The "sticky relay on the 5K still happens to me with new firmware, about every 100 transmissions or so (no pattern). It does happen more often when I am using VOX. I do not know if it happens more often on VOX because of the constant send/receive transitions that take place, or the fact that there is a higher chance of catching a transients. I have ruled out any transients to the amplifier switching (I noted one flexer had made a remark about that in the past that he only had problems when using the linear amplifier). I have a solid state switching device I designed, external to the Flex 5k that has absolutely no transients. I do have a theory though that it may be occurring when you are transitioning between T/R at the same time a high RF current is present on the coax. RF from an amp can be present on the outside of the coax that is connected to the transceiver. Although this does not affect my SDR-1000 or Kenwood transceivers, it does happen when I use the 5K. I was thinking of placing a torrid on the coax from the 5k to eliminate RF on the coax and see if that helps. P.S. I have everything in my shack grounded properly so no grounding lessons please!! Harry W9BR
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