Baluns [was Re: Atari CX2600A parts...]

26 Feb 2012

...

   [...]
 Which is a Balun in the true sense.  A transfomer from the 75 Ohm
 unbalanced cable to the 300 ohm balanced TV input.  
 Okay, now I'm curious.  What's unbalanced about the one and balanced
 about the other?  (Of course, it quite possibly would be perfectly
 obvious if I knew more about the relevant interfaces.) 
'Unbalanced' is much the same thing as single-ended. Of the 2 wires 
involved, one is the signal, the other is ground. 

'Balanced' is differential. The 2 wires both carry the signal in 
antiphase to each other, neither is ground.

So a TV coaxail cable is unblaanced, in thatone of thew wires is th 
shield, wehich is grounded. A twin feeder is balanaced.

-tony

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Baluns [was Re: Atari CX2600A parts...]