John Dos schrieb:

I'm trying to build an antenna for my 40 channel transceiver. But the
(female) RCA connection (at the feedpoint) is throwing me off. Is it 50 ohm
or 75 ohm?

CB-radios usually have 50 Ohms impedance.
But RCA-connectors are not specified.
Also PL-connectors do not have a specified impedance.

I know BNC-connectors having 50 and 75 Ohms impedance.
Below 50Mhz it doesn't make much differenc anyway....