mr l3ct3r pre amp

[MaheshSK]

 can any one please make a vero layout for it.. Pcb is a bit though...

[ξεναγος νεκροπολης]

hi! i drew up one layout but it came out 25x26 with lots of empty spots on the board...and that's why i don't like it very much and tomorrow i'll try to find a better way to place components on the board!hope you're not in hurry!

[MaheshSK]

not in a hurry take your own time... no problems if its big.. not looking for a pedal format... preamp for a amp project is what am looking for...

[ξεναγος νεκροπολης]

here you go man!
i managed to bring it down to 26x18.this was one of the most difficult i've ever drew.
read the notes!!!!

also i'll drop a question in open chat to find out what we should read to bias the j-fets cause i'm not sure.
i believe it will work just fine...it took me 4 hours...and i want to build it too!!!

hector.pdf

[MaheshSK]

Thanks man.. I'll moat probably start building this weekend itself... will post the details.... do tell me details of your build too...

[ξεναγος νεκροπολης]

just hold on for a couple of days cause Frank said( in open chat) that the schematic you've posted might have mistakes.i'll do a little research tomorrow, and i'll let you know if we should change something.

[MaheshSK]

K man.. I took it from that same page.. I also looked at  this page too.. http://www.diystompboxes.com/smfforum/index.php?topic=104529.0 do take a look..

[ξεναγος νεκροπολης]

hi man.
i've read a lot on that, and jokerx says that it's verified. he uses a pot in place of the switch though. and he uses 250k for gain.these are the differences with my layout.
with the vht pitbull now, there are some differences  that i could do easily in my board i believe.
i don't know...maybe we should build it and see...i'll start in the next days.i work a lot lately so no much time for building..hope by sunday i'll have a report!

[Frank_NH]

Hmmm.   After looking at the DIYStompboxes post, it looks like the 27K source resistor for R16 is OK.  But my calculations indicate that you need a 250K or 500K trimmer to bias a J201.  Well, you can prototype it and decide what to use there...

[MaheshSK]

One more thing i'll be using bf245C in place of
j201. i can't find the normal substitutes either.