Patrick Dunford wrote:
In article in rec.audio.pro on Sun, 26
Sep 2004 01:42:42 +0100, Pooh Bear
says...
Patrick Dunford wrote:

In article in rec.audio.pro on Fri,
24 Sep 2004 19:46:58 GMT, Logan Shaw says...

By the way, as for why it's 48V, I think that has to do with
a compromise.

No, like the 600 ohms impedance, 48V comes to us from telephone
technology. That is the voltage that phantom power on your telephone line
uses.

There's nothing *phantom* about it - lol !

Only 2 wires used in telephony :-)

It's called phantom in both cases because it doesn't use extra wires to
carry the power.

Well, originally the notion was to "phantom" a telegraph line in top of
a telephone circuit by DC signalling between ground and both sides of the
telephone line.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."