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I noticed some CW transmissions with very long "dah" relative to fast "dits".
A very distinctive sound.

I would even say "sloppy dahs", as a "dah" at the end of a world can often be even longer.

Could this be a "bug" (Vibroplex) signature sound ?

W6KME

@F4JWJ My FT-920 has a menu setting to choose 3:1 or 5:1 dah/dit ratio in the keyer, so apparently it's a thing of some kind. I know one person locally who uses 5:1 and it's very hard for me to copy anything.