I have a commercial phono pre which one is suitable for MM and MC. I don't use MC and never will. In the first stage there is an OP37G used. For my own reasons i want to use a 5534. I am a fan of these with MM and have different brands.
But can i drop in the 5534 with no problems for the op37? In the rest of the cirquit one opamp is used for Riaa and one for IV with pot resistor for offset.
And if so, can i get away with no compensaton cap? What will be the gain of this stage, the 5534 is stable until 3x with no external cap.
But can i drop in the 5534 with no problems for the op37? In the rest of the cirquit one opamp is used for Riaa and one for IV with pot resistor for offset.
And if so, can i get away with no compensaton cap? What will be the gain of this stage, the 5534 is stable until 3x with no external cap.
Attachments
Its not clear what the noise-gain of that circuit is due to the transistors (there is an attenuation network, then the gain of the diff pair - the combined effect of these two is what sets the noise gain seen by the opamp). Probably wise to assume compensation may be needed.
The OP37G and NE5534A are very similar in specs otherwise.
The OP37G and NE5534A are very similar in specs otherwise.