Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

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RE: Be clear on the inductance ratings of the chokes.

203.145.92.156

Posted by andy2667 on October 22, 2009 at 16:41:45

In Reply to: Be clear on the inductance ratings of the chokes. posted by Al Sekela on October 22, 2009 at 15:10:12:

Hi Sekela,

Thank you for your information. Is a choke in the 10h - 20H rane suitable for this application? I have read some old post that the DC resistance value of the choke sholdbe close to the supply main frequency. I.e For 50 hz area, prefer to have dc resistance close to 50 ohm while in 60 hz area prefer to have the dc resistance close to 60 ohm . Is this correct? If this is true, I may need to custom made a choke with 10h - 20h inductance and close to 50ohm dc resistance as I am in Hong Kong with 50 hz supply main.

It would be easier for me to get alternative choke locally and Hammond is not available in the generl consumer market in Hong Kong. Shipping it across the ocean will be prohitly expensive compared with the price of the choke.

By the way, how do you find this choke tweak compared with a well implemented ac filter (e.g a diy Risch filter).


Thanks

Andy

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