IC-705 Microphone Cable Conversion
Someone wanted the schematics, so I’ll publish them. This circuit is not approved by ICOM. We will not compensate you if you are damaged by this circuit. !! Use at your own risk !! Also, the power supply to the microphones should be changed to 8V.
The stand microphone (SM-20) worked fine with this circuit. It also worked with ADNIS in-car microphones. However, when the HM-219 is connected, it transmits without having to press the PTT. I don’t know why.
Put a capacitor in the wiring that leads to the microphone. I was told to do this, but no. The transmission has stopped, but there is no audio input. The hand mic (HM-219) will not be used.
IC-705 Microphone cable converter box
The microphone terminals of the IC705 use a 2.5 mm diameter 4-pole plug. As a result, conventional microphones cannot be used. We made a box that converts the microphone terminals of IC705 into conventional microphone terminals. We have also implemented the four buttons that come with the included microphone.
by ipn factory
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