Had an interesting opportunity last night. Station is currently an Icom 756PROIII with an inverted L like (30ft vertical, 50ft to the side fed at the base through a SGC-237 autocoupler), and a 20M di
Your proposed solution is based on the assumption (almost certainly false) that the noise you hear is coupled into your home on power lines. The FAR more likely conclusion to be be drawn from your ob
The best solution in these cases has appeared to be *and* rather than *or*. Filtering the incoming AC should help, directional antennas can help, a nulling system can help, digital filtering can help
I'd be interested in seeing a circuit diagram justifying this advice. 73, Jim K9YC _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mail
Every computer I own, and several other devices in the house, has one. I doubt they added the cost and bulk for no purpose. The incoming Ac filter can do no harm and very possibly could mitigate some
Dollars extracted from one's pocket to pay for something that does no good. Time wasted installing something that does no good. I'm still looking for the circuit diagram. 73, Jim K9YC _______________
This site is pretty good: www.mitcables.com/pdf/powerline_noise.pdf Some interesting reading here: http://www.goodwinshighend.com/ac.htm A video presentation here: http://www.furmansound.com/video.ph
Perhaps I did not state things as clearly as they could have been, but you may want to re-read my original message. 2 Antennas about 40 feet apart, the dipole about 10 feet from the closest AC wiring
Jim, I do have noise on both hot, neutral (AC grounded conductor) an by extension AC ground (AC grounding conductor). This can be easily detected with a small coupling loop from any of the AC wiring
Something else that comes to mind based on the symptoms is the grounding of the power line and your shack. The ideal is a very low impedance (very short) bond between the power system ground electrod
Since the shack is battery run, disconnecting the charger and the shack gnding bus connection to the shack ground and the external antenna removes _all_ connections to anything. Running the radio str
This is with power to you entire building killed? Main breaker? Individual breakers? What is your power system ground? What is your shack ground? How are they connected to each other? Another thought
My work involves (indirectly) alot of power work, so I have a better than normal understanding of residential AC for a non sparky. AC entrance is opposite side of the house from the shack, 200 amp se
It sure sounds like you've done all the power system right. What's your soil like? Good ground? Poor ground? Here's the connundrum. If the noise source is outside the house and it's return path is ea
About average, only real good thing is the area is marshy with a high water table, the soil below a foot or so is never dry. I have no unplanned paths, and the signal itself is weak, move away from t
OK, try this. Make that extension cord 100 ft, add the choke at the point where it plugs into an outlet, and repeat that test, going all the way to the end of the cord. Try this with chokes tuned to