Sorry, I'm totally wrong... it's the 4cx350F that uses 26.5volts on the heater, Leigh's reply is
correct. Memory isn't what it used to be..

Steve H
"steve H" wrote in message ...
Heater voltage, 250B is 6V (not 6.3) 250R is used in aircraft etc and has a heater voltage of
26-28V. as far as I am aware all other specs are the same, I have used both types in a 2M amp
without having to change anything other than heater voltage.

Steve H
GOLMV
"¿À�ø¼Ö" wrote in message ...





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