Topband: Hygain 18HT feed question

Tim Duffy k3lr at
Tue Jan 9 21:13:04 EST 2018

Hello Frank:

I am not sure if you are talking about the 18HT on 160 meters? Because you
posted on the Topband reflector I am assuming so?

The 18HT is a 51 ft vertical that requires loading to have a chance of
working on 160. There two methods - a base coil or a side coil (from the top
of the 24 ft tower) with additional wire.

Neither of these methods will work great on 160 as the 18HT is just too
short. This system has negative gain on 160 meters. You can work guys wit it
- but it does not have great performance relative to a full size quarter
wavelength vertical.

To have any shot of some success you need an extensive radial system.

Match it at the base and feed it with 50 ohm coax to your radio.

Good Luck and 73
Tim K3LR

-----Original Message-----
From: Topband [mailto:topband-bounces at] On Behalf Of
kg9hfrank at
Sent: Tuesday, January 09, 2018 5:06 PM
To: topband at
Subject: Topband: Hygain 18HT feed question

I cross posted this in he QRP but then it dawned on me you folks may have a
better insight to this question.

I finally snagged my dream antenna, a Hygain 18HT!
Yes after almost 50 years.

So here is the question..

Should I feed the base with:
-75-ohm coaxial cable (I can get some of that easily to bury about 100' from
the house?
-use an auto-tuner at the base or feed it like they say and feed it with
50-ohm also 100' from the house.


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