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Nanozeugma · 11th Oct 2018, 4:08 pm

Hi.
Currently restoring a venerable Murphy A104 baffle receiver.
Step 1. Get the chassis out of the case; small problem, the outer knob on the central dual concentric shaft won't shift... curses!
Half the steel grubscrew head sheared off when undoing it.

Applied much percussive maintenance, oil etc; still won't shift.

Last chance saloon; brute force method. large file blade underneath and heave... remarkably it pops off and no damage

The problem:
Grubscrew stuck in the threaded hole with half the head missing and can't get even the tiniest pair of needle nosed pliers down there to shift it.

Any ideas?

Photographs attached.

11th Oct 2018, 4:08 pm	#1
Nanozeugma Heptode Join Date: Nov 2017 Location: London, UK. Bury, Lancashire quite regularly :) Posts: 611	A little A104 problem... Hi. Currently restoring a venerable Murphy A104 baffle receiver. Step 1. Get the chassis out of the case; small problem, the outer knob on the central dual concentric shaft won't shift... curses! Half the steel grubscrew head sheared off when undoing it. Applied much percussive maintenance, oil etc; still won't shift. Last chance saloon; brute force method. large file blade underneath and heave... remarkably it pops off and no damage The problem: Grubscrew stuck in the threaded hole with half the head missing and can't get even the tiniest pair of needle nosed pliers down there to shift it. Any ideas? Photographs attached. Attached Thumbnails __________________ Thermionic Emission, warms the cockles of your tubes.