[Amps] Designing the Cleanest Linear with RF Negative Feedback

[Peter Voelpel]

Hi Tom,

The wideband RF-preamplifier in the TA1800 by Racal uses 4 parallel
2N3553 in common base, transformer coupled in and out, it does 10db, 
but standard level of that stage is 50mW in 250mW out.
I will scan that diagram as well.
Probably I will put that diagram of the TA1800, their driver and predriver
chain
and that of the Harris HFL2500 also  on a website tomorrow night, parallel
to mailing it to you.

73
Peter



-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Tom Cathey

I will look at the OPA695 RF op-amp you suggested. A friend also  suggested
I  could take the 10 mw out of the FT-1000D and build a Norton push pull
amplifier with  some 2N3375's he has. A pair would do about a watt class A. 
Maybe that would be a good driver for the 6146, since only 100Mw is needed.