TUBE 4-65A / 8165 / QB3/200

GENERAL DESCRIPTION


photo 4-65A The 4-65A / 8165 / QB3/200 is a small radial-beam tetrode with a maximum plate-dissipation rating of 65 watts. In most applications, no forced air is required, normal radiation and convection cooling being adequate. An instant-heating, thoriated tungsten filament is employed, allowing all electrode voltages to be applied simultaneously and permitting the conservation of power during standby periods. The 4-65A / 8165 / QB3/200 is, therefore, a good choice for many mobile applications.

Short, heavy leads and low interelectrode capacities assure stable, efficient operation at high frequencies and permit its use at maximum ratings through 150 megacycles. The 4-65A / 8165 / QB3/200 is equally useful in audio-amplifier or modulator service.		 picture 4-65A


TECHNICAL SPECIFICATIONS
Plate Dissipation (Max.) 65 watts
Screen Dissipation (Max.) 10 watts
Grid Dissipation (Max.) 5 watts
Frequency for Max. Ratings (CW) 150 MHz
Cooling Convection & Radiation
Filament
 Voltage
 Current		 Thoriated Tungsten
6.0 volts
3.5 amperes
Capacitances (Gnd. Cath. Connection)
 Input
 Output
 Feed-through
7.1 pF
2.3 pF
0.1 pF
Amplification Factor (g1-g2) 6
Base 5-Pin Special
Recommended Heat Dissipating Connector HR-6
Maximum Seal Temperature 200°C
Maximum Envelope Temperature 225°C
Maximum Length 4.37 in; 111.00 mm
Maximum Diameter 2.36 in; 60.40 mm
Weight (approximate) 3 oz; 85.0 gm
Operating Position Vertical, base up or down
Specifications may change without notice

THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS
Manufacturer Transmitter specifications Power in kW
Gates HF1 1
HF-100 100


THIS TUBE IS AVAILABLE FROM
Manufacturer Rebuilder Distributor
Covimag
Richardson Electronics
Penta Laboratories
Vacuum Tubes, Inc.


PRICE LEVEL (US$)
1 2 3 4 5 6
0 - 10 10 - 100 100 - 1000 1000 - 10,000 10,000 - 50,000 50,000 - 100,000