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-   -   STK407-050 module alive and kicking (http://www.diyaudio.com/forums/chip-amps/60531-stk407-050-module-alive-kicking.html)

Tekko 10th July 2005 04:23 PM

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 :)
http://user.faktiskt.se/Tekko_Tubeam...p%20module.JPG
http://user.faktiskt.se/Tekko_Tubeam...test%20amp.JPG

And the schemo of the test setup:
http://user.faktiskt.se/Tekko_Tubeam...%20circuit.JPG

To Franz: IŽll get your payment sent as soon as i am on the bank iŽll ask for a exchange to euros.

demogorgon 10th July 2005 06:37 PM

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

TNT 10th July 2005 06:45 PM

Try from here ..
http://user.faktiskt.se/Tekko_Tubeamp/STK407-050/
/

Tekko 10th July 2005 07:55 PM

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.

demogorgon 10th July 2005 11:51 PM

"You don't have permission to access /Tekko_Tubeamp/STK407-050/ on this server."

oh well..

Tekko 11th July 2005 09:12 PM

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:
http://user.faktiskt.se/Tekko_Tubeam...x30w%20amp.JPG
http://user.faktiskt.se/Tekko_Tubeam...s%20needed.JPG
http://user.faktiskt.se/Tekko_Tubeam...starground.JPG

Here the baby is plugged in and working like a charm:
http://user.faktiskt.se/Tekko_Tubeam...ugged%20in.JPG

XELB 11th July 2005 09:48 PM

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 ?

Tekko 12th July 2005 10:51 AM

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: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:
http://user.faktiskt.se/Tekko_Tubeam...ul%20inuti.JPG

Tekko 14th July 2005 08:56 AM

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 ?

XELB 16th July 2005 06:05 PM

Can't see any picture :rolleyes:

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. :dodgy:


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