Ian,

Thanks for the lowdown. I am saving the message. I looked through the Moto
RF book last night and noticed some specs spell out by what they mean by
output impedance (conjugate of load), while others don't. Newer ones seem to
qualify it. Since the efficiency of these devices is usually around 50%, you
can't tell which is which by looking at the numbers.

I have designed several 6m amplifiers by choosing the parallel load
resistance based solely on VCC and desired PO, and it always worked.

Tam/WB2TT