[ARC5] Receiver input impedance.

[Ian Wilson]

Ken,

The input circuitry of these receivers (ignoring DF loop inputs) consists
of a small
antenna trimmer that connects to the first RF tuned circuit. So you are
looking at
an input that looks like a small capacitor in series with a large reactance
(at the
tuned frequency).

I don't think that there was any concept of a matched input impedance to
this. The
antenna input circuit looks like a high impedance, so most of the RF
voltage induced
on the antenna will appear across the input of the first RF amplifier tube
in the Command
Set receiver.

73, ian K3IMW