Re: 1949 6volt to 12 volt conversion (gauges)

Posted by HH56 On 2016/6/21 19:24:18

A possibility might be to use an instrument voltage regulator from a 55-56 and power the gauges from the output of the regulator as is done from 51 on. Downside is the 49 gauges are slightly different than the later gauges and wired directly to 6.3-7v in normal operation. The regulator puts out an average of 5 volts. Since the gauges in the 48-50s use a bimetal type sender with a heater element to control the action of the bimetal strip, the lower voltage may not be enough to power the heater to make the senders and gauges read properly.

I don't know if Runtz reducers are available in Australia but that would probably the simplest and safest to ensure proper operation although not the cheapest since you have 3 gauges needing power and each needs an adapter.http://www.fifthaveinternetgarage.com/electrical_parts.php
Here is one of many sites selling them. Scroll down the page to view the item and instructions.