The biquad can be found at
http://martybugs.net/wireless/biquad/ I actually
mounted the small USB adaptor immediately behind the reflector and removed
the USB antenna and used a short piece of coax to the base of the antenna
feed where it came out of the brass tube at the rear. Total coax length was
about 2 inches so losses were really minimised.
The omni is from
http://www.guerrilla.net/reference/a...ollinear_omni/ and was
followed closely. Without the US quarter, I used a brass washer and the
overflow pipe was a piece of 3/4 inch copper tube out of the scrap bin. In
my case, an 18 element omni was constructed so that the radiation angle
would be low, an important consideration in the terrain to be covered
without extending up the surrounding hill areas. I suggest that you may well
suffice with one of a few less elements, say 10 or 12.
Generally, dimensions are reasonable critical for correct performance but a
decent soldering iron, a fine hacksaw and a Dremel tool made short work of
the job. It is necessary to use LMR-400 cable for the omni as other types
have differing characteristic that will change the lengths of each section.
Simple, cheap and very effective.
Peter
"The Chairman" <(E-Mail Removed)> wrote in message
news:Xns969AB59CA5C1monsterearthlinknet@140.99.99. 130...
> "Pierre" <(E-Mail Removed)> wrote in
> news:dbmdij$n7f$(E-Mail Removed):
>
> > All the antennas were homemade. The omni is made from a series of 1/4
> > wave sections of brass tube and the client antennas are biquads. Total
> > antenna cost less than $40 for the omni and 4 clients. The clients all
> > have USB adaptors mounted on the antenna to reduce cable losses as USB
> > cable is cheaper and does not incur the same loss.
> >
>
> I'm sure with some searching I could find it, but do you happen to have a
> link that would show exactly what you made and how you made it? I am very
> interested....
>
>
> Thanks!