1625
Tetrode · IHT · UX-7 · 1942
“Military 807. 12.6V heater. WWII surplus.”
Beam power tetrode rated at 30W for high-power output stages
TRANSCONDUCTANCE0mA/V
GAIN0%
POWER75%
DRIVE50%
LINEARITY75%
EXECUTIVE SUMMARY
The 1625 is a indirectly-heated beam tetrode from RCA·GE, introduced around 1942. Commonly used in transmitting / power applications. Military 807. 12.6V heater. WWII surplus.
APPLICATIONS
High-power output
Generic tetrode transmitting / power stage
• PA/public address
HISTORY
Introduced1942ManufacturerRCA·GEEquivalents807 (12.6V heater)
Pre-WarSPECIFICATIONS
Heater Voltage12.6V
Heater Current0.45A
Max Plate Voltage750V
Max Power30W
Sensitivity6 mA/V
Gain Factor—
Internal Impedance—
PinoutUX-7
Era1942
RarityCommon
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.