Start of build to 1st spot – 50 minutes.
As luck would have it, the second station to spot me was Jay W5OLF himself from 800 miles away – the maker of the kit!
The build was simple, logically-ordered and straightforward.
Stuffing the parts took 30 minutes, then wound one 29-turn toroid and soldered it in place…then attached a dummy load and 13.8V power supply, hit the board-mounted pushbutton and watched the needle of the WM-2 wattmeter swing over.
Tweaked the cap for exactly 2 watts out and then used a multimeter to set Pin 1 of the VCXO chip to 1.65 volts. This put me in the WSPR freq range without needing a freq counter, though I could have just used the main rig for this adjustment.
At the next even minute (actually 2 seconds before it) I hit the button again and, after a two second delay, a transmission began, this time into my dipole. Power out stayed at 2 watts for the entire 1min 50sec transmission after which I saw myself spotted by KC9GWK.
WSPR w/o main rig, computer, sound card interface and interconnecting cables. Not to sound like an ad (I have no connection with W5OLF other than having bought this kit – and being spotted by him) but this little kit does exactly what I wanted to do, as easily as I wanted to do it.