20 Oct 2012

Another 472kHz transverter copy

LA5VNA's version of the G3XBM 472/500kHz transverter
Steinar LA5VNA has built a copy of my 472/500kHz 10W transverter and showed a copy of the design on the RSGB LF reflector today. Like G3ZJO, Steinar's is giving over 10W (more like 15W) output. To my knowledge there are now 3 copies of this design built and working. I recommend the addition of a second low pass filter to improve the harmonic content. The one from GW3UEP's QTX transmitter would be ideal (2 x 6n8 caps and a 15uH inductor).

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