[Amps] Stuck setscrews

[Bill Turner]

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On Fri, 8 Dec 2017 15:49:18 -0500, the original poster wrote:

>but I can't budge the
>setscrews holding the old one. Allen wrenches twist to no effect.

REPLY:

Allen head set screws sometimes develop a crack from the torque of the
wrench. If so, they are all but impossible to get out except by
drilling. I hope that is not the case for you. Have a close look with
a magnifier and see if you can see a crack. 

Good luck. 

73, Bill W6WRT