Aleph J Schematic

Blues-

If I design a ckt board would etch one for me?

I have recently come to learn that etching a pcb is one of the easier things to do around here.

If you can handdraw it, then scan it into the computer. Use a laser printer to print it on glossy photopaper. Iron it onto your copper clad board, then remove the paper and etch in muriatic acid available at the local hardware store. This is the basic simple process which I have condensed from Tom Gootee's website. It is much easier than, say, getting Jacco to be serious, but not quite as easy as matching bipolar transistors!

I have started working on an aleph PCB, but it will be for a cascoded J-fet.

JJ
 
Aleph J PCB? Here ya go.
Board measures 80x100 mm, single sided, no wires. It's exactly Papa's schematic, I only left out the input coupling cap (1µ) for greater flexibility.
Comments welcome.
 

Attachments

  • aj_pcb1.gif
    aj_pcb1.gif
    24.2 KB · Views: 2,496
Official Court Jester
Joined 2003
Paid Member
HBarske said:

Good hint, thx Choky. U're right, dissipates >300 mW.


if you ask me - I'll stick with two bjt CCS , even if Papa choose simpler one ;

besides better temp. behavior of two bjt version , comparing it with one bjt version, one issue is certainly important - thurn on thump must be greater - look at 10uF across zenner .

maybe I'm wrong , maybe I'm not ;

in any case - I'm sure that Papa's schematic is good enough , as always :D