Re: (ET) difference in foot pedal speed controls between E20EC and E20DA

[Larry Chace <RLC1 etnainstruments com>]

Hi, Guys.  Remembering that the E10 A-D versions have 8 forward 
speeds while  the E-F versions have but 7, I'd be VERY careful about 
comparing the wiring connections.  The A-D machines have contators 
1A, 2A, and 3A, whereas the E-F machines have no 3A contactor.

Looking just now at a handy E-15 speed control, I see that some of 
the original micro switches have all 3 terminals, some of which are 
sometimes not used, while other micro switches have had the unused 
terminal chopped off (at the micro switch factory).  The only reason 
to chop off the unneeded terminals is to help avoid wiring errors, it 
seems.

Larry Chace, Ithaca, NY  I-5 and E15