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#1
08-11-2015, 09:18 PM
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Motorola T5 Radio power transformer
My Motorola T5 radio fried the power transformer, specs say 315-315v filament 6.0v rectifier 4.75v what would be the best options for a replacement?
Last edited by sylvania; 08-11-2015 at 09:30 PM. Reason: wording 
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#3
08-12-2015, 09:19 PM
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motorola transformer
I have been checking out power transformers, someone have idea of how much tolerance I can safely be over or under on voltages 10 or 20% ? This set calls for 315/315v 6.0v filament and 4.75v rectifier.
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#4
08-12-2015, 09:42 PM
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Most rectifier tubes have 5 volt fils, so most transformers will be speced for a 5 volt winding, anything within 10 % is probably fine,(better lower than higher) sometimes you can swap rectifier tubes to get the final Bplus voltage closer to spec. Different rectifiers have differing voltage drops under load.
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#5
08-13-2015, 01:48 PM
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Current rating can matter. You want the heater windings to be able to supply the full load of the tubes they will drive.....Also if you can rig a temporary heater and B+ supply out of parts on hand measuring B+ current would probably be good.
If you try to pull more current than it is rated for you'll heat up your replacement and shorten it's life....
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