Two days ago, I ordered one of Jay W5OLF’s new kits for WSPR, having found it by accident while looking for something else. It arrived yesterday.
I haven’t built it yet but plan to tomorrow. With only 26 parts it shouldn’t take long to build, test and put on the air.
Here are some particulars:
- Operates on 30 meters, transmit only
- PICAXE controlled and comes pre-programmed with owner’s callsign, grid square and desired power output (315 mW – 2.5 W)
- Activated manually (by push-button) at the top of the 2-minute WSPR interval
- Documentation discusses methods that can be used to key the transmitter automatically
- Circuit board (3-3/4 x 1-1/4″) is top quality – same as you’d get from Small Wonder Labs, etc
- Documentation also includes color photos along with text describing the build, schematic and source code including info on how to reprogram the chip for a different level power output, grid square, etc
- Only 2 torroids, one of which is pre-wound
- Only two adjustments – one to peak output power & one to set freq
- For non-programmers (that’s me!), additional chips can be ordered to accomodate other power levels desired, etc…plug & play
If the quality of the circuit board and documentation is any indication, it should be a fine kit and it will be nice to have a way of operating WSPR (perhaps while afield or to A/B test antennas) without having to tie up the main station rig/computer/sound card interface.
Google doesn’t provide much info about this neat little kit but I’ll have an update tomorrow regarding its construction and operation.