Originally Posted by
kb2vxa
No, 2500V @ 450mA each side of CT when feeding a full wave rectifier with a choke input filter you get 1800VDC at full load, 225mA when using the total secondary in a full wave bridge or doubler configuration. Maybe a dumb question, what's a 2CX250B? The first figure indicates the number of electrodes, the C is ceramic (the X alone is glass) and the last figures are plate dissipation. Methinks you meant 4CX250B, a very common ceramic forced air cooled VHF tetrode.
That's interesting, two modulating means AM, rather strange for Motorola. What kind of transmitter did you yank that out of? By the looks of the plate transformer and tubes I'd say about 500W RF outpoot, the modulator alone is capable of 500W audio so the tubes just loaf along. It must have some fairly hefty mod iron so you wouldn't happen to be an AM Gangsta now, wudja wudja wudja?