Rain gutter: i sometimes use my (horizontal) rain gutter, with its two
vertical downspouts, as an antenna, at low power such as for WSPR. I feed
it with a 9:1 balun (for 20 meters) and with a 1:1 balun (with an added L-C
match) for 40 meters. Inside the apartment is a 10-meter-long radial on the
floor.
It's not my best antenna of course but it works somewhat, especially on
20-meter WSPR.
I used the nanoVNA to check it out. Also SimNEC. ... On 14 MHz and higher
(HF) with the 9:1 it is fine. I use only about 5 watts into it, because the
feedpoint is not bolted to the metal gutter. The wire is wrapped around a
lag bolt which i screw into the tight space between the gutter and the
wooden eaves. Every so often i turn the lag bolt and squirt some oil into
the joint.
I would say it's not much better or worse than my indoor mag loops at 5
watts.
Orrin WN1Z
El vie, 21 mar 2025 a la(s) 12:36?p.m., Barry K3EUI via groups.io
(k3euibarry@...) escribió:
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* Multi-Band HF Vertical*
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*In an effort to get a VERTICAL ANTENNA up for the 20/17/15/10 meter
bands, I tried setting up a 14 ft vertical antenna*
*made from old aluminum tubing, mounted 3 ft above ground, adjacent to a
20 ft vertical aluminum rain gutter - mounted just inches from it for
close coupling.*
*Set up three radials - two were 13 feet and one was 33 ft. **No
matching of any kind.*
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*Results were surprising as the rain gutter makes this vertical into a
reasonable multi-band vertical for 20/15/10 meters.
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*Cost was almost nothing.*
*Fed with 50 ft of RG8X and a coax choke at the input to the antenna
terminal.*
*I'll have to try it out this weekend on 20/15/10m digital and see if it
radiates a low-angle DX signal.*
*de k3eui barry*
Barry K3EUI
