I had a theory that if other civilizations were to attempt long range radio communication, it would be done on the Hydrogen Line 1420 mhz with circular polarization.
I built a pair of rotated Yagi antennae in opposite handed circular polarization, i.e., one left one right, and mounted them 90° out of phase. This would provide the highest possible signal to noise ratio for a circularly polarized transmission.
I aimed them into the sky using a equatorial mount from an old telescope trained on the Sagittarius constellation, a known location for “unexplained” radio emissions (see “WOW signal”). I monitored this frequency using an old surplus Conifer MMDS TV down converter and configured a simple National Instruments Lab View application to alarm and record when a “repeated” signal occurs, demodulated from AM, FM, USB, LSB and phase shift modulation schemes synthesized in the computer.
This recording was captured during the evening of July 27th, 2014, coincidental with a coronal hole event. Most likely the magneto-structure of thIS solar wind caused an lensing effect to focus the signal, raising it above the normal background noise level.
This is an FFT of the signal, with a closer look at the “repeating pattern” highlighted in blue in the lower view, this pattern had repeated twice before the signal faded into the noise level, not to be seen again:
It not an astronomer vum says a advanced amateur space dxer....i had a shortwave one time lots of satellites transmitting? Wonder how they think its a intergalactic signal if its not able to be decipher then? Best to normalize this its loud! Interesting sounds thou!