Board Thread:Questions and Answers/@comment-109.128.29.166-20150430124057/@comment-26154973-20150509215545

Well, at least there are reports like that:

http://kancolle.wikia.com/wiki/Development#comm-248540 (171 attempts)

http://wikiwiki.jp/kancolle/?%B3%AB%C8%AF (in comments, more than 200)

All you will hear is that it is "bad luck".

Prioritize getting radars from stock equipment of Kai and Kai Ni ships then (if you not already) and keep trying for 32 and such from time to time (maybe the "luck" will change).