BA-3 Amplifier illustrated build guide

[6L6]

I think that will sound absolutely wonderful!!!!

 

[neno70]

hi, i just bought the pcb x BA3 now i found it on ebay
Toshiba Original 2SJ74V / 2SK170V or 2SJ74GR / 2SK170GR Matched, are they okay? thank you😀

 

[6L6]

You want 2SK170BL / 2SJ74BL

eBay sellers alwiet and punkydawgs have genuine parts. Assume all others to be fakes.

 

[neno70]

You want 2SK170BL / 2SJ74BL

eBay sellers alwiet and punkydawgs have genuine parts. Assume all others to be fakes.

yes, I was referring to insertions of alweit 🙂

 

[neno70]

psu cap.

hi, x the psu if I use 8 capacitors from 10000uf 50v, it may be good or too little capacity ??? thank you

 

[coolnose]

Works. Have or buy ?

 

[neno70]

Works. Have or buy ?

I already own 8 x10000uf 50v will be fine????😕

 

[Zen Mod]

on verge of barely enough

make CRC

20mF -0.1R - 20mF

that per rail

 

[coolnose]

I just went back a couple of pages in this thread: if you have build that speakers and plan 2 monoblocks, please invest a couple of bucks more and make a proper supply...

ZM on the right pass again

 

[neno70]

on verge of barely enough

make CRC

20mF -0.1R - 20mF

that per rail

ok, then I buy 8 new 18000uf 50v capacitors as used in the 6L6 guide .. thank you

 

[neno70]

hi 6L6 I am mounting my scheche following your guide but, I have two questions; first, the small electrolytic c3 on the board BA-3 MUST BE MOUNTED OR NO? , ACCORDING TO THE QUESTION, I CAN NOT SEE HOW TO CONNECT THE CABLES TO THE BA-3 CARD. YOU CAN PROVIDE LITTLE SPLIT TO THE REGION .. thanks 🙂

 

[6L6]

The small c3 is a location provided if you choose to use an electrolytic capacitor. You do not need to use it and the other location.

What connections are you not understanding?

 

[neno70]

The small c3 is a location provided if you choose to use an electrolytic capacitor. You do not need to use it and the other location.

What connections are you not understanding?

hi 6L6, x cable connections, now everything is clear to me. But x the chassic ai used a 5Ux400 or 5Ux300? x the PSU not used snubber?🙂

 

[6L6]

I used a 5U 400mm because I had one on hand. You could use a 4U as well.

Do not use snubber.

 

[neno70]

I used a 5U 400mm because I had one on hand. You could use a 4U as well.

Do not use snubber.

5Ux300 ?
and too small to dispel the heat ??

 

[indra1]

... Do not use snubber.

Any problem?

 

[neno70]

hi, x the mosfet, I bought vishay. now x p1 and p2 what value do you recommend me: 1k ?? thank you

 

[Dennis Hui]

hi, x the mosfet, I bought vishay. now x p1 and p2 what value do you recommend me: 1k ?? thank you

Which Vishay part? IRF610/IRF9610?

If so, I would go with 1K for P1 and P2.

 

[neno70]

Which Vishay part? IRF610/IRF9610?

If so, I would go with 1K for P1 and P2.

IRFP240 and 6xIRFP9240

 

[6L6]

IRFP240/9240 are standard output devices.

In this schematic P101 should be 5k (as shown). To give extra adjustment range R125 decrease to 12K, P102 should be increased to 5K.


On the input board, use 1K pots for P1 P2