current) at 413 VDC plate voltage. Per the Weber table, that is right about 50% which would seem quite cold (I don't think the BDRI power supply is very stiff), but they sound very sweet to me. Do a search in this forum on my posts as I have written quite a lot about biasing this amp and my tube choices.

_________________
Bill

Image


Top
Profile
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 18 posts ]  Go to page Previous  1, 2
Go to page Previous  1, 2

All times are UTC - 7 hours

Fender Play Winter Sale 2020

Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to: