[Boatanchors] LS-183

[Radio AI2Q]

Ernie, carefully measure the DC resistance of the primary windings, as that 
will give you an idea of their characteristics. Then you could connect a 
winding at a time to a Variac and bring up the primary voltage while 
measuring the secondary AC voltage.

I use an old Thordarson xfmr in my 813 G-G amp, and that's how I determined 
the correct primary winding for my application. Ditto for my 4-PR400A 
amplifier.

Needless to say, you must be careful, as the secondary develops very high 
levels of AC. Always use precautionary measures around HV. Be sure to 
connect your ac voltmeter leads prior to energizing the transformer, and 
only remove them after you have removed AC from the primary.

Hope that helps.

Vy 73, AI2Q, Alex
Member: ARRL, FOC, RSGB, CWops, QRP-L, Antique Wireless Association, New 
England Radio Discussion Society, DXCC Honor Roll, 16ØM DXCC, 8ØM DXCC
http://ai2q.org



----- Original Message ----- 
From: "Ernie Rader" <ernie at thevision.net>
To: <Boatanchors at mailman.qth.net>
Sent: Wednesday, November 30, 2016 7:57 PM
Subject: [Boatanchors] LS-183


> Good evening, Gents!!
>
> I’m in need of advice from those of you far more educated in the area of 
> boatanchors than me.  I was given a power transformer out of a working 
> home brew amplifier that used a single 4-1000A in the RF deck.  The 
> transformer is in working order, or at least it was at the time of the 
> pull.  On one side of the transformer are two poles with “3,000” between 
> them, and another couple with “3,500” between them, and a single pole with 
> “CT” next to it positioned between the two pairs.  All of this is quite 
> self-explanatory to me.
>
> On the other side of the transformer are 8 additional poles; I assume they’re 
> for varying degrees of 110vac or 220 vac.  The transformer feels like it 
> weighs about 80 pounds.
>
> Gentlemen; I’ve searched the Internet to no avail.  Nowhere have I been 
> able to find any information on this lump.  I would very much like to know 
> what the current capabilities of the secondary of this transformer are so 
> I can place some kind of value on it.
>
> Is anyone here able to point me in the right direction so this kind of 
> information can be determined?
>
> Any help would be most appreciated.
>
> Ernie Rader
> W5NH
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