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Plate chokes & Power chokes
Plate chokes & Power chokes
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Old 18th October 2006, 04:29 PM   #1
JC951t is offline JC951t  Taiwan
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Default Plate chokes & Power chokes

Hi Guys,
I'm new to this tube forum. I would appreciate
if someone would englighten on the differenecs
on the above.

Thank You Kindly
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Old 18th October 2006, 05:10 PM   #2
astouffer is online now astouffer  United States
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Location: Pittsburgh, crumbling wasteland
I think it has to do with the resonant frequency of the choke. You want a flat response over the audio range.
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Old 18th October 2006, 05:17 PM   #3
cerrem is offline cerrem  United States
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Plate chokes are usually used for audio gain stage applications or RF, IF radio stages...
SO the inductance must be large enough for lowest frequency of interest, which is related the the plate resistance.... As the Inductive reactance= the plate resistance at the -3dB low frequency Pole...
Then your winding capacitance must be low enough so to properly pass the high frequency content....

A power choke is a inductor used in the power supply for filtering the ripple in the power supply rail....It's properties are not as stringent as the plate choke...but still you need proper amount of inductance to reduce the current ripple....It is also used in conjunction with a filter capacitor to lower the voltage ripple.

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Old 19th October 2006, 04:18 PM   #4
JC951t is offline JC951t  Taiwan
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Join Date: Sep 2006
Hi Guys,
Thanks for the advice. Aside from the high inductance
value, I do not see any other differences besides the
the much higher price over power chokes.

Thanks again
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