[ARC5] S+N/N ratio results.

[Geoff]

I've read that the Collins lab procedure to check sensitivity was to hook 
the (50 ohm) generator output directly to the receiver with no terminating 
resistor or pad.  Included in what I read was the statement that the 
receivers had actual input impedances close enough to 50 ohms to make this 
work out right.

** Interesting, do you have any citations to that?

> ...   At any rate, getting an approximate measurement on a boat anchor is 
> possible.

Oh, good!  I'd rather not thing that all this is in vain.


**  Chuckle


> A meaningful measurement on a receiver with fractional microvolt 
> sensitivity is quite difficult.

I think that many reports of fractional microvolt sensitivity are suspect.

Roy

** Completely agree but easily accomplished over several decades now with 
proper procedures and equipment. For an ARC-5 it would be strictly a labor 
of love but since this group drifts all over the universe there are 
legitimate applications.

Carl