Hi Marc,
Very artistic! My wife even liked them!
@ LC, AWW! I'm looking forward to your report on the sound quality!
hehe Harry, they never stopped to surprise us
Yes artistic experimental work, that's what I like the most in our DIY activities.
P.S. How's your VSSA standing?
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It will take a little more time, i am always waiting Sanken and VAS devices. BG1_bjt will run on the +/-36V test chassis (sheet of wood with complete power supply, soft-start, DC-speaker protection). I just have to swap heatsink who has amp-board on and to connect supply to make it running. I will take few picture tomorrow.
Final building wil integrate PMI capacitance multiplier and monobloc configuration.
Marc
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hehe Harry, they never stopped to surprise us
Yes artistic experimental work, that's what I like the most in our DIY activities.
P.S. How's your VSSA standing?
That's for me the better "engine" for diy....If i say you that i have no more fun in getting together your VSSA module....all work is done....For sure do the expect result i'll do it...but for sure too if result is as magic as i read....i will build my diy single layer ALF16NP05 layout...It's waiting frendly in my computer for printer outpout.....and waiting Farnell availability....
Marc
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If you are going to use caps next to the o/p transistors put them as close as possible to o/p devices anyway (example bellow).
For one pair of hexfets I didnt used any source resistors ( i know that the are recommended) and results were perfect.
I have measured DF of latfet version and at 8R 100Hz it was 735 so I think is very good.
After I come back from my holidays I will try to mesure BJT and FET-hex version too
For one pair of hexfets I didnt used any source resistors ( i know that the are recommended) and results were perfect.
I have measured DF of latfet version and at 8R 100Hz it was 735 so I think is very good.
After I come back from my holidays I will try to mesure BJT and FET-hex version too
Attachments
My PCB version VSSA BJT, double sided without metallization:
Not tested, it will be soon.
An externally hosted image should be here but it was not working when we last tested it.
Not tested, it will be soon.
Looks like a very good component placement, but the grey-on-grey layout is hard to see. Looking forward to more pics...
MJL4281/4302 one of the best ON Semi BJT, I used those and other MJL or MJW but these are my favorite.
It would be good to know how will measure up with the Sankens.
Greetings G
MJL4281/4302 one of the best ON Semi BJT, I used those and other MJL or MJW but these are my favorite.
It would be good to know how will measure up with the Sankens.
Greetings G
I have five each...If sanken take too long time maybe will i try with these since i have no projet on them.
Marc
Attachments
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That's a work of art, Marc! If I could do that, I might not bother having them "professionally" made...
Hi Pete,
"having them pofessionnaly made" has some advantages...I really hate the drilling PCB session for exemple...or having metallized drill made under PCB transistor soldering easyer.....but desoldering not....
Marc
Really neat job...Why the output coil? have you encounter issue with stability?
IRF640/9640 => Headphone amp???
Marc
