6.Simple 70cm-2m Receive Converter.
- Ronald Verweerdt
- Apr 30, 2025
- 1 min read
The 70cm amateur band. 430-440MHz, is a very interesting band and 1s becoming more popular perhaps because of the overcrowding sometimes encountered on 2m. 144-146MHz. Single side-band (s.s.b.) activity is in creasing. while for the f.m. operator there are a large number of repeaters. several times the number found on 2m and simplex activity is on the increase as well. With similar power. receive sensitivity and size of antennas, the results on 70cm can be comparable with those on 2m, and the
u.h.f. signals are particularly good at getting out of extremely screened locations (e.g. built-up areas tunnels, etc.).
In order to encourage still further interest in the 70cm band. the author attempted to design an inexpensive receive converter from 70cm down to 2m so that prospective operators could listen around before deciding to invest in a transceiver or transverter for the band. Design aims were for an easily reproduced and aligned converter with reasonable performance at modest cost. Other uses for such a converter include "listening through" local repeaters (listening to one's own signal coming from the repeater) and in conjunction with a tunable or synthesised
2m receiver. aligning and testing other 70cm equipment.
For more information on this project click on the following link ..Project is on page 20-23. If you would like to build this device we can get the pcb's made and source the components.
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