[Radio Wrangler]

Are you using an ordinary DC Ohm meter?

It is good practice to have a low impedance DC connection from antenna to earth on a receiver. General coverage shortwave receivers were expected to be used with a simple long-wire antenna, and the DC path to earth prevents the build-up of static charge, and also provides a leakage path should it experience statically charged rain.

So the inputs to receivers are often a transformer winding to earth, or a tapping on an inductor to earth. It presents a latrge impedance at the frequency the receiver is tuned to, but it presents a low impedance at other frequencies and at DC.

I don't have the 9R-59D schematic, so I can't comment on what it shows. But it ought to have a DC path somehow. Antennae can just charge up and up until some component flashes over.

David