BTW Elecraft K3 has the same architecture: Superhetodyne with IQ product detector to improve image suppression. 73, Vojtech
--- In [email protected], "Vojtech Bubnik" <[EMAIL PROTECTED]> wrote: > > For weak VHF signals wide band spectrogram is a useful feature. When > mirror suppression is more important than bandwidth, one could combine > classic IF filtered superhetodyne with IQ product detector. I believe > Eton E1 is built this way. > > I built a SoftRock RXTX 40 recently and I am disappointed with its > image suppression when using built in laptop sound card. My ATS-3b is > much better in this regard, being a classic superhetodyne with two > NE612 and 4 crystal ladder filter. Need to say the software that I am > using has very poor IQ calibration. > > 73, Vojtech OK1IAK, AB2ZA >
