With a $6 cable, you can get cleaner microphone audio from your CM500 headset, or any other electret mic or headset, plus add a jack for a PTT switch.

The Yamaha CM500 is a very popular headset for amateur radio use. It is rugged, effective, and affordable — $60 at B&H Photo and $55 at Amazon. B&H has a much more accurate description of the product.

Continue reading →