Mystery Simulcast Beeps on 3550 3900 6700 7050 7450 7950 23 MAY 2025 0325utc

[l0ngwire]

The half-second beeps spaced 2 seconds apart are being simulcast now on at least six different frequencies.  In CW receive mode I hear them on 3550 3900 6700 7050 7450 7950 here in central California.  Listening on several Kiwi SDRs around the US they are roughly the same signal strength.  I have heard them several times over the past year-- the transmissions last about 40 minutes.

I first noticed them on the 40 and 80 meter ham bands on 3900, 3550 and 7050.  There was a recent post on HF Underground/Facebook, which i no longer can find, by Jose Luis in South America who noticed them outside the ham bands. I scribbled down his frequencies--I could not hear all of them, but did hear the simulcast beeps on 6700, 7450 and 7950.

Any ideas?

[l0ngwire]

Update:  also hearing the beep on 3150 at 0624 UTC.

Update No. 2:  signal gone at 0627 UTC.

[burndup]

Ok, good, someone else has been hearing them. I've been hearing them for  couple weeks now.
Just this evening decided I would trace this out a  bit and make sure they weren't emanating from some equipment of mine around the house.(SoCal, IE) Came here after hearing them on Northern Utah Websdr.

I use 3550 and 7050 for CW, if this is one of the clowns building desert beacons on CW frequencies, please remove these frequencies!!

Thanks,
BBQ

[l0ngwire]

I am hearing them tonight also in central California.  I am sure they are not coming from a low power desert beacon as they are heard all over North America and even in South America,

Tonight while listening to my own receiver on 7050 and using a nearby Kiwi SDR, I heard them simulcast on lots of non-ham frequencies:
3150, 4200, 4525, 6700, 7450, 7950, 8700, 9100, 9375, 9500, 9950, 10625, and 11200.  HF was very quiet tonight and it was fairly easy to spot the beeps with a Kiwi SDR set to wide steps.

First heard at 0709utc, off at 0740utc.