This weekend during the annual 160 meter International Contest I experienced heavy interference on 1.840 MHz, up to 18 dB above my noise floor from 1.835 – 1.845 MHz, and knocking out some ten (10) lanes of potential CW operation during a once per year international operating event.
I also regularly encounter this same type of interference on 40 meter CW at 7.045 – 7.060 MHz where SKCC members and others operate slower conversational CW with straight hand keys/bugs and often antique radios. This is a small area of the band where CW skill building is commonly taking place – until you plop a 10 KHz wide noisemaker there.
In all cases this digital interference sounds like what I hear on 50.3 MHz – which is why I think it is the new modern digital modulation which some misinformed folks say causes no interference to other operators. I do agree that up on 50.3 MHz this causes no interference to the Beacons, CW, and SSB operation.
I have already written Bob W1YRC about this growing interference problem, and asked for escalation.