WSPR: Beginner's Luck?

I had to confirm my MP3 WSPR assumptions with an on-the-air test. With the family permission I erected the antenna (base loaded horizontal monopole on the balcony), plugged the MP3 pen to the FT-817 and pressed the "Play" button at the +/- correct moment. No GPS or any real-time clock sync method was involved.

Output power was in the 0.5W ballpark, perhaps less since I was careful not to overdrive the FT817 SSB circuitry (50% ALC). FT817 uses ALC to control output power, so I need to measure it (another day, please).

On the wsprnet.org website, where WSPR spots are uploaded in real time by some kind listeners, my call appeared at 4 macro-distances: 8, 1000, 2000 and 19000 km away. 19000 km means New Zealand, The Antipodes from here.

What's Next? Either setup a WSPR Moon receiver or build an independent DSB/SSB transmitter.

One thing to mention. In this experiment I ran a 100% TX and 0% RX. I transmitted for 2 hours without breaks, except for few seconds between each sequence. This can be relaxed adding 2 minutes (02'00.00") of silence in the WSPR audio file.

	Call	Frequency		Drift	Grid	dBm		by	loc	km	mi
	IK1ZYW	10.140117	-18	0	JN35tc	+27	0.501	OH3QN	KP20tx	2121	1318
	IK1ZYW	10.140117	-21	0	JN35tc	+27	0.501	M0DUO	IO91kw	995	618
	IK1ZYW	10.140130	-15	1	JN35tc	+27	0.501	IK1JNS	JN35sb	8	5
	IK1ZYW	10.140127	-19	0	JN35tc	+27	0.501	EB1APK	IN73bg	1094	680
	IK1ZYW	10.140168	-26	-2	JN35tc	+27	0.501	ZL3IN	RE66hk	18812	11689
	IK1ZYW	10.140131	-24	0	JN35tc	+27	0.501	G4KYA	IO93ln	1129	702