SLN Pre-Amp - Elektor Aug 1982

[GlidingDutchman]

I want to attempt building this phono pre-amp (see attached schem).

Any tips and ideas on how to possibly improve the circuit?

I am going to configue it for MC cartridges.

[Shaun]

Hi GD

Isn't that a MC circuit?

[GlidingDutchman]

Originally posted by Shaun
Hi GD

Isn't that a MC circuit?

Hi Shaun

It is switchable... by changing two resistors... R1 & R14

GD

[AndrewT]

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

[GlidingDutchman]

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

Andrew

A friend of mine built the circuit and used it with a Denon DL103 MC cartridge.

Any suggestions?

GD

[Shaun]

You'll have to add another stage; split the gain stages. Actually, that stage can be added in front of a regular MM preamp.

[GlidingDutchman]

Originally posted by Shaun
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

Care to post a block diagram of your suggestion?

What if the pre-amp works just like that?

[Shaun]

Originally posted by GlidingDutchman
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.

[Shaun]

Originally posted by GlidingDutchman
Care to post a block diagram of your suggestion

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...

[GlidingDutchman]

Originally posted by Shaun


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.

Another full stage sans RIAA?