{"id":9070,"date":"2015-01-18T16:34:00","date_gmt":"2015-01-18T05:34:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2015\/01\/18\/digitizing-the-barebones-superhet\/"},"modified":"2025-07-22T01:55:10","modified_gmt":"2025-07-21T15:55:10","slug":"digitizing-the-barebones-superhet","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2015\/01\/18\/digitizing-the-barebones-superhet\/","title":{"rendered":"Digitizing the Barebones Superhet"},"content":{"rendered":"
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I did this for Pete. And I did it to start out the new year with something different. And because I needed the crystal for my beloved BITX and didn’t want to buy more crystals. <\/b>

<\/b> After successfully broadening the filter in my Barebones Barbados Superhet (originally built by Dale Parfiit W4OP) I decided to replace the VXO with an outboard Arduino\/DDS device. Nothing new in that (I was playing with this back in October), but in what I think is a symbolically significant twist, I pulled out the tuning cap for the VXO and, in the hole left by the tuning control, replaced the knob with a BNC connector. That connector now carries DDS signals into the receiver. The crystal was at around 23.125 MHz — that’s why the LCD display is showing 23 MHz. <\/b>

<\/b> It works great. I was listening to the DX station in Iran this morning. <\/b>

<\/b> Here is a video of the October 2014 experiments: <\/b>

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