Have a look at this schematic please

Groundloops · 10th August 2005, 09:36 AM

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/da...ufe_KD_269.pdf

darkfenriz · 10th August 2005, 09:51 AM

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

Groundloops · 10th August 2005, 09:53 AM

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

darkfenriz · 10th August 2005, 10:37 AM

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 · 10th August 2005, 01:08 PM

Quote:

some tweaking suggestions

please leave it alone, the amp is pretty balanced design

jacco vermeulen · 10th August 2005, 01:19 PM

Impressive, even for 149 Euro at Conrad's.

ilimzn · 10th August 2005, 04:25 PM

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

10th August 2005, 09:36 AM	#1
Groundloops I´m amazed! diyAudio Member Join Date: May 2004 Location: Hamburg / Northern Germany	Have a look at this schematic please 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/da...ufe_KD_269.pdf

10th August 2005, 01:19 PM	#6
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	Impressive, even for 149 Euro at Conrad's. __________________ Looks like Sponge Bob has killed another thread.

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10th August 2005, 09:51 AM	#2
darkfenriz diyAudio Member Join Date: Jun 2004 Location: Warsaw	V232 (C2383) with no emitter resistor? strange..

10th August 2005, 09:53 AM	#3
Groundloops I´m amazed! diyAudio Member Join Date: May 2004 Location: Hamburg / Northern Germany	Errh ... Means what ? Seems I have to get some basic knowledge ...

10th August 2005, 10:37 AM	#4
darkfenriz diyAudio Member Join Date: Jun 2004 Location: Warsaw	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

10th August 2005, 04:25 PM	#7
ilimzn diyAudio Member Join Date: Feb 2005 Location: Zagreb	A little bit od that the NFB is taken out of the driver stage, I can't see this making any positive difference...

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