Hi Jurgen,

> ...
>> - 26,0 kHz, modulated
> 
> Not  listed there either :-)
> ...

That's right. I'm monitoring VLF/LF since many years, 24/7. That signal at
26 kHz is a new one, transmitting sporadically since some days. My guess is
Greek or Turkey.

Most VLF/LF frequency lists are rather old. This is - as far as possible -
up to date:
http://sidstation.loudet.org/stations-list-en.xhtml

NAA is off each Monday afternoon for maintenance. DHO38 indeed has been
switched to OFF today just after the usual "Breakfast at Ostfriesland".
16 kHz is completely unknown. May be it's 16.4? What do you mean with
"keyed"; Morse, FSK, MSK or else?

Beste Gruesse aus Kiel,
Peter