Thursday, May 14, 2015

UVB-76/ MDZhB/ S28 Back with Very Low Audio

On the usual 4625 kHz, the WebSDR does pick up a very weak and raspy audio tone at 250 Hz with a possible harmonic at 500 Hz.  This tone is becoming louder at 1700 UTC, and its timing and waveform are very similar to the "buzz."  Is this a lowered gain or a second transmitter?

In any event, we can safely conclude that either something's still being emitted on this channel, or that someone's playing around.

UPDATE 1717: It's definitely the same tone, just not as loud.  Conditions, lower gain, or is there actually a second transmitter as some have theorized?