Category: Power

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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HAMsmithing – Off-grid Charging for the Baofeng UV-5R and UV-3R Radios.

 

Chinese radio users know well, that grid power is needed to charge their radios. The reason is that their charging is tied on the 110/220V power and the radios’ own cradle charger.

To eliminate the charger it is impossible, but to replace the power to the charger is possible.

The Baofeng UV-5R and siblings’ charger demands 10V and there are various ways to replicate that.

  1. Use a 12Vto 10V car socket cable.
  2. Use a 5V to 10V USB cable.
  3. Use a battery system that outputs 10V

The latter is one such build.

Continue reading “HAMsmithing – Off-grid Charging for the Baofeng UV-5R and UV-3R Radios.”

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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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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The Ultrapack Battery Pack for QRP Low Power Radios

Survival Tech Nord has an open project running for making a small external battery bank for radios that operate at low output (5+ watt).

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The basic principle is using 18650 lithium-ion (Li-Co or Li-Mn) batteries that have big energy density and match their voltage to that of the radio.

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My Tupperware Baofeng Radio Kit

First I am cheap. Then I am unemployed. And lastly it is foolish to travel to the next big city to find a padded pelican case and pay for it as much as the kit costs, AND as much for gas money. So an old Tupperware brand food container was used. See, I do try for quality when I can!

So I started with placing a carton sheet on the bottom of the box, and continued by laying the items, and marking the dividers position. Then I removed the carton, made the dividers and glued them on. Then I proceeded with gluing thin packing foam sheet.

With a bit thicker packing foam I covered the bottom of the compartments and I also cut a covering sheet by the same material.

And I ended up with the following. Not pretty, but functional, and easy enough for your kid to do.

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Notable Notes 3: A Look at AC Inverters for Off-Grid Power

Starting with a Note… I started this Notes series as a way to redirect readers to worthwhile articles and info sources. Sort of what you do when you share a post in Facebook. I strive for original content, so this method allows me to avoid informing readers of the good stuff out there without having to synthesize a new article of my own.

 

On the subject matter now, recently I stumbled on 2 articles on Inverters and the way to apply them for off-grid (read that as emergency also) power. They are on the Off-Grid HAM blog. Check them out!

AC Inverters For Off Grid Power, Part 1

AC Inverters For Off Grid Power, Part 2