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Old 11th August 2011, 04:16 PM   #391
JBdV is offline JBdV  Netherlands
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Spencer will get back to me next week
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Old 11th August 2011, 04:19 PM   #392
ashaw is offline ashaw  Australia
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What specifications did you ask for might I ask?
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Old 11th August 2011, 10:27 PM   #393
JBdV is offline JBdV  Netherlands
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I have asked for perfect pairs (7,0 and 8,18 mA) and higher current versions if not available, of course everybody can contact Spencer, but I think one joined effort may be better for all parties.(my response to him was pretty quick)
I am willing to buy 50 or maybe more of his best pairs (quads, octets), and provide them for cost to all F5X builders (as far as they need them)
I will keep the rest for future ventures.
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Old 11th August 2011, 11:13 PM   #394
ashaw is offline ashaw  Australia
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I was asking as I had also asked him for some transistors, and was wondering what level of match you were wanting. I asked for 0.05mA match, I was wondering what level of match you asked for.
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Old 11th August 2011, 11:41 PM   #395
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will be interested in what he says . out of the 400 j74'2 and 400 k170's that i bought , i couldn't come up with even one set of those values . these were toshiba packaged 200/bag bl grade fets .

good to see another source to continue the good times

cheers Woody
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Old 11th August 2011, 11:42 PM   #396
JBdV is offline JBdV  Netherlands
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I have asked him to mark all suitable fets with current value with 2 digits after the comma, so picking for best pairs from a bigger quantity will be effective (normally he matches within 0,2 mA)
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Old 12th August 2011, 03:09 AM   #397
NYCOne is offline NYCOne  United States
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Quote:
Originally Posted by JBdV View Post
I have asked him to mark all suitable fets with current value with 2 digits after the comma, so picking for best pairs from a bigger quantity will be effective (normally he matches within 0,2 mA)
I have two "dengen" octets left. Matched to better than 3%.

PM for info.
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Old 21st August 2011, 12:33 PM   #398
JBdV is offline JBdV  Netherlands
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It looks like we are lucky! Spencer will be able to provide pairs of fets in 2 ranges:

K170 will be 6.9 to 7.0 or 7.0 to 7.1 and J74 will be 8.1 to 8.2 or 8.2 to 8.3 mA

There will be enough for all F5X builders if they want.


I will buy the complete lot from Spencer and offer them to all F5X builders for cost.
(The rest I will save for future adventures)

Last edited by JBdV; 21st August 2011 at 12:34 PM. Reason: typo
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Old 21st August 2011, 01:33 PM   #399
ashaw is offline ashaw  Australia
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Also Spencer will do accurate 5R1 degeneration's, (he has got a very good set for me).
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Old 21st August 2011, 01:49 PM   #400
EUVL is offline EUVL  Europe
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Since he has a large pool to match from, you should make use of the opportunity and ask him to match for transconductance as well as bias current.

I am sure he knows how. If not he can PM me.


Patrick
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