<VV> tach-speedo-odo repair

[Tony Underwood]

At 01:42 PM 3/30/2011, J R Read wrote:
>This from lclc:
>
>
> >I use instrument services in roscoe il.
> > http://clocksandgauges.com/
> > typical speedo rebuild & calibration around $200.
> > lc


Now:


I'm not an authority on marketing services or the like... BUT.


200 bucks to repair a factory Corvair tach is kinda steep.   I've 
fixed a number of them and not a one ever cost more than about 12 
bucks in parts (unless it was a rusted stuck/seized mess) and the 
actual labor was less than about 2.5 hours.    Been a while since I 
did one though.


Maybe those labor rates have kinda gone up?   ;)


>And further.....
>
>I have never had them do a tach for me, never inquired.
>  I think the schematic is in the tech guide; if not I have it here.
>lc


There's a tach schematic online as well...  think I had a hand in 
that IIRC...  also been a while.


Ladies and gentlemen:   These tachs are NOT that complicated and 
usually the only thing to fail is the capacitors on the board which 
dry out, lose value and the tach reads way low.   Electronically they 
are not complex at all, fewer than about a dozen components on the 
board.   Calibrating them is also not difficult if you have a 
standard (freq. counter) and a correct signal source (a bell 
transformer will NOT work correctly).

And you should be able to get one fixed for less than 200 
bucks.   About the only thing that's not really repairable is the 
meter movement itself so if THAT is defective, shop around for 
another tach.   Otherwise, shouldn't be a huge issue to repair it.



>I also noticed that Larry has now found the SHIFT key - well, part of the
>time.  <GRIN>




About time...  ;)



tony..