Transformer Testing with Sweep Frequency Response

[@izzzzzz6]

Could we use a VNA to test for shorted turns?

[@leiferickson3183]

Thank you for sharing this info. I have recently been doing some simple DC resistance checks on a varaiety of guitar amplifier power and output transformers. I have noticed that the DC resistance of these smaller output transformer primaries and also high voltage secondaries on the power transformers roughly double with each halving of power for the set (Power and output transformer set). With all other things being equal, what effect does a higher DC resistance have on an output transformer primary?

[@izzzzzz6]

the higher the resistance the less power it can supply to the secondary. Thicker wire less resistance more power. Or longer wire also equals more resistance so it's a trade off on wire length and thickness for the size of the transformer. thinner wire can be much longer for the same volume and weight but it has more resistance and is less able to supply larger amounts of power. for more power everything needs to be sized up.