clone conrad johnson evolution 2000

[margannai]

It's been over 25 years since I built this wonderful amplifier in 1992. I was 25, and I certainly could not buy the original. A great hybrid, without any negative global negative feedback. In this period I'm updating with better components than 25 years ago. Mundorf filter capacitors, transformers rewind by an Italian specialized audio company. The sore point is the mosfet. I used, i j 2sk1058 and 2sj162 hitachi. (originals are k135 j50) What do you think if I replace with the exicon ECX10N20 and ECX10P20 mosfets.
Are they better than 1058 j162? Thank you.

 

[RobertS61]

Hi Margannai,

Can't help you out here but I also coveted this amp from CJ in the beginning of the nineties.
Have only the EVO20se pre.
Apart from the schematics which I thank you for posting, do you have the accompanying parts list also by any chance?

Thanks Robert

 

[margannai]

Hi Margannai,

Can't help you out here but I also coveted this amp from CJ in the beginning of the nineties.
Have only the EVO20se pre.
Apart from the schematics which I thank you for posting, do you have the accompanying parts list also by any chance?

Thanks Robert

Hi Robert, do not understand what you're asking. The list of components list is present. Voltage output transformers value?
Hello.

 

[RobertS61]

I'm sorry you're right in this case.
The list of components is present as you said.

 

[analog_sa]

What do you think if I replace with the exicon ECX10N20 and ECX10P20 mosfets.
Are they better than 1058 j162? Thank you.

Are they not pretty much the same? Don't see much point in replacing those.

The coupling caps (0.15uF) are of course critical. What do you intend to use?

 

[RobertS61]

Are they not pretty much the same? Don't see much point in replacing those.

The coupling caps (0.15uF) are of course critical. What do you intend to use?

.15uF versions of these:

 

[margannai]

Now I've heard so many amplifiers, valves and not, sakuma, 211 or 845, single end, push pull, but this conrad ev2000, is unbeatable. It has everything the valves and transistors can give you. Did you build it? Used is not found. Who's got it, keeps it tight.