A month or so ago, my cousin visited me with an unusual gift. He discovered an old machine being scrapped and rescued for me (knowing my hobby) two Eimac 4PR-1000 tubes, with the chassis mount (blower fan included), two sockets, clamps and chimneys. You may figure my surprise when I saw him at my house's door with such bottles in his hands. The tubes where rescued from a medical equipment, so I don't know the performance, although they look visually good indeed. I read somewhere these are improved versions of the 4-1000 types, is this ok?.
There is a chart for AB2 grounded cathode work in the ARRL handbook ('97) which states 3000V plate voltage, and an idle current of 300mA. This while idle means you are nearly maximum rated plate dissipation, is ok?.
Best regards
Guillermo - LU8EYW.
