| A funny thing happened on the way to the .......... I am sure you have heard that before. Well here is one strange thing I encountered on my way to capture the HUM. At 58.8 Hz hid just underneath the common 60 cycle power frequency. I bumped into a strange thing. I found a repeating signal. 58.8 Hz. (Close as I can get for now on frequency might be 58.5 Hz.). Modulated by a 6.6 Hz signal. I can guess that the 6.6 HZ (or 6.5 Hz.) is used as a multiplexer. With the proper frequency de multiplexer circuits any information inside the 58.8 Hz can be retrieved with little effort. I looked inside the 58.8 Hz and guess what I found? You can see the results below. Pictures with Audio links and a video link. Though this is not part of the HUM frequency that I am looking for. I am sure that it plays a roll in some of the reports we get back as HUM complaints. It has the similar diesel engine rumble and it is further modulated by the 6.6 Hz. That combination should make it just miserable to any one who can perceive the signal. Mixed with the HUM and it should be a nightmare. |
| This is 16 seconds of recorded 58.8 Hz signal that I found 'hidden' just below the 60 cycle power frequencies. |
| Here the horizontal gain is amplified by a factor of 15. You can see the repeating signal. It is beginning to look like it has start and stop points. Looks like a signal one would find at a modem. |
| Here the horizontal factor is at X 25 |
Look at the data contained between what I think is a stat and stop bit. |
| Another slice of data flow. Look at the wave forms inside. |
| Another look at the Data inside the 58.8 Hz signal. |
| Links below go to Audio slices and Video slice. 58.8 Hz signal |
| October 30, 2008 VLF reception 650 PM |
| The more I work with this odd ball signal, the more I become suspicious. My question is, is this the old 'HUM' that I have learned to love? Is it moved closer to the 60 cycle power frequency, to be better hidden? Or is this just an anomaly in the spectrum? I will know more as I prepare to go lower in frequency and look around. By the way. If this is the new and better hid 'HUM'. Someone needs a refund on their equipment. I found it with no problem at all. September 30, 2008. |
| Note: The Red and Blue traces are the same signal. Only the Blue is inverted so as those who are left brained can see the repeating signal in the wave forms. |
| After much consideration and experimentation. I am going to take the time to build the VLF Receiver circuits. Torque converted 'HUM' receiver. Magnetic 'HUM' Receiver. |
| More to come |