Dont know for sure on the 1600, but for future reference the calibration password on the IFR-1900CSA is "CSMATE" which will have to be input from the keypad with the shift engaged. Apparently it is written in the service manual, which I don't have. With that said you should probably stay out of there without a service manual and another test set of known calibration.
I'd suspect the caps getting weak in a negative voltage generator, look for a ICL-7660 or MAX1044. Or I'd try replacing the audio amplifier. On Thu, May 20, 2010 at 11:25 PM, burkleoj <[email protected]> wrote: > My IFR 1600S is giving me a couple problems. > > One is it appears to have some high frequency noise in the received audio, > but the generated signal and audio looks and sounds clean. I am thinking > maybe some caps in the power supply might be causing this problem. > > I have the three inch thick operators manual, but does anyone have a service > manual for one of these beasts. > > I tried to run the calibration from the aux menu but I can not seem to find a > password that the operators manual makes reference of. > > Any help or ideas would be most appreciated. > > Thanks, > Joe - WA7JAW > > I tried > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > >
