Yesterday, 03:13 PM
Well, this cap you showed cannot possibly, due to the way it is constructed, be 1000pF (0.001).
It can be in tens of pF.
Now the purpose of it really depends.
One schematic shows it in series with the resistor. That could be a snubber, that protects the primary from high frequency transients with the capacitor allowing them to go to the resistor and be dissipated as heat. This stabilizes the stage and reduces voltage spikes.
Another schematic, also in our library, will show just the capacitor. I think it also acts as a High frequency filter and stabilizes the output, preventing some unwanted oscillations, or spikes; the parasitic of the transformer may act instead of that resistor.
It also depends on the frequency range, as the equivalent circuit of the audiotransformer is very frequency-dependent.
It can be in tens of pF.
Now the purpose of it really depends.
One schematic shows it in series with the resistor. That could be a snubber, that protects the primary from high frequency transients with the capacitor allowing them to go to the resistor and be dissipated as heat. This stabilizes the stage and reduces voltage spikes.
Another schematic, also in our library, will show just the capacitor. I think it also acts as a High frequency filter and stabilizes the output, preventing some unwanted oscillations, or spikes; the parasitic of the transformer may act instead of that resistor.
It also depends on the frequency range, as the equivalent circuit of the audiotransformer is very frequency-dependent.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
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