Christmas Past: A 'Sudden' holiday surprise

The December 2008 WorldRadio QRP column by KI6SN focuses on G3RJV "Sudden" direct conversion receiver, passed out to many NorCal members in 2006 as a Christmas gift by renowned QRPer Doug Hendricks, KI6DS.

Although it never has been offered as a kit by Hendricks QRP, you'll see that the "Sudden's" parts are relatively easy to find and the circuit is well within the capability of most builders.

For an enlarged view of any of the photographs or illustrations, click on the image.

Here's the first page of documentation that arrived with the bag of parts at Christmastime 2006:

Here's the second page, showing the Manhattan construction layout:

The RED portion of the below illustration shows where a 39pF disc ceramic capacitor was added in the KI6SN version to bring the '"Sudden's" coverage into the 40-meter CW band:

Here's a shot of Manhattan PC board pads and scored IC pads glued to the "Sudden" PC board groundplane prior to mounting parts in the KI6SN version:

Although the "Sudden" is not part of the Hendricks QRP line, click here to see the KI6DS kits currently being offered.