On Thu, 16 Sep 2004 07:40:25 -0700, Bill Turner
wrote:



The problem with 807's is that having only a 25 watt plate dissipation
rating and running a pair in a linear with about 66% efficiency, you're
only going to get out about 100 watts. Today's generic transceiver
already puts out that much, and if you're looking for an HF "brick" for
a QRP rig, solid state is a better way to go.

On the other hand, a nostalgia-driven project could be lots of fun.

Back in the olden days they were a useful tube, but not so much anymore.
Too bad.

the more important limiting parameter for application as ssb linear
amplifier is max cathode current.

It could be mentioned that 4-65 has the same max PEP input as 4-125
because the cathodes are the same

-jm
---
J. M. Noeding, LA8AK, N-4623 Kristiansand
http://home.online.no/~la8ak/c.htm