How to Build a Simple PTT Interface for Digital Modes

By VK2BFC

Learn how to easily construct a PTT interface for your transceiver to enable computer control of the PTT line using the DTR signal from your computer's RS232 line. This tutorial by Albury Wodonga Amateur Radio Club provides a cost-effective solution that only takes about 30 minutes to make. The article includes a schematic and step-by-step instructions on building the interface, including fitting the resistor and LED. Perfect for hams looking to enhance their digital modes experience with software like FLDigi or MMSSTV.

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Technical Reference/Sound Card Radio Interfacing

The title of the main category is Sound Card Radio Interfacing and it deals mainly with Sound Card to radio interfaces. The link to this resource has been on our site since Wednesday Sep 10 2025, and it has been followed 25 times. So far no one has rated it yet. Be the first to rate it!
Last updated: 2025-09-10

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