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The Fairchild 2N4249 (S035928)  (P/N 151-0342-00) is a PNP Si low noise amp.

Package: TO-106

NSN: 5961-00-246-2427

RPR: Tektronix RPR for 151- Transistors, pg 456


Semiconductors Common Design Parts Catalog 1982 (pg 189) lists the specs: 60V, 0.1A, hFE minimum 100.

Used in

Some instruments using part 2N4249

Instrument Manufacturer Class Model Description Introduced
DC501 Tektronix Plug-in DC501 basic 100 MHz frequency counter 1972
DC502 Tektronix Plug-in DC502 550 MHz frequency counter 1972
DC503 Tektronix Plug-in DC503 100 MHz, 7-digit frequency counter 1972
DC503A Tektronix Plug-in DC503A 125 MHz, 8-digit frequency counter 1981
DC504 Tektronix Plug-in DC504 80 MHz, 5-digit frequency counter 1975
DC504A Tektronix Plug-in DC504A 100 MHz, 6-digit frequency counter 1984
DC505 Tektronix Plug-in DC505 225 MHz counter/timer 1974
DC505A Tektronix Plug-in DC505A 225 MHz counter/timer 1976
DC508 Tektronix Plug-in DC508 1 GHz counter 1978
DC508A Tektronix Plug-in DC508A 1.3 GHz counter 1980
DC509 Tektronix Plug-in DC509 135 MHz programmable frequency counter 1981
DC510 Tektronix Plug-in DC510 350 MHz frequency counter 1982