[TR] parts I used for Alternator conversion on my TR4

[Randall]

> OK, Randall's mentioned this a couple of times.
> 1) What gauge wire for the shunt?

16 AWG seemed to work fine for me.  But you missed the more important
question : How long should it be?  The answer varies by ammeter, on my early
TR3A, I found that 3.5 inches was about right.  Brian Kemp measured a TR6
ammeter and found that it would need 8 inches of 16 AWG.  

The point is that every ammeter has some internal resistance (although it is
too low to measure with most ohmmeters), and the shunt needs to have nearly
the same resistance (for a 50% shunt of course).  My TR3A ammeter was about
1.2 milliohms, Brian's TR6 was 2.7 milliohms.  16 AWG is about 4 milliohms
per foot.

One way to determine this is to use the headlights as a fixed load, and
adjust the length of the shunt until the ammeter reads 1/2 what it does
without the shunt.

> 2) Just put single female /double male adapter on the 
> terminals and add the shunt?

Should be adequate, although I might be tempted to do something a bit more
permanent.  Here's a shot of mine, taken as I was disassembling TS39781LO:
http://tinyurl.com/ybvtl48

> 3) Easy as pie?

Came out a whole lot better than the last pie I tried to bake!
<G>

Randall