[Amps] Linearity metering

[Steve Thompson]

On Friday 08 October 2004 02:16, Jason Buchanan wrote:
> I noticed in the 1972/1973 ARRL handbooks that I have there is a 4-1000A
> amplifier project with a linearity metering circuit.  Look for the
> SS-2000 project.  This seems like an incredibly good idea, however I
> have never seen anything like this in any other amplifier except for
> something similar apparently in the ACOM 1000A (and presumably the
> 2000).  It seems to me that the ability to tune for optimum linearity
> would be a "Good Thing"(tm) and the circuit design appeard to be simple
> to implement.
>
> Was the original designer of this circuit blowing smoke or is this
> something worthwhile to add to a homebrew amp?
Several replies have mention Collins gear having the indicators - optimum 
tuning indicators and linearity tracers are discussed in 'Single Sideband 
Principles and Circuits' from 1964. Two of the authors worked for Collins at 
the time.

Steve