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I had no idea! How did they ever cram 1948 electronics into those trains? Lenny

Nothing in 1953 was electronic. It was all relays and switches. My equipment is all original as it came from the factory. Probably the only "electronics" in a household back then was the radio or TV, (if they had one). Lenny

This makes a lot of sense. I did notice when this was presenting itself that it was mostly when the engine was running and the supply was 29 volts. So this is how the voltage to the gage was regulated. I hadn't even thought of indication differences between 24 and 29 volts. In the system I...

So I've been wondering. An automotive gage is essentially a DC voltmeter. A conventional DC voltmeter has two terminals, a positive and a negative. There is never any connection to chassis or a "ground" of any sort. So what could be inside these gages that is tied to ground? Yesterday I...

I was able to get back into this problem over the past weekend. First let me say thank you to everyone for your input. i would also like to particularly thank SST ret. for providing me with the temperature sender resistance values V temperature information. Having that information proved to...

I know. I've been waiting for the last two days for some nice weather. It's been so cold and rainy here it is just hard to think about working in the yard. I even had to light the wood stove this morning. And we had close to 90 degrees here just the other day. Thats New Hampshire for you...

I have a 1953 M37; I recently had to remove the throttle cable from the dashboard and after repairs were completed re install it. It was very tight working and after cramming it all back together I took a test drive. About 2 miles up the road I noticed that the temperature gage was reading...