Here is the supplier I used in my auto parts store in Oregon. Every auto parts store I have been into has had some sort of parts rack like these parts. "http://www.picowiring.com/" Just another idea
Pete, As I recall you may be a Hi-Z user. If you are hearing these spurs on a Hi-Z array you may want to check all the elements. If one gets shorted or partially shorted to ground we have had cases w
So industrial plants are also exempt from the part 15 requirements but does this also mean that they still cannot cause harmful interference? Lee K7TJR OR The FCC has not generally tried to interpret
I use a ready made product that sounds very similar. It dries clear and quite solid but not glass hard. I use it to glue ferrite Binocular cores to circuit boards among other things. It is quite easy
Hi Matt, It looks and sounds to me like you are simply overloading the SDR receiver and generating the spurs and noise inside it. What level of the fundamental signal is actually being applied to the
Hi Matt, Thanks for the additional information. Even though you are filtering the harmonics from the source transmitter the SDR if overloaded will generate its own level of harmonics. Please be very
Kenny and All, I have a noise here in Central Oregon that sounds very similar to the one you are chasing. There is a wood products plant about 2000 feet from my shack and antennas. The noise is worst
Dave, You are likely overloading your walk about receiver with the fundamental 7 MHz frequency causing all kinds of blocking and mixing in the Grundig at other frequencies.. Lee K7TJR I'm out of idea
Hi Guys, The Ray Jefferson I have has both the sense antenna and amplitude control. The sense antenna simply gives it a quite deep null in a single direction of the rod antenna. I Can't recall the mo
Hi Dave and group, I find the Tiny SA a little low on sensitivity so I am planning on adding an external 20 dB preamp with an easier to use step attenuator for RFI hunting. I have some other obligati
Hi LEV Dave and the group, Indeed your comment most true. I have decided that a preamp would be the answer for me but to have the attenuator I mentioned in front of the Preamp. If I have large signal
Greetings RFI Group, I was out with the local power company just last Sunday. They heard a sparking source on their Radar engineers receiver so tried to pinpoint it with the Radar engineers ultrasoni
Hugo and all, I have looked at and tried the TinySA as an interference testing tool. The sensitivity of the Tiny Sa only goes down to -100 dBm. I was thinking at some point I would add a 20 dB preamp
Hi All again, While I am thinking of it I also tried the little radio called a Malachite. It suffers the same problems but is a bit more sensitive than the TinySA. One of these with some sort of ante
Nope Al, One of the high level repeaters in Portland Oregon is situated in a Washington state facility right across the Columbia river on a mountain top. There were at one time 46 repeaters in that f
There is another reason to consider. RFI is another form of growing pollution and what company would want to be front and center in another battle over pollution. Lee K7TJR OR. There are a lot of rea
Hi Guys Well, very interesting to me as well. I have been trying to get a VFD drive situation "Fixed' for about 5 years now. It took me a year to figure out why I could not just hear a buzz on AM for
This sounds to me very suspicious of the apparent digital electronics in the PDU switch and not the fans. Try an incandescent light bulb as a PDU load and check for the noise. Lee K7TJR Dear friends,
Hi Folks, A few years ago we had a large carrier showed up on 160 meters. After N6TR found the guy near Seattle he found out the guy was running tests with another station using a very slow CW mode.
Hi Charlie and all, John Fluke company has some new equipment that senses IR and I believe they add ultrasonic for their new remarkable sensor capable of use with power lines. " https://www.fluke.com