Pro Micro Single Ear Headset with Icom Condenser Element - AD-1-iC Cable Included
Heil Sound Pro Micro Single Side Headsets are very unique high performance single earphone boom microphone headsets. The headsets are outfitted with the HC-6 mic element. Designed for commercial broadcast applications, the -3 dB points are fixed at 100 Hz and 12 kHz with a sensitivity of -57 dB at 600 ohms output impedance (centered at 1 kHz).
The microphone audio for the Pro Micro Single Side Headsets terminates into a 1/8 in. mono male plug, while the headphone terminates into a 1/8 in. stereo with an adapter for 1/4 in. headphone jacks. All Heil Pro Micro Single Side Headsets include a foam windscreen that fits over the microphone. The windscreen does not change the frequency response, just the breath blasts directly into the microphone.
To adjust the headset, simply bend the stainless steel piece that is inside of the black padded headband. Mic gain is adjusted while you're watching the ALC meter. Adjust the gain so that the audio peaks just fill out the ALC scale and do not go beyond it. Set the VOX gain controls for proper activation. If your rig has carrier balance, it acts as a type of mic tone control. It is best to listen to yourself in another receiver as you transmit into a dummy load. You are actually moving the carrier +/-200 Hz above or below the center of the filter network, which causes your microphone audio to change its tonal quality.
The use of the AD-1 series Headset Adapter Cables allows for a simple interface with popular transceiver inputs. The adapter is 6 in. long and has a 1/8 in. female input jack for the headset boom microphone and a 1/4 in. female for the PTT (push to talk) line for the Heil foot or hand switch. The headset stereo plug goes into the headphone jack on the transceiver front panel.