Kevin Dooks wrote:

Sorry, I should have given more info. This home-brew CA
( Canoe Anchor ) covers 40 thru 10M, CW and phone and runs 400 ish
volts on the plate. There are space limitations, height including
envelope and base con't exceed 3 inches max and envelope diameter
can't exceed 1.65 inches due to cabinet restrictions.

Would LOVE to use an 807 or 6FL6 or similar but I just don't have the
room.

Hi,

You might try a 5881 tube. It's shorter than the normal 6L6GC's.
5881 seated height is 2.9"
Height including base pins is 3.938", diam 1.438"

I would buy a new old stock GE or RCA 5881,
in case the current production
imports are not suited for rf, since production is now aimed
at the electric guitar amplifier market.

The 5881 has 23W max plate dissipation. The original series
6L6/ 6L6G/ 6L6GA/ 6L6GBGB had 19W max plate dissipation,
and the 6L6GC had 30W.

73,
Ed Knobloch