Re: [Elecraft] K1 with a strange XFIL problem...

Success! Thanks to Bruce N1RX for his knowledge and prior troubleshooting to resolve this issue. What he described and photographed (above) are exactly the cause of this problem. The RIT switch leg was making contact

Re: [Elecraft] K1 with a strange XFIL problem...

Hi all - I wonder if this problem has ever been resolved? I have had the same issue for several years with mine (serial number 278, previously owned by K8RA who reported the same problem.) http://elecraft.365791.n2.nabble.com/On-a-K1-how-do-I-get-back-from-FL3-to-FL1-or-FL2-Menu-freezes-td757

Re: [Elecraft] K1 with a strange XFIL problem...

Bruce, There is nothing overtly associated with the selection of FL3 that *should* cause a lockup. The way the bandwidth is controlled is to vary the voltage of the XFIL/TONE signal from the D/A converter - front panel U2 and apply it to the varactors connected to the filter crystals. I suspe

[Elecraft] K1 with a strange XFIL problem...

OK, folks. Time to put on your thinking caps... I just purchased a used K1. Has NB, ATU and 4 band board, set for 7/10.1/14/21 MHz. All appears to be operating normally, except... When cycling through the crystal filter bandwidths from FL1-FL3, once FL3 is reached, all buttons become unresponsive.