[Amps] 810 Linear Amp

[George Knight]

Hi All,
  I am considering using four 810 triodes parallel connected in a grounded grid amp. Plate voltage would be about 2500 v. and expected output power should be close to a kilowatt. Has anyone in the group made such an animal, and if so, how did it turn out and what pitfalls should I avoid? Any info on operating parameters such as bias would be very welcome.
  Thanks and '73 ,
  George, VE3LTU.