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Old 10-07-2019, 03:50 PM
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jr_tech jr_tech is offline
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Quote:
Originally Posted by jr_tech View Post
Scratches head... how does 122 Volts @ .39 Amps equal only 7.3 Watts?

jr
Answer: power factor for this unloaded power transformer must be quite small, about 0.15 !

Just measured an unloaded tv power transformer of similar size on a kill-a-watt meter, readings were:
122 Volts, 0.26Amps, 9 Watts, 34 VA, 60Hz, 0.28 PF (power factor), so I believe that the PF could be as low as 0.15.
Did you happen to get a power factor reading?

jr

Last edited by jr_tech; 10-07-2019 at 04:03 PM. Reason: add question
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