[Amps] HF RF amplifier negative feedback

[Steve Thompson]

Ronald, Douglas S wrote:
> Amps fans,
> 
> I have only subscribed to this reflector for a few months, however I
> have never seen any discussion on negative feedback in linears to reduce
> distortion. I plan on feeding a few pf's from the 4CX10000D plate back
> to the driver cathodes in a capacative voltage divider configuration.
> (why a 4CX1000D?, because I have 4 of them with sockets) This topology
> should be frequency independent. I'm planning on a neutralized class A
> amplifier, and from10 to 20 dB of feedback. I wonder if anyone has
> successfully done this, and why it isn't done more frequently? There
> must be a can-of-worms here I'm not aware of...

Make sure you know what's going on outside the intended operating 
frequency range. As I recall, it's a technique discussed in 'SSB 
principles and circuts'.

Steve