Dead handy

My Wouxon KG-UV8D stopped working the other day.

Two thoughts crossed my mind simultaneously:

“Oh bugger, I suppose I’ll have to spend out on a new handheld now”.

“Yay!  I can go shopping for a new handheld now”.

Still, being the curious radio amateur that I am, I decided to see if it was fixable.

A quick investigation showed the battery had run out of charge, despite it sitting in the charger for the previous 24 hours.  Hmmm.  I checked the charger, and sure enough, there was no voltage on the terminals.

I was somewhat dismayed when I opened up the charger and could see nothing immediately obvious.  Also, it was nearly all SMD… all too small and fiddly for my liking – I like proper components that you can actually pick up with your fingers.

Also also, I couldn’t find a schematic for it.

But, I started tracing voltages through anyway and it wasn’t long before I found a component with volts and one side and nada on the other.  Either a diode or a blown resistor, maybe.   It had no values shown on it, just the letter H.  A bit of research on the internets and some conversations with some fellow hams suggested it was most likely a 1A fuse. Bridging it with a piece of wire proved that to be the most likely case as the charger started working properly.

I didn’t want to leave the fuse bridged out – fuses are there for a reason after all – but a replacement SMD fuse on ebay was about four quid.  Yes, four quid! For a fuse!

So, I used a 20mm cartridge fuse of the right value, slipped some heatshrink over it and wired that in instead.

Put it all back together and it works a treat. No need to buy a new one.

Whilst trying to find a schematic on the internet, I read of many instances where this charger has failed, so I thought I’d write it up here for anyone who might have a similar issue.

 

6 Comments

  1. Jules

    I have no idea what you’re talking about but when I first read that your Wouxon KG-UV8D stopped working, I thought it might be a trip to the docs.

    • Masher

      A case of “Physician heal thyself”, maybe?

  2. Rajesh Kumar

    Well done. You did not add your contribution to climate change by not buying another circuit.. We would all benefit if we had some skills to do what you were able to do.

    • Masher

      I dunno about that, but I did manage to save myself a few quid. 🙂

  3. Brennig

    That’ very smart of you. And also not so smart because you don’t get to go shopping for a new gizmo

    • Masher

      It IS smart, because I now have 180 quid to spend on something else 🙂

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