Carrier blocking all WWV stations?

[bsw...@gmail.com]

I used to be able to tune in to WWV (2.5, 5, 10, 15, 20MHz) but recently every one of them is drowned out by a strong carrier at those frequencies. There is also a strong carrier at 25, 30, and 35MHz. Anyone have an idea? I've tried relocating the antenna and SDR (Airspy/Spyverter) but nothing helps. Reception is fine on other frequencies.

[Richard Bown]

If its that strong I would be inclined to start by turning off things at home , if you can run on batteries, just throw the main house supply breaker, and when it disappears

look for the offending device .

HTH

Richard

On Mon, 2022-06-27 at 08:24 -0700, bsw...@gmail.com wrote:

I used to be able to tune in to WWV (2.5, 5, 10, 15, 20MHz) but recently every one of them is drowned out by a strong carrier at those frequencies. There is also a strong carrier at 25, 30, and 35MHz. Anyone have an idea? I've tried relocating the antenna and SDR (Airspy/Spyverter) but nothing helps. Reception is fine on other frequencies.

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[Robin Gape]

Try using a portable SW radio to locate the source of the offending signals. Some VHF/UHF handhelds offer SW reception. At 2.5 MHz or 5 MHz a ferrite rod aerial (loop antenna) works well and is directional.

Have you recently changed something? Perhaps a connecting cable, new TV, router, laptop, GPS receiver–most things electronic could be guilty, really. That includes white goods and solar panels. Could be you or a neighbour.

For the SW receiver using a portable laptop, plus good quality USB cable (preferably with ferrite chokes on), plus a short antenna wire may help in tracking down the source.

Good luck, 73,

Robin, G8DQX

On 27/06/2022 16:24, bsw...@gmail.com wrote:

I used to be able to tune in to WWV (2.5, 5, 10, 15, 20MHz) but recently every one of them is drowned out by a strong carrier at those frequencies. There is also a strong carrier at 25, 30, and 35MHz. Anyone have an idea? I've tried relocating the antenna and SDR (Airspy/Spyverter) but nothing helps. Reception is fine on other frequencies. --

[bsw...@gmail.com]

I tried a Grundig shortwave radio... No problem tuning in WWV. My neighbor just installed an EV charging station to their solar inverter, maybe that's it or else my Airspy is failing. I tried SDR# on a different Windows PC and the interference is still there.

[bsw...@gmail.com]

Problem solved... Faulty ground.

[Dave Baxter]

Good news.

What "Ground" was faulty & where.  Plus how did you track it down?

That info can hep others with similar trouble in the future.

Best Regards.

Dave G8KBV

To view this discussion on the web visit https://groups.google.com/d/msgid/gqrx/0649f15f-1b1e-40dc-9eff-398342e112c8n%40googlegroups.com.

[bsw...@gmail.com]

Correction. The carriers are still there. I did some web searching and found that the early version spyverters internal clock can cause these carriers at the same frequencies.