Hi Alan, Great, and I was hoping you would dig out your DF gear. Make sure you are out in the open when you do additional readings with the portable flag, and make sure the peak and the null agree re
I could still hear the carrier a little before noon EST at my QTH near Indianapolis but now at 1:25pm I no longer hear it and don't hear it when using Web based SDR receivers that normally heard it d
Hi Bob, Dave (W0LEV) provided you good insight. Normally I say just stay away from wire wound resistors as we know they are definitely inductive, and carbon resistors are just fine. Any value of term
Hi Scott, You said "I have never seen broadband noise with 120 Hz harmonics in the AM audio which was NOT power line noise. And, alas, I've seen a lot of line noise." I personally have experienced br
Hi Dave, I have not but I believe it should work (especially since a diamond works). You can look at other configurations that are known to work by reading the original article about Pennant and Flag
Hi Dave, You wont yield half the noise, and its a complicated topic but I suggest you read up on whats called RDF (receiving directivity Factor) and this was a concept that I believe W8JI first intro
Quick check of it using my portable flag provides a heading of approximately 53 degrees from my QTH in Fishers Indiana at 9:40 pm EDT. As VE6JY said, probably OTHR. Just FYI, Don wd8dsb _____________
Hi Carl, A home in my subdivision 0.2 miles away from mine had an Enphase system installed a few months ago. I did park about 400 feet from his house and using my portable HF gear there was nothing o
Hi Carl, I just contacted the homeowner with an Enphase system and he would not give me permission to enter his property so I told him I would just make measurements from the street in front of his h
Hi Carl, The home 0.2 miles away in my subdivision has an Enphase system with the following specs. DC system size: 6.32 KW AC system size: 4.64 KW Module Type (must be the panels as he has 16 panels
Mike (W9RE) has been experiencing RFI on 15 meters when beaming North but not during hours of darkness. By just driving around he located what he thought was the property generating the RFI using a K
Hi Alan, Just need to work with the homeowner to identify the source. We have utmost confidence the RFI is originating from their property (we took direction finding readings from all sides of their
Hi Jim, It appears there are a lot of cellular systems in the US still using the 600, 700 and 850 MHz cellular bands in the US (4G LTE and low band 5G systems as an example) depending on the cellular
Hi Jim, Here is a link to a video of mine from 2 years ago regarding RFI at W9RE from a neighbors refrigerator and it shows what we had to do to mitigate it. https://www.youtube.com/watch?v=vDB8rAwVt
I was asked to help locate the source of RFI at N9CJT and yesterday we tracked down/identified the source to be from an AT&T (formerly Ameritech) system and all indications are that the system is VDS
Hi Jim and gang. I think everyone here is right. The point being that it really is most important to track down what property the RFI is originating from and then you can figure out exactly what devi
Hi Jim, The TinySA Ultra has a LNA (low noise preamp) that you can enable for best sensitivity. With the LNA turned on you should be in good shape regarding sensitivity for very weak signals when use
Jim, Two more quick comments. When using the TinySA Utlra its best to keep the maximum signal level into the TinySA Ultra mixer below -25dBm to prevent internal generation of spurious emissions due t
Hi Dave and gang, The DXE preamp gain is approximately 30 dB (with its attenuators turned off) until about 35MHz and then the gain drops like a rock above that point so overload from VHF and above st
Hi Pete, I suggest buying it from an approved/authorized dealer. R&L Electronics is one of the approved/authorized dealers and thats where Ive purchased both my TinySA and TinySA Ultra from. You can