[Hallicrafters] Bristol Screw Removal

[Bill]

Thanks to all about the strange set screws holding the knobs onto
my HT-37.  I ordered a set of Bristol wrenches.  With the wrenches
came a small note telling me how to use them with suggestions if the
screws do not come loose by adding a little heat.  Well, the set
screws did not come off the small aluminum knobs on the HT-37 just
using the Bristol wrenches.  I added a small amount of heat with a
propane torch at right angles to the knob, careful not to heat up
the front panel and the Bristol screws loosened right up.

Thanks to all for the suggestions, identifying the screws, identifying
a source for the wrenches.  Without the help, I probably would have
lost my patience and used a hack saw.

K2WH