[Milsurplus] [Boatanchors] (no subject)

[Al Klase]

Hello Raymond,

It's a dual-gate RF MOSFET.  A dual-gate device amounts to being two 
single-gate FET's in "cascode."  The first gate is used for the signal 
input, and the second gate is used to apply AGC voltage.  It's roughly 
the equivalent of a remote-cutoff pentode, so was very popular for RF 
and IF amps in receivers in bygone days.  Gain control remained a 
challenge until proper IC's came along.

Al

On 9/13/2012 9:25 PM, Raymond Cote wrote:
> Does anyone here know the use that the FET 40673 was so popularly used fur?  In what capacity was it used?  A preamp maybe?
> I have found a few and searching Mouser and Digikey did not yield any source. They say they were discontinued long ago.
>
> Anyone?
> Anyone need one?
>
>
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-- 
Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/