6V pos grnd tach

50C8DAN
50C8DAN Senior Contributor
in HUDSON
This guy is modifying new tachs for 6V pos (or neg) ground.  

https://www.ebay.com/itm/194324584733?hash=item2d3ea5d91d:g:sLEAAOSwjY5g-yBs

Better than the vintage SW tachs that go for $500 and up.

Comments

  • superwasp
    superwasp Member
    Pretty cool. Too bad they look like a cheap auto parts store tach. 
  • 50C8DAN
    50C8DAN Senior Contributor
    Yep beggers can't be choosers as they say!
  • eddiehudson
    eddiehudson Senior Contributor, Member
    Unmodified ones are $62 on Amazon
  • superwasp
    superwasp Member
    Part of me suspects the guy simply found a tach that has internals that function on a voltage range from 5-16 V or something of the like. A lot of electronics will function on lower voltages than we feed them. I wouldn't be shocked if the "unmodified" one could be dropped in and function if you wire to the system in the right polarity. 

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