Phone connector

Phone connector

right angle 3.5mm and straight 6.35mm 3 contact Phone connectors
Type	audio connector

A Phone connector is a round jack based connector that is widely used on amateur radio equipment for audio connections as well as other purposes. the name originates from its original use in telephone switchboards in the 19th century.

Characteristics

Mechanical

The phone jack comes in several sizes and configurations, common sizes are 2.5mm (3/32in), 3.5mm (1/8in), and 6.35mm (1/4in) these are available with different numbers of contacts usually from 2 to four.

Common Pinouts

The following pin outs use the Tip Ring Sleeve terminology where the tip is the conductor at the front of the connector and the sleeve is the rearmost conductor. Where one or more rings are used these are listed in order from front to back.

Audio

The Phone connector is often used for audio connections in both the 3.5mm and 6.35mm combinations.

Stereo Audio

Diagram	Details
	ID	name	description
	Tip	Left	Left Channel Audio Signal
	Ring	Right	Right Channel Audio Signal
	Sleeve	GND	Ground

Mono Audio

Diagram	Details
	ID	name	description
	Tip	Signal	Audio Signal
	Sleeve	GND	Ground

Morse Key

The majority of radios use a phone connector for morse key connections this is usually a 6.35mm connector but some radios use the 3.5mm version

Straight key

Diagram	Details
	ID	name	description
	Tip	Key	Key switch connection, connected to ground when key is pressed
	Sleeve	GND	Ground

Note: some radios use the ring connection for PTT or other purposes, when a 2 pin key is used this causes that connection to be shored to ground when the key is plugged in.

Paddle key

Diagram	Details
	ID	name	description
	Tip	Dot	Dot switch connection, connected to ground when key is pressed
	Ring	Dash	Dash switch connection, connected to ground when key is pressed
	Sleeve	GND	Common Ground