[Boatanchors] Measuring xfmr Capacity Re: FS: Power transformer

[Paul Kraemer]

Everyone
I have a pdf of an article taken from an old issue of Science and Mechanics 
"Custom Making Transformers"
Covers everything you need to know to make your own EI design transformers 
and tells how to do it.
Perhaps someone more technically adept could suggest how I could post it 
someplace to share with the masses rather than sending email copies to 
everyone who would like to see it.
Paul K0UYA
----- Original Message ----- 
From: <brianclarke01 at optusnet.com.au>
To: "RJ Mattson" <rjmattson at hvi.net>
Cc: <boatanchors at mailman.qth.net>
Sent: Wednesday, February 17, 2010 10:59 PM
Subject: Re: [Boatanchors] Measuring xfmr Capacity Re: FS: Power transformer


> Hello Bob,
>
> No, the weight will not help, because accountants have gotten their sticky 
> fingers into the cost of materials that go into transformers, which has 
> led to different distributions of iron and copper, depending on metals 
> prices.
>
> The only reliable way to estimate power handling capacity is to measure 
> the cross-sectional area of the winding core - and put that into a formula 
> that is in many transformer design texts. Unfortunately, I am away from my 
> sources and cannot give you the formula.
>
> 73 de Brian, VK2GCE
>
>
>
>
>> RJ Mattson <rjmattson at hvi.net> wrote:
>>
>> Hi Gary,
>> I have a working used xfmr here that I am curious about its capacity.
>> Can I get a rough idea of total watts by weighing with endbells (3.5
>> lbs)?
>> Or, measuring the iron laminate size?
>> Three sec: 735vac, 6.3v and 5v windings.
>> bob...w2ami
>>
>> ----- Original Message ----- 
>> From: "Gary" <xfrmrs at roadrunner.com>
>> Subject: Re: [Boatanchors] FS: Power transformer
>>
>>
>> I can assure everyone that this is a rewind that was done 5 months ago.
>> The
>> secondary current on the hv is 350 mils. I apologize for leaving that
>> bit of
>> information out.
>> Regards,
>> Gary...WZ1M
>>
>> ______________________________________________________________
>> Boatanchors mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Boatanchors at mailman.qth.net
>>
>> List Administrator: Duane Fischer, W8DBF
>> ** For Assistance: dfischer at usol.com **
>>
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors at mailman.qth.net
>
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html