2N1516

The 2N1516 is a Germanium PNP transistor. It has a breakdown voltage of about 25 V and a maximum collector current of 10 mA. The minimum Beta is 20.

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Tektronix used the 2N1516 as a replacement for the earlier OC170. Unfortunately, the 2N1516 is also prone to failure due to internal tin needle formation. For more information on tin needles see the links below.

Due to tin whiskers growing inside the case, 2N1516s are a common source of problems on some equipment of the early 1960s.

Links

• Thread on tin whiskers in OC170/OC171 @ vintage-radio.net / Detail pictures

Early manuals for the 3S76 call for OC170s in the schematics but only mention 2N1516s in the parts list. It seems likely that OC170s were used in pre-production, and possibly very early production 3S76s, but were changed to 2N1516s very quickly.

Some instruments using part 2N1516

Instrument	Manufacturer	Class	Model	Description	Introduced
3S76	Tektronix	Plug-in	3S76	Dual Channel Sampling plug-in	1962

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