Topband: Multiple verticals one feed-point.

Clive GM3POI clive at gm3poi.com
Wed Sep 19 16:48:23 EDT 2018


Gary as long as the verticals are isolated above ground when not switched
in. You should be ok. 73 Clive GM3POI

-----Original Message-----
From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of Gary
Smith
Sent: 19 September 2018 20:35
To: topband at contesting.com
Subject: Topband: Multiple verticals one feed-point.

My HF antennas are all wire verticals; 20M 
vertical, 30M vertical, 40M vertical, 80 
INV-V & 160 sloper. Using the Ameritron 
remote coax switch it allows me to select 
one of these antennas and this allows a 
match to everything from 160-6 except for 
60 meters which I don't use anyway. All 
are connected to the radial plate which 
has maybe 40 or so 130' long radials. I 
use the 160 sloper for 160, 12, 10 & 6M (I 
now have a 7 el yagi for 6M)

This latest thread has me wondering about 
what would be likely to happen if I didn't 
use the coax switch and instead ran all 
the wires off a common feed-point? The 
only think I can think of that jumps out 
at me is the possibility of harmonics. 

Perhaps harmonics are not an issue? I've 
long used a 40M antenna for 15M as well 
with no complaints. I used to use a 
Mor-Gain antenna as a Novice & General and 
it was a multi band dipole which seemed to 
work fairly well, but in the sunspot cycle 
peak back in the late 70's a coat hanger 
would let you work DX. 

73,

Gary
KA1J

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