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Old 07-21-2015, 07:52 AM   #15
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1990 29' Excella
Stone Mountain , Georgia
Join Date: Jul 2010
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Originally Posted by malconium View Post
I am restoring a 1973 31' Airstream and I am starting to put the electrical system back together. I have generally been thinking that I would need to buy a new converter. I thought I would take a closer look at the one that was in the unit when I bought it because I had a vague recollection that it did not look like the original. Looking more closely I found that it did not seem to fit the original space and that it had an old price tag on it. So it seems like it was replaced somewhere along the line.

The converter-charger is a Magnetek model TU-750-6 and the price tag said that it sold for $205.66 when it was new. So I have a few questions that I would like some help with:

1.) How old would this unit be anyway?

2.) Is this a good product - if it is still working properly?

3.) How do I tell if it still works properly? I could easily enough hook it up and test the voltage at the output side. It says, though, that it has built in overload protection but how could I tell that the overload feature is still working?

4.) Is this something that a qualified RV shop can do a thorough check on?

5.) Should I add anything in the way of a charge protection gadget to this type of unit? If so specifically what gadget?


Do you happen to remember what the WATT draw was on the TU 750-6?


WBCCI 2456 Georgia Unit 32
1990 Excella 29' Centramatics
2016 GMC Sierra Crew Cab 2500 HD 4x4
6.6L Duramax + Allison, 3.73 axles
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Old 07-21-2015, 08:32 AM   #16
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2000 25' Safari
1999 34' Excella
Davidson County, NC , Highlands County, FL
Join Date: Aug 2006
Posts: 3,443
I have a Magnatek converter out in the garage that is working fine, just like it came from the factory. The problem with this converter is that it will boil the batteries dry if it is plugged in for a long time.

After exchanging several emails with Randy at Best Converter I settled on a PowerMax Boondocker converter for my Safari. Now I can plug in for months at a time and never worry about the battery being boiled dry. As a bonus, the battery charges faster when I'm using the generator.

2014 Silverado 1500 Crew Cab 5.3L maximum trailering package (yes, I'm towing the 34')
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Old 07-22-2015, 08:03 PM   #17
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1973 31' Sovereign
Portland , Oregon
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Originally Posted by dcasr View Post
Do you happen to remember what the WATT draw was on the TU 750-6?
No I don't remember the Wattage of the unit. You are responding to a pretty old post. Long ago I replaced the unit with a Xantrex power panel.

Only he who attempts the ridiculous can achieve the impossble.
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