GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Melquiades Amplifier
In the Thread: To Milq builders: corrections, simplification, modifications.

Post Subject: A couple of answers.Posted by Romy the Cat on: 1/5/2015

**** For the 30h do you change r23 to like 42k? the arrow from r23 to l1 seems to imply that r23 depends on the choke. does this effect r2?

Yes, they are related. the R23 in the supply of the driver state is just a bleeder. If you drop R23 then more current will flow across the choke and you will sooner hit minimal inductance. If you do so then make sure that your coil at the power transformer is able to handle more current. Whatever you in there shall not affect R2, unless you go with super low current and super inductive choke with very high serial DCR that would sunk the voltage. The voltage adjustment i is not done by R2. It is loading resistor and keep it as it is.

*** what is your opinion of small value input cap? the schematic 4.4 has 100uf with choke input, is this small

Actually it is not small but if you would like to rise it then be my guest. You see, this is LCRC filter where the first cup is not for full filtration but for forming proper LC input, then you have a decoupler by a resistor and then the main filtration come to the play. The choke input configuration and the values are well described in technical literature, seek and you will find. Warn you that in input choke configuration choke is a critical element, the values of a cap to ground is semi-irrelevant of it followed with another filtration stage.

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