Radio-TNC Wiring Diagrams

For hand-held radio model: Kenwood - TR-2400

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Manufacturers have been known to change their usage of pins, please compare diagrams shown with the product's manual. Pins not shown may be used for other functions. Damage may occur if wrong connections are made.

Pins are labeled with the number of the pin, followed by the descriptive name used in Chapter 5 of What is your TNC doing?

Information provided by Alan N6QOG

Mic, Speaker, and PTT Plugs

TR-2400

diagram

Mic Plug (3.5 mm mono) to Mic Jack
Tip of plug - Transmit Signal through a 0.1 microfarad capacitor (See Note 1)
Sleeve of plug - Ground

Speaker Plug (2.5 mm mono) to Speaker Jack
Tip of plug - Receive Signal
Sleeve of plug - Ground

PTT Plug (2.5 mm mono) to PTT Jack
TIp of plug - PTT

Note 1: Some TNCs do not require the capacitor.

Note 2: If your TNC supports a jack for Receive Audio, you can run a speaker cord with a 2.5 mm Mono Plug on one end and a 3.5 mm Mono Plug on the opposite end, straight from the Radio's External Speaker Jack directly to the TNC.

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URL: http://prairie.lakes.com/~medcalf/ztx/wire/k2400.html