I have problem with my 70cm rig, an Icom IC-448. I have used
it for packet radio about ten years (running 24/7) and
suddenly the squelch have stopped working. I have no schematics
but know, from the manual, in what area the squelch circuitry
is and have looked at the voltages there. But I am not that
much wiser from doing so. Pressing the monitor button will
open the squelch after an initial period, acting as if a capacitor
is charging up. But normal squelch does not work at all.

Anyone who have had this problem and found the cure for it?
Anyone who have a schematic?

73 de Lars, sm6rpz

--
Lars E. Pettersson | Chalmers University of Technology
| Gothenburg, SWEDEN