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-   -   Interest for genuine Semisouth SJEP120R100 curve tracer matched pairs & quads (https://www.diyaudio.com/forums/group-buys/330916-genuine-semisouth-sjep120r100-curve-tracer-matched-pairs-quads.html)

EUVL 7th December 2018 03:51 PM

Interest for genuine Semisouth SJEP120R100 curve tracer matched pairs & quads
 
.
We purchased a sizeable stock quite a few years back, and are finally planning to get them matched in 2019 using our own curve tracer.
Matching conditions will be 24V, 0~2A continuous mode on 60C (+/-1C) heater block.
https://www.diyaudio.com/forums/pass...ml#post4795279

We want to know how much interest there still is before deciding how many to match in the first round.
And whether pairs or quads are desired.
Would be great if you could help us get a feel.

Will take a while to match them all.
The heater block alone takes 3 hours to reach steady state temperature.


Thanks in advance,
Patrick

EUVL 7th December 2018 04:02 PM

Curve Traces of 10 Random Samples
 
1 Attachment(s)
The curve traces of 10 random samples taken in 2013 as incoming check.


Patrick
.

yoaudio 7th December 2018 04:36 PM

1 - matched quad.

EUVL 7th December 2018 04:39 PM

Please help to make a running list and include your nickkname :

yoaudio USA 1 quad




Many thanks,
Patrick

biju55 7th December 2018 05:03 PM

how much for a Quad ?.

alazira 7th December 2018 06:12 PM

yoaudio USA 1 quad
alazira1 2 quads

sampsonite 7th December 2018 08:52 PM

yoaudio USA 1 quad
alazira1 2 quads
sampsonite USA 2 quads

Tazzz 7th December 2018 09:06 PM

yoaudio USA 1 quad
alazira1 2 quads
sampsonite USA 2 quads
tazzz 1 quad

EUVL 7th December 2018 10:11 PM

> how much for a Quad ?

Depends on how much matching rejects we have.
If we just measure single point Vgs, we probably and line them in descending order, we shall have little or no rehject.
But if we match by curve traccer, we probably have 25% reject or more.


Patrick

WBS 7th December 2018 11:11 PM

This really is an addiction...

yoaudio USA 1 quad
alazira1 2 quads
sampsonite USA 2 quads
tazzz 1 quad
WBS 1 quad


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