[Milsurplus] LS-3 Speaker

[john p hutchins]

Foster -

Well that explains it.  I have the BC-348 original audio transformer 
tapped at 3000 - Ohm output, piped to the output jack. This feeds into 
the outboard speaker box.  Since the output does not have to produce a 
lot of volume to drive a 4" speaker thus saturation is not a issue.  The 
bass tone sounds nice.

Later
Hutch

. Forster wrote:

>It's not so silly. 110 : 6.3 is a ratio of  about 17.5. That is the turns ratio.
>The impedance ratio is that squared or:  about 306 : 1
>
>So if the load is an 8 ohm speaker, the reflected impedance at the primary is
>about 2450 ohms, which is not unreasonable. If it's an ordinary tube output,
>there is a bit too much iron. If the output is single ended (likely), there could
>be a saturation issue, because power transformers are not gapped.
>
>All in all, not a crazy choice.
>-John.
>
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>john p hutchins wrote:
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>>I know you all will just kringe but I use a 110->6.3 1A volt filiment
>>transformer in an old motorola 8 ohm speaker
>>box.  This was 30 years ago long before the days of the mighty
>>Internet.  Still works great with my bc-348!
>>Later
>>Hutch
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