Here's an explanation from Chuck Olson  -  WB9KZY of  Jackson Harbor Press about Mode A / Mode B. File attached.

 

I use Mode A and I use a genuine Curtis keyer chip - like MFJ has in some of their keyers.

 

Other manufacturers who manufactured Mode A did it incorrectly and you can complete a character and still make an error.

 

In correct Mode A once a character is sent and you let go, there's no extra dot or dash.  That's the way I want it.

 

I use Mode A and I recommend it because it causes fewer errors if your timing is off.

 

73

DR

--

David J. Ring, Jr., N1EA  

--  Historic Morse Recordings  -- YouTube channel with Morse recordings.

Life Member ARRL, VWOA  SOWP #3709-M  OOTC #4439 LICW #1212 FISTS #9227 SKCC #587 RadioClubofAmerica

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