[TowerTalk] top loaded vertical radial length

[LY2KZ]

Hi guys,
I tried to search TT archives but did not find an answer. Or did not 
know how to ask properly.
There is a lot of information in the books and internet about how many 
radials and how long they has to be for L/4 vertical. But  I'm going to 
erect about 22meter (~70feet?) high top loaded vertical for top band. 
The soil quality is average to good. I have 1500m of wire and guess 
25-40 radials should be a good compromise. The more radials the longer 
they are. But how long let's say 25 optimal radials for SHORT vertical 
must be?

Thank you for any ideas

-- 
Vytenis
http://ly2kz.aktv.lt