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Actually, I like to use any substitute for the DC power supply which is currently available in the Indian market. This choke coil is now unavailable in India. Desperately I need a substitute as well. Please help me.
Why do you want a substitute?
Output Voltage = 12vThis is an open ended question. Seriously open ended.
At a minimum, you need to specify the output voltage and current. Also, how much ripple you will tolerate. Finally, how much you are willing to spend.
Right now, I have to discard my power supply module for DC filtration and stick to the capacitor for filtration purpose. Always my required voltage is 12 for my LA4440 audio amplifier and 5v is for Bluetooth mp3 FM module as well.I don't know what you are doing, and neither do you. But the cheapest and easiest thing to do is get a normal 240v: to 15v or 30v power transformer and use just the secondary. Compare the ripple and let me know. In other words, listen to the hum.
Compare the output voltages too.