Damn, I knew I was missing something - no lap... grin

It is also worthwhile looking for signs of corrosion/water ingress etc
and wriggling the plug/connection as you use the Richard method. Stray
bits of wire can reach out and ruin your apparent resistance. (Which we
know of course is useless...)

(Apologies for using your post so flagrantly Richard...)

Cheers Bob VK2YQA

Richard Clark wrote:
Is it possible to check the quality of a coax connection to a PL259
plug without taking the plug apart - i.e. simply by using a
multimeter?

With both ends in your lap: