I have a rfi noise that is throughout the entire shortwave spectrum
(0.1-30 mhz) at about an equal strength - it occurs approximately
every 60 khz (and sometimes every 30 khz).

The noise is very strong - S9 - S9+20 db, on a very short antenna (6
feet) to my Drake R8, despite my radio being 25 feet or more from the
noise source. The noise comes from a nearby appartment.

The noise is 24 hours/day and has been going on ever since I moved
(over 1 year). It occasionally drops in strength for 1 second. A
couple of the noise spurs have a beep noise that is happening once per
second (could it be some kind of clock/timer?). It generally sounds
like a digital hash (eg more of a hash than a buzz sound).

I'm wondering - what kind of device would produce this noise?