HF Frequency Locked Loop by IK3OIL

This design by IK3OIL has been quite popular, especially used as BITX VFO. Some Indian hams have also created a kit from these designs.

Original PDF articleDownload

Hex file for PIC16F84Download

PIC Controller PCBDownload

VFO PCBDownload

Boards mounted in tin plate enclosure

16×1 LCD Display

17m SSB exciter based on BITX-20

This is the SSB exciter used in the 17m 9H1LO/B PSK31 (USB) beacon.