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Old 24th April 2008, 09:07 AM   #11
Shaun is offline Shaun  South Africa
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Quote:
Originally posted by GlidingDutchman
Another full stage sans RIAA?
Yes. You split the gain between the two stages, instead of trying to do it in one go. Too much gain in one stage will degrade its performance (noise and bandwidth).
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Old 24th April 2008, 10:18 AM   #12
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Guys please do notice that by changing R14 to 27E it ups the amplification factor.

For MM it is 270E

D
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Old 24th April 2008, 10:35 AM   #13
AndrewT is offline AndrewT  Scotland
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Originally posted by AndrewT
+55db of gain from an LTP+VAS single stage amp sounds quite ambitious.
have you got the message yet?
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Old 24th April 2008, 10:44 AM   #14
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Quote:
Originally posted by AndrewT

have you got the message yet?

No need to get excited man!

Okay... I get the message...!
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Old 24th April 2008, 12:53 PM   #15
Bonsai is offline Bonsai  Taiwan
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I may be open to correction here, but I think this circuit has some resemblances to the Theadra from the seventies. Biongiorno design.

Maybe someone can recall this better than me. It is is, it got good reviews.



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Old 24th April 2008, 01:00 PM   #16
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Quote:
Originally posted by Bonsai
I may be open to correction here, but I think this circuit has some resemblances to the Theadra from the seventies. Biongiorno design.

Maybe someone can recall this better than me. It is is, it got good reviews.




Yes...?? Please do tell more...

Domei arigato!

D
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Old 1st August 2009, 08:49 PM   #17
MaxS is offline MaxS  France
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Wink Is any one get PCB

Hello everyone !

For fun, I'm trying to make a PCB for this solid-state application but as you can suppose there is few sharpness to catch.

For example, when I want to parallel transistors, I can do it correctly for 2 of the 3 pins of them.
Common base and emittor are easy
If I want to keep project simple by using only single sided board, to my mind and at this time, I can't . Well for transistors and PCB gurus all around the board, things like could seems trivial so I'm proud to make them laughing.

So, my question is : Have you got any idea for doing this simply ?

Regards,

MaxS

PS : I'm working on a part of solution. Thanks in advance.
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Old 2nd August 2009, 11:15 AM   #18
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Default SUPRA MM/MC RIAA Head Amp

This circuit are based on Lender's circuit, see
The most linear stage for large voltage swings - Lender's Circuit
a commercial produkt similare to that of elektor is the "SUPA 3.0" from German audio manufactur
http://www.hormann-audio.de/Produkte.htm
certain of interest for users without time for diy. There are also ebay offers, e.g.
http://cgi.ebay.de/ws/eBayISAPI.dll?...fvi%3D1&_rdc=1
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Old 20th August 2009, 08:14 PM   #19
Kay is offline Kay  Germany
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Quote:
I can do it correctly for 2 of the 3 pins of them
many, many years ago,
I do this layout

Maybe it's help
Attached Images
File Type: png Supra_Elektor.png (66.3 KB, 709 views)
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Old 28th August 2009, 11:18 AM   #20
MaxS is offline MaxS  France
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Hello



Kay, this is a really good job. Especially when I compare it with my draft ! Nice work around first stage !




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