well ...... seems ages ago ,buried in some obscure DiyA Pass thread , after few quickie (on back of napkin) modifications of XYWZwhatever BOSOZ , my budy Lucky Luke (AKA steen) , demanded one little preamp with balls ....
few posts later , LL have some ideas about topology, perfectly good for me , just because I'm good at paper (napkin) and hand calc almost as he is good in making amps ........
little later - I already have some quickie quickie drawn , but somewhat flipped in regard to LL's idea,with added output stage(s) etc.
main reason why I flipped it is because I feel ( well - I rarely think,anyway) that's smart to use some non-audio-fancy-schmanzy Jfet , which is easy to find in near tobacco store, with all other parts .....
well - result is here (lookie lookie schmtc)
crazy process of
delivery is also crazy documented in THIS
thread .........
I can just say tnx to entire OFF TOPIC MOB , just because they make my life miserable with regular questions "will it drive F4 " etc .
anyway ......... for first post is 'nuff
schematic:
(next post -The Shunty)...........
EDIT BY MODERATORS:
With Choky's permission, I have created a new thread the is the same as this thread but with almost all Off Topic posts removed for easy reading by those making the project.
http://www.diyaudio.com/forums/showthread.php?s=&threadid=119070
The new thread is closed and possibly won't be updated, so members should keep checking back here for latest info and amusement
Variac
END EDIT
few posts later , LL have some ideas about topology, perfectly good for me , just because I'm good at paper (napkin) and hand calc almost as he is good in making amps ........
little later - I already have some quickie quickie drawn , but somewhat flipped in regard to LL's idea,with added output stage(s) etc.
main reason why I flipped it is because I feel ( well - I rarely think,anyway) that's smart to use some non-audio-fancy-schmanzy Jfet , which is easy to find in near tobacco store, with all other parts .....
well - result is here (lookie lookie schmtc)
crazy process of
delivery is also crazy documented in THISthread .........
I can just say tnx to entire OFF TOPIC MOB , just because they make my life miserable with regular questions "will it drive F4 " etc .
anyway ......... for first post is 'nuff
schematic:
(next post -The Shunty)...........
EDIT BY MODERATORS:
With Choky's permission, I have created a new thread the is the same as this thread but with almost all Off Topic posts removed for easy reading by those making the project.
http://www.diyaudio.com/forums/showthread.php?s=&threadid=119070
The new thread is closed and possibly won't be updated, so members should keep checking back here for latest info and amusement
Variac
END EDIT
setup in my livingroom... Swinging so easily 40v with 1,8 on input !!!Thank's for all the help ZenMod... Maybee it will be a while before finishing it up...
I made a
from scratch, designing my pcb (clumsy i know) myself... but the thing is playing really nice, not to mention very relaxing too. All diy'ers, which life depend's on the F4, really should consider the to drive it wild an mad...ZenMod
nice weekend...Jesper.
crazy danske was fast almost as his country man LL 
lykkedk earned his right to post piccies of his own because he is first who actually made non-prototype version ..........
first official pair of main boards are happily arrived at first BAF in history....... we'll hear more about Smashing and Barking tomorrow......
well- steen ordered, but he didn't count on my everlasting love for shunt regs .
as result of that love there is The Shunty ........ simply - proper reg for any eeny weeny preamp ........
my friend Oly (AKA Vangelis on DiyA) is responsible for stunning pcbs for both and Shunty ; btw. "The Shunty" is his name for that simple reg . you'll see pcb piccies in later posts.
he is also responsible for keeping me in sane boundaries ; well - almost keeping me 😉
when I drew series reg, in front of already drawn and tested shunt part of now existing Shunty, his only (and last ) comment was "that's pure demonstration of force....... why you need that ?"
I also wanna say many tnx to Off Topic Mob , which constantly make my life miserable with repetitive questions as "will it drive F4?" etc ..........
anyway - this was (is) open source project ......... my intention to make decent preamp for regular DiyA members, without braking leg and arm to find obscuremadeofpreputium audio parts (read - toshiba 3 or 7 legged fuses) ...
both schematics are here ; I intend to sell pcbs along with matched crucial parts , in several levels ........ just main boards with parts, just Shunty with few important parts (if they exist at all) , complete package, main boards with just one Shunty ( if you are bean counter) etc.
to cut a story..........
here is The Shunty schematic:
lykkedk earned his right to post piccies of his own
because he is first who actually made non-prototype version .......... first official pair of main
boards are happily arrived at first BAF in history....... we'll hear more about Smashing and Barking tomorrow......well- steen ordered
, but he didn't count on my everlasting love for shunt regs . as result of that love there is The Shunty ........ simply - proper reg for any eeny weeny preamp ........
my friend Oly (AKA Vangelis on DiyA) is responsible for stunning pcbs for both
and Shunty ; btw. "The Shunty" is his name for that simple reg . you'll see pcb piccies in later posts.he is also responsible for keeping me in sane boundaries ; well - almost keeping me 😉
when I drew series reg, in front of already drawn and tested shunt part of now existing Shunty, his only (and last ) comment was "that's pure demonstration of force....... why you need that ?"
I also wanna say many tnx to Off Topic Mob , which constantly make my life miserable with repetitive questions as "will it drive F4?" etc ..........
anyway - this was (is) open source project ......... my intention to make decent preamp for regular DiyA members, without braking leg and arm to find obscuremadeofpreputium audio parts (read - toshiba 3 or 7 legged fuses) ...
both schematics are here ; I intend to sell pcbs along with matched crucial parts , in several levels ........ just main boards with parts, just Shunty with few important parts (if they exist at all) , complete package, main boards with just one Shunty ( if you are bean counter) etc.
to cut a story..........
here is The Shunty schematic:
steenoe said:
I really appreciate that you type this ...... I know that typing with one finger of other hand isn't easy .......
oh, youth , where are thou .........
seems as we are older,our bones aren't so good anymore
😉
Zen Mod said:
Yeah, and the same goes for your mindspan 😉
Anyhow, we heard your pathetic preamp today with a pair of F4's, since this is the only pre at the momnet that you can get as kit, it's sure the best pre kit around.
Magura 😉
Magura said:
yeah - that's certainly main reason ............... availability .......
......... wait - you aren't
now ?how's
,after our mutual public disgrace and humiliation ?
Magura said:
Ya' postin' from over there?? I didnt know they had internet😀 Maybe you send a telegram with the Pony-express?
🙂
Zen Mod said:
how's
He is still hiding after yesterdays ....ahem....events
Magura 🙂
steenoe said:
Ya' postin' from over there?? I didnt know they had internet😀 Maybe you send a telegram with the Pony-express?
🙂
Yeah I'm posting from here....counting out the fact that they are not as smart as we are, they're pretty much the same over here 😉
Magura 🙂
Magura said:
Did you type this before or after you bowed to Nelson?
EDIT: Oh dear - now this one is heading OT😱
BOM
well...... I had cunnin' plan to make tonight one eeeny weeeny pdf BOM , and again to use that chance to implement many of little jewels of my beautiful mind,as another proof that I'm .... well ..... cunnin'
anyway - reading all that BAF related posts , also looking at BAF related piccies , and again reading BAF related hate posts ........... I just haven't time to do this ........
tomorrow , I hope 😉
well...... I had cunnin' plan to make tonight one eeeny weeeny pdf BOM , and again to use that chance to implement many of little jewels of my beautiful mind,as another proof that I'm .... well ..... cunnin'
anyway - reading all that BAF related posts , also looking at BAF related piccies , and again reading BAF related hate posts ........... I just haven't time to do this ........
tomorrow , I hope 😉
The Pumpkin BOM and schematic
without Shunty ....... that will be dedicated file
hehe - I didn't wrote your fave mica sheets or silicon ones ,along with thermal goo and few screws....... but that 's logical........
without Shunty ....... that will be dedicated file
hehe - I didn't wrote your fave mica sheets or silicon ones ,along with thermal goo and few screws....... but that 's logical........