Have a look at this schematic please

[Groundloops]

I bought an amp at ebay for a few euros. First listening was quite impressive. After replacing the quite poor elytic input caps by 1 uF Wima MKPs it became a lot better. As it seems to be well made (coming with a heavy toroidal transformer and Toshiba 2SA1943 / 2SC5200) i ask for some tweaking suggestions. I was told that there may be circuit parts for CE compliance that may be omitted, but due to my poor knowledge i would like to have someone qualified to look at it.

Hope I´m not boring you with this ...

Thanks so far !

http://www.produktinfo.conrad.com/d...9999/330118-sp-01-en-Hifi_Endstufe_KD_269.pdf

 

[darkfenriz]

V232 (C2383) with no emitter resistor?
strange..

 

[Groundloops]

Errh ... Means what ? Seems I have to get some basic knowledge ...

 

[darkfenriz]

Sorry, just a thought, wrong by the way. R278 (100ohm) acts basically the same as emitter resistor.
I don't see anything around CE stage to be omitted. If one thought about (diamond) buffer between LTP and CE stage-than NO, it must be there, otherwise parameters will degrade tragically.
regards

 

[dimitri]

some tweaking suggestions

please leave it alone, the amp is pretty balanced design

 

[jacco vermeulen]

Impressive, even for 149 Euro at Conrad's.

 

[ilimzn]

A little bit od that the NFB is taken out of the driver stage, I can't see this making any positive difference...