Looking over Donner Lake

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Ham Radio, Summits On The Air (SOTA), Making and Hacking and Vintage Electronics are hobbies that I enjoy. This website covers my activities in these hobbies. See my personal website to learn about my IOT garden and photography. You may also visit my QRZ.com page for my Ham Radio profile.

Interested in learning more about Me?

Listen to the Hamdom Thoughts podcast by AD6DM interviewing me about Ham Radio, Making, Hacking and SOTA

Dan Koellen AI6XG

Dec 15, 2020
2 min

Mount Rose W7N/WC-001 Activation

Lake Tahoe and Tamarack Peak From Mount Rose Summit Trip Summary Distance: ~ 4.9 mi one way Transport: Hiking Elevation Gain: ~1800 fe...

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Dan Koellen AI6XG

Dec 13, 2020
2 min

Tamarack Peak W7N/WC-003 Activation

Lake Tahoe From Tamarack Peak Summit Trip Summary Distance: ~ 1.3 mi one way Transport: Hiking Elevation Gain: ~960 feet Time: ~ 0.75 ...

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Dan Koellen AI6XG

Dec 10, 2020
3 min

Mount Houghton W7N/WC-002 Activation

Operating Position on Mount Houghton, Mount Rose W7N/WC-001 in Background Summit Trip Summary Distance: ~ 4.8 mi one way Transport: Hiki...

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Dan Koellen AI6XG

Dec 3, 2020
2 min

Scott Peak W6/NS-153 Activation

Operating Position on Scott Peak Summit Trip Summary Distance: ~ 4.2 mi one way Transport: Hiking Elevation Gain: ~1700 feet Time: ~2 ...

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Dan Koellen AI6XG

Nov 29, 2020
5 min

Granite Chief W6/NS-115 Activation

Operating Position on Granite Chief Summit Trip Summary Distance: ~ 4.6 mi one way Transport: Hiking Elevation Gain: 2748 feet Time: ~3...

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Dan Koellen AI6XG

Nov 23, 2020
1 min

Wishing You a Very Random Christmas

Being the holiday season I decided to post this article from the December 2014 issue of Nuts & Volts magazine www.nutsvolts.com that I wr...

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Dan Koellen AI6XG

Oct 4, 2020
8 min

Trapped 20/30/40 Meter EFHW Antenna

An End Fed Half Wave (EFHW) antenna for operation on 20, 30 and 40 meters was built for SOTA operation. By using traps, the antenna work...

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Dan Koellen AI6XG

Jun 29, 2020
7 min

Big Font Clock Update: Dimmer-Interface PCB and Setup Instructions.

A prior post described the development and build of a clock to display time and date for UTC and Local. The clock characters are large, ...

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Dan Koellen AI6XG

Jun 6, 2020
4 min

End Fed Half Wave Antennas: More About the Primary Capacitor

I recently posted a blog claiming that a capacitor in the primary of the matching transformer is not needed for end fed half wave (EFHW) ...

1,434 views 1 comment

Dan Koellen AI6XG

May 27, 2020
3 min

End Fed Half Wave Antennas: Is a Primary Capacitor Really Needed?

In my research on End Fed Half Wave (EFHW) antennas I found that nearly all have a capacitor in the primary (rig) side of the transformer...

2,405 views 1 comment