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Re: Transistor identification?

Cross-posted to 5 groups.

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On 09/05/2015 11:05 PM, DaveC wrote:
>> [Who] made the item in question. [?]
>> John :-#)#
> An American offset printing equipment company. It’s a paper/envelope feeder
> for a small offset presses. Extinct company.
>
> I can say that the bandwidth requirement of the circuit is very small—DC-10
> KHz—and low current. Don’t know about gain.
>
> Thanks.
>

There are pretty simple circuit diagrams out there to measure gain if 
you have more transistors with the same markings.

One example:

http://electriciantraining.tpub.com/14179/css/14179_111.htm

The only other criteria are breakdown voltage and current. If it only 
drives other transistors and resistors to Vcc are over around 2K then it 
is likely 100ma or less.

If you know the Vcc you know the minimum breakdown voltage unless it is 
being used to control solenoids that have their own B+ source, then that 
voltage is your absolute minimum (times at least 2).

John :-#)#

-- 
(Please post followups or tech inquiries to the USENET newsgroup)
John's  Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
                      www.flippers.com
        "Old pinballers never die, they just flip out."

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Thread

Transistor identification? DaveC <not@home.cow> - 2015-09-05 13:28 -0700
  Re: Transistor identification? DaveC <not@home.cow> - 2015-09-05 14:18 -0700
    Re: Transistor identification? DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-09-05 20:03 -0400
    Re: Transistor identification? John Robertson <spam@flippers.com> - 2015-09-05 21:52 -0700
      Re: Transistor identification? DaveC <not@home.cow> - 2015-09-05 23:05 -0700
        Re: Transistor identification? John Robertson <spam@flippers.com> - 2015-09-06 00:05 -0700
        Re: Transistor identification? piglet <erichpwagner@hotmail.com> - 2015-09-06 08:11 +0100
  Re: Transistor identification? "Tim Williams" <tmoranwms@charter.net> - 2015-09-05 20:52 -0500
    Re: Transistor identification? DaveC <not@home.cow> - 2015-09-05 21:40 -0700
      Re: Transistor identification? "Tim Williams" <tmoranwms@charter.net> - 2015-09-06 13:03 -0500
      Re: Transistor identification? "Ian Field" <gangprobing.alien@ntlworld.com> - 2015-09-17 20:16 +0100
        Re: Transistor identification? krw <krw@nowhere.com> - 2015-09-17 20:05 -0400
          Re: Transistor identification? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2015-09-18 10:50 -0400
        Re: Transistor identification? Jeroen Belleman <jeroen@nospam.please> - 2015-09-18 09:08 +0200
  Re: Transistor identification? N_Cook <diverse@tcp.co.uk> - 2015-09-06 07:46 +0100
    Re: Transistor identification? John Robertson <spam@flippers.com> - 2015-09-07 13:29 -0700
      Re: Transistor identification? DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-09-07 16:35 -0400

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