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JFET matching Jig
JFET matching Jig
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View Poll Results: 2Oz copper & dedicated jumper
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Multiple Choice Poll. Voters: 15. You may not vote on this poll

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Old 12th December 2017, 12:28 PM   #1
kinku is offline kinku  United States
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Join Date: Feb 2013
Location: Maryland,USA
Default JFET matching Jig- Only 1 Oz available

Here is a simple circuit for matching SMD and through hole JFEts. Works for both N and P types and SOT23 and small through hole type.
Can measure
ID
IDSS
Vp
Details here
SMD jfet test jig
No KITS , only PCB

Here is the link to mouser parts list for V2 version (matches dual jfets such as 2SJ109)

https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=86c42aff55

Manual for assembly and use with parts list here for older version. Principle is the same for v2.
JFET matching Jig

2-10M1A just a package designation for original Toshiba dual JFETS. And no such socket is available anywhere that I am aware of.
So what I did was get these two parts (Its in the mouser list linked at the first page)
90147-1104
90147-1103 and solder them at the 4 pin and 3 pin positions and use a drop of superglue between them. Don't forget to hold them together tight while glue is curing, with a clamp.
The dual jfets will slide in without any difficulty.
DON'T FORGET ,if you don't hold them together they may get pushed to the side by glue while curing.
However ,You do not need the socket or dual switch for board to work with non dual jfets.

Last edited by kinku; 3rd April 2019 at 09:33 PM.
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Old 12th December 2017, 12:53 PM   #2
merlin el mago is offline merlin el mago  Europe
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Is only PCB or a really made PCM with all components soldered?
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Old 12th December 2017, 01:01 PM   #3
kinku is offline kinku  United States
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Just PCB , can do it as a kit for may be 5-6$ or assembled unit for 10$. But need to prepay for kit and assembled units.
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Old 12th December 2017, 01:22 PM   #4
tubesguy is offline tubesguy  United States
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This looks great. I'd like either kit or assembled.
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Old 12th December 2017, 01:51 PM   #5
kinku is offline kinku  United States
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Ok, tube guy. Can manage that.
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Old 12th December 2017, 02:26 PM   #6
merlin el mago is offline merlin el mago  Europe
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My vote for assembled and tested unit, no problem prepayment.

Last edited by merlin el mago; 12th December 2017 at 02:30 PM.
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Old 12th December 2017, 02:56 PM   #7
kinku is offline kinku  United States
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If anyone in Europe wants to be a volunteer for 5 or more boards I can ship it to him and everyone else can pay him / her and get the boards either assembled or bare kit to save on shipping. Shipping cost to Europe might not make it profitable to buy. Looking for one Good Samaritan !!!
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Old 12th December 2017, 03:16 PM   #8
tubesguy is offline tubesguy  United States
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Quote:
Originally Posted by merlin el mago View Post
My vote for assembled and tested unit, no problem prepayment.
That would also be my preference.
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Old 12th December 2017, 03:26 PM   #9
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by kinku View Post
If anyone in Europe wants to be a volunteer for 5 or more boards I can ship it to him and everyone else can pay him / her and get the boards either assembled or bare kit to save on shipping. Shipping cost to Europe might not make it profitable to buy. Looking for one Good Samaritan !!!
Rather than sending PCBs across the water, what about sending the ordering details via private Email to the "volunteer". They could then order up 10 PCBs from one of the cheap Chinese PCB suppliers for distribution around Europe.
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Old 12th December 2017, 04:21 PM   #10
pchw is offline pchw  United States
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JFET matching Jig
I will take a couple PCB's.

Thanks!!
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