Jared Crapo

Hey, I'm Jared and I'm an amateur radio operator, callsign K0TFU. My local club is the Draper Ham Radio Association. Read more about me.

First Radio

Looking for your first radio and don't want to learn everything about handheld ham radios in order to get on the air?

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Economical less than $100
Mid-range $100 to $300
Expensive more than $300

Complete Guide

Specifications, feature comparisons, reviews, and buying advice for handheld ham radios and antennas.

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Repeater Systems

Amateur radio repeaters can be linked together into a repeater system. When you send a transmission to any repeater in the system, your transmission is relayed to all of the other repeaters in the system. I've gathered data for 14 repeater systems in the Mountain West. Each one has a map, frequency listings, a printable list, and a file you can download and import into CHIRP.

APRS Service Registry

APRS services, sometimes called bots, provide useful capabilities to operators via APRS messages.

I've been keeping my own personal list of useful bots and what their commands are. I'm throwing away my list.

Craig KM6LYW introduced me to the APRS Service Registry. The registry is much larger than my list, and has the benefit of being a resource for the entire community.

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Proposing APRS On The Air

I have a proposal for a new APRS activity and supporting software called APRS On The Air. It brings the activator-and-chaser game of Parks on the Air and Summits on the Air to APRS.

Read the proposal at https://aprsota.org. I'm looking for feedback before I build the software.

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LinHT Rev B

Handheld screen running on LinHT Rev B

The mad lads working on LinHT have posted a major update on their accomplishments with Rev B. These boards added:

  • power management
  • USB-C battery charging
  • an RF power amplifier
  • RF attenuators in the receive path
  • a GNSS module

With Rev B boards they have succesfully transmitted M17 over RF.

They are on to Rev C with work on GNSS antenna improvements, audio codec changes, and more.

This is amazing work from a core team of only 3 people:

  • Wojciech SP5WWP
  • Andreas OE3ANC
  • Vlastimil OK5VAS

See also my earlier post on Rev A progress.

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