A new paddle with no moving parts
VK3PF reviews a pressure-sensor CW paddle for the Elecraft KX2, replacing the stock KXPD2.
Description
This article reviews a custom-built, pressure-sensor-based CW paddle, designed by VK3IL, as an alternative to the stock Elecraft KXPD2 for the Elecraft KX2 transceiver. The author, VK3PF, describes recurring issues with the mechanical KXPD2, including intermittent operation and loosening screws, which prompted the search for a more reliable solution. The pressure-sensitive paddle utilizes a PCB and components provided by VK3IL, requiring surface-mount device (SMD) soldering for assembly.
The physical housing for the paddle is a DIY "sandwich" construction, employing two pieces of closed-cell foam around the PCB, secured with heat-shrink tubing. This design allows for comfortable, single-handed operation, particularly beneficial for portable activations like Summits On The Air (SOTA). The paddle connects to the KX2 via a 3.5 mm stereo plug, and its operation involves squeezing the foam-encased assembly to generate dits and dahs.
The successful implementation has led to the complete replacement of the original Elecraft paddle.