[Boatanchors] BAMA Voltage Reducer Article

[jmfranke]

Yes, this will work, but for reducing the voltage it is better to put the 
secondary in series with the primary. The phasing of the secondary is 
selected to reduce the voltage across the primary. What is being done is the 
secondary winding is being added to the turns in the primary winding. The 
supply neutral is connected the free end of the primary and the supply line 
is connected to the free end of the secondary. The output neutral is 
connected to the input neutral and the output line is connected to the tap 
between the primary and secondary. The reduces the voltage across the 
primary which reduces the transformer losses. Too many transformers are 
designed with the input voltage getting close to core saturation and the 
method suggested in the BAMA article puts the higher line voltage across the 
primary, which pushes the transformer even closer to saturation.

John  WA4WDL
--------------------------------------------------
From: "J. Forster" <jfor at quikus.com>
Sent: Sunday, November 18, 2012 10:07 AM
To: "Jerry" <jsternmd at att.net>
Cc: <boatanchors at mailman.qth.net>
Subject: Re: [Boatanchors] BAMA Voltage Reducer Article

> Just wire up a 6 or 12 volt filament transformer to buck the line.
>
> Primary goes across line and neutral; secondary goes in series with hot
> side between line and load, phased to reduce line voltage; secondary amp
> capacity must be > load current.
>
> Done,
>
> -John
>
> ===============
>
>
>> A while ago the BAMA list had a nice article on building a voltage 
>> reducer
>> to drop modern line voltage back t0o 110-115 vac.  BAMA mirror site
>> Edebris
>> does not have the article.  If someone has a copy can they email to me at
>> jsternmd {at} att {dot} net
>>
>> Thanks
>>
>> Jerry
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