Since I got my HF radio a year and change ago, I've been able to hear very little except noise and the WWV time station on 10MHz. Noise seems to vary by band, but not how I'd expect:
- 80m: S7-S9
- 40m: S9+10-20
- 20m: S2
- 15m: S3
- 10m: S9
- 6m: S5
My antenna is fairly low above my house, but even killing mains power didn't reduce my noise level by any noticeable amount. I tried plugging in my 2m J-pole and it - being basically deaf on all of these frequencies - had predictable low noise on all bands, with none above S3.
- The feedline for my 2m antenna has a similar-but-physically-separate path to my transceiver than the HF dipole does.
- The dipole is only about 15 feet in the air on the low side and 25 on the high side.
- The dipole, transceiver, and tuner aren't grounded, but any ground nearby would be ~20' from short 5kV power lines that run along one edge of my property. The power lines are parallel to the dipole and the dipole is currently in the only place that I can put it on my property. I've heard that putting ground rods in our soil is miserable and haven't done it yet.
- I live in a suburban environment.
Does my conclusion that the noise is likely to be coming in through the antenna make sense? Should grounding make a difference? What steps can I take to try to mitigate the noise?
Suggestions so far are basically:
- Classic foxhunt with a small AM radio
- Hitting powerpoles with a stick/mallet/sledgehammer (seriously) and seeing if this affects the received noise.