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Re: Something interesting found in an old databook

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On 01/19/2018 07:11 PM, Dave Platt wrote:
> I stopped by a local electronics-surplus store yesterday (Weird Stuff
> Warehouse in Sunnyvale).  Out in front they had a rack full of VHS
> tapes, cassettes, and other stuff with a "FREE" sign on it.  There
> were a couple of boxes of databooks of various sorts as well.  I dug
> through and found two I decided to take home - Motorola, and National
> Semiconductor "Small Signal" transistor/diode manuals from a couple of
> decades ago.  Most of the parts involved are now unobtanium as
> new-stock in through-hole packaging, of course, but there are still
> enough SMT versions and old-stock around to make these books interesting
> reading.
> 
> Looking through one, I saw something that I found rather surprising.
> 
> http://www.radagast.org/~dplatt/oopsie.jpg
> 
> Am I missing something here, or is this as odd as it seems?
> 
> 
> 

Pretty odd for silicon, for sure.  Germanium transistors commonly had
negative betas (alpha > 1) so weird circuits like that were around back
in the day.

(My 1994 edition Motorola small-signal databook has the figure corrected.)

Cheers

Phil Hobbs

-- 
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
https://hobbs-eo.com

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Something interesting found in an old databook dplatt@coop.radagast.org (Dave Platt) - 2018-01-19 16:11 -0800
  Re: Something interesting found in an old databook Ralph Mowery <rmowery28146@earthlink.net> - 2018-01-19 23:08 -0500
    Re: Something interesting found in an old databook Johann Klammer <klammerj@NOSPAM.a1.net> - 2018-01-20 14:33 +0100
      Re: Something interesting found in an old databook Ralph Mowery <rmowery28146@earthlink.net> - 2018-01-20 10:30 -0500
  Re: Something interesting found in an old databook Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-01-20 11:05 -0500
  Re: Something interesting found in an old databook Brian Gregory <void-invalid-dead-dontuse@gmail.com> - 2018-01-21 00:51 +0000
  Re: Something interesting found in an old databook legg <legg@nospam.magma.ca> - 2018-03-08 18:40 -0500

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