Hal Rosser wrote:
I've seen a setup of 3 phased verticals (in a 60degree triangle space)
where - with the help of switches, relays, and various lengths of coax, the
operator could choose any of 6 directions with a switch, then the relays
would cut in appropriate phasing lengths .

G3HCT (now VK4OQ) used this system for 40m. By phasing any pair you have
a choice of six 2-element beams, with the third element inactive
(open-circuit).

The gain is about 1.5dB lower than a four-square, comparing both beams
in their best (forward) direction, but the triangle has more directions
to choose from, so in some directions it's actually ahead of the 4sq.

The verticals were quite closely-spaced, and phased to give *two*
rearward nulls at around +/-120deg. That gave a total of 12 switchable
nulls on receive, which can be very important in European QRM.

The wiring of the relays would
keep me busy for quite a while.

Four DPDT relays take care of everything.

Heck - grandma used to keep us occupied by putting molasses on our hand and
giving us a feather

'Eck - i' Yorkshire we only had... [insert rest of Python sketch here].


--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek