i need help for uncle amp

[space2000]

hi,

i want to make power amp for my uncle. i already made syms amp for my own, its sound really great to me. he likes my amp but he wants 150 or 200W Rms into 8 ohms with tight bass. any one have good circuit for it? power transistor must be use 2sc5200-2sa1943

Thank you for your help.

[AndrewT]

I used a Leach clone on 3pair of MJL4301/4281 to get 170W into 8r0 from a 40Vac transformer.
If you use 5200/1943, I would recommend at least 4pair for that PSU voltage.

[space2000]

hi, thanks. do you have any diagram to use 4 pair 2sc5200?

thank you..

[AndrewT]

download the Leach paper on his amplifier.
It will be obvious when you have read it.

[RyanW]

Check out DX Precision I... ~170W and uses 2SC5200's. The thread is here, in Solid State.

You just missed the Groupbuy on the PCB's... Check with Nordic, maybe he made a few spares.

[space2000]

hi, if i add more power transistor on sysasim5 do you think the wats will increase? how about the sound quality?

i need comments on it.

thank you.

[jaycee]

No - the symasym is optimised as it is, and you would have to substitute more powerful transistors in the VAS stage for the symasym to work on higher rails. By the time you are done adjusting it, you will have designed a new power amplifier.

I too would recommend the Leach amp circuit.