The first modern radio I owned was a '520S. Finally have one in the shack after 40 years!
Have technology from space aliens & NSA - yet I still can't filter the guy up the band!
A look at filtering and drift on a classic
Adopting the YG-455C-1 for use in the Kenwood TS-830S 2nd IF
My 1977 dream rig - now joining the shack lineup. Details on the rig and mods, of course, here.
Tame the drift from the RFSPACE IF-2000 with this simple OCXO conversion
A cure for the bandscope blues here
VNA plots of roofing filters found in the main RX of the FT-9000, and the sub RX of the FT-5000. What does this mean for the FT-2000? Now with DR3 measurements!
Quiet down the weak signal hiss from the second RX with this easy mod ...
Yaesu has made some changes to the front end protection circuits. See the details here.
FT-2000 DSP Filter Characteristics
Plots of the DSP filter. As well as an investigation into the magic behind APF. And how about CONTOUR? It's all here!