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I started with some 3/4" MDF and made a frame.
Then over to the router table to cutout for the recessed top and bottom.
Next a first pass cut for the plexiglass insert.
Followed by a cut through with the table saw.
A perfect fit for the 1/4" plexiglass rod.
Now for the corners. Mark the 1" round stock and rip on the table saw.
Cut the corners of the frame to match and you get rounded corners.
I cut out the back for the recessed connector panel.
Then a lot of primer, sealer, sanding and painting.
I got this AR TDS module off Ebay for $10 and pulled the module out.
A 23 step attenuator with 1% Vishay-Dale resistors and
TDS mounted.
I used a flex shaft out of an old Yamaha CR-640 for the billet control knob.
There is also a cold cathode blue neon light inside.
The internal wiring is shielded coax.
The lettering was done with rub on letters I picked up at a hobby store.
Finished with Krylon Semi-Flat black and several coats of
DEFT
and all setting on Daruma Isolation Bearings.