Little fet preamp

[00940]

I found this little preamp on this website : http://michel.burdin.online.fr/zen.htm#PAFET



it's a slightly modified version of a preamp published in "la nouvelle electronique n°2". Author claims that performance is close to a BOZ. Consumption is about 100mA for both channels.

Any comment on this one ? I'm planning to put it inside a philips cd753, to get a decent variable output.

[Richard C]

Looks like it's designed for a certain sound due to its relatively bendy transfer characteristic. Might sound 'nice' though.

[00940]

You see any way to improve it ?

I've been adviced on another board to scrap C21 and C22

[00940]

allright, I've been also told the contrary with better arguments

[Richard C]

Yes, you certainly need those coupling caps.

Improvements; well not really, it is what it is. If you want better linearity then an entirely different design is required.

If you do build it make sure you use a well regulated power supply.

[Devil_H@ck]

This might be a stupid question, but don't you need a negative supply voltage too?

[Richard C]

C36 enables both negative and positive output voltage swing from a single rail supply.

[Devil_H@ck]

Ah, ok, thanks !