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Old 10th July 2005, 04:23 PM   #1
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Smile STK407-050 module alive and kicking

Hello diyers!

This is actually not a chip amp, inside these modules there is a small circuit board with SMT components, transistors, resistors and caps. This will make Franz G happy to see. Tho i feel bad that i have been unable to send him his 10 euro for the shipping

Here she is in test bench and going strong
Click the image to open in full size.
Click the image to open in full size.

And the schemo of the test setup:
Click the image to open in full size.

To Franz: IŽll get your payment sent as soon as i am on the bank iŽll ask for a exchange to euros.
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Old 10th July 2005, 06:37 PM   #2
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tekko, i guess were both culprits, i never mailed him the postage money either.

btw, thise pic's are forbidden?
i dont have access to them.

-Marius
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Old 10th July 2005, 06:45 PM   #3
TNT is offline TNT  Sweden
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Try from here ..
http://user.faktiskt.se/Tekko_Tubeamp/STK407-050/
/
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Old 10th July 2005, 07:55 PM   #4
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These modules sounds really darn good. I changed the module in a amp i had that was a 4132II which had 1%THD to a 5151V that has a THD of 0.08% and slightly higher power, tho the transformer cant cope with that 10w higher power but iŽll never be at that level anyway.
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Old 10th July 2005, 11:51 PM   #5
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"You don't have permission to access /Tekko_Tubeamp/STK407-050/ on this server."

oh well..
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Old 11th July 2005, 09:12 PM   #6
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Default The real thing

NOW i have built the real thing on a board, it took about seven hours to do. I noticed i forgot the zobel link when i hooked it up so i have to solder those on tomorrow.

Heres some pics:
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.

Here the baby is plugged in and working like a charm:
Click the image to open in full size.
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Old 11th July 2005, 09:48 PM   #7
XELB is offline XELB  Portugal
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I can't see any picture


BTW, what is the gain of the amp ? Did you use the 50x that is normally recommended in the schematic ?
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Old 12th July 2005, 10:51 AM   #8
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If the pics arent working, try right click and click on show picture.

This amp sounds really good and doesent even get warm, tho the transformer i use (from a home cinema receiver) gets honking hot Its a 450-500VA unit and its set for 240vac in.

A pic of one of these modules inside for those who is interested:
Click the image to open in full size.
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Old 14th July 2005, 08:56 AM   #9
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How inportant is the voltage rating on a cap ? I noticed im exceeding the max of 35v om the preamp caps on this amp with one volt, they dont get hot but will it degrade them over time ?
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Old 16th July 2005, 06:05 PM   #10
XELB is offline XELB  Portugal
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Can't see any picture

Maybe it's due to the pictures names... I can't see(open) directly in the forum.
To see them, I must copy the picture url and open in a new window.
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