Antique radios, Old Time Radios
2N489
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Country:
United States of America (USA)
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| Identical to |
2N489
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| Similar
Tubes |
Normally replaceable-slightly different:
2N491
; 2N494
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| First Source
(s) |
Dec.1957 : - - Manufacturers Literature
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| Base |
Wires
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| Description |
Silicon unijunction transistor. 250mW power dissipation, 2A peak emitter current, 60V emitter reverse voltage.
5.6 kohms interbase resistance at 25 degrees/C, 0.56 intrinsic standoff ratio, 0.07 microamps emitter reverse current at 25 degrees/C.
Text in other
languages (may
differ)
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Dimensions (WHD)
incl. pins / tip |
9 x 7 x 9 mm / 0.35 x 0.28 x 0.35 inch |
| Weight |
1 g / 0.04 oz |
| Information source |
-- Original prospect or advert Electronics, Dec. 1957, pg. 257
-- Collector info (Sammler) KTT 1969/70
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2N489: TTT Steidle 1981
Günther Stabe † 19.8.20
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