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In the Forum: Melquiades Amplifier
In the Thread: 6 Channel Version of Super Melquiades
Post Subject: The PS for the single-stage amps: trying to disregard ripples.Posted by Romy the Cat on: 12/24/2007

Trying to take full advent age of DSE and contusing the thoughts that I developed in the flowing thread:

http://www.romythecat.com/Forums/ShowPost.aspx?postID=4328

http://www.romythecat.com/Forums/ShowPost.aspx?postID=4743

I would like to try making this PS for single-stage amps with absolutely minimal capacitance. It will be very interning experiment something that was planning for a very long time.  Let presume that no switching pulses Silicon Carbide Schottky Diodes are free from any problems and will produce right sound (that would make me do not try the damping diodes) then what we have left – the filters. The first LC chain is not filtrating chain but rather filter entering chain (set right Q + current stabilization). It will very-very slightly reduce the ripples but very slightly. The ripple killing is done with the second RC chain where the last cap is usually is very large in my supplies.

Now we have a DSET where the single-stage amps have just 2.8W and care just MF and HF. This opens a very interning opportunity. I have been saying for a while, perhaps incorrectly, those ripples have no affect to sound. Sure they affect noise but if the noise is not auditable then ripples are not important. So, it will be fun: 120Hz ripples against the HF single-stage 2.8W, 35 times gain amps, 109dB sensitivity. I am going to tell you honestly I will not even planning to measure ripples and juts will be listening the noise from the speakers (I will not use my compression drivers but a full range speakers to hear the LF wobbling to assure the absents of Doppler problem in my compression drivers)

So, I ma planning to find the absolute minimal values of the last capacitance necessary for my application. I hope that I will be able to go away with LCRC were the fist cap will be a couple dozen uF and the last cap will be a few dozen uF. I will be reporting the results.

The Cat

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