"Lushy" wrote Can anyone point me to a site that shows how to build a
multi freq hf
vertical, thanks in advance.

-------------------------------------------------------------

You can do no better than to begin with a bottom-fed, bottom-tuned, vertical
or sloping wire, or pole or mast as high as you can manage.

For short vertical antennas of any sort a fairly good ground is needed. If
you have an agricultural or reasonably fertile garden soil with occasional
rainfall then a modest array of half-a-dozen shallow-buried ground radials
may be sufficient. Radial length need be no longer than antenna height.
Increase number of radials till you find there's no improvement in received
signal strength. Not much point in having more than 20 or 30 radials.

If you have one, you best ground radial is your domestic incoming water main
pipe.

If you have any more wire to bury in the ground then prefer to increase the
number of radials rather than length.

If you can't increase height or length of antenna any more then a top
capacitance hat can be very useful. Or take the wire sideways. Do NOT
attempt to insert a loading coil for a particular band - it will no longer
be multi-band.

If you can provide height only by taking a wire up the side of your house to
a pole on the chimney then DO IT.

A simple vertical or sloping high wire is multi-band. It is impossible for a
lower ground-mounted commercial antenna, festooned with coils to improve
upon it.

Whatever short vertical antenna you select you will need a tuner somewhere
between bottom and the transceiver. Concentrate on THAT! A home-brew with
crocodile clips can be more versatile than any expensive commercial job.
----
Reg, G4FGQ