[ARC5] Way OT -- SX-28

[Hubert Miller]

>I think contact bias is the reason given. While this trick was very widely practiced its difficult to find 
anything about it in the technical literature. Hallicrafters did mention the resistor in their service bulletin 
about the noise limiter but didn't give a reason.

Ah, I see, I get it, makes sense. Otherwise you have a cloud of electrons hanging around the diode plate.
A diode detector could live with that, but it would have a worse effect on the operation of a noise limiter
circuit.
This reminds me of some 1950s radio project books, with a project like a 25Z5 "diode radio", where you 
had to adjust the filament voltage down from 25 volts for a specific voltage for best operation.
There was also an early 1950s Radio News article on an oscillator that used the "space charge" electrons
as the "plate voltage", which implies the cathode was more negative yet.
-Hue Miller