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 Post subject: Re: 211 SE power amp
PostPosted: 23 Sep 2013, 19:00 
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Location: Australia
Sorry for the delay. I'll get back to you about the tranni specs. I've nearly finished the tube and chip amp then I'll look for the tranni. Thanks for suggestions and help so far.

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 Post subject: Re: 211 SE power amp
PostPosted: 26 Sep 2013, 19:23 
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Just completed the tube and chip amp ("Number 9") late yesterday and now have found the info. for the power tranni.

According to the quote from Torema Australia: 1200V center tapped 400mA. Also it appears I ordered a 10V 8A filament transformer??? Now I'll try and find the tranni.

Also I'll locate which OPTs I purchased. Sorry for the stuff around.

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 Post subject: Re: 211 SE power amp
PostPosted: 28 Sep 2013, 05:39 
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A link to a write-up on a 211 commercial amp. Maybe worth a read: http://www.stereophile.com/tubepoweramps/687/index.html

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 Post subject: Re: 211 SE power amp
PostPosted: 28 Sep 2013, 07:05 
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I see the suggested retail price on that thing is $10K :hot:

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 Post subject: Re: 211 SE power amp
PostPosted: 28 Sep 2013, 07:18 
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Geek wrote:
I see the suggested retail price on that thing is $10K :hot:

I'm hoping to make mine for less, lol.

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 Post subject: Re: 211 SE power amp
PostPosted: 29 Sep 2013, 20:59 
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Found the power trannies. The big one is 600V-0-600 @ 400mA and smaller one is 10V 8A.
Attachment:
Trannies.jpg


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 Post subject: Re: 211 SE power amp
PostPosted: 29 Sep 2013, 21:40 
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WAAAAAAANT! :thumbsup: :beerchug:

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 Post subject: Re: 211 SE power amp
PostPosted: 29 Sep 2013, 23:53 
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Geek wrote:
WAAAAAAANT! :thumbsup: :beerchug:

What did you say Geek? Not big enough (lol)??

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 Post subject: Re: 211 SE power amp
PostPosted: 30 Sep 2013, 14:55 
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mwhouston wrote:
The big one is 600V-0-600 @ 400mA
Hmmm....

This presents a little issue. You see, when you said a 1200v transformer, I assumed 1200-0-1200 and designed an amplifier that requires a B+ of 1350V. Obviously this transformer won't fit the bill. Of course, the PS for that amp was going to be a challenging build. Both in required build technique and acquiring the required parts.

Given this transformer, I can design a different amp, but the power output will be much lower. However, the power supply build will be MUCH easier.

So Mark, which is it to be: high power and very challenging PS build, or lower power but using existing parts? Let me know which way you'd like to go.

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 Post subject: Re: 211 SE power amp
PostPosted: 30 Sep 2013, 16:35 
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Suncalc wrote:
mwhouston wrote:
The big one is 600V-0-600 @ 400mA
Hmmm....

This presents a little issue. You see, when you said a 1200v transformer, I assumed 1200-0-1200 and designed an amplifier that requires a B+ of 1350V. Obviously this transformer won't fit the bill.


If you use a FWB, you can draw up to ~180mA, I think it goes....

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