Hello Bruce, Just to rule out any electrical or mechanical discontinuities in the RF gain control itself, you can use the CONFIG > SW TEST > SCN ADC option to examine the ADC reading as a function of rotation position for both RF gain pots and both AF gain pots. In order to be able to see the "SW TEST" option, you will first have enable "TECH MODE" by setting "CONFIG > TECH MD to 'ON'
Once you've selected SW TEST > SCN ADC, slowly rotate your rf gain control from one extreme to the other while watching the 'steps' in the VFO B display, looking for any sudden step changes. The values I observe run contiguously from 002 at full CCW to 239 or 240 at full CW. Good luck with your troubleshooting. 73, Dale - WA8SRA On Wed, Dec 13, 2017 at 4:25 PM, Bruce Meier <beme...@bellsouth.net> wrote: > Looking for suggestions here from someone that might have experienced this > same issue - - > > > > I have (2) K3 units (not the S model) that are acting different when the RF > gain adjustments are turned fully counter clockwise. > > Ø Unit one – s/n 1062: When the RF gain is decreased to full counter > clockwise position the S-Meter registers full scale (60db over S9) as > expected. > > Ø Unit two – s/n 1193: When the RF gain is decreased to full counter > clockwise position the S-Meter registers only S8. > > Facts: > > Ø With the exception of the S-Meter readings with RF gain settings, both > units are working fine > > Ø Both units have ‘almost’ all mods installed. If not all, they are at > least both the same. > > Ø Both units are running the same version of microcode (5.54) (2.88) > (2.88) > (1.26) > > Ø Both units seem to register very close actual RF gain of stations when > connected when tested on the same antenna > > Ø Both units have the new synthesizers. > > Ø Both units have second RX > > Ø In both cases (both units) I can hear the audio level decreasing > linearly > as expected as the RF gain is turned counter clockwise > > I have tried to initialize the K3 and reload the firmware resulting in no > change to the RF gain / S-Meter readings. > > > > Elecraft Tech Support suggested: > > Ø Calibrating the s-meter – did nothing > > Ø Next suggestion – send the rig to California. > > > > Anyone have this issue and fixed it?? > > > > 73, > > Bruce N1LN > > > > ______________________________________________________________ > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
