Winding the secondary closest to the core reduces the length of wire
used, which secondary Cu loss. This is also done on the SB-220.
On Jul 23, 2005, at 6:14 PM, Will Matney wrote:
> Bill,
>
> It definately has a high-ohm short in the secondary. They've wound the
> primary on the outside which I dont like to do. That way the
> secondaries leaking to the core instead of the primary. If the primary
> had been the first coil and it did that, it would blow a fuse most
> likely. The best check to find it is use a megger or a hipot, and it
> would make it show quickly.
>
> Best,
>
> Will
>
>
> ----- Original Message -----
> From: "Bill Smith" <ko4nrbs@yahoo.com>
> To: amps@contesting.com
> Subject: [Amps] Transformer core shorted to secondary winding??
> Date: Sat, 23 Jul 2005 17:54:02 -0700 (PDT)
>
>>
>> Transformer is a 3400vac CT
>>
>> All Secondary leads lifted and using a HV Probe (Fluke
>> 80K-40)
>>
>> CT to chassis- 843 volts
>> One side of secondary to chassis- 2450
>> Other side of secondary to chassis- 863
>>
>> No continuity between secondary windings and the
>> chassis when checked with an ohm meter.
>>
>> 73,
>> Bill
>>
>>
>>
>> Bill Smith KO4NR
>>
>>
>>
>> ____________________________________________________
>> Start your day with Yahoo! - make it your home page
>> http://www.yahoo.com/r/hs
>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>
>
> --
> ___________________________________________________________
> Sign-up for Ads Free at Mail.com
> http://promo.mail.com/adsfreejump.htm
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|