[ARC5] 70.7V Line Transformer for audio matching

[John Hutchins]

Mark -

I use a small 115 to 6.3 volt transformer  ]  in the speaker cabinet.

Works for me.

Hutch

On 1/7/2019 5:31 PM, Mark K3MSB wrote:
> Hello all.
>
> I need to match the 4K audio output of my BC-348-R receiver to a 
> standard 8 ohm head set.
>
> I have a Stancor A-8102 70.7V line matching transformer on hand.
>
> The catalog shows the 8102 can handle 625, 1250, 2500, 5000 and 10000 
> ohms primary impedance
> and provide secondary impedances of 4, 8, or 16 ohms.
>
> The power options are 8,4,2,1 and 0.5 W.
>
> So... the impedance of the various wattage taps is computed by
>
> Z = E**2 / Pwr where E = 5000
>
> So my closest match would be the 1W tap (5000 = 5000 / 1).
>
> Is this correct? Hate to zorch something.....
>
> My other option would be to use the Lo-Z output on the BC-348-R (300 
> ohms) and pump that into my existing 600 ohms to 8 ohm box.
>
> 73 Mark K3MSB
>
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