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From: Paul Witlon on 14 Mar 2010 20:28
What are the options best options for obtaining a small (5-15VA)
toroidal power transformer with 115-0-115 primary having either 100
Ohms or 25 Ohms resistance per winding?

So I can then derive 50O Ohms in series or parallel.

Secondary voltage doesn't matter.

Paul Witlon
From: John Larkin on 14 Mar 2010 21:49
On Mon, 15 Mar 2010 00:28:37 GMT, paulwitlon(a)laritron.com (Paul
Witlon) wrote:

>What are the options best options for obtaining a small (5-15VA)
>toroidal power transformer with 115-0-115 primary having either 100
>Ohms or 25 Ohms resistance per winding?
>
>So I can then derive 50O Ohms in series or parallel.
>
>Secondary voltage doesn't matter.
>
>Paul Witlon

Why?

John

From: Phil Allison on 14 Mar 2010 22:02

"John Larkin"
(Paul Witlon) wrote:
>
>>What are the options best options for obtaining a small (5-15VA)
>>toroidal power transformer with 115-0-115 primary having either 100
>>Ohms or 25 Ohms resistance per winding?
>>
>>So I can then derive 50O Ohms in series or parallel.
>>
>>Secondary voltage doesn't matter.
>>
>>Paul Witlon
>
> Why?
>

** Must intend feeding it from a run of 50 ohm co-ax .......



..... Phil





From: Robert Baer on 15 Mar 2010 13:47
Paul Witlon wrote:
> What are the options best options for obtaining a small (5-15VA)
> toroidal power transformer with 115-0-115 primary having either 100
> Ohms or 25 Ohms resistance per winding?
>
> 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.
From: Robert Baer on 15 Mar 2010 13:48
Phil Allison wrote:
> "John Larkin"
> (Paul Witlon) wrote:
>>> What are the options best options for obtaining a small (5-15VA)
>>> toroidal power transformer with 115-0-115 primary having either 100
>>> Ohms or 25 Ohms resistance per winding?
>>>
>>> So I can then derive 50O Ohms in series or parallel.
>>>
>>> Secondary voltage doesn't matter.
>>>
>>> Paul Witlon
>> Why?
>>
>
> ** Must intend feeding it from a run of 50 ohm co-ax .......
>
>
>
> .... Phil
>
>
>
>
>
....in which case there will be a bandwidth problem.
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