This is PART 4a (there is a part 4b below) of the project “Arduino Frequency Display For a Kenwood TS-520S HF Ham Radio”. This part covers switching to a new front end circuit as seen used by the DFD2 frequency counter from “Almost All Digital Electronics”. Their website is http://aade.com/DFD2inst/DFD2inst.htm

Links to all parts: (PART 1), (PART 2), (PART 3), (PART 4), (PART 5)

(PART 4A)

This is PART 4b of the project “Arduino Frequency Display For a Kenwood TS-520S HF Ham Radio”. This part covers testing the circuit and frequency counter software when connected to the Kenwood radio but still on a bread board. The final display is not ready so in this video I simply push the frequence counts to the laptop.

(PART 4B)

Here is the datasheet for the PLL chip I used in (PART 4). Other datasheets can be found in (PART 1).

74HC4046 Phase-Locked Loop with VCO (PDF)