David Cappello (KG5EIU)

Adventures And Interests



Building A 50Ah LiFePO4 Battery Box

Build notes on a light-weight portable 12v 50Ah LiFePO4 battery in a pelican laptop case for HAM radio and other uses – great for POTA and SOTA trips. Features include an AMP meter/gauge, main battery disconnect, dual Anderson Power Pole ports, PD/USB-C and USB QC 3.0 charge ports all housed in a lightweight easy to carry laptop case.

Continue reading “Building A 50Ah LiFePO4 Battery Box”

POTA Activating Park K-4423

KG5EIU Activating Spring Creek Forest State Preserve

Parks On The Air (POTA) activation. I visited Texas State Park K-4423 which is “The Spring Creek Forest State Preserve” park located in Garland Texas on December 27, 2021. It was a beautiful NTX day and very warm for late December with temperatures in the mid 70’s F and a slight breeze.

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Building A HAM Radio GoBox

Operating HAM Radio GoBox From Local Park

Short slide deck and some notes on building a dual radio HAM radio gobox for Emcom use, Parks On the Air (POTA), ARRL Field Day and other HAM Radio events. Presented at the Dallas Amateur Radio Club Oct 2021 member meeting.

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Picture Mode IC-9700

Short YouTube video showing you how to get into picture mode on the Icom IC-9700 HAM Radio using the new firmware v1.20 release early Oct 2019.

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ZUMSpot ver .6 Unboxing

ZUMSpot ver .6
ZUMSpot ver .6 with 1.3 OLED HotSpot

More unboxing photos and notes in my flickr gallery.

Continue reading “ZUMSpot ver .6 Unboxing”

Volunteering Support: 2016 BMW Dallas Marathon

I got to volunteer as a shadow to the Relay Coordinator supporting the 2016 BMW Dallas Marathon.  I needed a higher power radio setup that I could temporally install in a late model Tahoe complete with APRS support.  I setup a Yaesu 400DR, and ran APRS on VFO-B.  Mounting the raido on a 11X17 cutting board allowed me to temporally hang the entire setup off the back of the driver or passenger seat with a 5/8 wave mag-mounted antenna for “portable mobile” use.   This setup was very easy to setup in under 2min time and if needed would have been able to move to another vehicle or operate from fixed location for an extended period of time using the 12 volt 10Ahr battery.   The control head had a RAM-Mount ball and could be either mounted to the cutting board or on a window RAM-Ball mount for easy viewing.   I extended the mic connection with a 15” length of flat-satin cable with 6 pin RJ-12 connectors straight thru.  The setup worked really well and I ran it for over 7hours.  Looking forward to next year. Continue reading “Volunteering Support: 2016 BMW Dallas Marathon”

Last February 2016 I was awarded the  Worked All States award from QRZ.  


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