[Boatanchors] Transformers 101

Wed, 14 May 2003 18:27:45 -0400

You could buy two identical transformers of type 2 or 3 below as you list
them.

Connect each secondary in parallel.

For the Stewart Warner model you would then have 320-0-320 @ 120 ma, 5 volts
@ 4 amps, and 6.3 volts at 4.4 amps.

The down side is twice the cost.

A Hammond model HX276X is a good match at $62.92 from RadioDaze.

http://www.radiodaze.com/hammond01.htm

I'd really try the surplus or scrounger route first.

Pat
wa4tuk

> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of
> [email protected]
> Sent: Wednesday, May 14, 2003 3:46 PM
> To: [email protected]
> Subject: [Boatanchors] Transformers 101
>
>
> All,
>
> I'm in need of a review.  I'm looking for a Power Transformer
> that has the following characteristics;
>
> MY NEEDS:
> 320V each side, center tapped, 120ma, 5v@3amp, 6.4v@3amp or more.
>
> This is for a project from the Dec 1952 issue of QST.  It's the
> 75 watts with an Economy Power Supply.
>
> I have done a search and found some power transformers with the
> following ratings:
>
> CYBER LAND POWER TRANSFORMERS:
> 1. RCA 970445       320V @75MA, 5V @2A, 6.3V @2A
>
> 2. STEWART WARNER   320-0-320V @60MA, 5V @2A, 6.3V @2.2A, MODEL 62TC16
>
> 3. PHILCO 32-7180N  320-0-320V @55MA, 5V 2A, 6.3V 1.5A, MODEL 80/84
>
> First, does anyone have a power transformer that meets my needs
> with the ratings listed above.  If not, can I in some way modify
> the power transformers (item 1, 2 3) to meet the characteristics
> that I need?
>
> Tks,
>
> John KD7KFT
>
>
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