I've been just scanning through the HF band at night seeing what all I can pick up, and I'm trying to figure out a particular signal. I'm using a VHF discone, which isn't ideal, but it works well enough for simple reception with an RTL-SDR.
22.695mhz. When I tune in the evening (roughly midnight UTC) here in Baltimore, MD I receive an AM broadcast in Japanese that a friend tells me is NHK World Radio. The station goes off the air after a bit, but then came back a few hours later the other night broadcasting several hours of pro-Cuba and pro-North Korea propaganda in English.
What is also strange is that the specific frequency seems to deviate by a couple kHz over time.
The contents of the broadcast, the unusual frequency I'm receiving it on, and the slow shifting of the frequency has me very curious where this is coming from and why I'm receiving the signal where it is.