This almost sounds partially like ALC Overshoot that is more of a problem with some radios than with others (it was really nasty on a TS590 that a friend had sent to me to test out). The pure 8-tone FSK signal does seem to make this more obvious on some of my radios than others. Some of my radios have a delay function that will curb this a bit. Not sure about the FTDX5000 or about how easily those functions would be accessed remotely but it may be worth a look.
Jim S. N2ADV > On Apr 12, 2019, at 12:38 PM, Frank Kirschner <[email protected]> > wrote: > > Some rigs, even high-end rigs including the FTdx5000, exhibit a spike on > initial transmit. I noticed it mostly with the amp. The power would surge > briefly, and then return to the dial value. > > I suspect the combination of the surge and a bit of RFI is causing the > problem. I suggest an opto-isolator on both ends of your CAT cable. They are > available for RS-232 and USB. That, plus some ferrites along the run should > help with the problem. Also, if you're using a desktop, try running several > ground straps to the case of the computer. Consumer-grade computers aren't > very resistant to RFI, and there is no bonding between the pieces of sheet > metal. > > 73, > Frank > KF6E > _______________________________________________ > wsjt-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/wsjt-devel _______________________________________________ wsjt-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/wsjt-devel
