02-04-2013, 01:00 PM
As for LED's causing interference, you are generally safe. It's only when you use the auto-blinking and auto-color changing LED's that you will get considerable RF noise across the full broadcast band; you can detect the noise from several feet away.
The shape of the beam of an LED can be altered by sanding down the rounded point; leaving it course from sanding often works nicely for backlighting a dial.
The shape of the beam of an LED can be altered by sanding down the rounded point; leaving it course from sanding often works nicely for backlighting a dial.
Pete AI2V