I have now found a coil that should be ideal.159Y Hammond Manufacturing | Mouser
It can cary 750mH, has 600mH and 11Ohm.
I choose high current capability so that a single pre regulator can drive a stereo set of Paradise.
It can cary 750mH, has 600mH and 11Ohm.
I choose high current capability so that a single pre regulator can drive a stereo set of Paradise.
Or, at the cost of a few volts, this one 158T Hammond Manufacturing | Mouser.
It has higher inductance and a bit of resistance that actually may help to damp it. It is cheaper and lighter, and good for 300mA.
I am using 159ZJ in similar application as per advise from John Swenson.
That could be '159ZA 300mH 1A 6.0ohm 500 2.50 C14H'. At the cost of mH's these go for low-resistance values, and high currents. This is needed if you do not have 'volts' to spare (so to say) or have a high current need. But if you do a new design, for low currents, you can select a transformer with a few volts more to spare, and use one with more mH's and a higher resistance, both will help make a better filter. I actualy like the higher resistance, for low current small signal circuits.
If you want to go economical this Panasonic ones are just fine :Panasonic Kondensatoren Serie TS-HA - hifituning24.de
Depends on the transformer.
A normal transformer has reasonable capacitive coupling between primary and secondary windings, which is a pleasant path for high frequencies.
The bigger the transformer, the higher the capacitance, the bigger the problem.
There are transformers with a static shield, which will help with this.
A normal transformer has reasonable capacitive coupling between primary and secondary windings, which is a pleasant path for high frequencies.
The bigger the transformer, the higher the capacitance, the bigger the problem.
There are transformers with a static shield, which will help with this.