On Sun, 07 Dec 2008 13:08:00 -0600, msg wrote:

ken scharf wrote:

snip
(I've heard of 807's taking over 1000 volts on the
plate just fine!).

The official ICAS ratings for the 807 allow up to 750 volts at 100ma
plate current, and there is a typical operation shown at 75 watts input,
so at 50w your transmitter wasn't even breaking a sweat yet! A pair of
807's in AB2 (SSB linear) will put out 120w PEP, just about the same as
a pair of 6146's. The 6146B officially will do about 135-140w in the
same service.
snip

FWIW, here is a homebrew quad 837/807 linear that does 2kw PEP with 2KV on the
plates (I have it but did not homebrew this one):

http://www.cybertheque.org/homebrew/837_linear

I took the photos some years ago using a digital camera with focus and image
burn issues; this summer I intend to reshoot these with a better camera.

Michael

I built a 837 "linear" back around 1958. I used mercury vapor
rectifier tubes - love that blue glow. It worked pretty well at about
1200V. I used it mostly for CW and some AM. The 837s were cheap and
pretty rugged. Damn near killed my self on the high voltage so I got
rid of it.

Bruce W0BF