Month: January 2018

Το δικό μου Winter Field Day

A note for the foreign readers. The same article will appear in English very soon.

Κάθε χρόνο προς τα τέλη του Ιανουαρίου διεξάγετε ένα διεθνές ραδιοερασιτεχνικό event, όπου οι ραδιοερασιτέχνες μεταφέρουν τον εξοπλισμό τους έξω, στο ύπαιθρο, και τους λειτουργούν με ότι μέσα μπορούν να κουβαλήσουν. Το event έχει και διαγωνιστική χροιά, αλλά ο καθένας μπορεί να μετέχει όπως μπορεί.

Δυστυχώς δεν κατάφερα να συμμετέχω αυτό το ΣΚ, αλλά χθες πήρα τον εξοπλισμό μου και κατευθύνθηκα προς το συνηθισμένο κιόσκι κάπου στο βουνό μας.

Σκοπός μου ήταν να δοκιμάσω ένα νέο ιστό κεραίας, να κατασκευάσω 2 νέα δίπολα και να τσεκάρω την λειτουργία ενός ακόμη, μακριά από τον ηλεκτρονικό θόρυβο της πόλης, αλλά και να περάσω καλά.

Όλα ξεκίνησαν με την προετοιμασία του εξοπλισμού μου. Για πρώτη φορά θα έπρεπε να πάρω μαζί μου σχεδόν το σύνολο του και θα έπρεπε να τον οργανώσω κατάλληλα.

Continue reading “Το δικό μου Winter Field Day”

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HAMsmithing – DIY Receive-only Antennas for RTL-SDR Dongles

So, after putting my cell phone in to use and running RTL-SDR radio listening apps, it was time to make 2 antennas for the dongle, the original one being Poor.

So I got me a coffee, nerves of steel, and started soldering on two MCX window Connectors for RG-174 cables.

The wire was sourced from a surveillance camera installation cable. It has 3 single conductors and a coax wire that seems to be RG-59 75ohm one.

Continue reading “HAMsmithing – DIY Receive-only Antennas for RTL-SDR Dongles”

Digital Weekend – Turning your Cell Phone into a Scanner with RTL-SDR

Hello! I am starting new series describing my ventures to the digital radio world. I will be using the weekend down time to do, try, photograph and write short articles on the matter.

But do not expect many of them. I do not own HF equipment yet, and my patience with installing PC programs that do not work has worn out. So, I am new to Smartphones so I am still like to play with them. And we better have something to do with them when the lights turn off, don’t we?

If you haven’t heard of RTL-SDR receivers for your PC, the basics are these. One gets an dirt cheap RTL TV dongle and uses it with a freeware program like SDRTouch to scan the VHF & UHF spectrum. Practically some people repurposes them by writing their own programs for scanning.

The output is then displayed on the screen with the mesmerizing view of a rolling waveform graph.

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PC running SDRSharp Screen Grab

Then things get more complex as they develop the programs to scan by their own, plugins to record, filters to de-noise, and plug-ins to decode digital modes.

Continue reading “Digital Weekend – Turning your Cell Phone into a Scanner with RTL-SDR”

HAMsmithing – DIY Baofeng Programming Cables

I will guess that more than half the people that tried to program one of the Baofeng failed victim to the fake programming cable chip plague.

It happened to me also, and the process of finding a working driver, to no avail, killed my will to move further.

Enter the Baofeng T-1 mini radio and its programming cable that really worked!

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Since it terminates to a mini-USB connector I quickly formulated the plan to hacking it for my UV-5R and UV-3R radios.

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Continue reading “HAMsmithing – DIY Baofeng Programming Cables”