Category: DIY

HAMsmithing – October 2017

Here are two small projects for the beginning of this month.

12V to 10V Adapter Cable for Baofeng UV-5R Charging

A common mistake made is using a cigarette lighter power cord for powering the Baofeng UV-5R Charger. Problem is that the charger needs 10V and not the battery 12.8V, much less the 13.8V when a car battery is charged.

My solution was to make an adapter cable with a resistor inline to drop the voltage to a bit more than the 10V spec’ed.

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A Small, Pocketable Antenna Kit for Handheld Radios

I call it the Giveaway Antenna Kit. Because it has the capability to be adapted to any handheld radio, that is, the antenna connector style of any handheld radio. So you can have it in your larger radio kit, and give it away to anyone in need without bothering for compatibility with his radio.

The basic idea stems from this idea by Bret of Survival Comms Youtube Channel . The use of the handheld radio’s own (actually aftermarket improved) antenna on a groundplane kit. In my built, the groundplane (radials’) kit is much simpler and easier to use. You just attach the antenna kit wire to fit your HT.

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Construction

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Ενα μικρό Κιτ Εξωτερικής Αντένας για το Φορητό σας Ασύρματο

Οι φορητοί μας ασύρματοι υστερούν στην αποτελεσματικότητα τους για δύο λόγους. Έχουν μέτρια , έως κακή κεραία, και δεύτερον έχουν χαμηλή ισχύ.

Μπορούν όμως να βελτιωθούν προσθέτοντας μια καλύτερη κεραία (κάντε το οπωσδήποτε) και επίσης -αν μένουμε σταθεροί- μια κεραία βάσης.

Η ιδέα μου βασίζεται στην ιδέα του Bret από το Survival Comms. Στην ουσία μετατρέπει την βελτιωμένη κεραία του φορητού ασυρμάτου σε μια groundplane κεραία βάσης, κατασκευάζοντας ένα προσαρμογέα με radials.

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Η κατασκευή μου προχωρά παραπέρα δημιουργώντας ένα εύκολα κατασκευάσιμο κιτ radials.

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HAMsmithing – September 2017

Just as September was ending, I spent quite some time on small HAM projects.

1. I received the connectors and cables I ordered, so I sat down making cables for each DIY antenna I have.

2. I used some leftover PVC pipe to add 2 more sections in my collapsible antenna pole. Each section is 130cm (about 1.5 yards long), the wider my car trunk will allow. That makes for about 7 yards total height, just short of what one would need to make a sloping longwire antenna.

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HAMsmithing July 2017

This is a DIY USB charging cable for my Kenwood TH-F6A/F7E handheld radio.

web-IGP3869It is the same concept like the Baofeng USB to 10V charging cables that are found on eBay and amazon. But the virtue of the Kenwood HT is that it accepts a wide array of operating and charging voltage. Plugged to a 12V source it both charges and operates.

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Do NOT miss out on Bret’s SurvivalComms Youtube Channel

By a strike of luck the SurvivalComms name is used by me for this blog, and by another guy (Bret) for his YouTube channel.

It also happens that we both are focused on practical HAM radio matters for Survival and Prepping.

Bret is not only knowledgeable but also good at breaking down matters and applications  into simple, layman’s terms. Among these are his DIY simple antennas.

So DO subscribe to his channel.

Charging your Kenwood or Yaesu radio with USB power

If you are an owner of Kenwwod or Yaesu handheld radio, or anyone that accepts a charging input of 12V, then you might try this:

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The item regarding, is a USB to 10V adapter made for the Baofeng cradle charger. Its power plug is a 5.5×2.1 one. Then one can add an adapter cable for the plug his radio uses (the Kenwood one is 3.5×1.35mm). And have a way to charge from any USB port.

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