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This is a keyer selector designed for situations where more than one operator is on a band. It also provides an interlock which allows a multiplier station to be used in M/2 operations. The unit is designed primarily for CW keyer selection but it can also be used for phone PTT selection or for mixed mode where one radio is used for CW and another for SSB. Figure 1 shows the Keyer Selector connected in a multi-operator two radio (MO2R) configuration. Amplifiers and antenna switching are not shown. Each operator has a computer and a keyer. Either operator can transmit through one or both radios. |
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Figure 1. MO2R The keyer selector can also be used with a single transmitter and a receiver (MO1.5R) or just one transceiver (MO1R). Project DocumentsKeyer Selector SchematicThis is the schematic of the keyer selector. The current version is 1.0. Keyer Selector Parts ListThis is the parts list with part numbers from Mouser. Keyer Selector FirmwareThis is the firmware for the microprocessor. Keyer Selector Source CodeThis is the source code for the microprocessor, written in C. Keyer Selector Construction NotesThis contains information about the keyer selector boxes I have built. Key Selector InstallationThis describes how to connect the Keyer Selector to a station. Keyer Selector OperationThis describes the function of the various switches and LEDs.
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