Cheap 1/4 wave antenna whip from AliExpress

This small antenna is getting more and more interest here on the reflector and Facebook.

I was dubious at first but bought one recently as the price dropped even further on AliExpress. I brought it on top of OK/OL-022.

It worked well. This was my setup:

  • Fully extended whip (obviously)
  • 4 radials (the flat cable can be split) on the ground
  • KX2 @ 10W + internal ATU

It was a late activation but easily made contacts on 30m, 20m and 10m, with 2 DX on 10m.

My takeaways:

Advantages
Cheap
Quick to setup
Lighter than a fishing pole + dipole/EFHW.
Small overall footprint (10m radius circle) if using supplied radials
Vertical, better for DX
Rated 300W
Spare parts available

Downsides
Need fumbling to tune manually if not using a tuner
Whip is probably quite fragile
Need soft-ish soil
Heavy PL-259 connector
Poor performer on anything below 20m

For those who own this antenna, what are your impressions, your recommendations (e.g radial configuration)?

A few pictures from the activation below.

PS: yes, I know home brew is cheaper and more satisfying :slight_smile:






6 Likes

I’m very pleased with mine.

I use it with 10 x 2.5m radials. I have better swr on all bands compared to fewer 5m radials. Also smaller footprint.

I add a choke on the feed point.


I’m considering making/buying a coil for 40 and 30m. Not sure yet how worse it would be to put that coil straight on the feed point instead of a few decimeters above with one “extension” shaft.

I though about a variable one like this:

I need to study a bit more.

On my blog:

3 Likes

What is the thread on the antenna connector?

Google says M10.

I can say it’s the same top and bottom. Which reminds I should mark which is which! There are not distinguishable without unscrewing the connector :dizzy_face:

2 Likes

Yes it’s M10. I carved an arrow on the red plastic to differentiate antenna and radials screw.

Just use the multimeter in continuity mode to check which one is which.

2 Likes

I’m using eight 3.5m radials, so I can use it on 30m with a loading coil. I used silicone insulated #24 wire and like it.

It’s been a long time since I’ve modelled antennas, so it may be somewhat error-ridden, but I have linked to a NEC2 file.
va3rr
Aliexpress monopole

3 Likes

M10, however I purchased a knurled aluminium M10 to 3/8 UNF 24 TPI adapter.

Andrew VK1AD

3 Likes

I use it with the PAC12 coil and you can easily find the tuning at 40m with the entire whip extended by looking for the point of greatest noise/reception on the coil. You can use almost the entire whip in 10m with the help of the coil in the same way looking for more noise like a 1/2 wave. It is a great portable antenna, effective, small, simple and quick to assemble

You can see here: