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Zen Mod 21st April 2015 10:43 PM

About possible Babelfish J interest
2 Attachment(s)
Well , after some time , I'm able and willing again to bring some Babelfish J packages ; Sort of altered schematic , including cascodes (easily avoidable by choice) for input LTP , biased through my green (LED string ) trademark thingie .

Package would be comprised of :

-pcbs (one layer , usual thickness/color/overlay mumbo jumbo)) , 2 pcs,
-2 pairs of matched J271 JFets - in this project perfect
substitute/replacement for Toshiba 2SJ74BL ,
-2 pairs of BC556C bjt LTP cascode critters,
-3+3 more BC critters for various position
-2pcs of MMBF5486 smd JFets , working as CCS for cascode biasing,pre-soldered on pcbs,
-2 pcs of 1uF Philips MKC (polycarbonate, my fave ) , bypass for critical position - cap for Aleph CCS modulation .

so , end of list; few more details :

Output mosfets prescribed - IRFP150 (one effectively as two IRFP240), just one pair , no matching needed .
Soldering of outputs - either through hole or on wire bridges on upper pcb surface .

Due to cascoding , PSU voltage can be freely augmented for several volts. Also possible multiplying of outputs with some necessary ingenuity , but if there is enough noise , I can make daughter boards for paralleling of , say , 3 mosfets , when there is no need for additional ingenuity :rofl:

That would be all , if there is enough interest , I'll proceed in Swap Forum .

Price - not cheap , but also not overly expensive , considering that rest what you need is available even in nearest Tobacco store .

Screenshot of pcb attached .

and , yes , I know that BJ isn't exactly in VFet/SIT/SIC frenzy fashion category :clown:

edit: forgot schm

edit edit : in a meantime , trade thread opened:

editeditedit : link to final schematic and parts placement

flocchini 22nd April 2015 02:10 AM

consider me interested :D

gadut 22nd April 2015 02:52 AM

I'm interested ZM

lafish 22nd April 2015 04:11 AM

Tell me more. I wasn't in on the beginning of this conversation.

Zen Mod 22nd April 2015 06:11 AM

more what ?


dady 22nd April 2015 06:17 AM

I am your eternal follower Papa Koan.

Zen Mod 22nd April 2015 06:54 AM

swell :rofl:

certainly beneficial as chasing your own tail ;)

how about this one ?


Zen Mod 22nd April 2015 10:30 AM

trade post here

CeeVee 22nd April 2015 10:38 AM


Originally Posted by Zen Mod (
swell :rofl:

certainly beneficial as chasing your own tail ;)

how about this one ?


...I have this one ...and certainly like it a lot!

That is why i am curious .

Why not go for that one and go for the BJ ? because of the outputs ?


Zen Mod 22nd April 2015 10:52 AM

matter of choice and 200+$ difference in outputs ?

however , speaking of broad interest/possibility - (B)J2 is still sorta uncovered

that's why that opportunity is one time offer

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