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Pacific Antenna - Easy TR Switch
Kit Description
The Easy TR Switch is an RF sensing switch that can be used to switch an antenna between a receiver
and transmitter. It also has a second switched pair of inputs and outputs that can be used for other
switching applications such as muting or switching an audio channel or even to switch a remote
amplifier or pre-amplifier. It can also be operated manually through use of control lines to disable the
automatic switching and to control switching through grounding a control line.
It also has a control lines to disable automatic switching and to manually switch between outputs.
Features and Specifications
Provides automated or manual switching
Two independent sets of inputs and outputs
Automatic Rf sensing
Switches with as little as 100mW of RF
Frequency range of 160-6M
Power handling of up to 150 Watts
Manual switch mode available
Small, 2 x 2 inch module
Support
PACIFIC ANTENNA
QRP KITS.COM
qrpkits.com@gmail.com
Easy TR Switch 20170209
1
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Summary of Contents for Pacific Antenna Easy TR Switch
- Page 1 Kit Description The Easy TR Switch is an RF sensing switch that can be used to switch an antenna between a receiver and transmitter. It also has a second switched pair of inputs and outputs that can be used for other switching applications such as muting or switching an audio channel or even to switch a remote amplifier or pre-amplifier.
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Page 2: Tools Needed
□ DO NOT use a large soldering iron or soldering gun. □ If you are a beginner, new to soldering, there are a number of resources on the web to help you get on the right track soldering like a pro. Google Soldering Techniques. Easy TR Switch 20170209... -
Page 3: Parts List
Tantalum polarized capacitor, marked 4u7 or 475 2N3906 PNP Transistor BS170 N-Channel MosFet Relay Axicom V23105 12V relay Circuit Board Typical Parts Appearance Note: Some parts may vary in appearance from those shown here due to source changes. Easy TR Switch 20170209... - Page 4 22pF or 47pF or 100pF monolithic capacitor (use 47pf for most bands from 80-20M) 4.7uf Tantalum Note: align + side lead with + pad on board outline 0.1uF monolythic ceramic, marked 104 0.1uF monolythic ceramic, marked 104 Easy TR Switch 20170209...
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Page 5: Features And Operation
In general, increase C1 for lower frequency operation and decrease it for high frequency use. The supplied 47pF capacitor should work over most bands from 80-20M. The kit also includes a 22pF and 100pF for improved performance on bands outside this range. Easy TR Switch 20170209... -
Page 6: Board Connections
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. Easy TR Switch 20170209... - Page 7 Pin 2: K; External keying control line. Ground this pin to key the TR switch manually. Pin 3: B: Bypass control line. Ground to disable automatic switching for manual keying. Pin 4: Ground for power, control and key signals Easy TR Switch 20170209...
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Page 8: Troubleshooting
Troubleshooting The Easy TR switch is intended to be easy to assemble and should operate without any problems. However, if it fails to operate, there are a few things to check: Check the board for cold solder joints, these will appear rough rather than shiny. If in doubt, reheat connections to ensure a good connection. - Page 9 Schematic Easy TR Switch 20170209...