siemens STK050

kmj · 12th August 2006, 09:22 PM

Hi, today I got ahold of four old monoblocks. I bought them for the heatsinks and the toroids but there are some other potential goodies as well. The toroids are supposed to be 2x25VAC and each block has two larger chips (probably bridged) and one output transformer larger than the toroid. I don't know anything about the opts but the chips are called STK050, anyone who knows anthing about them? As I understand they are stereomodules but are they worth saving and are they any good? Outputpower and so on?

Picture of the amps.

Netlist · 12th August 2006, 09:33 PM

Nice find.
STK050 was made by Sanyo, long ago. Google 'STK050 pdf'
I believe far better amps can be made with modern components but they can always be salvaged for a small project.

/Hugo

kmj · 12th August 2006, 09:44 PM

ah, then I'll just scrap the chips since there are the LM-series. Perhaps the output transformers could be usefull in the future, no data on them thou. Each of those blocks are approx 20x30x10cm so they could become some nice gainclones if imagination fails. I bought them togeter with a 4kVA toroidtransformer that I'm planning to use in series with source and preamp (230V and 110V secondaries)

AKN · 12th August 2006, 10:01 PM

Kmj,

If you are going to ditch those STK050 I would be happy to make a deal if possible.

kmj · 13th August 2006, 06:56 AM

4fun
Sure, just drop me an Email and we'll work something out..

kmj · 25th August 2006, 04:56 AM

How about the outputtransformers? Perhaps they can be used for something?

12th August 2006, 09:44 PM	#3
kmj diyAudio Member Join Date: Feb 2004 Location: Falkenberg	ah, then I'll just scrap the chips since there are the LM-series. Perhaps the output transformers could be usefull in the future, no data on them thou. Each of those blocks are approx 20x30x10cm so they could become some nice gainclones if imagination fails. I bought them togeter with a 4kVA toroidtransformer that I'm planning to use in series with source and preamp (230V and 110V secondaries) __________________ .....Where the music comes to die.

12th August 2006, 10:01 PM	#4
AKN Enjoy good sound diyAudio Member Join Date: Aug 2005 Location: In the middle of Sweden	Kmj, If you are going to ditch those STK050 I would be happy to make a deal if possible. __________________ / Anders

13th August 2006, 06:56 AM	#5
kmj diyAudio Member Join Date: Feb 2004 Location: Falkenberg	4fun Sure, just drop me an Email and we'll work something out.. __________________ .....Where the music comes to die.

25th August 2006, 04:56 AM	#6
kmj diyAudio Member Join Date: Feb 2004 Location: Falkenberg	How about the outputtransformers? Perhaps they can be used for something? __________________ .....Where the music comes to die.

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12th August 2006, 09:33 PM	#2
Netlist diyAudio Moderator Join Date: Jan 2003	Nice find. STK050 was made by Sanyo, long ago. Google 'STK050 pdf' I believe far better amps can be made with modern components but they can always be salvaged for a small project. /Hugo

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