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Central Sales and Mfg Corp 4C28 micropup pulse modulator triode

Size This valve measures 95x50mm overall.


Filament voltage6V
Filament current6.5A
Filament starting surge current13A
Amplification factor22
Cathode warm-up time3 mins
Peak cathode current2.7A
Peak anode current2A
Peak anode voltage8kV
Peak power output6.5kW

The valve requires forced air cooling and needs to be mounted vertically. An air blast of at least 5 cu ft/min on the cooling fins and 1 cu ft/min on the grid seal is required for an anode dissipation of 150W.

Makers name on anode fins

Top quarter view Bottom  quarter view

Information provided by Frank Philipse

This file was last modified 14:57:24, Tuesday September 02, 2014