[Alex Kitic]

Zitat:Original geschrieben von Rumgucker

Zitat:With all due respect, I have better things to do than teach people about RMS, peak values, and duty cycle.

Warum tust Du dann nicht die besseren Dinge? Mir scheint hier ein Missverständnis vorzuliegen.



Ohne Siebkondensator: 230V RMS, 320V Peak



Mit Siebkondensator: 320V RMS, 320V Peak

Was ist daran nun Deiner Meinung nach falsch?

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You are correct about this, except for the fact that RMS is not going to be 320V. If you cap is 10.000uF (10mF), than maybe you can approach this RMS value, but it would be extremely expensive (10.000uF 400V ?!) and the current surge would be huge to start that circuit.


Furthermore the load should not be regarded as a resistor but a current sink, because otherwise the RMS current across the load is increased.

I intended to show similar screenshots but from PSUD2, much more realistic values and more information available at a glance.

When simulating one needs to set realistic conditions (10.000uF 400V is surreal).

The current plays an important role here, which is why I am always keeping total load lower than what stated on the electronic transformer. I use a 160W unit for a load of probably 107W (2x 813 + 7.5V 1A for driver tubes, which I lower to 6.3V through a 1.33 ohm resistor). Suffice to say that what matters for the half-wave oscillator is current, and the transformation ratio of the ferrite core unit means that you should not exceed a given current on the BJTs: otherwise protection kicks in and you have no output.

Nevertheless, this is becoming a long theoretical debate instead of a constructive proposal. And if I devote my time to debating things that I already know, just to teach my incredulous interlocutors, than I have no time for design work and developing new ideas. It's as simple as that.

Which is why I keep a blog and post on forums very seldom, only to announce new projects...