[AMPS] Need help for 432 AM6155

[Jerry NO2T]

Need some help
	Trying to get an AM6155 onto 430 MHz. Modified the grid circuit so that it
produces a 1.2-1.4 SWR. Only change in the plate circuit so far is a RF
choke in the B+ line in the cavity.
	At present I am only getting abt 140 watts out at a plate current of 300
ma. Plate voltage is 2200 volts. No grid current. 
	I couldn't get a quarter wave input circuit to work so am using a 3/4 wave
line with a cut down (fewer plates) tuning capacitor.
	Any suggestions as to how to improve the efficiency?
	Tried 2 tubes, performance the same.
		Thanks in advance
		de NO2T - Jerry






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