background image

For the pads marked RX, TX, NC and NO, the connection is to the upper pad and the lower pads are connected to 

ground on the board as shown above.

For antenna switching between a receiver and Transmitter, you will only need to use the ANT, RX and TX 
connections.   

The Auxiliary contact set can be utilized to mute audio of a receiver by switching its output to a resistor  during 

transmit instead of the speaker or headphones.  

This would be accomplished by connecting the audio to the Aux input and connecting a speaker to the normally 
closed (NC) output and a 10 ohm or so resistor from the normally open output to ground. 

If the TR switch is embedded into another system, jumper wires can be used to the appropriate pads for signals, 

power and control lines (if needed).

To connect to a BNC or other external RF type connectors, the center will go to the pads as shown below and the 
ground is the adjacent pad.

You can see the pads with traces and connected to ground by looking at the back of the board.  As a guide, the 

trace locations are shown in the drawing below.

The additional switched contacts (if used), are connected in the same manner.

Easy TR Switch V3 20171212

                            6        

Connect 
center of 
BNC here

Connect 
center of 
BNC here

Connect 
center of 
BNC here

Connect 
center of 
BNC here

Содержание Easy TR Switch

Страница 1: ...or switching an audio channel or even to switch a remote amplifier or pre amplifier Manual operation is achieved through use of control inputs to disable RF switching and to key the relay Features an...

Страница 2: ...l unless you want a copy Print the Parts List and Schematic last two pages then view the rest of the manual on a computer laptop or tablet The Parts List has columns for inventory and construction You...

Страница 3: ...Capacitor marked 47 or 470 0 1 lead spacing 1 22pF C1 alternate Monolythic Capacitor marked 22 or 220 0 1 lead spacing 2 0 1uF C3 C4 Monolythic Capacitor marked 104 0 1 lead spacing 1 4 7uF C2 Tantalu...

Страница 4: ...m Note align side lead with pad on board outline C3 0 1uF monolythic ceramic marked 104 C4 0 1uF monolythic ceramic marked 104 Transistors and diodes Q1 2N3906 align flat to board outline with center...

Страница 5: ...onnector SV1 with V to pin 1 marked V and ground to pin 4 marked G Choice of C1 Capacitor C1 senses the RF signal and feeds the signal to Q2 to control switching The 47pF capacitor supplied for C1 sho...

Страница 6: ...ed NC output and a 10 ohm or so resistor from the normally open output to ground If the TR switch is embedded into another system jumper wires can be used to the appropriate pads for signals power and...

Страница 7: ...iodes D1 and D2 as well as the transistors Q1 and Q2 They should be oriented as shown on the PC board outlines Verify that power and ground are connected to Pads 1 and 4 of X1 Test by connecting Pad 2...

Страница 8: ...Schematic Easy TR Switch V3 20171212 8...

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