XPost: alt.slack, alt.slack.goathead   
   From: j63840576@gmail.com   
      
   Sn!pe wrote:   
   > mixed nuts  wrote:   
   >   
   >> On 1/7/2026 13:01, Sn!pe wrote:   
   >>> phoenix  wrote:   
   >>>   
   >>> [...]   
   >>>> Phototransistors are not really transistors in function IMO, I prefer to   
   >>>> think of them as light-sensitive diodes. However, considering them   
   >>>> transistors can help explain what a transistor does to the unfamiliar.   
   >>>> When light hits the phototransistor, it allows current to pass.   
   >>> [...]   
   >>>   
   >>> Back in the day, I scraped the paint off of a 0C71; it made a   
   >>> pretty good phototransistor, so I'd take issue with that.   
   >>>   
   >>> I grew up with discrete components so none of what you write   
   >>> is news to me   
   >>>   
   >>   
   >> I bought a sack of 2N229 geraniums back in 1956 from a lot radio parts   
   >> store and made some amplifiers with 'em. They worked good but ft was   
   >> about 300 kHz which ain't that great. Then I got an account with Evans   
   >> Radio where I could get all kinds of stuff and switched to RCA and   
   >> Fairchild Si planar parts like 2N2102 and life got magic   
   >>   
   >   
   > Back in ~'62 when I joined the local radio club, they had a stash of   
   > NPN 2N706a rejects.  Only ~25% were completely dud, another 25%   
   > sub-par and the remaining half were just slightly below spec.  I was   
   > given a fistful of them to play with.  Among other things, I built a two   
   > metre converter in a two-ounce tobacco tin using them.   
   >   
   Liar!   
      
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