power supply for qrp rig

Discussion in 'QRP Corner' started by KD2RON, Apr 22, 2016.

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  1. KB9BVN

    KB9BVN Ham Member QRZ Page

    Yes...but they can generate hash noise....go with a SLA battery if possible....you can also buy a LM-317T voltage regulator and build up a circuit that protects your gear from over voltage. Or just use a simple 12v voltage regulator circuit....connect battery to regulator in, and regulator out to gear.
     
  2. W7CJD

    W7CJD Ham Member QRZ Page

    I have thought a 12 VDC battery manufactured for a motorcycle would be sufficient.

    No motorcycle shop near me.

    It's an idea.
     
  3. W0IS

    W0IS Ham Member QRZ Page

    When I priced them, motorcycle batteries seemed too expensive. Instead, I sometimes use a "lawn and garden" battery, which ran me about $20 at a local store called Fleet Farm. I believe I've seen them at Wal-Mart for slightly more.

    The purists will point out that it's designed for starting an engine, and is not a "deep cycle" battery. However, after I abuse one for a couple of years, I get another one for $20. One thing to keep in mind is that, like a car battery, they are not sealed, so they're not good for carrying around. For my QRP operation, I have a "fish finder" battery, which is a sealed lead acid battery. I've started abusing it, and I imagine it will be good for a couple of years. It also set me back about $20 at Fleet Farm.
     
  4. WD0BCT

    WD0BCT Premium Subscriber QRZ Page

    Many modern MC batteries are gel cell today. In addition you can get some small and lightweight packages if designed for smaller bikes. If you desire large Ah a battery sized for a Gold Wing or Big Cruiser will work.
    Try a Battery Specialty store. They carry MC batteries as well as Marine Deep discharge batteries. They also stock wall warts in many configurations. Let them know what your rig charging connection is and they can fix you up pronto.
     

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