tk@halmi
Well-known member
Few days ago I got samples of a bunch of different Iron Core Transformers Without Static Screens.
I have ordered the tranformers with shielding. It is far from proper mu shielding, but better than nothing. The vendor will, for about an extra buck, wrap a copper foil around the unit and bring its connection out to a pin.
Anyhow, the 1:1 has a very nice square wave response. Tiny little overshoot, no ringing and a pretty good bandwidth (a lot on the top!). I was thinking of hooking one in front of an SSM2019 or an INA103 and make a capless pre, and calling it the "Heresy".
Then I went on to try the higher ratio ones to see if it were possible to use them as mic input. The 1:8 transformer looks interesting, but I have to find good termination/zobel network values to improve the step response.
These transformers have no shield between windings. Would housing them in a mu foil/sheet make sense or is it all lost without the internal screen?
Could they be used as microphone input transformers? If not what are the shortcomings.
Thanks,
Tamas
I have ordered the tranformers with shielding. It is far from proper mu shielding, but better than nothing. The vendor will, for about an extra buck, wrap a copper foil around the unit and bring its connection out to a pin.
Anyhow, the 1:1 has a very nice square wave response. Tiny little overshoot, no ringing and a pretty good bandwidth (a lot on the top!). I was thinking of hooking one in front of an SSM2019 or an INA103 and make a capless pre, and calling it the "Heresy".
Then I went on to try the higher ratio ones to see if it were possible to use them as mic input. The 1:8 transformer looks interesting, but I have to find good termination/zobel network values to improve the step response.
These transformers have no shield between windings. Would housing them in a mu foil/sheet make sense or is it all lost without the internal screen?
Could they be used as microphone input transformers? If not what are the shortcomings.
Thanks,
Tamas