Tag Archives: Giuseppe Morlè (IZ0GZW)

Giuseppe’s “Delicate” Loop Antenna

Many thanks to SWLing Post contributor, Giuseppe Morlè (IZ0GZW), who writes:

Dear Thomas,

I am Giuseppe Morlè, IZ0GZW, from Formia, located in central Italy along the Tyrrhenian Sea. I hope everything is going well for you after the hurricane and that you and your loved ones are in good health.

I’m sending you this latest loop antenna of mine, which I’ve named “Delicate” due to its small size—about 20 cm in diameter—and because it fits perfectly with the Malahit receiver inside my car.

I am currently comparing it with a larger loop antenna inside the car to see how they differ. In fact, all of my antennas—whether for VHF/UHF or CB—are installed inside the passenger compartment of my car, and I can assure you, they work very well. Even my antennas for HF listening are mounted inside the vehicle.

I also have a loaded wire antenna hidden under the car, running from one wheel to the other. It works especially well on the 20-meter band, which is my favorite band for listening.

I wanted to share with you and all of the SWLing Post readers my experiences with listening and QRP experiments.

Thanks to you and all the friends at the SWLing Post.

Best regards,
Giuseppe Morlè, IZ0GZW

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DICA 2: “The Revenge” – Giuseppe tests his updated homebrew antenna!

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Many thanks to SWLing Post contributor, Giuseppe Morlè, who shares the following antenna project:

Dear Thomas and Friends of the SWLing Post,

I’m Giuseppe Morlè from Formia, central Italy on the Tyrrhenian Sea.

After the DICA prototype I created another one called DICA 2 The Revenge!

This other minimal antenna works differently from the prototype. It is shorter, has 3, 12 cm ferrites inside and has the sensors soldered inside in reverse on the telephone cable strap. It works coupled to a metal surface because it uses magnetic induction unlike the prototype.

In the videos you can see the differences between the prototype and the DICA 2…
and the yield on the highest ranges.

This small minimal antenna can tune listening from 3.5 to 30 MHz.

Thanks to you and greetings to all the Friends of SWLing Post.

73.

Videos

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Video: Giuseppe explains wiring/construction of DICA Homebrew Antenna

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Many thanks to SWLing Post contributor, Giuseppe Morlè, who writes:

Dear Thomas and SWLingPost Friends,

I’m Giuseppe Morlè iz0gzw,

Many friends have asked for the DICA wiring diagram after my recent post and demonstration.

I’m not a technician but a simple passionate listener and qrp’er… I made this video with a drawing that I hope will be useful to understand the details and how it works…

[Please note that this video is in Italian, but you can use YouTube Closed Captioning; it can even translate the subtitles into English or any other language.]

Thank you all.
Giuseppe iz0gzw.

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D.I.C.A.: Giuseppe’s latest homebrew portable antenna

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Many thanks to SWLing Post contributor, Giuseppe Morlè, who shares the following antenna project:

Dear Thomas and SWLing Post Friends ,

I’m Giuseppe Morlè, iz0gzw, from Central Italy, Formia on the Tyrrhenian Sea…
Some time ago I had drawn this minimal HF antenna on paper…

I took advantage of the New Year’s Eve rain to be able to build it with the usual leftover scraps…

The system consists of a 35 cm tube with two separate windings of telephone cable on it, 2.5 m on each side, green and white…in the center I connected the 4 ends to X…

The green lead with the white and the white with the green to the variable capacitor and the other two leads to the RG58 cable that goes to the receiver.

I started the test and noticed that the agreement was possible from 7 to 21 MHz…

I then placed a long ferrite inside the tube…

I noticed a strengthening of the signal and consequently of the noise picked up and the chord dropped to 3.2 MHz.

Tests inside my shack showed decent reception on all ranges…in the evening on the balcony on 80 m. I could perfectly listen to a QSO between Italian stations.

Everything is still in the experimental phase and I think I will try this minimal system also in QRP transmission.

In this first video I explain how this minimal antenna is made:

The second video concerns a 20 meter test by car. The antenna is placed on the dashboard of the car inside:

In the third video, I explain how it works without the ferrite and with the ferrite inside the tube:

In this video you can see the test on 40 m. outdoors on the roof of the house:

The tests are carried out at home in order to understand what can be achieved in an environment that is difficult to receive.

I will do more outdoor tests and I think this small minimal antenna will receive better. I will keep you informed.

Thank you all for your attention and I wish you all a new year full of satisfaction.

’73 de Giuseppe iz0gzw.

Fascinating, Giuseppe! I love all of these brilliant little antennas you design out of your “junk” drawer! We look forward to hearing more about this antenna and any modifications you make to it!

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Video: Giuseppe’s “Cassette Loop” on the shortwaves with induction

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Many thanks to SWLing Post contributor, Giuseppe Morlè (IZ0GZW), who writes:

Dear Thomas and Friends of the SWLing Post,

I’m Giuseppe Morlè from central Italy, Formia on the Tyrrhenian Sea…

My Cassette Loop experiment this time shows how induction takes place on short waves after medium waves.

I used a smaller box as the primary antenna which, however, is pushed by the secondary one due to the induction effect generated between the two windings brought closer together.

This way, the larger loop “captures” more of the signal and sends it to the smaller cassette…

I really like working on induction… I hope you like it:

Click here to view on YouTube.

Thanks and greetings from central Italy.
73. Giuseppe Morlè iz0gzw.

Thank you so much for sharing this, Giuseppe!

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Giuseppe experiments with mediumwave loop induction

Giuseppe upcycles and improves a homebrew MW antenna

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Many thanks to SWLing Post contributor, Giuseppe Morlè (IZ0GZW), who shares the following:

Dear Thomas and Friends of SWLing Post …

This is Giuseppe Morlè. As always, I try recycling what I have and improving upon antennas I’ve built in the past. This is one way we radio lovers can experiment. Many years ago, I made an antenna only for medium waves; by adding a circuit, I can now listen to short waves.

I took advantage of a small frame that I recovered from an old commercial FM / AM stereo receiver by removing its coils for medium waves and I wound around it only two coils sufficient to have a frequency range from 3.5 to 18 MHz.

I remember that the antenna in question also receives medium waves as it was born.

I chose this small frame because I wanted everything to be small in order to carry this compact antenna everywhere.

Unlike my other projects for SW and MW, which have a cable that carries the SW signal to the receiver, this time I used the induction that is created around one end of the loop, which I spiraled to get inside the stylus of my Tecsun PL-660 and which then transfers the signal to the receiver.

I did some tests on my balcony the day after a strong storm and I noticed that the propagation was absent but I still wanted to make sure that everything was working.

[Note that you can translate this video into your language via YouTube’s automatic subtitles. Click here to learn how to do this.]

I will keep you updated on other tests on more favorable days of propagation … I still invite you to follow me on my Youtube channel.

I wish everyone a good listening …
73. Giuseppe Morlè iz0gzw.

Many thanks, Giuseppe. I, for one, love all of your homebrewed and recycled antennas. This one is no exception! What a fun project. I love how you use what you have and aren’t afraid to experiment! Thank you for sharing.

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