Category: Field Deployment

More Easy Antennas for the VHF/UHF

For the purposes of the next Radio Communications Seminar I constructed 2 antennas.

The first one is a ground plane field antenna using a folding handheld radio antenna.

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An SMA to chassis mount adapter is used and the radials are just solid core wire twisted through the adapter mount holes. The good thing about this method is that the antenna requires no tuning as the vertical element is already pretuned.

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The Ultrapack Battery Pack for QRP Low Power Radios

Survival Tech Nord has an open project running for making a small external battery bank for radios that operate at low output (5+ watt).

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The basic principle is using 18650 lithium-ion (Li-Co or Li-Mn) batteries that have big energy density and match their voltage to that of the radio.

Continue reading “The Ultrapack Battery Pack for QRP Low Power Radios”

One more DIY Groundplane Field Antenna version

Bret at the SurvivalComms Youtube channel (it is not me, just a name coincidence I did not expect) has built his own version of the Jungle Antenna (Link 1, Link 2)

He uses a ring made from ABS rods to “hang” and position the ground wires, and the handheld’s radio own antenna. From the looks of it performance can further be increased with a telescopic antenna like the Diamond RH-770.

He also has a build of a discone antenna with the same method.

DIY folding VHF / UHF Discone Antenna

Check him out!

 

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The Standardized Prepper Coded Matrix

In 2012 the Catastrophe Network published what they called The Standardized Prepper Coded Matrix (SPCM). The Catastrophe Network is no more, but luck has it that I kept the SPCM in my archive.

TCNScreen Capture of the Original Post.

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Easy DIY VHF Antennas with the BNC Male to Banana Jack Connector

In this short piece I will exploring the uses of the BNC Male to Banana Jack Connector in VHF antenna building.

It is a very controversial item cos it allows easy connection of the antenna elements, has a build-in coax connector, is stout enough for field work, and has also 2 mounting holes to pass your wire or paracord through. Practically you can build anything with it as long as you can cut and strip some wire.

Unfortunately I am too  occupied with lesser stuff to make and tune the actual antennas, so please make do with their simulations and a few comments.

The Vertical Dipole

Dipole

Continue reading “Easy DIY VHF Antennas with the BNC Male to Banana Jack Connector”