Re: [wsjt-devel] Does the FT8 signal spike at the beginning of each transmission?

[Frank K. <fra...@gm...>]

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