The Heros Tech 144-146MHz to 28-30MHz VHF Down Converter introduced here expands the frequency range of any Software Define Radio (SDR) or analogue shortwave receivers covering 28MHz to 30MHz (10m band) allowing reception of the exciting 144MHz-146MHz band (2m band).
The Converter is connected between the antenna and a SDR or analogue HF radio (called IF receiver).
When turned ON the 144MHz-146MHz band is mirrored on 28MHz-30MHz band. For example, if the IF receiver is tuned on 28.430 MHz, you are receiving the frequency of 144.430 MHz, (allocated segment of frequencies for beacons according to the 2m band plan in some countries.) Tuning to 29MHz you are receiving 145MHz and so on. Some SDR software, as PowerSDR, provides the capability of configure the LO off-set frequency in order to update the dial readings. (see below "Connection to FlexRadios diagram)
The Converter allows the reception of all amateur radio services assigned to the 2m band such as SSB, CW, FM, RTTY, FAX transmission modes, internet voice gateway, digital communications, repeaters space communications, (ISS International Space Station, space-Earth link), amateur satellites and many more stimulating activities.
The Heros Tech 144-146MHz to 28-30MHz VHF Down Converter is designed taken in account the wide range of signal variability that are expected to be received. Those conditions demand for very low noise, good front end filtering, high dynamic range performance, excellent IMD characteristics and good IF receiver isolation.