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 NEW  Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization.

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 Post subject: GU 50 Amp
PostPosted: 13 Apr 2018, 15:36 
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Joined: 04 Jun 2008, 20:59
Posts: 3786
Location: Arizona, USA
Hi, Has anyone used a GU50 in a SE U/L amp? I'm thinking of doing that. About 400B+ with around 75 ma cathode current. Load likely in the 3-4K range. It looks like it should behave about like a KT88....

Good listening
Bruce

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 Post subject: Re: GU 50 Amp
PostPosted: 14 Apr 2018, 05:54 
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Joined: 08 Aug 2009, 03:11
Posts: 2229
Location: Chilliwack, BC
Looks like some work was done on one over at Shannon's forum:
http://www.diytube.com/phpBB2/viewtopic ... hilit=gu50

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 Post subject: Re: GU 50 Amp
PostPosted: 14 Apr 2018, 06:43 
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Joined: 02 Mar 2009, 12:41
Posts: 1057
Location: Vänersborg, Sweden
I did once build one.Of some reason it was scrapped, maybe because I wanted the components to build a 50CA10 SE-amp.
Let's see what I can come up with ...

Yepp, here it is: http://www.pastisch.se/tubes/gu50.htm

I used the top schematic with EC52 driver.

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