AlephJ Mimi! (Mini)

[didiet78]

You can print pdf file 1:1 its 170mm betwen center hole mosfet/ betwen drain pins

 

[lykkedk]

You can print pdf file 1:1 its 170mm betwen center hole mosfet/ betwen drain pins

Thanks...

Perfect...

Will reply later regarding some other small things

Jesper.

 

[lykkedk]

looking at that schematic :

- remove R8'
-remove R27B, use R27 and R27A
-put R7 and R7' in series in drain

Hey.

If we look at post #35+#36, i would like to know, what the meaning was with R8 trimpot. ? -I am in no doubt that it could be left out as ZM say's, but i sure would like to know, what it does excatly ?

Jesper.

 

[didiet78]

Set ccs for ltp.

 

[lykkedk]

Thanks pal

Didiet, is it possible to avoid running the trace between the legs of C3 ?

It's because it is a bit tricky, when doing the pcb by "hand"!

Also i did f**k up, when i meassured my distance between the mounting holes of the mosfets... The right distance is 180mm. ... Sorry, i was to fast...

Can you correct this?

Jesper.

 

[didiet78]

add jumper

 

[lykkedk]

add jumper

Hello didiet

Glad you help, and are willing to correct pcb, for my build.

I just found another thing. -If you look carefully at the 2sj74, trace are running through legs there ... Can you avoid that too?

Also i got some 2sj109V, i would like to use instead of 2pcs. 2sj74 (I actually used 2sj109V in my original AlephJ build, and they are working (2sj109 are 10-20mA chips)... The footprint of 2sj109, are capable of holding 2pcs. 2sj74 if legs are bend a little for making them face eachother.

Can you make footprint for 2sj109V ???

Regards and good day here; Jesper.

 

[dungdochi1978]

add jumper

Did you have sprint lay out file ? to mod

 

[didiet78]

Like this ?

 

[lykkedk]

Like this ?

Yes yes yes

Can you mark GDS on that 2sj109 ???

Perfect

Jesper.

 

[didiet78]

Marking

 

[lykkedk]

Hi. and thanks again didiet... cool job you did!

So i have collected all here, in this post.

ZM is there any consideration, if i use 2sj109V (10-20mA), or should i just try the values allready posted in this schematic attached here.

I will try to make the PCB at the end of the week. Maybee stuffing it up next week? Making it a proto, but neat in case everything is working and stable! -I think for me it's easier than doing a proto on a veroboard or like.

Jesper.

 

[Zen Mod]

you're good with 2SJ109V , it's biased with CCS , so higher Idss really is not important

values are good

 

[lykkedk]

you're good with 2SJ109V , it's biased with CCS , so higher Idss really is not important

values are good

So here we go

Jesper.

 

[dungdochi1978]

Like this ?

I mean sprint layout file. which soft ware you use to draw it?
can you share it?

 

[didiet78]

I mean sprint layout file. which soft ware you use to draw it?
can you share it?

I use Eagle. I just share what i want to share

 

[dungdochi1978]

I use Eagle. I just share what i want to share

Ah .you can keep it for your self. diffirent , I use sprint lay out.

 

[lykkedk]

So... i got some time today.

Etching went good!

Jesper.

 

[2 picoDumbs]

Very nice.

 

[didiet78]

Wooow old school.