[Amps] Quad Tube 4cx800 hf amp

[Jim Kearman]

> You've got some problems.  First of all, the tube is good for 2 KV DC and 
> pushing it to 2.6 KV would not be recommended.

FWIW, both Alpha and Ten-Tec amps run the 4CX800A at >2000 V. In both cases I believe the loaded Ep is ~2700 V. The Peter Dahl replacement transformer for the Alpha 87A has a 2050-Vac secondary, which should provide ~2900 Vdc unloaded. The Svetlana datasheet for the 4CX800A gives a maximum plate voltage of 2500.

73,

Jim, KR1S
http://kr1s.kearman.com/