Carl,
Maybe a parallel resistor would bring it back in line. Here is a calculator
link. http://www.1728.com/resistrs.htm
If your sender measures 42 ohms at 212 and you want it to read 33 ohms in
order to place the needle on the 212 on your gauge then a 150 ohm resistor
in parallel would make it about right. At least in theory +/- something
maybe.
How linear it would be is anybodys guess! You could also just listen for
the hiss and watch for the vapor....
Mark
Nashville
http://www.arrestmered.com
Figures..
just got a return call from that nice guy at MO-MA gauge repair..
He tells me SMITHS Temperature Transmitters for TR4s and TR4-As should
measure as follows;
SMITHS TT3802/00A = 37.4 to 47.6 ohms @ 212 F boiling point (early TR4 &
late
TR4A)
SMITHS TT3804/00A = 27.9 to 35.7 ohms @ 212 F boiling point (mid TR4 & early
TR4A)
Now I see my old beat up 3804 behaves more like a 3802.
And I need to locate a new transmitter that hits close to 33 ohms at
boiling..
Carl
'63 TR4 since '74
=== This list supported in part by The Vintage Triumph Register
=== http://www.vtr.org
|