Isn't there something called wellcasing? I'm sorry to be guessing, but I
think that's what w7rr used for his foursquare.
On Thu, 30 Aug 2001, Richard Karlquist wrote:
>
> The secret to using 4 inch irrigation tubing is to never drill
> holes in it. Only clamp it using 4 inch Sch. 40 PVC pipe
> as a collar. The nominal I.D. of that pipe is 3.999 inches
> so it is a perfect fit for 4 inch O.D. tubing. Details on
> this at: http://www.karlquist.com/Irrigation/irrigation.html
>
> richard@karlquist.com
> www.karlquist.com
>
> >N6BV wanted me to write our experiences but I was too embarrassed to go
> through
> >all our blunders. Sometimes the verticals were up for only three days
>
> >We did try 4" irrigation pipe but the diameter did not overcome the
> weakness of
> >the thin wall. After more than 2 years of trying different designs we ended
> up
> >where we are now. Great bandwidth with 2" pipe.
>
> >Dick - KB1H
--
Hisashi T Fujinaka - htodd@twofifty.com
BSEE (6/86) + BSChem (3/95) + BAEnglish (8/95) + $2.50 = mocha latte
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