Hi

I have not had much success with a commercial tri band 6M/2M/70cm
vertical. I hope you know the type I am refering to, 2.5M high with
three radials, looks like two for 70cm and one loaded radial for
6M/2M.

I have never had any success with this antenna in the attic so did
some experiments with the antenna on a 8 foot glass fibre pole in the
garden. SWR and radiation were perfect until I rotated the antenna
with the loaded radial facing the house about 20 feet away, then SWR
climbs to 10:1 on 2M but is still perfect on 70cm ???. Not tried 6M
yet.

Any idears whats happening ?.

Tia

Dio