I need to help settle an arguement about the useage of a LT-600 transformer.
I say that the LT600 is a simple 600 ohm to high impedance transformer as it is used for say to take a 600 ohm feed from a phone system and input the signal to a mixer for page and so forth. I have a co-worker that says you can take this transformer and input a unbalanced signal into it and balance it at the other end.
Who wants to settle this?
I say that the LT600 is a simple 600 ohm to high impedance transformer as it is used for say to take a 600 ohm feed from a phone system and input the signal to a mixer for page and so forth. I have a co-worker that says you can take this transformer and input a unbalanced signal into it and balance it at the other end.
Who wants to settle this?
There is no centre tap so it is not balanced. You could feed a high impedance signal into it and produce a 600R level that could be used as balanced but not the other way around. Balanced is always 600R or less.
"Balanced is always 600R or less. "
Nonsense.
The phone company standard is 600Ω, nothing more.
Any impedance may be balanced.
"balance it at the other end."
You may run it into a balanced input, and it will work just fine.
The most important thing is a transformer has galvanic isolation, whether it is balanced or unbalanced.
As Burnedfingers knows, even the best (hand-nulled for 100dB CMRR) electronic-balanced input will not break a bad ground loop, but even an inexpensive unbalanced transformer will.
Balanced transformers must be bi-filar for good RFI rejection, even then the best wire can only be twisted close enough to achieve about 65dB of RFI rejection.
The best bang-for-the-buck seems to be a transformer driving an electronic-balanced network.
https://www.edcorusa.com/tpc-series
Nonsense.
The phone company standard is 600Ω, nothing more.
Any impedance may be balanced.
"balance it at the other end."
You may run it into a balanced input, and it will work just fine.
The most important thing is a transformer has galvanic isolation, whether it is balanced or unbalanced.
As Burnedfingers knows, even the best (hand-nulled for 100dB CMRR) electronic-balanced input will not break a bad ground loop, but even an inexpensive unbalanced transformer will.
Balanced transformers must be bi-filar for good RFI rejection, even then the best wire can only be twisted close enough to achieve about 65dB of RFI rejection.
The best bang-for-the-buck seems to be a transformer driving an electronic-balanced network.
https://www.edcorusa.com/tpc-series
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