Toroid Xfmr Dual Pri 50 Ohms
in [Design]
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From: Paul Witlon on 15 Mar 2010 03:11 On Mon, 15 Mar 2010 09:47:25 -0800, Robert Baer <robertbaer(a)localnet.com> wrote: >> So I can then derive 50O Ohms in series or parallel. >> >> Secondary voltage doesn't matter. >> >> Paul Witlon > That is a hell of a lot of turns of small wire - which most likely >would not fit on the presumed "small" toroid. Sorry, that was a typo. Should have been _50_ Ohms. Anyway the 7 mAH from RS looks about right if I parallel the windings. http://docs-asia.origin.electrocomponents.com/webdocs/0028/0900766b800286a9.pdf Many thanks, Paul Winton.
From: pimpom on 15 Mar 2010 03:33 Paul Witlon wrote: > On Mon, 15 Mar 2010 09:47:25 -0800, Robert Baer > <robertbaer(a)localnet.com> wrote: > > >>> So I can then derive 50O Ohms in series or parallel. >>> >>> Secondary voltage doesn't matter. >>> >>> Paul Witlon >> That is a hell of a lot of turns of small wire - which most >> likely >> would not fit on the presumed "small" toroid. > > Sorry, that was a typo. Should have been _50_ Ohms. > > Anyway the 7 mAH from RS looks about right if I parallel the > windings. > > http://docs-asia.origin.electrocomponents.com/webdocs/0028/0900766b800286a9.pdf 7 mAH? That doesn't make sense as a spec for a transformer. If you tell us what you're trying to do, we'd be in a much better position to help. Unless you're quite experienced in electronics and are sure of what you're doing, you could be using a completely wrong approach to achieve what you want.
From: Phil Allison on 15 Mar 2010 03:32 "Paul Witlon" > > Anyway the 7 mAH from RS looks about right if I parallel the windings. ** Crikey: it is a 7VA unit - pal. > http://docs-asia.origin.electrocomponents.com/webdocs/0028/0900766b800286a9.pdf > ** You have seriously misread the data. That tranny has a single primary winding with a tapping at the mid point. So it CANNOT be paralleled or there will be a massive short. There is no way to get close to 50 ohms either. What planet are you on ?????? ..... Phil
From: Grant on 15 Mar 2010 04:07
On Mon, 15 Mar 2010 07:11:30 GMT, paulwitlon(a)laritron.com (Paul Witlon) wrote: >On Mon, 15 Mar 2010 09:47:25 -0800, Robert Baer ><robertbaer(a)localnet.com> wrote: > > >>> So I can then derive 50O Ohms in series or parallel. >>> >>> Secondary voltage doesn't matter. >>> >>> Paul Witlon >> That is a hell of a lot of turns of small wire - which most likely >>would not fit on the presumed "small" toroid. > >Sorry, that was a typo. Should have been _50_ Ohms. > >Anyway the 7 mAH from RS looks about right if I parallel the windings. A tiny battery might be rated at 7mAH, but not a transformer, another typo? > >http://docs-asia.origin.electrocomponents.com/webdocs/0028/0900766b800286a9.pdf > >Many thanks, > >Paul Winton. |