AB100 Class AB Power Amplifier

[Bigun]

nice board.

 

[osscar]

Tnx Prasi for nice board, in NP original board R35 was omitted, maybe you can consider the input C to be film cap - 2uf2 or 3uf3? and maybe use some to 126 for bias generator ? nice board anyway.tnx.

 

[Cambe]

Prasi,

Very nice work. Great looking PCB.

 

[nfsgame]

Tnx Prasi for nice board, in NP original board R35 was omitted, maybe you can consider the input C to be film cap - 2uf2 or 3uf3? and maybe use some to 126 for bias generator ? nice board anyway.tnx.

That would be really great. Both suggestions... And maybe allow the 100uF-caps to be 12,5mm in diameter so that they could be my favorites (UBX as polarized and UES or RFS in feedback). Thanks for the board anyway !

Edit says they're in 13mm already as it's printed on the board. Sorry, I should have put my glasses on .

 

[osscar]

In my "cave man" diy AB 100 pcb i also bypassed all el. capacitors with the film ones

 

[nfsgame]

Four pads for decoupling-caps as in the original version would also be nice. The board is only ~20cm long by now. There is space for something more in the dissipante-cases .

 

[twitchie]

Fugly for sure!!! Well done!

 

[prasi]

Thank you all, would a BD139 be adequate in the bias generator place from voltage point of view? OR do we need to use something like KSC part?

 

[osscar]

Bd will fine

 

[prasi]

Here are 2 versions with 4 caps and 2 caps.
In both also included upto 15mm pitch film cap and TO-126 transistor for bias.

I will post gerbers and pdfs here if there are no more comments.

regards
prasi

 

[osscar]

nice board again prasi,tnx

 

[prasi]

Thanks osscar,
here are all the files...

regards
prasi

 

[Dennis Hui]

Very nice Prasi! Thank you for sharing that with us.

 

[Cambe]

Papa Pass ,Prasi and community.

Thanks.

 

[nfsgame]

Thank you very much prasi!

 

[prasi]

I made some 3-D's just for illustration.

 

[wtnh]

BPR56N 1 Ohm?

Anybody know of a source for BPR56N 1 Ohm resistors? Digikey and Mouser don't seem to carry them and Chinese suppliers on eBay only seem to have up to .5 Ohm. Lots of examples of .1, .22, .33, etc.

 

[prasi]

they seem to be in stock on mouser...
BPR58CF1R0J KOA Speer | Mouser India

BPR58C1R0J KOA Speer | Mouser India

cheaper option,
10pcs 5W 0.05 0.47 0.047 0.027 1 2 ohm 0.47R 0.05R 1R 2R 0.047R 0.027R Non inductive Cement Resistor Resistance 5%|Resistors|Electronic Components & Supplies - AliExpress

 

[adiaz]

Thanks for the work.

Could you include a gerber file to view it on kicad?

 

[prasi]

post # 812 on this page?