I have a Commander II amplifier that I bought used a few years ago. The
thing has never put out the 1,000 Watts it is rated at. Whenever I tried to
get more that 600 or 700 Watts out I could never tune it to keep the grid
current down to an acceptable level (less than 50 mA). This past week, at
the urging of a friend, I replaced the tube with a spare that I had. Now I
get 1000 Watts out no problem. My friend also told me that he had heard
that Eimac had made a batch of 3CX800s that drew excessive grid current and
that this is a known problem. The date code on the tube is 9926. By the
way, the tube I replaced it with was a much earlier date code, 9251. Does
anyone know anything about this? Did Eimac do anything for the hams that
had these tubes? Any information would be appreciated.
73
Jim W4KXY
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