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Old 10th November 2003, 03:25 PM   #1
ICARE is offline ICARE  France
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Default Svetlana SV572-10 ???

Hello

I want a build a SE tube amplifier for my speakers Audio-Note AN-AZ Three 94 dB.
Somebody know this tube ?, any information etc..etc...will be great.

What do you think of the shema of Eric Barvour ?

Click the image to open in full size.

Thanks in advance.
J-Y

Do you think than 8W will be enough
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Old 10th November 2003, 03:37 PM   #2
Fuling is offline Fuling  Sweden
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I have some doubts about zero bias and cap coupling, I feel that some direct coupled topology would be better here since the output tube will draw quite some grid current.

Search for Bob Danielaks audio page, he has built something with SV811-10 if my memory serves.
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Old 10th November 2003, 03:59 PM   #3
ICARE is offline ICARE  France
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Thanks, I know this page: http://www.geocities.com/TimesSquare/1965/projects.html

But he recomand the SV572-10 instead of the 811.

With my speakers 94dB, do you think than 2*6 W is enough or it will be beter to have a least 2*10 W

J-Y
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Old 10th November 2003, 10:54 PM   #4
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Hi,

Quote:
With my speakers 94dB, do you think than 2*6 W is enough or it will be beter to have a least 2*10 W
2*6 W or 2*10 W isn't going to make much of a difference decibelwise.

Eric Barbour knows his stuff, so does Bob Danielak...often the curves of the tubes tell the story.

Cheers,
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Frank
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Old 11th November 2003, 12:06 PM   #5
ICARE is offline ICARE  France
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I dontīt know what to thing, a lot of person in BELGIUM, I think you know the forum !!! told me than with 94 dB, I need at least 12-15 W for having a "realiste" sound.

Do you have a shema of a SE 15W with TK88 or SV572-10, I heard good comment on this tube.

see you
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Old 11th November 2003, 12:14 PM   #6
Fuling is offline Fuling  Sweden
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Uhm, whatīs the big deal about efficiency and power, really?
I love the way my ~1W "Monkey" amp sounds with together with my ~87dB speakers
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Old 11th November 2003, 12:54 PM   #7
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Hi,

Quote:
I dontīt know what to thing, a lot of person in BELGIUM, I think you know the forum !!!
Maybe I do...I only know of one, the going language is Dutch.
If you want to read alot of crap that's the place to go...

Quote:
told me than with 94 dB, I need at least 12-15 W for having a "realiste" sound.
Well, it never hurts to have some spare Watts provided they're good quality.
Enter the SV572-10...

I did a Google and found more info than I'd hoped for:

SV572-10

Cheers,
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Old 11th November 2003, 01:25 PM   #8
ICARE is offline ICARE  France
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Thanks,

No the forum is in french: http://ptsoundlab.jexiste.fr/forum

I already read and see the pages, but thanks anyway. I cannot decide beetween KT88 SE 11W and the SV572-10 by E.Barbour.

See you
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Old 11th November 2003, 11:06 PM   #9
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Quote:
I cannot decide beetween KT88 SE 11W and the SV572-10 by E.Barbour.
FWIW, I don't think the sv572's are currently being manufactured. Not that they aren't stocked up in various places, but you'll find higher prices for these along with the possibility that they won't ever be made again. Very cool tube though. See the svetlana tech. bulletin page for some more designs.

The sv572 isn't really in the same category as the kt88. The mu=10 version relies on driving grid current to get much power out at low plate voltage, requiring a low impedance driver (direct or xformer coupled, preferrably). There is also a mu=3 version that is more like an 845, requiring high drive signal at high plate volts if you want to get the most out of it.

that probably doesn't help you, though...
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Old 12th November 2003, 01:52 AM   #10
tinear9 is offline tinear9  United States
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I'm listening to "my" version of the Eric Barbour amp as I type. I love it! I've heard it next to some nice amps and I have never been embarrassed. I recently went with a 6DN7 front end in place of the 6EM7 (80K plate resister) and a quasi ultrapath cap for the input. I prefer it to the strict Barbour based circuit. By the way, I also prefer the SV811-10. It always seems a little more "ballsy" than the SV572-10. Better for electric blues. Not your fathers 300B or 2A3 based amp but very nice!
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