Converter from 28-30 MHz to 144 to 146 MHz
The circuit shown converts signals in the 10m band in the range of 28 to 30 MHz in the range of 144 to 146 MHz, so in the 2m amateur radio band. With it, therefore, a 2m device can be used to receive the 10m amateur band. Such a converter was offered by the amateur radio equipment manufacturer Braun. It is characterized by the ring mixer, which guarantees very solid large-signal behaviors and so consequently very low intermodulations. The dual-gate MOSFET preamp provides good input sensitivity.
In combination with 2m business radio transceivers, modified for amateur radio, such converters have been successfully used as receivers for 10m repeaters. Due to their exposed locations, a good large-signal behavior is of paramount importance.