Posted: 11/14/2016 6:28:09 PM EDT
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My computer monitor is close to my transceiver, I have been doing digital modes and its nice to have the radio next to the monitor. When my monitor is warming up, there is no sign of the noise. When I start the monitor and it displays the acer logo and auto search finds the input, nothing. As soon as the image shows, insane noise every 5 kHz across 20 meters and the noise is around on the other HF bands. I have tried snap on chokes on the power cord, changing from HDMi to DVI cable, and winding the HDMI into a janky air choke. No improvement.
I have googled some and not found much for a solution, just how to identify it. Any ideas? |
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I have a LG 4K in my office that is so bad it opens the squelch on my TH-F6A on several 2M frequencies from over two feet. I cannot use the scan on VFO-A at all and VFO-B cannot be closer than 18 inches or it stops scanning. The desk phone is almost as bad.
I read that LED monitors are the worst. |
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I got home from work today and turned on my HT. Huge noise around 146.910 - a local repeater. Had a squealing and seemed directional so I tracked it to my entertainment center. Pulled all the power and everything went quiet. Had S7 noise within three feet with the power on. I traced to the cable modem by powering each device up separately.
I stuffed the cable modem behind the steel cased UPS and tucked some aluminum foil around it. All better! I can actually hear and hit repeaters from my couch now without having to go outside! |
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A follow up to my problem.
I tried cheap snap on chokes but they seem to do nothing. I had improvement on some bands winding an ugly choke 1:1. This had a side benefit of lower my noise level a perceptible amount. I am waiting for Jan 7th local hamfest to get a type 31 core toroid and I have higher hopes for that. |