Joe (W4TV) Yes I have performed the gain calibration many times on both receivers using the K3 Utility with the XG2. I recently did it after loading the new K3 Utility that supposedly fixed some issue about writing receiver gains to memory. So now you make two people whose RF gain tracks.
I can't begin to speculate anymore as to the difference in RF gain behavior in the two receivers. So to repeat: same antenna (to XG2), same stock filters with matched offset, same (0) filter gain, same ATT on, same PRE off, same IF filter width, same NB off, same NR off. Sub Rx gain set to minimum I can still copy signals and hear band noise, Main Rx RF gain set to minimum is dead band. This difference in RF-gain tracking makes it difficult to use reduction in RF gain as a method to manage high band noise conditions. I can't just grab both controls and move them the same, like I can with AF controls which track very well. Stan KR7R Main Rx RF gain behavior is bizarre. In the days of old potentiometers this would be explainable but not with gain controlled by firmware. Maybe a bad RF gain control with odd switch bounce behavior at some gain setting... I would try to move the RF gain knob while K3 is shut down to a new position and then turn it back on to see if the RF gain nonlinearity location changed to someplace other than 9 o'clock. AE6WA Mike Scott Tarzana, CA >>Joe W4TV said. Both of mine operate as expected (same RF/AF gain response for main and KRX3). Have you performed the RF Gain calibration on both of the receivers using a calibrated 50 uV signal source (e.g., XG-2)? ______________________________________________________________ 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
