[ARC5] BC-221-D, tool needed to undo knobs

[Kenneth G. Gordon]

On 1 Oct 2017 at 20:50, Leslie Smith wrote:

> I have tried 1/16, 5/64, 3/32 Bristol wrenches.  (Allen keys).

Les, as I am sure you have been told by now, Bristols are NOT Allens. Bristols have teeth: 
Allens are flat. 

Never the twain shall meet.

Ken W7EKB

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