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GB "long and skinny" FirstWatt J2 clone PCBs

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JeffYoung

JeffYoung

Member
Joined 2017
#1
I'm producing a set of J2 boards for myself and thought I'd do a group buy to increase volume and reduce costs a bit.

Boards are the "long and skinny" format for FirstWatt-style enclosures with a flanged heat-sink. (Boards are 14" long with 2" hole spacing.) LTP layout is for dual SJ109s (although quad SJ74s will go in the same holes).

Boardhouse will be EuroCircuits. 35uM copper (~60uM after plating). Cost will be between €15 and €25 per channel (depending on volume) + shipping. Cost includes EU VAT.

780489d1568105825-gb-skinny-firstwatt-j2-clone-pcbs-j2-board-front-jpg


780490d1568105825-gb-skinny-firstwatt-j2-clone-pcbs-j2-board-jpg


Schematic, BOM, etc. in post #15 (GB "long and skinny" FirstWatt J2 clone PCBs).
 

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Last edited:
#13
Current list:

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#15
A couple of you have had questions regarding dimensions, BOM, etc.

Note that the schematic and BOM are preliminary. There's some (small) chance I'll make changes before submitting.

The dimensions can be considered final. (The form-factor is the same as my F3 boards, although these are narrower as the parts-count is lower.)

The BOM is for a single channel.

Cheers,
Jeff.
 

Attachments

#16
JeffYoung 1 set
Reima 1 set
WBS 1 set
yoaudio 1 set
secanbj 1 set
Russelc 1 set
JimS 1 set
malisz 1 set
Vitalica 1 set
mordikai 1 set
blackdod 1 set
badrisuper 1 set
JoeyDD 1 set
gary s 1 set
chromenuts 1 set
astromo 1 set
dieter12 1 set
Fabian85 1 set
 
#17
JeffYoung 1 set
Reima 1 set
WBS 1 set
yoaudio 1 set
secanbj 1 set
Russelc 1 set
JimS 1 set
malisz 1 set
Vitalica 1 set
mordikai 1 set
blackdod 1 set
badrisuper 1 set
JoeyDD 1 set
gary s 1 set
chromenuts 1 set
astromo 1 set
dieter12 1 set
Fabian85 1 set
Skunark 2 sets
 
#18
JeffYoung 1 set
Reima 1 set
WBS 1 set
yoaudio 1 set
secanbj 1 set
Russelc 1 set
JimS 1 set
malisz 1 set
Vitalica 1 set
mordikai 1 set
blackdod 1 set
badrisuper 1 set
JoeyDD 1 set
gary s 1 set
chromenuts 1 set
astromo 1 set
dieter12 1 set
Fabian85 1 set
Skunark 2 sets
bk856er 1 set
 
#19
JeffYoung 1 set
Reima 1 set
WBS 1 set
yoaudio 1 set
secanbj 1 set
Russelc 1 set
JimS 1 set
malisz 1 set
Vitalica 1 set
mordikai 1 set
blackdod 1 set
badrisuper 1 set
JoeyDD 1 set
gary s 1 set
chromenuts 1 set
astromo 1 set
dieter12 1 set
Fabian85 1 set
Skunark 2 sets
bk856er 1 set
vasilis 1 set
 
#20
JeffYoung 1 set
Reima 1 set
WBS 1 set
yoaudio 1 set
secanbj 1 set
Russelc 1 set
JimS 1 set
malisz 1 set
Vitalica 1 set
mordikai 1 set
blackdod 1 set
badrisuper 1 set
JoeyDD 1 set
gary s 1 set
chromenuts 1 set
astromo 1 set
dieter12 1 set
Fabian85 1 set
Skunark 2 sets
bk856er 1 set
vasilis 1 set
hifibluedevil 1 set
 
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