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USB sound dongles that use 3.5MM TRRS connections ($8 USD) are easily found on Amazon. The isolation also adds a layer of physical protection from damaging your laptop. Isolating the digital mode audio from laptop system audio prevents inadvertently have operating system notification sounds being sent out to the radio.

Rather than buy an adapter that converts the 3.5MM TRRS male connector to line-in/line-out 3.5MM stereo male connections and connect to the sound card built-in to the laptop, I opted to include a layer of audio isolation and add a USB sound dongle that accepts a 3.5MM TRRS male connection. The Baofeng Audio cable has a K2 connector to the radio on the one end and a 3.5MM TRRS Male connector on the other end. Baofeng offers an audio interface cable ($19 USD) intended for digital mode use making it cheap and easy for RF to/from audio connectivity. The Baofeng UV-5R ($26 USD) is probably the most recognizable VHF/UHF handheld (HT) by hams and radio enthusiasts alike. The lab exercises will have participants communicating with other participants stations.

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Participants should have purchased all hardware in advance of the workshop. We will then install and familiarize ourselves with open source software packages used for encoding/decoding digital modes. We start with building participants build their VHF/UHF Amateur Radio stations.

see relationships between data rates and bandwidth.

learn each modes strengths and weaknesses.

develop familiarity with each mode starting with what each mode sounds like.

Experimenting with HF digital modes in a workshop setting on VHF/UHF provides ideal conditions for participants to: Truth be told, most Amateur Radio digital modes these days are developed for and used on HF to address resilience to band conditions. The station and a laptop running a currently supported operating system would be the only pre-requisites.

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I agreed to package a workshop that included using a simple low cost portable VHF/UHF digital mode station from readily available kit for under $75 USD. So we discussed revisiting a digital mode project I worked on a year ago and packaging it as a workshop that gives new Hams a taste of digital modes and inspires them to be active with it. When demoing Amateur Radio at past HOPE conferences, running digital modes has always had a big draw of interest but shy away from talking into a microphone.

While we see many getting their Technician class licenses and even upgrading, we are not seeing many put their new licenses to use. A friend of mine and I were chatting a few months ago about maker and hacker communities taking interest in Amateur Radio.