T&T: Tachometer Problem

[Peter Bennett]

Tuesday, August 5, 2008, 5:07:20 PM, Arild wrote:

AJ> Scott H.E. Welch wrote:
>> The bad news is that I have not yet figured out what I can do about it, other
>> than installing a dedicated tachometer sender.
>>
>> Perhaps someone else has a suggestion?
AJ> REPLY
AJ> The easy solution is to place a dropping resistor from alternator output
AJ> to ground.  Something along the line of 20 - 30 ohms and 25 watts to 
AJ> dissipate the heat. 
AJ> This was a trick  often suggested by Balmar  to cure this tach drive issue.

AJ> Arild


But make _certain_ that that resistor (and/or the alternator output)
is disconnected from the battery when the engine is off.  On my boat,
I think I'd have to add a relay to disconnect the resistor when the
engine is off (or rather connect it only when the engine is running).


-- 
Peter Bennett, VE7CEI    Vancouver, B.C., Canada
Ennos 31 "Honeycomb"
GPS and NMEA info: http://vancouver-webpages.com/peter 
Vancouver Power Squadron: http://vancouver.powersquadron.ca