|
Posted by Robert, VA3ROM [ va3rom@gmail.com ] on December 18, 2022 at 06:30:23.
In Reply to: Re: Airspy HF+ Discovery posted by swlem3 on December 17, 2022 at 19:36:25.
|
I'm rather fortunate that I don't have the kind of noise issues that you have but there are "black boxes" with small receiving antennas that can be used such as the MFJ noise cancelling signal enhancers. The idea being to stop the RFI before it gets into your receiver's front end. In my case, I now use a hefty 65 AH, 12 VDC AGM battery (it's a hefty 25 kgs!) connected to a 13.8 VDC 3A linear power supply via a charge controller. It's an old trick learned from an electronics technician co-worker. The AGM battery handles the current needs and removes a lot of RFI acting like a really large ersatz filter capacitor while the small linear power supply provides the required 13.8 VDC. I use West Mountain Rig Runners to plug in my 12 and 13.8 VDC equipment. Our house wiring is also a great antenna system that will pick up and/or radiate EM signals so my computers and monitors and laptops are powered by true sine wave UPS and filtered by their internal batteries to effectively disconnected them from the house electrical wiring. I have a desktop and several laptops sitting right next to my receivers without any RFI issues. Anyway, just my two Canuck cents worth. 73,
Robert
|
Follow Ups:
|