开云体育

So I am considering updating some old capacitors in an existing power supply B+ on a driver valve 6c45 and B+ on an output valve 211 in a single ended power amplifier. The existing design uses CLCLC for 6c45 valve and CLCLCLC for the 211.?

I am considering changing both of these for CLC to simplify the potential resonances/ringing in the Power supply, based upon some advice from another DIY builder, and to make them a little more responsive.

I have had a number of conversations on DIY AUDIO and the question I wanted to post here is I hope quite simple, as I have a question related to PSUD2 in particular.

Apart from Voltage and ripple of the stabilised supply for a steady state design objective, how can the transient response or any other additional design objective be modelled, or simulated.

So far I have used the profile of the initial start up curve and put in a step change in a constant current load, and tried to make the response as rapid and oscillation free as possible?

Any guidance gratefully received.

You're doing the right thing by using the step change to model the transient behaviour.

If ringing at the transition point is a problem, I've found it helpful to make the first C of a CLC section a significantly lower value than the second C. This has the advantage of presenting a greater damping from the load on what effectively has become a tuned circuit.

The nice thing is you can try some values and check out the effect without having to assemble the components.

Regards,
Duncan

Thanks for the help so much.

So the question I am unsure of is what makes a good transient response compared to another, I sort of felt like the speed (tightness of the curve) to return to the steady state is desirable to be as rapid as possible; within the context of acceptable ripple and the lack of ringing / misshape of the profile curve or the output voltage. Is this correct and should I also look for ringing in other areas of the circuits?

This is the PS circuit I am trying to model, with approximately the design I am moving towards btw. The 6c45 takes voltage from halfway up the doubler of 2 x 5u4GB rectifiers, and I have struggled a bit to have confidence this is modelled correctly.