It's wabun, yes: KO N NI CHI .... but I'd expect the last syllable to be "WA", not "da" or "ta". (WA would be -.-)
Originally Posted by K8MHZ
And I suppose the two dits at the end are like the two dits at the end of lots of ham QSOs: not official, but widely used.
A day without thermonuclear fusion
is like a day without sunshine.
Semper ubi sub ubi.
73 de Pat, K7KBN
CWO4 USNR Ret.