10-18-2016, 11:19 PM
Physically the transformer is larger than the 60cy unit. It takes more wire to wrap around the core as it is larger. More (longer) the wire the higher the resistance. Seems like I posted that it had a 25cy transformer.
Resistance reading don't tell the whole story. It's easier and quicker to remove the rectifier tube and measure the HV from plate to plate. Most of the time I don't bother to do that I look for signs of severe overheating, larger glob of wax under the transformer, and does it smell burnt?
If it passes the visual and smell test I let her rip. Bottom line is that if it is shorted it's going to self destruct. Generally it just takes out the transformer and not other components like the field coil or filter choke.
Audio transformers are a different story as the copper wire used in manufacture is a small gauge and can rot rather than overheating from passing large amounts of current.
Resistance reading don't tell the whole story. It's easier and quicker to remove the rectifier tube and measure the HV from plate to plate. Most of the time I don't bother to do that I look for signs of severe overheating, larger glob of wax under the transformer, and does it smell burnt?
If it passes the visual and smell test I let her rip. Bottom line is that if it is shorted it's going to self destruct. Generally it just takes out the transformer and not other components like the field coil or filter choke.
Audio transformers are a different story as the copper wire used in manufacture is a small gauge and can rot rather than overheating from passing large amounts of current.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got it!
Terry
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