list wisdom needed Triad MS90040

[Jim Simmons]

Both Wilson and John offer good advice.  Without a schematic diagram of 
the choke, you must determine if it has one core with two windings or 
two separate cores. 

John's suggestion will answer that.  If you put a small ac voltage on 
one winding you should expect to read zero, or very low, volts on the 
other winding.  This indicates that each coil has it's own core, and in 
this case it would seem to be suitable for your HB 516-2.  If you read 
substantial voltage on the other winding it indicates both coils are 
wound on the same core.  In that case it would not be suitable.

Jim, N5MSJ


Wilson Lamb wrote:
> The windings are obviously independent, since there are four wires.
>
> I don't think they would put two windings on the same core, because 
> the first one after the rectifier would induce ripple into the second...
>
> The old National HRO doghouse power supplies have xfmrs and chokes 
> potted in the same tarball.
>
> WL
> ----- Original Message ----- From: "J Forster" <jfor at QUIK.COM>
> To: <BOATANCHORS at LISTS.TEMPE.GOV>
> Sent: Friday, March 06, 2009 4:28 PM
> Subject: Re: list wisdom needed Triad MS90040
>
>
>> Excite one winding with a few volts of AC and measure what you get on 
>> the other.
>> Also, are there any voltage ratings on it?
>>
>> Best,
>> -John
>>
>> ============
>>
>> Michael Tortorella wrote:
>>
>>> G'day, all: I am building up a HB 516F-2 for my S-Line and have this
>>> interesting Triad "two chokes in one package" (the MS90040).  It has 4
>>> terminals, two for each choke.  The package states you can put the two
>>> chokes in series for 25H, or both in parallel for 6.3H.  My question 
>>> is, can
>>> I use this as if it were two separate chokes?  I want to use one in 
>>> the HV
>>> supply (800V) and one in the LV supply (300V).  I am worried about 
>>> possible
>>> mutual inductance.  Can anyone offer advice?
>>>
>>> Thanks and 73
>>>
>>> Mike W2IY
>>>
>>>
>>>
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