Rig - Computer CW Interface

Please Note:The newer versions of my software (released after 2012) only support CW keying via your serial port (or USB to serial adapter) and Winkeyer Winkeyer provides the most consistent timing as it functions independently of your PC's processor. Since parallel ports are no longer in general use, the parallel port keying is not supported in the new C#.NET rewrite. The parallel port references are still included below for those who are using the old, VB6 versions of my software.

We have added CW sending features including real time keyboard, pre-programmed strings and wild cards to all of the logging programs. To send CW using our software, connect your computer to your rig interface device via the computer's serial port or USB to serial adapter. The software uses either the RTS Line or the DTR Line of the serial port, or pin 17 of the parallel port to send the key down command. If your PC only has USB ports, you can still use the serial module with a USB to serial adapter. The adapters are available at stores like your local Best Buy.

If you would like to make your own interface, below are two schematics for building an interface using the RTS line. Any transmitter that uses a "connect to ground to key" jack can use either of these schematics. Thanks to Bob, N3UR, for providing these schematics!



Direct Keying Schematic
(Resistor value is 4.7k)




Optic Coupling Schematic
(Electrically separates the computer from the radio.)





Parallel (Printer Port) Schematic
Please Note: Since parallel ports are no longer in general use, the parallel port keying is not supported
in the new C#.NET rewrite.



Flex Radio users, please note that you don't need a hardware device to key CW. Tim N9PUZ sent along the following configuration steps:

- In the Flex CAT Control application you add a virtual serial port and for the type you choose "Winkeyer" from the menu. It will create a new port and assign it a COM Port number. Close the CAT Control.

- In the N3FJP logging program set the CW Transmit up to use a Winkeyer and provide the COM port number from the previous step.

- That's it! No Winkeyer or interface needed. The Flex CAT control emulates a Winkeyer.



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