AndrewT said:
Andrew
A friend of mine built the circuit and used it with a Denon DL103 MC cartridge.
Any suggestions?
GD
You'll have to add another stage; split the gain stages. Actually, that stage can be added in front of a regular MM preamp.
Shaun said:
Shaun
Care to post a block diagram of your suggestion?
What if the pre-amp works just like that?
It does. It has an equalisation network. Sorry, I was not thinking. But nevertheless, it should be followed by another stage that excludes the equaliser.
The last time we looked at this circuit, there was another similar one that had an additional op amp for a DC servo. I had ideas of using them together. But I can't seem to find that other circuit right now...
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).
Guys please do notice that by changing R14 to 27E it ups the amplification factor.
For MM it is 270E
D
For MM it is 270E
D
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.
🙂
Maybe someone can recall this better than me. It is is, it got good reviews.
🙂
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.
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.
SUPRA MM/MC RIAA Head Amp
This circuit are based on Lender's circuit, see
http://www.diyaudio.com/forums/showthread.php?threadid=148029
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...96797&_sacat=See-All-Categories&_fvi=1&_rdc=1
This circuit are based on Lender's circuit, see
http://www.diyaudio.com/forums/showthread.php?threadid=148029
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...96797&_sacat=See-All-Categories&_fvi=1&_rdc=1
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