Might help,
I use a hole saw and drill to cut speaker holes, I picked up my kit from Home Depot it’s made for cutting holes for door knob assemblies. Works best if you have a drill press. For grilles I use metal fan guards, like for pc fans, 80 thru 120 mm depending on speaker size and they are less than a couple bucks. BG Micro has quite a few different sizes.
Since I play with Tube Amps and Radios I have several chassis punches that help with holes for displays and such. I rough out then use nibbler and file.
Maybe this will help someone else,
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On Jan 24, 2018, at 13:59, Jim Sheldon <
w0eb@...> wrote:
Thanks! ?I was look for an easier way to lay out the speaker holes than using a ruler & a pencil with careful measurement! ?I took a dead LCD display, carefully milled out the PCB behind the black metal frame (after removing the LCD's guts) and now use that as a template for milling an LCD window in either PCB, Aluminum or Plastic panels. ?(Have to run the milling bit really slow on plastic or it gets all gummed up though - LOL.)
Jim - W0EB
------ Original Message ------
Sent: 1/24/2018 1:31:35 PM
Subject: [BITX20] Perfect speaker grill
To get a tidy speaker grill on your EF01 enclosure or what ever you are using have a rummage in the kitchen utensil draw you may find the perfect template.? I used a plastic sifter lid as the holes were the size I wanted.
Draw a center line where you want it positioned, line up the template, drill one hole on the outer circle, insert nut and bolt, drill hole opposite end of template, insert nut and bolt, now drill rest of holes in perfect place.? Hot glue speaker in place on
underside of lid.
Peter G4NJJ
James Lawrie