Re: FDM DUO INCREDIBLY NOISY!!! #fdm-duo
Don’t think I can help as traded in my ICOM 7300 to get an ELAD DUO-ART 120, because I found FDM-DUO’s Rx was much quieter than the 7300’s!toggle quoted messageShow quoted text
As before, running with no RF ground - my current antennae are five inverted Vees resonant on 40 (and 6), 20, 17, 15 and 10. FDM-DUO is powered from DUO-ART, with DUO-ART and laptop fed from same power socket (via large clip-on ferrite filter- clipped around several turns of mains lead). Clip-on ferrites on laptop's PSU. 7300 was powered via same filter.
USB leads for FDM-DUO are now as short as possible (50cm), with clip-on ferrites both ends.
Slightly off the thread, an unforeseen plus of the DUO-ART is that its internal ATU tunes my five inverted Vees (all fed unswitched from the same length of coax via a home-made 1:1 current balun) for 60 and 12 metres. The 7300’s ATU would not handle that level of mis-match.