I'm making my first ventures into HF with a Yaesu FT-450D and a homebrew 20 Meter inverted-V antenna a local ham helped me set up.
I've noticed that the 20 Meterm band seems to have lots of background noise (QRN) everywhere in the band.
The S-meter is sitting at 7 constantly.
By comparison, 30m is at 5, 40m is 1, and 10m is at 1. Of course, this is connected to the same 20M antenna.
Is this amount of noise normal, or am I more likely picking up something nearby that means I should change my antenna setup?
Additional notes answering comments
- I'm near Saint Louis, MO.
- Noise has been steady at this level as long as I have it connected to the antenna. No change between daytime and evening.
- It sounds somewhat similar to static you might hear on old analog TV stations, or AM radio sets. It does not sound like a 60hz hum.
Resolution(ish) - Confirmed with a local ham that when 20m is dead, he reads background noise less than S1.5 at the most with his setup. - Powering down the entire house (all breakers off) and running the radio off the car brought noise down to S3 or so. - Investigation into individual breakers eventually led to my Uninterruptible Power Supply units. I have 5 in the house on 4 different circuits. Powering each one on individually incrementally increased the base noise level from S3 (all off) to S7 (all on).
So I will research eliminating noise from UPSs separately (and probably asking a separate question). I will also be adding a 1:1 choke as soon as I can build one.