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Old 12th June 2013, 04:10 PM   #991
generg is offline generg  Germany
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Quote:
Originally Posted by buzzforb View Post
.................. Interesting things i found was that two mosfets that had very similar looking curves and matched for Vgs on the tracer showed different yfs levels when loaded and tested with 1V signal.

You destroy all my hopes that with a curve tracer I would become PASS II.....

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Old 12th June 2013, 04:46 PM   #992
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destroy all my hopes
Pass-Out then ?

(matching pants not only implies identical color and fabric, but also width, length, stitches, just not a faked brand label)
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Old 12th June 2013, 08:40 PM   #993
Murdoc is offline Murdoc  Germany
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I like your metaphors!
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Old 12th June 2013, 08:51 PM   #994
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You are Generg, of the Golden Ear Clan, tribe, cult, whatever.
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Old 12th June 2013, 11:54 PM   #995
evanc is offline evanc  United States
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It lives...
I don't know if I'm proud or embarrassed but I got to give a listen. It took a while to make the mosfets behave but it seems to be working well. Two pairs of buz 901/906 driven by ba3 front end. The bias is set at 1.6 amps per output fet.
crclc power supply with 400 va 18 volt transformer.
I plan to build three more of the output stages and try them paralleled and balanced.
I can't really comment on the sound listening to one channel, but first impressions are pretty good.
Anyway it's fun to make stuff and even more fun when it works...
E
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Old 13th June 2013, 12:34 AM   #996
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Nice job, Evan. Nice caps, too.
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Old 22nd June 2013, 02:20 AM   #997
evanc is offline evanc  United States
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Finally got two channels going...Holy Sh!t this thing sounds good. There is so much different from other builds it's hard to say where the improvement is coming from. This is the second time I've used buz 901/906 outputs and I think that they may be part of what I like. The amp is very snappy. I will be building a couple more sets of output blocks to try balanced as well as well as just paralleling more outputs.
Thanks again too all the people who asked questions and answered them before I even had them...
Evan
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Old 23rd June 2013, 10:37 AM   #998
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Nice build. Dick's Picks 14? Boston Music Hall. Awesome CD. The Dead as a 5-some.
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Old 23rd June 2013, 11:22 AM   #999
Zen Mod is offline Zen Mod  Serbia
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Old 23rd June 2013, 11:30 AM   #1000
evanc is offline evanc  United States
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Nice build. Dick's Picks 14? Boston Music Hall. Awesome CD. The Dead as a 5-some.
Yep...sounds so good it's a shame I will need to take it back to the shop to box it up. No way it can stay in the living room like that.

Dicks picks 14 is a good one...also works well to keep interconnects off of the heatsinks......
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