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October 29th 03, 02:55 AM

in article , Michael A. Terrell at
wrote on 10/28/03 7:38 PM:

Biz WDØHCO wrote:

After 31 years and a bunch of parts in the garage, I am finally building my
dream CW receiver from scratch.

Just wondering if I converted the 6.3 VAC filament voltage to a DC voltage
if doing so would be worth the effort to reduce hum.

Opinions ?

Also I would like to cut a round 4" diameter hole in the 1/8" aluminum front
panel for the speaker grill. Is there a way to do this without a Greenlee
Pneumatic punch? I have a jig saw which I can cut square holes but round
holes are another matter. Is there a better way? I can drill round holes up
to 7/8" with a unibit but I think 7/8" is as big as they get.

Thanks

Biz - WDØHCO

Do you have a good drill press? You can buy either a 4" hole saw, or
an adjustable cutter that drills a pilot hole, then uses a lathe tool to
cut a clean hole in the metal. They cut a fairly clean hole, but the
metal has to be clamped down, and the tool has to run at a low speed.

Why yes I do and I can change speeds on it.
But I thought those hole saws where for wood only.
BTW Aluminum panel is pretty soft so this might actually work.
Do they make hole saws for metal?

Saw a gizmo called a "fly cutter" used on a drill press to cut holes.
It looked pretty dangerous.
I think that's what you are talking about.

Looks like a trip to Sears is in order!

:^) Biz WDØHCO