Re: BigKev
Posted by HH56 On 2022/12/7 10:38:19
37 gauges were magnetic so some movement of the needle is normal when it first gets power before things become stable. The gauge must also be grounded to work properly.
The always on or potential coil is weaker, goes active and will want to pull the needle one direction. The series coil connected to the sender, being slightly stronger, will overpower it and want to pull the needle to the other side. The changing difference will make the needle track as the sender changes the coil strength.
No idea on the resistance range for that gauge and sender but the old and now obsolete range of 100 empty and 0 full was used on S-W magnetic gauges in Clippers. KM Lifestyes has recently made new senders for other 37 owners if you find you need one.
Attach file:
gauge.jpg (89.13 KB)
The always on or potential coil is weaker, goes active and will want to pull the needle one direction. The series coil connected to the sender, being slightly stronger, will overpower it and want to pull the needle to the other side. The changing difference will make the needle track as the sender changes the coil strength.
No idea on the resistance range for that gauge and sender but the old and now obsolete range of 100 empty and 0 full was used on S-W magnetic gauges in Clippers. KM Lifestyes has recently made new senders for other 37 owners if you find you need one.
Attach file:
gauge.jpg (89.13 KB)This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=251222