100w Stk

nbcd · 1st September 2004, 08:25 AM

are there any STK devices that can deliver 100W power. I searched the net but didn't find any. If you have a code of this devices , or any link to ther datasheet and a aplication schematic , please post it here
Best regards!!

MikeB · 1st September 2004, 11:54 AM

hmm, maybe you should ask this in the chipamp-forum ?

DigitalJunkie · 1st September 2004, 12:45 PM

STK419-150 is said to do about 150W x2 peak.
I don't know if these modules are even made anymore,as I couldn't find *anything* on the web about them.
I happen to have one,that was pulled from a dead Aiwa bookshelf system (the amp still worked however.) and I've been slowly trying to reverse-engineer the circuit,for the heck of it. A datasheet would be great,but I'm not sure one was ever even made for this module?! (Does anybody have one they'd be kind enough to send me?

)

MikeB · 1st September 2004, 01:03 PM

Its not a "STK" but will do the job:

http://www.st.com/stonline/books/pdf/docs/6744.pdf

Mike

tawen_mei · 11th March 2005, 07:41 AM

They are on Sanyo's website:

http://service.semic.sanyo.co.jp/sem...oducts+preview

jaycee · 11th March 2005, 10:05 AM

Search the web and you'll find out pretty much anything about the STK amplifier modules. Be warned though, most if not all of them are obsolete.

As for internal construction they're all pretty simple - they're a basic Lin design with a quasi complementary output and a current source for the VAS. Some of them (mostly the later, higher grade devices) employ a cascode for the VAS and an EF output.

Szaflik · 11th March 2005, 10:12 PM

STK 4241 - 120W / 8 ohm STEREO

Jim Karr · 11th March 2005, 10:42 PM

I just ordered STK084 from MCM in Ohio. 50watts, each chip is one channel. Uses 9 out of 10 leads. Simple amp to build, don't even have to make a pc board.

MCM charged about $13 each.

sam9 · 12th March 2005, 12:59 AM

Before anyone gets too excited about thw 100W figure, llok at the THD vs. power charts on the datasheet. Even if you think THD is meaningless, reading off the figure at the 100W intersection of the curve may give you pause. It might be better to regard it as "50W with some headroom".

Stocker · 12th March 2005, 01:47 AM

Indeed. STK chips are rated funny. The datasheet I have for some STK402-040 (IIRC) has a power rating about 0.6 or 0.75x the "quoted" power, with a low distortion number, and then the full power rating with a significantly higher distortion number.

Of course, the chips also sit within a couple mV of 60mVDC each also...

1st September 2004, 08:25 AM	#1
nbcd diyAudio Member Join Date: Apr 2003 Location: suceava	100w Stk are there any STK devices that can deliver 100W power. I searched the net but didn't find any. If you have a code of this devices , or any link to ther datasheet and a aplication schematic , please post it here Best regards!! __________________ eugen

11th March 2005, 10:42 PM	#8
Jim Karr diyAudio Member Join Date: May 2004 Location: Southwest Michigan	stk outputs I just ordered STK084 from MCM in Ohio. 50watts, each chip is one channel. Uses 9 out of 10 leads. Simple amp to build, don't even have to make a pc board. MCM charged about $13 each. __________________ As for me and my household, we shall serve the Lord. Joshua

12th March 2005, 01:47 AM	#10
Stocker diyAudio Member Join Date: Dec 2003 Location: Austin	Indeed. STK chips are rated funny. The datasheet I have for some STK402-040 (IIRC) has a power rating about 0.6 or 0.75x the "quoted" power, with a low distortion number, and then the full power rating with a significantly higher distortion number. Of course, the chips also sit within a couple mV of 60mVDC each also... __________________ Jesus loves you.

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1st September 2004, 11:54 AM	#2
MikeB diyAudio Member Join Date: Apr 2004 Location: Gütersloh	hmm, maybe you should ask this in the chipamp-forum ?

1st September 2004, 12:45 PM	#3
DigitalJunkie diyAudio Member Join Date: Apr 2003 Location: Portland,Oregon Blog Entries: 3	STK419-150 is said to do about 150W x2 peak. I don't know if these modules are even made anymore,as I couldn't find anything on the web about them. I happen to have one,that was pulled from a dead Aiwa bookshelf system (the amp still worked however.) and I've been slowly trying to reverse-engineer the circuit,for the heck of it. A datasheet would be great,but I'm not sure one was ever even made for this module?! (Does anybody have one they'd be kind enough to send me? )

1st September 2004, 01:03 PM	#4
MikeB diyAudio Member Join Date: Apr 2004 Location: Gütersloh	Its not a "STK" but will do the job: http://www.st.com/stonline/books/pdf/docs/6744.pdf Mike

11th March 2005, 07:41 AM	#5
tawen_mei diyAudio Member Join Date: Jan 2005 Location: California Republic	They are on Sanyo's website: http://service.semic.sanyo.co.jp/sem...oducts+preview

11th March 2005, 10:05 AM	#6
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	Search the web and you'll find out pretty much anything about the STK amplifier modules. Be warned though, most if not all of them are obsolete. As for internal construction they're all pretty simple - they're a basic Lin design with a quasi complementary output and a current source for the VAS. Some of them (mostly the later, higher grade devices) employ a cascode for the VAS and an EF output.

11th March 2005, 10:12 PM	#7
Szaflik diyAudio Member Join Date: Nov 2003 Location: Poland	STK 4241 - 120W / 8 ohm STEREO

12th March 2005, 12:59 AM	#9
sam9 diyAudio Member Join Date: Jun 2002 Location: Left Coast	Before anyone gets too excited about thw 100W figure, llok at the THD vs. power charts on the datasheet. Even if you think THD is meaningless, reading off the figure at the 100W intersection of the curve may give you pause. It might be better to regard it as "50W with some headroom".

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