Clockgenerator

The Si5351 clockgenerator needs only 4 wires to connect to the ESP32 DEV board.

2 most left wires: I2C bus

Si5351            ESP32

SCL                IO22

SDA                IO21

GND                GND

Vin                    3V3

After uploading following Adafruit Si5351 example sketch, the clockgenerator generates 3 squarewaves of different frequencies:

Here you can see the signal of clockoutput #1 (13.55311 MHz) being received by my FT450:

Update 13 Dec 2020:

Clockgenerator with three dedicated output frequencies (144.060, 70.100 and 14.020 MHz) on veroboard. I used the Adafruit program 'Clockbuilder' to generate the parameters to be used in the sketch:

The signal of CLK0 output (144.060 MHz) being received on the UV-5R.

Off topic:

10 February 2021, Bommelsedijk, Zuidzijde