[Boatanchors] audio transformer

[Jim Wiley]

Use a "70 volt" PA system matching transformer in reverse.  These
transformers have several taps on the primary winding, marked in watts.
For example, and if I remember correctly, using a "10 watt"
transformer,  the 10 watt tap is set to transform roughly 500 ohms to 8
ohms.  Such transformers can often be obtained for free from
scrapped-out PA system speakers - the transformers are riveted to the
side of the speaker frame.  Look for an office building being
remodeled.  New ones from radio shack are typically about $10.00.


- Jim, KL7CC


Dick KF4NS wrote:
> What you you guys suggest as a simple approach to adapting my various 
> 8 ohm audio output radios to my surplus telephone switchroom amplified 
> speaker which has 600 ohms as the lowest input impedence available?
>
> If I had a proper ratio xfmr I would try it but could not find one in 
> the parts box.  Any ideas? 
>
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