Category: Gear

HAMsmithing – Simplex Repeater στο Κουτί!

Μετά από αρκετές σκέψεις, μετρήσεις και μερικά λαθάκια, η ψήκτρα στον Ασύρματο του Simplex Repeater, ένα Baofeng UV-5R, έτοιμη.

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Ξεκίνησα με μια ψήκτρα 100x100x18mm. Και με αρκετό λιμάρισμα κατάφερα να πετύχω το τελικό σχήμα. π.χ. η λοξή τομή στο μπροστινό μέρος έγινε για να περνά η μπαταριοθήκη γύρω από την ψύκτρα και να κουμπώνει.

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HAMsmithing – Simplex Repeater in-a-box, DONE

Well after a lot of pondering and measurements and some small mistakes the heatsink for the handheld is done and installed, in my Simplex Repeater in-a-box

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I started with a 100x100x18mm heatsink. A lot of filing for the multifaceted final project was done. i.e. the oblong cut on the front is there for the AAA battery case to pass over and lock. Let alone the radio’s back was also complex with three levels of.

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A Suggested Method for Soldering Anderson Powerpoles

Here is my method of soldering the Anderson PowerPoles easy and cleanly.

Start with tinned cable ends.

Place the APP contacts on the work surface oriented the way they will be placed in their plastic housings (this is with the split on top).

Touch the CLEAN tip of your soldering iron on the contact’s barrel.

When sufficiently hot, start feeding solder in the contact’s hole. How much you will find by trial and error.

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Radio Gear Organization – The Small Kits Method

Some time ago I organized my radio gear in small kits.

Each one is completely self contained, including all relevant items.

i.e. The wire dipole kit contains both the antenna, its coax cable, possible coax adaptors, plus the necessary cord, zipties etc to mount the antenna. That method requires a lot of duplicate items (i.e. coax cables) and material, but it is easy to use without worrying about forgotten items. let alone there is lot of redundancy in the system, a fetish of mine.

Now it is time for labeling the contents in each bag plus coloring for fast access.

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My own take into Winter Field Day

By the end of each January it is Winter Field Day time. Where HAM operators run their radios under field conditions. Some are as bold as to do this on the wild, in a tent on the snow.

Inspired by the concept, I had my own version of two days ago. No, I do not do HF yet, and it wasn’t actually winter. Over here we have a spell of spring-like sunny days on the last third of January, and that day it was 14 degrees C at 3000ft.

So I took the road to the gazebo I frequent somewhere on our mountain. I had taken most of my VHF equipment with me and a new DIY antenna pole to test. Also scheduled were cutting two new wire dipole antennas, using the RTL-SDR receiver with my phonen and maybe testing my simplex repeater too. And add some bush crafting in the process.

I spend Friday and Saturday making the pole and organizing my gear.

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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.

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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.

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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.

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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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