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Interest for genuine NOS Harris IRFP9240s, Vgs matched quads and pairs
Interest for genuine NOS Harris IRFP9240s, Vgs matched quads and pairs
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Old 21st October 2019, 11:21 AM   #1
EUVL is offline EUVL  Europe
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Join Date: Oct 2003
Default Interest for genuine NOS Harris IRFP9240s, Vgs matched quads and pairs

.
This is not a GB yet, but only to gauge interest.

And it would not be organised by the XEN team.
A very kind member of this forum in Canada will most probably be taking over the organising and matching.

In the process of the development of the UDNeSS, we wish to use NOS Harris IRFP9240s as output devices.
UDNeSS, or You don't need Semisouth's

It is well know that the currently available Vishay IRFP9240 has the same Yfs drop-off in the audio band
as the former International Rectifier versions.
See :
Official M2 schematic (post #2219)
http://www.firstwatt.com/pdf/art_mos_test.pdf

NOS Harris versions are still available at Rochester. MoQ is 74.
So it makes sense to buy 100x.

I wonder if there is sufficient interest for a GB.
Max 2 quads or 4 pairs per person, 20% matching reject (Vgs at 1.25A, room temperarture).
When quads run out, then you get pairs.
(But Vgs match from 100x should have good yield.)
First come first serve.
Same price. No waiting list. Otherwise too complicated.
Profits, if any, goes to charity (e.g. Unicef).

Takers are not limited to UDNeSS builders.
Equally attractive for F4's, or just to stock up while still available.
You should be looking at 5 USD per FET plus PP plus postage (~12 CAD for 200gm, no tracking).
Exact costs we shall know later (delivery to Canada, import tax, ...., etc.)


Cheers,
Patrick
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Last edited by EUVL; 21st October 2019 at 11:23 AM.
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Old 21st October 2019, 11:21 AM   #2
EUVL is offline EUVL  Europe
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Join Date: Oct 2003
Subscribers :

EUVL 2 quads
Organiser 2 quads
Morde 2 quads
CeeVee 2 quads
---


Running total : 32 FETs
Cut off : 80 FETs

.
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Old 21st October 2019, 11:39 AM   #3
1543 is offline 1543  Germany
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Join Date: Jun 2004
Location: Ruhrgebiet
Interest for genuine NOS Harris IRFP9240s, Vgs matched quads and pairs
Subscribers :

EUVL 2 quads
Organiser 2 quads
Morde 2 quads
CeeVee 2 quads
1543 1 quad, 1 pair
---


Running total : 38 FETs
Cut off : 80 FETs
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Old 21st October 2019, 01:50 PM   #4
darrr is online now darrr  Poland
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Join Date: Jan 2018
Location: Poland
EUVL 2 quads

Organiser 2 quads

Morde 2 quads

CeeVee 2 quads

1543 1 quad, 1 pair
darrr 2 quads


Running total : 46 FETs

Cut off : 80 FETs

Last edited by darrr; 21st October 2019 at 01:53 PM.
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Old 21st October 2019, 04:17 PM   #5
TungstenAudio is offline TungstenAudio  United States
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Join Date: Jan 2014
Location: Kenmore, WA
I am curious – in some ways it would seem that the IRFP9140 is a better match than the 9240. I have used the 9140s in my M2x with very good results. Would it make any sense to offer matched pairs / quads of IRFP240 + IRFP9140?
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Old 21st October 2019, 04:35 PM   #6
yoaudio is offline yoaudio  United States
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Join Date: Oct 2010
Location: Northern Michigan
Interest for genuine NOS Harris IRFP9240s, Vgs matched quads and pairs
EUVL 2 quads
Organiser 2 quads
Morde 2 quads
CeeVee 2 quads
1543 1 quad, 1 pair
darrr 2 quads
yoaudio 2 quads

Running total : 54 FETs

Cut off : 80 FETs
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Old 21st October 2019, 04:42 PM   #7
JeffYoung is offline JeffYoung  Ireland
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Join Date: Jul 2017
Location: Ireland
Interest for genuine NOS Harris IRFP9240s, Vgs matched quads and pairs
FWIW, in my experience Rochester doesn't enforce their minimum quantities, just their $100 minimum order. I bought 24 Harris IRFP9240s from them last year (which in hindsight was sub-optimal as I could have gotten 30 for the same price).
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Old 21st October 2019, 04:50 PM   #8
feds27 is offline feds27  United States
diyAudio Member
 
Join Date: Jun 2004
Location: Holmdel, NJ
EUVL 2 quads
Organiser 2 quads
Morde 2 quads
CeeVee 2 quads
1543 1 quad, 1 pair
darrr 2 quads
yoaudio 2 quads
Feds27 2 quads

Running total : 62 FETs

Cut off : 80 FETs
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Old 21st October 2019, 05:04 PM   #9
brianco is offline brianco  Ireland
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Join Date: Aug 2005
Location: Scottish Borders - Kelso; on the famous Tweed River!
EUVL 2 quads
Organiser 2 quads
Morde 2 quads
CeeVee 2 quads
1543 1 quad, 1 pair
darrr 2 quads
yoaudio 2 quads
Feds27 2 quads
Brianco 2 Quad

Running total : 70 FETs

Cut off : 80 FETs
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Old 21st October 2019, 05:17 PM   #10
Itsmee is offline Itsmee  England
diyAudio Member
 
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Join Date: Feb 2009
Interest for genuine NOS Harris IRFP9240s, Vgs matched quads and pairs
EUVL 2 quads
Organiser 2 quads
Morde 2 quads
CeeVee 2 quads
1543 1 quad, 1 pair
darrr 2 quads
yoaudio 2 quads
Feds27 2 quads
Brianco 2 Quad
Itsmee 2 Quad

Running total : 78 FETs

Cut off : 80 FETs
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