[ARC5] 70.7V Line Transformer for audio matching

[Bob kb8tq]

Hi

Nothing is going to break from a mismatch at audio. One “traditional” approach
is to switch taps until you find the one that is loudest or “sounds best”. 

Bob

> On Jan 7, 2019, at 6:31 PM, Mark K3MSB <mark.k3msb at gmail.com> 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
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html