[Kenwood] 3SK22 FETS used on R-599A be replaced with 40673?
WA2BPE
[email protected]
2003年9月02日 14:32:30 -0400
It may be a repeat, but, FWIW, several compatible/usable DGFETs are available
from "Dan's Small Parts...". These are indeed getting harder to find. It is
likely that a little retweaking will be needed.
Tom - WA2BPE
Peter A Markavage wrote:
> I think we covered this back a month or two ago. The 40673 and the 3N200
> can also be used in place of a 3SK22. I believe the lead configuration is
> the same but it would be wise to check before you put it into the
> circuit. If the 1N60's are still good, leave them in. Note, if one or
> both of these diodes is shorted, you will have very low sensitivity. Also
> check Q3, 2SK19. A bad or weakening Q3 will also result in low
> sensitivity.
>> Pete, wa2cwa
>> On Mon, 1 Sep 2003 22:35:42 EDT [email protected] writes:
> > Can one replace the 3SK22 FET with a 40673 FET? I have a few 40673
> > FETs. I do
> > not have any NTE222s.
> > The front end of my R599A receiver has low gain. I think the RF amp
> > needs to
> > be replaced.
> >
> > Also how do you test a dual gate MOS FET? A transistor is very easy
> > to test.
> >
> > Since the 40673 are diode protected FETs do I still need the dual
> > 1N60 diodes
> > ahead of the RF amp?
> >
> > I got the new function switch connected successfully! My T599A works
> > great!
> > (The previous owner had removed the switch without keeping track of
> > the
> > wires.)
> > Now, I just need to get the R599A working....
> >
> > JohnB
> > K1JEB
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