TUBE RS 2012 CL

GENERAL DESCRIPTION

Coaxial metal-ceramic tetrode for frequencies up to 110 MHz, forced-air-cooled; particularly suitable for single-sideband communications transmitters up to 10 kW with grid-current free modulation.

TECHNICAL SPECIFICATIONS
HEATING
Heater voltage	10 V
Heater current	±83 A
Heating	direct
Cathode	thoriated tungsten
CHARACTERISTICS
Emission current	35 A
Amplification factor of screen grid	8,4
Transconductance	70 mA/V
CAPACITANCES
Cathode/control grid	±76 pF
Cathode/screen grid	±5,50 pF
Cathode/anode	±0,07 pF
Control grid/screen grid	±122 pF
Control grid/anode	±0,75 pF
Screen grid/anode	±22 pF
Specifications may change without notice

Tube mounting

Axis vertical, anode up or down.

The tube has to be connected by means of header sockets, in which the terminal anodes for cathode, control grid, and screen grid contacts are combined to a unit and provided with spring-finger contacts.

Maximum tube surface temperature

The maximum temperature of the metal-ceramic seals must not exceed 220 °C at any point and the temperature of the internal cathode terminal must not exceed 250 °C. These requirements can be met without additional cooling, if an appropriate air duct and sufficient space between the individual contact springs is provided so that enough cooling air can pass through.

Forced-air cooling

The minimum air flow rate required for the maximum anode dissipation is given in the cooling air diagram, valid for 25 °C inlet temperature at a normail air pressure of 1 bar (sea level). The cooling air is supplied from the electrode terminal side.

THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS
Manufacturer	Transmitter specifications	Power in kW
RIZ Transmitters	OR 5 K-01/A	5
RIZ Transmitters	OR 20 K-02	20

THIS TUBE IS AVAILABLE FROM
Manufacturer	Rebuilder	Distributor
Thales	Kennetron

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