More or less pressure can be applied to the ears by proper adjustment. Tension adjustments of the earphones to your ears is done by bending the spring stainless steel pieces as they exit the headphone speaker. When removing the boom it is imperative to pull straight down and out of the clip not to the side as this may break the clip.
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The boom is held to the headphone speaker by the use of a boom clip. The 1/8” or 1/4” stereo plug goes into the headphone jack on the transceiver front panel. The adapter is 6-8” long and has a 1/8” female input jack for the boomset microphone while the 1/4” female that exits the adapter is the PTT (push to talk) line for the Heil foot switch or hand switch.
STEREO HEADPHONES JACK ON ICOM 756 PRO II SERIES
The use of the AD-1 series mic adapters allow simple interface with popular transceiver inputs. The cable features a built in Push to Talk (PTT) button with a conveinent clip on the back to keep it in place. (1/8” to 1/4” adapter included), and the in line PTT terminates in a 1/4” mono plug. The microphone audio for the BM-10 series terminates into a 1/8” male plug while the head phone terminates into a 1/8“ stereo plug. The iC element has an operating frequency response of 35Hz – 12kHz. blocking capacitor so power is passed allowing the iC electret element to operate. This element must be paired with the AD-1-IC (included) or AD-1-ICM adapter. Working with Icom America this element has been made to eliminate the low gain audio on some older and non-pro series radios. The BM-10-iC, using our iC electret element, was created for use on the Icom radios. The high resolution 4.9 inch TFT color dot matrix LCD display provides more operating information than you've ever had before, including a spectrum scope ( 12.5, 25, 50 or 100 kHz).
STEREO HEADPHONES JACK ON ICOM 756 PRO II PLUS
This 600 ohm dynamic element with work on most Amateur Radio rigs. The ICOM 756 Pro II covers all nine HF ham bands plus 6 meters (receive from 30 kHz - 60 MHz). The BM-10-Dynamic headset uses a dynamic element designed specifically for communications use. The BM-10 comes in two versions, a BM-10-Dynamic and a BM-10-iC (electret), to accommodate many radios on the market today. The ear pads are replaceable acoustic foam. The frequency response is 60 Hz- 12 kHz with very low distortion. The speakers used in the BM-10 are extremely sensitive and don’t require much AF drive from the transceiver.
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The BM-10 headset was designed to be a lightweight (only 3 oz), articulate sounding boomset that is ideal for DXpeditions, mobile, and general rag chewing.