|
Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
|
|
|
Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
|
In Reply to: Re: No, U-L was invented by Alan Blumlein in 1937, posted by Ray Moth on March 19, 2007 at 19:04:44:
Hi.I don't know why this shared O/P load topology was so called "Ultra-linear". Technically, it is sorta kinda a blend-up of a pentode efficieny & a triode low-distortion transfer.
If you compare a U-L transfer chart, you will see the transfer traces look like a very distored triode transfer curve, kinked in a way towards a pentode curve. The curve forms of course change per the tapping percentage on the primary of the O/P iron.
Although commonly it was 43%, but Mullard used 20% & LEAK used 50%.
Both Peter Walker of QUAD, & Williamson objected using the term
"ultra-linear" & preferred the more appropriate terminology of "distrributed load", to which I concur.Put asisde the O/P power efficiency being much better than a trioide, which IMO, is the objective of U-L design, its transfer curve clearly told us it can't outperform a triode's linearity.
So why called it "ultra linear"? I scratched my head on this terminology. IMO, it could be a marketing tactics, who knows?
c-J
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Good question on "Ultra-Linear". - cheap-Jack 13:39:39 03/20/07 (1)
- Misinformation - fatbottle 03:46:15 03/22/07 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2024, Audio Asylum, all rights reserved ]
