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Re: LF: Looking for datasheets for transistors...

To: [email protected]
Subject: Re: LF: Looking for datasheets for transistors...
From: "MIKE REID" <[email protected]>
Date: Mon, 27 Feb 2006 02:06:02 -0600
Delivery-date: Mon, 27 Feb 2006 08:06:55 +0000
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Wow that is perfect. Thank you. I have more than a few of these old transistors. Got them in a collection of VLF equipment. All gold leads and some have gold on the bottom of the can.
 
73's,
Mike
WE0H
----- Original Message -----
From: Johan Bodin
Sent: Monday, February 27, 2006 1:58 AM
Subject: Re: LF: Looking for datasheets for transistors...

Hi Mike,

the 2N508 seems to be ideally suited for use in amateur
LF rigs as it said to be specifically designed for
"entertainment equipment" ;-)

Data from 1975 vintage Motorola books:

> 2N1309

"PNP germanium general purpose amplifier."

Case:
   TO-5, pinout=?

Maximum ratings:
   PD: 150mW
   VCEO: 30V
   IC: 300mA

Characteristics:
   hFE (IC=10mA): 80 min.
   fab ("frequency cutoff"): 12MHz (fT~9.6MHz)
   Cob: 20pF max.
   VCEsat (IC=10mA): 200mV max.


> 2N508

"PNP germanium transistor for audio driver and low
power output service in entertainment equipment."

Case:
   TO-5, base-emitter-collector counting clockwise from
   the "tab" (bottom view). Base connected to case.


Maximum ratings:
   VCB: 18V
   VCEO: 18V
   VEB: 5V
   IC: 500mA
   Tj, Tstg: -65..+100C
   PD: 225mW

Characteristics:
   ICBO (VCB=-16V, IE=0): 16uA max.
   IEBO (VEB=-3V, IC=0): 16uA max.
   BVCER (IC=0.6mA, RBE=5k) 18V min.
   hFE (VCE=-1V, IC=20mA): 99..198
   VBE (VCE=-1V, IC=20mA): 180..320mV
   Cob (VCB=-5V, IE=1mA, f=1MHz): 35pF max.
   fab ("frequency cutoff", VCB=-5V, IE=1mA): 2.5MHz

73
Johan SM6LKM

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