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DZ Kit SR-74: A New Twist On An Old Favorite

JOE EISENBERG

The Heathkit GR-64 was one of the kit radios that gave many people their introduction to both amateur radio and shortwave listening. With its coverage ranging from the AM broadcast band up to 30 MHz, it was one of many radios popular in the 1960s and 70s. One has to wonder in this age of software defined radio (SDR) how the appearance and simplicity of the GR-64 can be reconciled with today’s SDR receivers and DSP-based receivers (Photo A). Brian Wood, WØDZ, of DZ Kit, has come up with just that. It takes the simplicity of the GR-64, built on SDR technology, and made it in kit form. The DZ Kit SR-74 “Saguaro” is based on the SDRplay RSP1A and the Raspberry Pi 4B (Photo B). Using the supplied DZ…

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CQ Amateur Radio (Digital) - 1 Issue, May 2023

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