It may be that the problem is around/related to the RF gain pot. Check the traces/pins/sockets related to that. "RF gain" is a voltage across a pot, whose wipe, with a percentage of the high side voltage, is sent to an ADC to generate numerical advice to the MCU for RF gain. Anything that shorts or places an existing voltage on the wipe line other than that from the pot wipe could move the voltage indicating erroneously that you had set the RF gain back, and would raise the S meter reading. Even though this is a digital process, the analog behavior was retained of setting the S meter to where the signal would have to be to have signal engage AGC again.
When the defect is in force, does the radio behave as if you had cranked back the RF gain to the point of showing that same S meter reading or does it still receive as if the RF gain were at maximum? 73, Guy. On Sun, Aug 1, 2010 at 2:21 PM, Duncan Carter <[email protected]> wrote: > I did that but it didn't help. > > Dunc, W5DC > > Don Wilhelm wrote: >> Was the nut on the headphone jack tightened sufficiently to make the >> washer behind the panel tight? If not, there is a possibility that >> the board is moving a bit when the headphones are plugged in (or >> removed) and may cause "strange happenings". >> Squeeze the board and front panel metal together and snug up the >> headphone jack nut to strong finger tightness. >> >> 73, >> Don W3FPR > . > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
