CLASSIC 80M TRANSMITTER FOR RADIO ORIENTEERING
The 80m TX described here is the well known ON7YD ATX-80 and timer, combined in a standard aluminium enclosure.
For a full description of this excellent design visit the ON7YD web site
The PIC timer and RF circuits have been combined and a PCB designed to fit a standard AB28 folder aluminium box.
The AB28 box is ideal because it neatly accommodates a 10xAA battery pack with the main PCB above. In operation, the unit is placed in a plastic bag and hidden under leave mould. A plastic storage box, or plastic pipe might be other weather proofing alternatives.
Using a slightly wider aluminium box Type AB23 This allows the inclusion of a simple toroid matching device, in the enclosure.
For details of a suitable 80m ARDF Antenna click here
VERSION-3 PCB dated 12:09
- Circuit Diagram
- Enclosure Details (not available)
- Board Layout
- PCB template for Press-n-Peel
- Parts List