Category: DX Commander

Easy way of working out how long your dipole should be – and how to fix any errors using a simple calculator. Enjoy. Callum.

My Single TIP before any Portable, Field Day or Holiday ops. Callum.

Part 3 of the simple "how to model an antenna" series. Today, we cover the basic square loop at 10m (about 30 feet) high.
Previously (In order)
Vertical: https://youtu.be/Dxedmw0dfjg
Dipole: https://youtu.be/iMBQiFAvcRo

We have FIVE current models and ONE in development. But which one suits you? Let me explain..
How I designed the DX Commander https://youtu.be/GEGuTDNqbqE
Tom Rowland’s Channel https://www.youtube.com/channel/UCW3uOTzOtgMMa8p6oKeXYXw
When we obliterated (Portable) 10m https://youtu.be/q33iEA6hD9Y
PRICES (as at June 22):
RAPIDE £179
CLASSIC £209
EXPEDITION £219
12.4 SIGNATURE £399
18 SIG (Nebula) £495

Callum.

Various terrain and Antennas: You can make the slope work to your advantage. I know your next question already. Hang on. I’ll make a video about valleys and mountains next! Callum.

(Apologies for slight buzz on audio – now fixed) This time I show you how to model a simple Flat-Top Dipole then we convert it to an Inverted V. This is Part 2 of the antenna modeling series. Part 1 here: https://youtu.be/Dxedmw0dfjg

If you have a tree or a spare pole, you can make this. Less than 7m height. But with a COIL for 40m but no 30m element.

Cut your elements this long:

10m 2.65m
12m 3.04m
15m 3.21m
17m 3.81m
20m 4.78
40m 10.03

For every band (not 40m) create a 6cm loop and secure with electrical tape (don’t add 6cm to the cut, just create it after cutting)

40m Region 1 (7.00 to 7.200 MHz) Wrap 14 turns of wire just below the white band on a DX Commander pole (that’s about 24cm up from the base) then continue to the top of the pole and come back down 60cm. This assumes your pole is 6.5m long.

40m Region 2 (say you need 7.200 to 7.300 MHz) then wrap 13 turns of wire just below the white band on the pole (again.. about 24cm up from the base) then continue to top and come back down 130cm. This assumes your pole is 6.5m long

Fine tuning can be made by cutting or adding wire to the fold-back element at the very top. Bear in mind that each turn of the coil is around 220 kHz change. So if your best SWR is at 7.22MHz, removing one turn will centre you at 7.00MHz.

500W for 2-minutes. Well we had to try it! This is the 40m coil option for the DX Commander Rapide. Callum.

This show answers your questions (and some questions you didn’t know you wanted to ask!). Callum.

Decibels (dB) can be slightly confusing. Here is a simple short video explaining. Callum.