TPU - General Discussion

[BEP]

@ZPE

Yes. It flatlines when the probe is shorted to scope ground. I first suspected the signal was being generated by the scope. I have a very good handy-talkie with a general coverage receive in it. The range is 100kHz-1.3mHz. I cannot find the signal with the radio either with the normal rubber-duckie or a length of wire.

There is a second signal associated with the first. It appears as a very periodic pulse with long tapered oscillations attached. Amplitude ramps down slowly and drops to nothing suddenly after almost 500ms. The only way to see the shape of this one is to slow the trace horribly. I need a digital scope with storage to measure correctly. This signal appears about every 4-5 seconds.

I'm starting to think this is some kind of man-made time signal. I only see these signals with these coils as pick-ups. I don't even see them with my 80M dipole. Tonight I'll connect one of these coils to my radio and see if I can recognize the modulation type. If I can see it with the radio maybe I can localize.

[innovation_station]

hey guys what is rotatinal current??


hummmmm...

ist

[duff]

.

[BEP]

Thanks for that info. It is a possibility but the soldering iron and every electrical device in my house was dead -- hmmm... there are some devices that are battery powered.... Co2 detector?

I'll find out tonight - most likely a ground loop or neighbor's toys 

EDIT>>>>

Well, I found it. The source of the signals and likely the extra power I was seeing in my last looped experiment is my laptop!. Don't ask how. I don't know and I'll not take it apart to see why. I think I need to do another EMI survey since my last bench rearrangement.

[BEP]

hey guys what is rotatinal current??


hummmmm...

ist

@Is

That's a pretty broad question. I suppose it could be like saying water flowing through a coiled hose.
Some say it may also include the water spinning while travelling through the same hose.

I believe an electric field rotates while travelling when surrounded by a magnetic field. I'm starting to believe the electric flow and spin can happen because of a surrounding magnetic field. I think the usual thought is the stronger the magnetic field the faster the field rotates.

Hope that helps some.