Choke....substitute???

[jeffdavison]

Looking at a Bournes miniture toroid choke to possibly replace the C-354. in the ST70

Not being an EE I came here for the straight poop.

The 354 is rated @ 55 uH & 55 ohms

the Bournes that I am looking at is rated at 56 uH at .06 ohms.


Can the Bournes choke be used as a substitute? What changes to the rest of the circuit need to be made? Could I just put a 54.96 ohm resistor in serial to make it work?

Reason into why Im looking at it is it's size / compactness mostly but toroids have some other bonuses as well.

Jeff Davison

[jeffdavison]

oops,,,, got the specs wrong.... my bad

going to have to do more research then get back to y'all


question still remains.. If I find a torois with the same Henry rating ( 1.5 H)
but lower DC resistance can it be used? mods? etc


JD

[Uncle Ned]

oops,,,, got the specs wrong.... my bad going to have to do more research then get back to y'all question still remains.. If I find a torois with the same Henry rating ( 1.5 H) but lower DC resistance can it be used? mods? etc JD

A DC choke would probably have to go on a C-core or EI core, I don't think toroid cores like DC very well. At least I remember the toroid folks complaining that Japan was a bad place to try to sell toroids due to some kind of DC offset in their line voltage (which is 100VAC).

[Shannon Parks]

Hi Jeff,

You'll probably find that high inductance chokes for audio are a little difficult to source compare to RF chokes. Even my boss - an RF engineer - was surprised when sourcing a .5H choke for a wide bandwidth signal generator. Hammond will probably turn up as the manufacturer during searches.