> My very first paying job, back when I was in high school, was on
> a production line doing just that.  We were making these little
> 2-meter Nuvistor preamps for somebody, and my job was sitting
> there tweaking the trimmers to get that null.  Over and over, all
> day long...


For the uninitiated, a Nuvistor is a FET with a heating element inside :-)

Well, maybe not quite. They were (are?) very small vacuum tubes with a metal
casing - size was about the tip of a typical small finger AFAIR. Excellent
VHF characteristics due to small size and low interelectrode capacitance
etc. Much loved by radio amateurs for use on 2 metres (144 MHz) and probably
higher.


        RM

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