Hello everyone, Lately I obtained two AF filters. One is marked as: FILTER BAND PASS 5915-99-920-1117 500 C/S TX & RX The other one: FILTER BAND PASS 5915-99-920-1118 700 C/S TX & RX Dimensions about
Hi All at LF, Is it useful to use a audio filter like the DATONG FL3 MULTI-MODE AUDIO FILTER WITH NOTCH FILTER to help with QRSS receive on LF, does anyone use one or similar? I don't have one but se
Hi Gary, IMHO, there no great benefit from using an audio filter for QRSS. I tried the "DSP" in an FT897, and also a narrow analog filter (which I use for CW on LF), but couldn't see an improvement o
Hi Gary, There are a couple of these floating around here that spend their time rescuing boat-anchors and such. They really were the best pre-DSP post-receiver filter boxes. The auto-notch works a tr
Dear Gary, LF group, The FFT process of the spectrogram does a very good filtering job, and the sound card audio input has a surprisingly good dynamic range, being able to cope with unwanted signals
Hi all, I'm parallel to Jim M0BMU for regarding that QRSS reception via a sound card does not benefit from very narrow analogue filtering in the radio, or at audio prior to application to a sound car
