[ARC5] 28 volt transformer question ?

[J Mcvey]

 I do remember opening up one of those early Japanese metal cylinder transistors that were in the protable radios in the 60's.There was a sand like substance inside. Probably a desiccant?

    On Tuesday, September 8, 2020, 10:42:20 PM EDT, Hubert Miller <kargo_cult at msn.com> wrote:  
 
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Which reminds me of some transistors I bought in the early 1960s. It was a B-A Electronics grab-bag, of I think, 5 "general

purpose" transistors for $1. Now generic transistors are cheap as beach sand, but that was then.
 
What was odd was that these transistors, unmarked of course, rattled. No one believes me. I don't know how I discovered
 
this; maybe it was that my high-frequency hearing was better then. But if you held the transistor up to your ear, and shook
 
it, you could hear something rattle inside, sounding like a pellet or BB. Now, with vacuum tubes, rattle is bad; but maybe
 
so-called solidstate is different. Some, but not all of these transistors worked, even though they rattled.  They were audio
 
up to about 1 MHz FT, as I recall. I wish I kept a couple. I didn't feel it was a bad deal. Probably not good parts for a space
 
mission, though. 
 
-Hue 

  
 
>Very impressive, Mike -- I admire your dedication, as well as your luck with the Poly Paks diodes. ;) "U test 'em, and save!"

--Cheers,
Tom


 
  
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