The SI4133 as a Beacon source and Keyer

Source code for 1296.5  Has My Call and Grid !

Hex file

No changes are required on the board. I am driving a M67715 as the next stage, so I used an 11 db attenuator at the synthsizer output. This gives about +9 DBM out of the ABA32563. No filter is used, so the traces are jumpered to the connector.

The frequency switches were already mounted, but now they do not do anything. Keying is held and the LED is turned on if  lock is lost.