600-ohm to 600-ohm line transformer

R

riviera321

Guest
I need a 600-ohm to 600-ohm line transformer for an audio device, thay
also caled them Audio transformer...

What are those type of transformer ?

how many spire (turn), what's are the voltage, where could I find them
?

Any information about it will be appreciate.

Thank,

riviera321@hotmail.com
 
"riviera321" <riviera321@hotmail.com> wrote in message
news:51d6af5f.0501311318.4412479@posting.google.com...
I need a 600-ohm to 600-ohm line transformer for an audio device, thay
also caled them Audio transformer...

What are those type of transformer ?

how many spire (turn), what's are the voltage, where could I find them
?

Any information about it will be appreciate.

Thank,

riviera321@hotmail.com
Click to expand...
Try www.Rhombus-ind.com
 
riviera321 (riviera321@hotmail.com) writes:
I need a 600-ohm to 600-ohm line transformer for an audio device, thay
also caled them Audio transformer...

What are those type of transformer ?

how many spire (turn), what's are the voltage, where could I find them
?

Any information about it will be appreciate.

You asked this already, don't expect email when posting to a newsgorup.
Click to expand...

They are audio transformers, for applications where isolation is needed
but not voltage step up or step down is needed.

You used to get them nice and bulky, for good audio response. I don't
know where you can get them nowadays.

As someone pointed out, they are commonly found in modems these days, so
dig up a modem that nobody wants due to being too slow, and grab the
transformer off that. It will be the only transformer on the modem board
(assuming it's an internal modem).

Radio Shack had some tiny ones for a while, but I don't suppose they
still carry them.

Michael
 
et472 posted:

<< riviera321 (riviera321@hotmail.com) writes:
I need a 600-ohm to 600-ohm line transformer for an audio device, thay
also caled them Audio transformer...

What are those type of transformer ?

how many spire (turn), what's are the voltage, where could I find them
?

Any information about it will be appreciate.

You asked this already, don't expect email when posting to a newsgorup.
Click to expand...

They are audio transformers, for applications where isolation is needed
but not voltage step up or step down is needed.

You used to get them nice and bulky, for good audio response. I don't
know where you can get them nowadays.

As someone pointed out, they are commonly found in modems these days, so
dig up a modem that nobody wants due to being too slow, and grab the
transformer off that. It will be the only transformer on the modem board
(assuming it's an internal modem).

Radio Shack had some tiny ones for a while, but I don't suppose they
still carry them.

There are many types of 600:600 Ohm transformers. Do you need it tapped? Both
sides or only one side? Do you need a spit primary or secondary so you can do
something to current flow? How much current must it handle?

There are many suppliers. I did a google for "600 Ohm line transformer" and
got a bunch of hits. Here's one:

<A HREF="http://www.sarah-grp.com/english/submenu-e.htm">SARAH, INC.</A>

Don
 
Michael Black wrote:
They are audio transformers, for applications where isolation is
needed but not voltage step up or step down is needed.

You used to get them nice and bulky, for good audio response. I don't
know where you can get them nowadays.

As someone pointed out, they are commonly found in modems these days,
so dig up a modem that nobody wants due to being too slow, and grab
the transformer off that. It will be the only transformer on the
modem board (assuming it's an internal modem).
Click to expand...
They are also found in cordless telephones.
 
-------------------------------------
riviera321 wrote:


I need 600 ohms to 600 ohms 1:1 transformer Turns so I could design it by
my self.

If any one know the Turns on Primary and Secondary please let me know..

Regards,

Julius


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juliuspk wrote:
I need 600 ohms to 600 ohms 1:1 transformer Turns so I could design it by
my self.

If any one know the Turns on Primary and Secondary please let me know..
Click to expand...
The number of turns required depends on the frequency of operation and
the permeability of the core. You need enough turns to make the
reactance of the coil significantly greater than your operating
impedance. You don't want too many turns, as that would increase
losses. 1000 turns might be right for one frequency, but you would
only need 10 at some other higher frequency. You need a lot of turns
for audio.
 
On Fri, 22 Jul 2005 10:01:23 +0000, juliuspk wrote:

I need 600 ohms to 600 ohms 1:1 transformer Turns so I could design it
by my self.

If any one know the Turns on Primary and Secondary please let me know..
Click to expand...
Why not just cannibalize one out of a modem?

Good Luck!
Rich
 
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