TUBE YL 1500

GENERAL DESCRIPTION


picture YL 1500 Coaxial metal-ceramic tetrode, forced-air-cooled, for frequencies up to 110 MHz, particularly suitable for anode-modulated broadcast transmitters up to 20 kW.


TECHNICAL SPECIFICATIONS
HEATING
Heater voltage 7,5 V
Heater current ≈ 115 A
Heating direct
Cathode thoriated tungsten
CHARACTERISTICS
Emission current 28 A
Amplification factor of screen grid 4,8
Transconductance 35 mA/V
CAPACITANCES
Cathode/control grid ≈ 70 pF
Cathode/screen grid ≈ 8,0 pF
Cathode/anode ≈ 0,18 pF
Control grid/screen grid ≈ 85 pF
Control grid/anode ≈ 1,2 pF
Screen grid/anode ≈ 28 pF
Specifications may change without notice

Tube mounting

Axis vertical, anode up or down.

Maximum tube surface temperature

The temperature of the metal-ceramic seals must not exceed 200 °C at any point and the temperature of the anode body must not exceed 220 °C. If an appropriate air duct is provided the cooling air or part of it can be used to keep the maximum permissible temperature of the metal-ceramic seals.

Forced-air cooling

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

THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS
Manufacturer Transmitter specifications Power in kW
Siemens WR Send 10 K-03 10
WR Send 20 K-03 20


THIS TUBE IS AVAILABLE FROM
Manufacturer Rebuilder Distributor

Econco

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