Elecraft K2 as a 2m IF Transceiver for Microwave Transverters

This technical document details the modification of an Elecraft K2 QRP HF transceiver to function as a 2-meter IF radio for microwave transverters. The project replaces aging Yaesu FT-290R units, which provided 100 mW output and 6.8 V DC for T/R switching. The K2 modification incorporates a DEMI 144-28DC transverter board, configured for a 28 MHz IF. The K2 requires the K160M module for a separate receive-only antenna input and the KSB2 SSB module for SSB operation. The modified K2 provides a 1-watt output for the 2m IF, utilizing the QRP antenna jack for transmit and the K160M input for receive. The document outlines the physical integration and electrical interfacing, including PTT control for the transverter chain. This resource targets amateur radio operators engaged in custom hardware integration for microwave operations.