Hi, i bought Haufe RK 270 input tranformer (1:1), for the use between dac & preamplifier.
I have two questions:
(1) -I only now got to look manufacturer datasheet:
Have i understood this right, that it will have frequency range of 40hz-20khz?
So it will not be good choise for this application for whole frequency range?..
(2) -How do i connect rca-connector to it?
Which number do i connect (red signal) wire input and output, and which number neutral input and output (black)?
Do i have to measure it and figure it out, or can it be seen from upper diagram?
Here is picture for easier explaining, thanks!
'
I have two questions:
(1) -I only now got to look manufacturer datasheet:
Have i understood this right, that it will have frequency range of 40hz-20khz?
So it will not be good choise for this application for whole frequency range?..
(2) -How do i connect rca-connector to it?
Which number do i connect (red signal) wire input and output, and which number neutral input and output (black)?
Do i have to measure it and figure it out, or can it be seen from upper diagram?
Here is picture for easier explaining, thanks!
'
Last edited:
Right then... and this is just how I imagine it is,
So pins 1 and 2 are one half of a primary winding and that pins 3 and 4 are the other half. So a bit like a mains transformer with 115-0 and 115-0 windings. It is up to you how you use them, in parallel or series or driven in push pull. Can't imagine the last one applies to small signal stuff though.
Pins 5 and 6 are the single winding secondary.
Pin 7. Well a search of what Schirm means and I get, Umbrella, Shade and Screen. So I would say pin 7 is the screen to be used for shielding. Connect to ground I guess.
Frequency response 40 to 20kHz. That is pretty decent really. Look at the 0.3db deviation. So at 30Hz or 21kHz it will not suddenly drop off in response. You should measure it for interest with the secondary terminated correctly and the primary (s) fed from a low impedance voltage source.
As for polarities. Be consistent left and right channels but there may be no correct/incorrect way. You could end up with an overall phase reversal but if both channels are the same you will not notice. A scope check would confirm that in seconds.
That's my best guess on it all 🙂
So pins 1 and 2 are one half of a primary winding and that pins 3 and 4 are the other half. So a bit like a mains transformer with 115-0 and 115-0 windings. It is up to you how you use them, in parallel or series or driven in push pull. Can't imagine the last one applies to small signal stuff though.
Pins 5 and 6 are the single winding secondary.
Pin 7. Well a search of what Schirm means and I get, Umbrella, Shade and Screen. So I would say pin 7 is the screen to be used for shielding. Connect to ground I guess.
Frequency response 40 to 20kHz. That is pretty decent really. Look at the 0.3db deviation. So at 30Hz or 21kHz it will not suddenly drop off in response. You should measure it for interest with the secondary terminated correctly and the primary (s) fed from a low impedance voltage source.
As for polarities. Be consistent left and right channels but there may be no correct/incorrect way. You could end up with an overall phase reversal but if both channels are the same you will not notice. A scope check would confirm that in seconds.
That's my best guess on it all 🙂
