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G4AKC - HF Pedestrian and Bicycle Mobile
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New "HF Backpack Pedestrian" Mobile
Posted: 21 Sep 2021 07:59 AM PDT
https://www.g4akc.co.uk/new-hf-backpack-pedestrian-mobile/?utm_source=rss&utm_medium=rss&utm_campaign=new-hf-backpack-pedestrian-mobile
The new backpack consists of a Clansman metal frame carrying a modified
Alinco DX-70TH transceiver, this is powered by a lightweight 22Ah LIPO
battery which has its own dedicated charger.
The antenna is a modified MFJ-1979 17ft telescopic stainless steel antenna which is matched against a toroidal ground tuning unit (GTU).
The system does not require an ATU as the antenna is adjustable in length
to provide a good match between 14MHz and 30MHz, the ground tuning provides
the necessary ground coupling for the antenna to work against, there is
more information about GTU principles on
https://www.g4akc.co.uk/ground-tuning-units-gtus/
The set up provides up to 90 Watts RF into the antenna and the whole
backpack including antenna is only 17 pounds in weight.
This set up is an update to my original backpack from a few years ago shown here:
https://www.g4akc.co.uk/hf-backpack/
Dave G4AKC
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