no reception above 9 MHz. why?

[wenzeslaus]

I am getting absolutely zilcho above 9 MHz. not even WWV. only static. this is extremely unusual. I checked a station from kiwisdr.com and stations were appearing but greatly reduced in strength.

the space weather at swpc.noaa.gov says

G2 (Moderate) Geomagnetic Storm Watch Valid for 11-12 Nov
published: Thursday, November 09, 2023 22:08 UTC
A CME associated with an eruption near S15W15 at 09/1115 UTC is expected to arrive at Earth around 1800 UTC on 11 November.

however, R, S, and G are all 'none' at the moment.

could we be having the CME right now and the conditions haven't been updated yet? would an intensity of G2 ("moderate") cause such a blackout above 9 MHz? or what might be going on?

 

[sunwave]

I am getting absolutely zilcho above 9 MHz. not even WWV. only static. this is extremely unusual. I checked a station from kiwisdr.com and stations were appearing but greatly reduced in strength.

the space weather at swpc.noaa.gov says



however, R, S, and G are all 'none' at the moment.

could we be having the CME right now and the conditions haven't been updated yet? would an intensity of G2 ("moderate") cause such a blackout above 9 MHz? or what might be going on?

First thing to do is have a bottle of 95% rubbing alcohol and Q-Tips and some canned air or a air nozzle on a small compressor hose.

Disconnect all coax and antenna.

Blow out all connectors.

Dampen Q-Tip with the 95% rubbing alcohol. Clean out the center conductor and threaded outer conductor on all connectors. If they turn black then use the other end of the Q-Tip with the 95% rubbing alcohol. If both ends are black then use a new Q-Tip. Repeat until no black stuff on Q-Tip.

Turn on your multimeter to continuity/diode mode. Coil up the coax so you can reach both ends. Touch both multimeter wires to both ends center conductor. Gently tap the coax to see if the sound on the multimeter breaks. If it does then that's the problem. Replace the coax.

Check continuity of balun and wire antenna with multimeter.

 

[G7RUX]

If signals are received below 9MHz and not above then it is likely that propagation is in play.

 

[wenzeslaus]

it was the propagation. came back the next day.