ts-440 rx audio mods
here's some easy modifications to improve the rx audio fidelity of kenwood ts-440's. all references below are to the if board component designations.
increase c60 to a .47uf or 1 uf. this will increase low frequency response on all modes.
decrease c51 to .01 uf. this will increase high frequency response on ssb/cw.
try removing r263 (tacked on the bottom of the board on my early production unit). this will lower in amplitude the audio coming out of the detectors and improved the smoothness (a real technical term) of the audio, especially on am signals.
and, of course, i take no responsibilty for anything you do to your radio. be careful. the if board on the 440' is about the easiest one to get at.
73/dave
n2fam@ka3fmo.pa