I just took mine apart to have a look.
It might be possible to use a large-tip 100 watt iron and solder the connector to the metal shell/shield, as well as to the circuit board from below.
Melting the insulator inside the connector, would be one of the obstacles.
Any sort of small tip or low powered iron or gun would NOT work, and only damage the connector!
Anyone not experienced in such repairs might damage more than the connector!
I haven't done such a repair in decades, and would make several practice runs before touching my receiver.
A better approach might be to replace the connector with a bulkhead-mount model.
They have a square flange with four holes for screws to secure the connector to a chassis.
I don't have one on hand, but I think the flange is too large to fit, and would have to be ground or filed down.
Might be something to explore.
For any piece of test equipment which is moved a lot and disconnected repeatedly, I would use the push-on adapters.
Screw them onto your coax, then just push the adapter onto the rear of the receiver.
They can wear or get loose, but as long as they are in good repair, they'll prevent damage to the receiver.
And listen to whatever advice the manufacturer has to offer! :up