Antennas

7m Rapide gets User Guide

The User Guide ir written and is located here:

Watch the video in conjunction with the user-guide.

Based on a 7m telescopic pole (circa 6.8m) and will work from 40m through to 2m band. Incredible.

Cut Chart as follows. Cut your elements this long (in metres – not feet : )

  • 30m 7.99 (includes 2 x 6cm loops and a 1.29m return off the top)
  • 20m 4.95 (all these have a 6cm loop incorporated into this cut chart)
  • 17m 3.85
  • 15m 3.29
  • 12m 2.81
  • 10m 2.50

To clarify: Taking the 10m band for instance, cut your element at 2.50m exactly and fold-back a loop of 6cm which makes the new total length of 2.44m.

Want feet and inches? Just Google “convert 2.81m to feet and inches” (for instance).

Modelling a 2-element Delta Loop for 40m

MMANA 2 Element Delta Loop modelling: I mentioned this on Saturday’s LiveStream. You can download it and have a play, rotate it, delete the reflector etc:

DOWNLOAD HERE >> 40m 2-ele delta loop <<

Remember, DON’T email me, but comment on the channel. Thanks!

Quarter Wave -vs- 5/8ths Wave Vertical

q-wave-vs-5-8th-wave

Compare Red 5/8th -vs- Blue W/wave

Anyone who has mucked about with verticals will no doubt have worked out that a full-sized quarter-wave for the 40m band, more or less tunes up for 15m band.

It wasn’t until my entry in IOTA Contest this year that I convinced myself that they are not a cloudburner (as many people suggest) but compare favorably with a quarter-wave, even producing more gain by 2 dB at 10 degrees above the horizon.

OK, so 2 dB isn’t a huge gain, but hey – it’s free. Take it when you can!

Don’t forget, you can do the same for 10m band too by making an element 6.83m long and folding it back a further 1.11m (for 28.5 MHz). So you’ll need nearly 8m of wire. Don’t forget, that’s insulated wire!