I am wanting to wind my own 10H choke. Any good info on the web as far as gauge and number of turns ect that you know of? Thanks.
cool
Hi Tim,
I've been thinking about trying this too. Just sort of practice to trying output transformers. There is a good section in RDH4 that walks you through all of the calculations. I don't remember any good web sources, but will check some of my links.
Sherman-That calculator is for an air core inductor not an iron core choke. Good for RF or speaker crossovers, not so good for filter chokes.
Michael
Hi Tim,
I've been thinking about trying this too. Just sort of practice to trying output transformers. There is a good section in RDH4 that walks you through all of the calculations. I don't remember any good web sources, but will check some of my links.
Sherman-That calculator is for an air core inductor not an iron core choke. Good for RF or speaker crossovers, not so good for filter chokes.
Michael
If a german link i OK, have a look at this page:
http://www.jogis-roehrenbude.de/
Scroll the sidebar all the way down (almost)
http://www.jogis-roehrenbude.de/
Scroll the sidebar all the way down (almost)
Silver is almost the exact same as copper except for color and price. Nothing changes, except maybe a slight increase in current capacity. Much more benefit using say, GOSS as opposed to a NOSS core.
Hey Tim, I'd go with 2 or 3000 turns of wire adequate for the current draw, on a gapped core of sufficient size to hold the wire. You can use SWAG's to find such things as winding area needed, based on turns and wire diameter. I happen to have a table for all those figures though. 😀
If it's for a pi filter, you can space (random) wind, just put the wire on evenly in semi-layers. If choke input, you'll need to wind even layers and insulate between each with a strip of plastic or paper.
Tim
Hey Tim, I'd go with 2 or 3000 turns of wire adequate for the current draw, on a gapped core of sufficient size to hold the wire. You can use SWAG's to find such things as winding area needed, based on turns and wire diameter. I happen to have a table for all those figures though. 😀
If it's for a pi filter, you can space (random) wind, just put the wire on evenly in semi-layers. If choke input, you'll need to wind even layers and insulate between each with a strip of plastic or paper.
Tim
Hi,
If you use silver wire as hook-up wire etc. in your system it does make alot of sense to use it throughout.
Cheers,😉
If you use silver wire as hook-up wire etc. in your system it does make alot of sense to use it throughout.
Cheers,😉
has anyone tried winding their own choke for 60's lovely guitar 50watter amp
L = 3 Hy, 250mA DC
D.C.R. = 112Ω
L = 3 Hy, 250mA DC
D.C.R. = 112Ω
That is two 18W flouro light chokes in series:
http://www.diyaudio.com/forums/power-supplies/303924-magnetic-ballast-power-choke.html
nice thanks for the info
looking at tridonic atco fluorecent,following your link it has two sets of coil two rows c lamination,do i have to find similar design or any 18w fluorecent ballast(what we call it here,local name)will do?
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A flourescent choke is designed for a mains AC voltage, and a tube operating AC current - so a 240VAC 18W ballast will generically have the same inductance.
The ballast only has one 'coil'.
Patrick presents a huge amount of tech detail and high quality comment - a great resource for those keen to wind their own 'anything'.
thanks trobbins,let me rephrase your post here fluoro ballast ..............The EC9 type 9W flouro ballast is still available new at about AUD$6 - damn cheap, and very compact. It appears that this is the ~3-4H choke used in the Mudlark..............meaning any 9w fluoro ballast here will do.sound favorable to me as my previus post 3hy requirement
L = 3 Hy, 250mA DC
D.C.R. = 112Ω
A 9W tube would be half the operating current nominally. The tube operating voltage, and the mains voltage is the same nominally, so the impedance needed by the ballast to drop the same voltage is nominally twice that for an 18W tube. I haven't come across a 9W ballast yet, so haven't tested its inductance drop off with DC current, or its winding resistance.
I do recall looking up info on the Mudlark years ago, but can't remember if I found much.
I do recall looking up info on the Mudlark years ago, but can't remember if I found much.
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