I sold my L7 to another ham and he has sent me the following.
I see very low RF output.
Here are some numbers:
plate volts 1900
idle plate current 180ma
30 watts input RF
60 watts output to 50 ohm resistive load (dummy load)
plate current 440ma
grid current 120ma
I see little or no dip in plate current with plate control - all bands same
effect.
I checked the tube hardware, cleaned the output relay etc., there is no arcing,
popping or gassy look on the tubes.
The tube plates do show color on key down...I did let them warm up for several
hours.
I have gotten more output by increasing the drive but not over 160 watts
out...don't want to hurt anything by pushing it.
Any help would be appreciated
Have a good new year
Thanks
NN6U
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