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Heater-cathode type used as af power amplifier and modulator and as rf power amplifier and oscillator. May be used with full input up to 60 MHz. For class C telegraphy operation at 80 MHz,
plate voltage and input should be reduced to 80 % of maximum ratings; at 125 MHz to 55 %. Class C telegraphy maximum plate dissapation, CCS 25 Watts, ICAS 30 Watts.
Requires small 5-contact socket and may be operated in any position. Plate shows no color when tube is operated at maximum CCS or ICAS ratings.
This is a pentode, with g1, g2, and two beam-forming plates connected to the cathode. It is so shown in the RCA TT-5 Tube Manual. It is NOT a tetrode, as shown in almost every ARRL HB ever printed!
Bulb .......................................... T-12
Base Type ..................................... 5-Pin low Loss Phenolic
EIA Outline ................................... 12-35
EIA Base ...................................... 5AW
Top Cap ....................................... Small
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.9 A
Pentode
Input ......................................... 12 pf
Output ........................................ 7 pf
Grid to Plate ................................. 0.2 pf
Pentode
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 30 W
Grid No. 2 Dissipation ........................ 3.5 W
For other characteristics and typical operation, see 807
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, 18 Aug 2022 15:49:37 -0700