I was surprised to see MY OWN call sign and decode appear in the decode window, history window, as well as corresponding signal trace on the spectrograph!

Not considering unlikely things such as reception of my own LDE (Long Delay Echo) or some other amazing effect... or someone using MY call sign, XMIT frequency and power settings, or recording my beacon and retransmitting it, what could account for this strange event? It has happened on three different occasions.

My only thought is that, if WSPR allows for full DUPLEX decoding with duplex sound card, that I may be getting some over modulation or cross talk between the input and output. BUT that does not explain how my decode is appearing AFTER my 2 minute XMISSION. (I have photo of the screen shot I can send to anyone)

I have searched WSRNnet and there does not seem to be an UPLOAD for these decodes.

I have seen info on how double decodes can happen for a rcving station, when the beacon station is over modulating- but that is not what is happening here. I am seeing and decoding a signal exactly as I am beaconing, and it is in the proper 2 minute sequence and info etc. Signal strength is -2dB...loud.

I do not think anyone would use my station info to set up their own beacon, intentionally or otherwise. Has anyone had this happen or know the cause? I had not been in the shack at that moment to "hear" speaker copy, so I can't say what is happening "real-time"

Is the mother-ship acknowledging their reception, as in the movie CONTACT?

Thanks
Greg
VE3FAX

While setting up for WSPR ops- the first time in a long time- I noticed a lot of "racket" (noise) just before and after the WSPR program transmits its audio tones.

Some further observation found that; regardless of the WSPR program, my FT-857D (s/n 4J31...) makes a great deal of audio noise in transmit mode. The noise is obvious, when all audio input is turned off or unplugged. With the mic gain turned down to zero, or mic unplugged etc., and the RF power output tried at various levels, the noise is heard in a nearby monitoring receiver. (Even XMITR turned right down to its lowest output setting of 5 Watts still produced the noise)