Flowerpot Antennas

Have you heard of a flowerpot antenna? I hadn’t until recently, and I enjoy gardening also. But this antenna has nothing to do with gardening apart from why it was named flowerpot and it will probably end up either on your roof or garden.

A good friend of mine put me onto it as I was having trouble on 6m. A small group of us think 6m is under-utilised so we all get on their and chat for a while either on AM or SSB.

My antenna worked reasonably well, but they suggested I build my own using the flowerpot method. Given I’m always up for learning something new, I couldn’t resist.

The best but about the antenna is it is extremely cheap to make, easy to put together and the antenna works really well.

Flowerpot Antenna by VK2ZOI https://vk2zoi.com/articles/half-wave-flower-pot/ is a great site and has all the measurements.

You can make a flowerpot antenna for either 6m, 2m or 70cm. You can hang it in a tree if you wish, in a pvc pipe like I did, or using a pole or something else.

There were only two parts I needed, everything else I already had. But if I had bought everything, it would have cost me I total about $15. Not bad for a great antenna and one you can say you built yourself.

All I needed to buy was the pvc pole, which is optional and a slightly wider pipe to make the coil on I already had the RG58 coax, and it even had a pl259 plug on it!

My flowerpot antenna

Items I purchased included:
PVC Pipe. Make sure you give it a shake in the store before buying. If it is too flexible then it may bend and snap in the wind. But you don’t want it to heavy either.

Coupling Plumber Part to make my 50mm coil on:
https://www.bunnings.com.au/holman-50mm-pvc-dwv-straight-coupling_p4756318

If you want more information on how to make it and how I put it together, have a look at my video.

Hope you enjoyed the read. If you have any questions please let me know.


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Yaesu FT-225R

The 2m band has always been an interesting one for me. It used to be swamped with pager interference, but it actually is a great band. Inversion allows your signal to travel long distances at times, especially on SSB.

This video is about the Yaesu FT-225R 2m all band radio. While the radio is huge, it is a beautiful radio any collector would love to have.

If you want to look at the manual, you can look at it here. I love these old manuals, where they state every component in them as well as circuit diagrams.

According to all reports, I sounded excellent on receive and I loved the sound from it on revive at my end also. You can plug in an external speaker, but I was happy with what it had.

Special thanks to Michael VK3CMC who let me use the radio so I could access the 2m SSB net.

The FT-225R

The two metre band probably should be used more than it is, but it is a good fun band.

Hopefully we can make contact with each other on that band one day!


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Remote testing Antennas

I’ve always wanted to take the radio with me while on holidays and I always do. However I’ve always been limited to 2m and 70cm including local repeaters and digital work.

Our family enjoy holidays all over Australia into some of the most remote places without water, power or any mobile signal. Sometimes this can last week’s at a time.

If your keen to learn more about our travels around Australia and learn more, please let me know.

Most of these remote locations means limited activity on 2m or 70cm as there are no repeaters for days!

Because of this remoteness, there are several outback radio networks we can join or listen to. They make quite interesting listening.

However, when on holidays, we amateurs don’t want to just listen, we want to be part of the action! And HF is the next best thing.

I’m currently on holiday in the Victorian high country, also known as “The Man from Snowy River” country. It is rugged, beautiful and high. So up here I can actually can receive several 2m and 70cm repeaters, but this is a good test for HF work.

High up on Mount Buffalo

With me, I brought a battery pack, that has a 12 volt lithium battery which we run our camping fridge off.  I now run my HF gear off it!

I also brought my new QT-80 radio, which is small in size yet puts out 80 watts.  I have placed a video below on this radio if you are not familiar with it.

I used a magnet mount antenna base as the car I was using is not mine. This mount sticks to the car like glue, but also comes off on demand so you can adjust the antenna as required.

I brought two antennas to test.  The first one was the HF-008 antenna that covers more bands than the QT80.  I have a video on both these below for you if you are not familiar with it.

I also brought the new CBL-561 HF antenna so I could compare the two antennas. This antenna can be used while mobile unlike the HF-008 antenna. I have another video for you to show you that antenna below:

Before leaving home, I went to the hardware store and bought two lengths of pipe with caps that could safely store each antenna. I could then almost throw them in the boot of the car and not be worried about them being damaged or caught on something as I pulled them out of the boot.

Hot Tip

The funny thing was, while on holidays, I forgot to bring a measuring tape to adjust the antenna. Fortunately one of my children had a ruler with them so I was able to mark measurements down the side of the tube with a sharpie.

I also wrote down next to the measurements the lengths Radioddity recommended and then as I tuned in the antenna myself with the lowest SWR, I marked the pipe to my best measurements which were very close to the same as Radioddity.

This Tip I am sure will be very useful going forward when I’m out in the Australian outback or somewhere that I have no ruler!

Results

Both antennas fitted the same magnetic base which made this setup work well.

On testing both antennas using the same frequency to the same long distance contact, I and they couldn’t tell the difference between us. I found both antennas easy to tune in and get the SWA right down before making any contacts.

I then tried again from the top of Mount Buffalo, one of our highest mountains and got the same results where both myself and the contacts I spoke to didn’t know I had even changed the antenna.

There are differences between the antennas though which may help you decide which antenna is right for you.

Compare Antennas

HF-008

This antenna covers a lot of HF bands, as covered in the video above. However it cannot be used while mobile, mainly due to the jumper cable. It is a great antenna and can be used with a radio that puts out a lot more watts than the small QT-80 radio I used.

CBL-561

The CBL-561R antenna does not cover as many HF bands as the HF-008 does, but if you are using the bands it does cover, then this antenna might be good for you. One big advantage to this antenna is that it can be used while mobile, not just stationary.

Both antennas will need adjusting if you switch bands or switch from one end of the band to another. So setting the antenna to a permanent mount on the car on the top of the roof where it ends up out of reach, then you may want to rethink this. I found the magnet mount ideal, as you can still have it on the highest point of the car and access it easily.

Another option I also use is a bull bar mount that I use on my 4×4.

I’d encourage you to watch my video below as it explains what I discovered.

Remember the old saying Hight is Might and going portable gives you an opportunity to test this theory.


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