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Old 20th April 2010, 02:01 PM   #31
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Quote:
Originally Posted by io View Post
Nice work.
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Old 20th April 2010, 03:21 PM   #32
Marek is offline Marek  Poland
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Io, which Sowter is it?
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Old 20th April 2010, 06:49 PM   #33
io is offline io  Hungary
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Sowter 9762
Primer 200 ohm tantalum 0,5W
Secunder 3k1 Remix534 0,9W
Vout 2,1 Vrms
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Old 20th April 2010, 08:40 PM   #34
io is offline io  Hungary
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2 secunder in parallel
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Old 21st April 2010, 08:10 AM   #35
Marek is offline Marek  Poland
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io,

try this configuration:
secondary in series
8,2k across secondaries
100ohm across primaries

this should give about 2V output and DAC will see impedance about 12-13ohm (insted of about 20 in your case)

you can even try go into lower impedance (<10ohm): sec series, 3,1k, 13ohm and 1V output (if it is sufficient for your amp)

Marek
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Old 21st April 2010, 10:30 PM   #36
io is offline io  Hungary
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Thank you, have been rebuilt, it gets even better
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Old 22nd April 2010, 06:08 PM   #37
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Default Buffalo and LL1517

Just to put my 2 cents and sign to the club of BuffaloII & Transformers.

I'm just playing with Buffalo and Lundahl LL1517.

On some aspects probably IVY is technically better output stage with lower distortion and probably more “details” but with transformers Buffalo is playing "smooth and easy".
You just don't wont it to stop playing. .

And also very nice thing is that Buffalo with LL1517 can drive directly HD650 with absolutely no problem. Great Sounding and “SUPER SIMPLE” HedAmp.

Anyway Buffalo is really great DAC and Russ and Brian are doing amazing job about it.

P.S.
If I could suggested to TP the only “right way” of mounting the AVC Shunt reg is of cause GLT way .
This should be in Buffalo manual, specially when except of listening to Your DAC You intent to make an photo of it .

All the best

Rosendorfer
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Old 22nd April 2010, 06:23 PM   #38
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I asked a queston at the original Buffalo II thread about dual monos.

I was wondering if it would be possible to use transformers as the I/V output for dual monos?

Not sure about the resistance values I'd use across the primaries and secondaries.

I'd really like to not use an active I/V and Bal/Se combo for S.E. output

I came up with something like this:


Workable??

Jeff Davison
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Old 22nd April 2010, 09:31 PM   #39
io is offline io  Hungary
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Where can Sabre, woekable ? Sowter 9762 non center tap primer


io
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Old 22nd April 2010, 09:43 PM   #40
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You are correct about the 9762, just got a scheatic from Sowter to confirm.

I'll check out the 9545.

Will it need resistors on the primary or secondary to give the dac a needed reflected load?

Jeff


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Where can Sabre, woekable ? Sowter 9762 non center tap primer


io
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