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Substitutes ................................... 27
Source ........................................ RCA R-10 - 1932
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Substitutes ................................... 27
Source ........................................ RCA RC-13 - 1937
Source ........................................ RCA R-10 - 1932
The 56 is a three-electrode tube of the uni-potential heater-cathode type recommended for use as detector, amplifier, or oscillator in a-c receivers designed for it. This tube is characterized by its small overall size, its relatively low heater power consumption, its high mutual conductance, and its comparatively high amplification factor. The 56 is especially useful in resistance-coupled audio-frequency amplifiers.
Source ........................................ RCA R-10 - 1932
Bulb .......................................... S-12
Base Type ..................................... Small 5-Pin
EIA Outline ................................... 12-0
EIA Base ...................................... 5A
Mounting Position ............................. Any
Source ........................................ RCA RC-13 - 1937
Bulb .......................................... ST-12
EIA Outline ................................... 12-5
Source ........................................ RCA R-10 - 1932
Heater Voltage ................................ 2.5 V
Heater Current ................................ 1.0 A
Triode
Source ........................................ RCA R-10 - 1932
Input ......................................... 3.2 pf
Output ........................................ 2.2 pf
Grid to Plate ................................. 3.2 pf
Triode
Source ........................................ RCA R-10 - 1932
Plate Voltage ................................. 250 V
Class A Amplifier
Source ........................................ RCA R-10 - 1932
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -13.5 V
Amplification Factor .......................... 13.8
Plate Resistance (approx) ..................... 9500 Ω
Transconductance .............................. 1450 µ
Plate Current ................................. 5 mA
Class A Amplifier
Source ........................................ RCA RC-13 - 1937
Plate Voltage ................................. 100 V
Grid No. 1 Voltage ............................ -5 V
Amplification Factor .......................... 13.8
Plate Resistance (approx) ..................... 12K Ω
Transconductance .............................. 1150 µ
Plate Current ................................. 2.5 mA
If you are uncertain about the EIA designator for a particular tube please use the "Index" button to list all the tubes in the database. You can click on the designator for the closest tube.
(c) 1994-2021 by William A. Beech, NJ7P
Thu, 02 Feb 2023 05:00:17 -0700