SLN Pre-Amp - Elektor Aug 1982 - Page 2

Shaun · 24th April 2008, 09:07 AM

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).

GlidingDutchman · 24th April 2008, 10:18 AM

Guys please do notice that by changing R14 to 27E it ups the amplification factor.

For MM it is 270E

D

AndrewT · 24th April 2008, 10:35 AM

Quote:

Originally posted by AndrewT
+55db of gain from an LTP+VAS single stage amp sounds quite ambitious.

have you got the message yet?

GlidingDutchman · 24th April 2008, 10:44 AM

Quote:

Originally posted by AndrewT

have you got the message yet?

No need to get excited man!

Okay... I get the message...!

Bonsai · 24th April 2008, 12:53 PM

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.

GlidingDutchman · 24th April 2008, 01:00 PM

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

MaxS · 1st August 2009, 08:49 PM

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.

tiefbassuebertr · 2nd August 2009, 11:15 AM

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

Kay · 20th August 2009, 08:14 PM

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

MaxS · 28th August 2009, 11:18 AM

Hello

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

MaxS

24th April 2008, 12:53 PM	#15
Bonsai diyAudio Member Join Date: Aug 2006 Location: Taipei, Taiwan	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. __________________ bonsai http://www.hifisonix.com/

1st August 2009, 08:49 PM	#17
MaxS diyAudio Member Join Date: Mar 2006 Location: France	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. __________________ Ca marche pas ! Tu ne l' as pas branché non plus ....

2nd August 2009, 11:15 AM	#18
tiefbassuebertr diyAudio Member Join Date: Jul 2005 Location: D-55629 Schwarzerden	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

28th August 2009, 11:18 AM	#20
MaxS diyAudio Member Join Date: Mar 2006 Location: France	Hello Kay, this is a really good job. Especially when I compare it with my draft ! Nice work around first stage ! MaxS __________________ Ca marche pas ! Tu ne l' as pas branché non plus ....

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24th April 2008, 10:18 AM	#12
GlidingDutchman diyAudio Member Join Date: Nov 2007	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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