I asserted, "... there certainly can be a tremendous difference in the
quality of similar-type switches."

And Gregg asked, "You mean in switches from Radio Shack?"

I mean among all switches, not just those from Radio shack. Radio shack
doesn't have any good switches.

Besides, you can't pay $16 for a Radio Shack switch, can you? Let's see ...
According to their web site, pushbutton switches (SPST momentary -- suitable
for PTT) range from $2.79 to $3.49.

A really good switch, the Newark 61F1210, is $19.57, according to their web
site.

Of course, we're talking about just the switch itself, not a complete PPT
switch assembly.

Jon