STK407-050 module alive and kicking

Tekko · 10th July 2005, 04:23 PM

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

And the schemo of the test setup:

To Franz: I´ll get your payment sent as soon as i am on the bank i´ll 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 i´ll 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

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:

Here the baby is plugged in and working like a charm:

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

Its a 450-500VA unit and its set for 240vac in.

A pic of one of these modules inside for those who is interested:

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

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.

10th July 2005, 04:23 PM	#1
Tekko diyAudio Member Join Date: Jan 2005	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 And the schemo of the test setup: To Franz: I´ll get your payment sent as soon as i am on the bank i´ll ask for a exchange to euros.

11th July 2005, 09:12 PM	#6
Tekko diyAudio Member Join Date: Jan 2005	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: Here the baby is plugged in and working like a charm:

11th July 2005, 09:48 PM	#7
XELB diyAudio Member Join Date: Dec 2004 Location: Lisboa	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 ? __________________ If you want power you must add control

16th July 2005, 06:05 PM	#10
XELB diyAudio Member Join Date: Dec 2004 Location: Lisboa	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. __________________ If you want power you must add control

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10th July 2005, 06:37 PM	#2
demogorgon diyAudio Member Join Date: Jul 2004 Location: Behind you.	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

10th July 2005, 06:45 PM	#3
TNT diyAudio Member Join Date: Apr 2003 Location: Sweden	Try from here .. http://user.faktiskt.se/Tekko_Tubeamp/STK407-050/ /

10th July 2005, 07:55 PM	#4
Tekko diyAudio Member Join Date: Jan 2005	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 i´ll never be at that level anyway.

10th July 2005, 11:51 PM	#5
demogorgon diyAudio Member Join Date: Jul 2004 Location: Behind you.	"You don't have permission to access /Tekko_Tubeamp/STK407-050/ on this server." oh well..

12th July 2005, 10:51 AM	#8
Tekko diyAudio Member Join Date: Jan 2005	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:

14th July 2005, 08:56 AM	#9
Tekko diyAudio Member Join Date: Jan 2005	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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