VE3DNL calibrator as an audio source

 The VE3DNL calibrator was mentioned previously:

https://wb9kzy.blogspot.com/2023/07/blinking-led.html

http://www.wb9kzy.com/ve3dnl.htm

This design was meant by Glenn, VE3DNL, to output receiver calibration markers at 5, 10, 20 or 40 kHz intervals throughout the HF bands.  But the CD4060 chip has other output pins with other division ratios.  Pin 2 of the CD4060 divides by 8192.  With the stock 5.12 MHz crystal this division will output a nice 625 Hz square wave:

Here are the frequencies output with the other pins:

There are several crystal frequencies which output even Hz in the audio range:

Note that the first 3 crystals are 1/2 the frequency of the last three.

I had both 4.9152 and 6.144 MHz crystals on hand so I also tried them on the VE3DNL (pin sockets on the crystal position made this easy):

4.9152 MHz divided by 8192

6.144 MHz divided by 8192

Here are the frequencies of both the 4.9152 and 6.144 crystals output with the other pins:

The VE3DNL calibrator is a handy and versatile unit, someone should bring it back as a kit !  :)

Best Regards,
Chuck, WB9KZY
http://wb9kzy.com/ham.htm