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Old 19th October 2003, 02:21 PM   #1
zobsky is offline zobsky  India
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Default humbucking filter choke - how different?

What is and how is a humbucking filter choke different from a normal power supply filter choke?

Can it be used as a PS filter choke, and are there any disadvantages/advantages? Its specs are:
16 Hy/175ma/96 ohms. Parallel 4 Hy/350ma/24 ohms


thanks, vin
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Old 19th October 2003, 04:30 PM   #2
zobsky is offline zobsky  India
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never mind, a web search turns up that a hum bucking choke taps a bit of the voltage and feeds it out of phase to the output sde, hence cancelling PS ripple.

if this is correct, i wouldn't want to use this for a hifi circuit
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Old 19th October 2003, 05:21 PM   #3
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Hi,

Quote:
if this is correct, i wouldn't want to use this for a hifi circuit
Why not?

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Old 19th October 2003, 06:20 PM   #4
zobsky is offline zobsky  India
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wouldn't tapping ripple and purposefully introducing it later in the circuit act like a sort of "feedforward loop". nothing inherently wrong in that, but as a beginner, i'd like to keep it simple.

that auction just ended, ..but if you think it might not be a bad idea, please explain and i will keep my eyes open next time.

BTW, .. this is for the 6sn7 pre-amp you helped me get working sometime ago. works well, .. and i have built in a 6bq5 SE amp too, but the thing hums, ..

what kind of current capability should i look for in a choke for this arrangement

thanks
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Old 19th October 2003, 09:23 PM   #5
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Hi,

Quote:
never mind, a web search turns up that a hum bucking choke taps a bit of the voltage and feeds it out of phase to the output sde, hence cancelling PS ripple.
Nothing's ever perfect, but that's how it works.

Quote:
BTW, .. this is for the 6sn7 pre-amp you helped me get working sometime ago. works well, .. and i have built in a 6bq5 SE amp too, but the thing hums, ..
I remember that. Hum is usually always induced by bad lay out...maybe we can solve that too?

Quote:
what kind of current capability should i look for in a choke for this arrangement
What's the current going through the circuit?

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