brf:"Try a touch of thread locker (Loctite Blue) on the binding post threads."
I
think that is obviously a terrible suggestion that is offered here you
do not want to use automotive repair materials on your Music
Reproduction System materials such as Loctite cannot possibly be good
for your sensitive electrical connections if you're terminals are
working themselves loose I would humbly suggest they be replaced with
high quality audiophile grade connectors that will not be regularly
subject to such outright failure mode.
Loctite is not an automobile repair material, but a threaded lock sealer. Loctite is designed for threaded fasteners that are subject to backing out due to vibration. In addition, Loctite "Blue" is designed to have its seal/lock easily broken for disassembly i.e. not permanent and reversible. The Loctite is applied sparingly on the binding post thread, and will be not in contact with the spade/binding post interface.