[Kenwood] 3SK22 replaced by NTE222 Question ???

[Alex Eban]

If my memory serves me right, the SK family of numbers were RCA's in house
numbers before they were assigned either a 3Nxxx (JEDEC) number or a 40xxx
(proprietary) number. So it is very likely that something like the 3N200 or
40673 should fit exactly. In any case these dual gate FET's are all very
much alike, so using any other, crossed pins or not won't make any practical
difference at HF.
Alex	4Z5KS

-----Original Message-----
From: kenwood-bounces at mailman.qth.net
[mailto:kenwood-bounces at mailman.qth.net] On Behalf Of Bill Cromwell
Sent: Tuesday, June 16, 2009 3:47 AM
To: kenwood at mailman.qth.net
Subject: [Kenwood] 3SK22 replaced by NTE222 Question ???

Hi Bill,

I no longer remember what transistor I used for the replacement in mine
(many years ago). I do recall rearranging the leads as you describe.
Instead of simply crossing the two offending leads and leaving the
others alone I give them all a 'twist' with the two are out of position
more twist. The effect is to leave more clearance between the leads.
Mine has been working without trouble since the early 80s.

Another post suggests that a true substitute does not require this.
That's true as far as it goes but Yankee ingenuity can still get you off
the hook. As long as the electrical characteristics otherwise meet the
requirements just do whatever you need to do. I do things like that all
the time and I'm getting away with murder here. The manufacturer can't
do things like that and keep the price of the new unit down. Yours and
mine are *NOT* new.

73,

Bill  KU8H

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