K12M / K12G Current Draw

wa5znu · 12th December 2009, 04:40 AM

What is the expected AC line current draw of a K12G? I'm getting ~0.7A after warmup, and no variation with or without drive. Thanks!

Tom Bavis · 12th December 2009, 05:12 PM

That sounds a trifle high to me. About 32 watts for B+, 20 watts for heaters, power factor of 0.85 gives 61 VA or 0.5A at 120V. Of course that's a precise calculation based on three SWAGs... (stupid wild a** guesses...)

12th December 2009, 04:40 AM	#1
wa5znu diyAudio Member Join Date: Dec 2009	K12M / K12G Current Draw What is the expected AC line current draw of a K12G? I'm getting ~0.7A after warmup, and no variation with or without drive. Thanks!

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12th December 2009, 05:12 PM	#2
Tom Bavis diyAudio Member Join Date: Jun 2002 Location: Macedon NY	That sounds a trifle high to me. About 32 watts for B+, 20 watts for heaters, power factor of 0.85 gives 61 VA or 0.5A at 120V. Of course that's a precise calculation based on three SWAGs... (stupid wild a** guesses...)