Brokken Spectre
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Registered: 03-2021
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45m Antenna Portable Use
Hi everyone, I've been freebanding since 1979 on 11m but have little knowledge of the other bands.
Wanted the benefit of the experienced HF operators on an easily portable antenna for ideally 86m and 45m something that could be set up from a vehicle. I've got a mag mount for 45m but obviously would have limited capability and a wire seems like it would take a lot to set up for portable use
Was wondering about a HF fibreglass vertical such as the Sigma SE HF 360 (80 to 6m).
Wondered what more experience members would advise on a vertical or do you really need a horizontal wire?
Thanks for your help
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27/Mar/2021, 9:38 am
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43RC982
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Re: 45m Antenna Portable Use
I have been using one of these for the last few months. 11m rx and tx are way down on what my stationmaster does . I has great SWR on just about all the other bands and has very good ears. Due to a back injury, I have been unable to get it more than 4m above the ground but it is working surprisingly well.
https://www.dxengineering.com/parts/cma-cha-250b
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29/Mar/2021, 10:45 pm
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Brokken Spectre
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Re: 45m Antenna Portable Use
Thanks for your reply. I will look into these
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31/Mar/2021, 9:22 pm
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MrFidget
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Re: 45m Antenna Portable Use
I’ve had reasonable success with 7MHz using a top loaded 5’ fibreglass whip I home brewed from an AM/FM whip. The bandwidth is tight, as in 100KHz but the performance is acceptable with contacts as far as 1000Km during the day and over 3000Km RBN 30dB spot at night on just 20 Watts
86m is going to be a real struggle for mobile ops.
Get a NanoVNA. They are great at working out what your antenna is doing and getting it to resonate and helping you find a match.
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27/May/2021, 11:17 pm
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Hot Fusion
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Location: South West England
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Re: 45m Antenna Portable Use
Does the antenna need to be fixed to the vehicle? If not, you could cut a dipole for something near the right length, use a matcher and literally bung the wires over some trees and hedges. It works! Not perfectly, but it surprised me.
Easily deployed, and easily removed when some farmer with a gun asks what you are doing!
---
Andy - FB107
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30/May/2021, 10:05 am
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MrFidget
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Re: 45m Antenna Portable Use
73’ odd foot of 1mm with a 36 - 49:1 match on a T240-43 and fold the end over to tune
Aluminium tube end fed is closer to 16:1-27:1 end fed, or run out a few radials along the ground and direct feed it if you can get 36’ in the air
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14/Jun/2021, 12:51 am
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Brokken Spectre
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Re: 45m Antenna Portable Use
Thanks for all the replies hope to hear some of you on 6670
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29/Oct/2022, 10:24 pm
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