Blues-
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
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
Seriously, i've got a old flatbed plotter that puts the artyfarty straight on the clad boards, no need for paperwork.
Me missess found it in the dumpster, with ~50 plotter ink pens.
Me missess found it in the dumpster, with ~50 plotter ink pens.
jacco vermeulen said:
now you dreking our master disaster chief mod
, too........
cheese ..........
Quite late…
Thanks Nelson for sharing with us; we will add this beauty to our collection also.
So many options… so little time…
😎
Thanks Nelson for sharing with us; we will add this beauty to our collection also.
So many options… so little time…
😎
The lack of one 22.1k resistor?
Hi !
Don't You think there is a lack of one 22.1k resistor connected between R3-C1 and the ground (as in usual aleph way of feedback net) ?
Hi !
Don't You think there is a lack of one 22.1k resistor connected between R3-C1 and the ground (as in usual aleph way of feedback net) ?
Re: The lack of one 22.1k resistor?
that's R3 .
think ................. XLR ...............
Voodoo..........
xymox said:
that's R3 .
think ................. XLR ...............
Voodoo..........
Babowana said:
You don't need to worry about.
But, not me . . .
Baobabo ........ you're emotional again...........
Lovan said:
I seem to remember someone selling something similar a while back, what was it..... Babble-something....?
mpmarino said:
I seem to remember someone selling something similar a while back, what was it..... Babble-something....?
but that was "pizza & beer" (ad)venture , not a group buy ........
A list of changes to the BrianGT Mini-A boards would be cool...if you could even convert a Mini-A into a mini AJ. I dunno.
A piggy-back board is only needed for aesthetic reasons because of J vs MOS pinouts...if you're ready to twist and shout, you get an instant AJ.
HBarske said:
I like it 😉
if you wanna use small MF resistors , make R5 from two in series ;
dissipation issue
HBarske said:
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 😀