Push to Talk for the Kenwood TH-D74
I use the Kenwood TH-D74 in my car and at my desk. Along with the radio, I use a Bluetooth Headset for communications.
I wanted an easier (to use) Push to Talk (PTT) method.
In the image below is a cord with a Push Button on one end and two connectors on the other.
The cord is connected to the Normally Open contacts under the push button sleeve.
Each contact of the Push Button is connected by the cord to the sleeve of a 3.5 mm and 2.5 mm plug.
Shorting the two sleeves (pushing the button) causes the Push to Talk action on the Th-D74 radio.
This setup works great when the Bluetooth headset is connected to the radio.
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Note: While these plugs are inserted into the radio, Bluetooth is the only way for audio communications to work!
Homebrew Push Button PTT TH-D74