AC and DC coexistence

221

04:36:09

An example of AC and DC current coexisting on the same wire but shouldn't the capacitor block the AC from passing but allow the AC to light the second bulb on the right?

published 6 years ago

prinzrainer

6 years ago

that node will always have 9v since it's connected to a source

wyoelk

6 years ago

Check this circuit. It shows the internal resistance of the ac supply. I THINK that is you answer. http://everycircuit.com/circuit/6333256488976384

gorgut00

6 years ago

Hmm. In reguard to a tube amp it is my understanding that the DC b+ plate voltage and the AC guitar signal coexist on the same wire without the DC effecting the AC and then the DC voltage is blocked by a coupling capacitor. I was attempting to demonstrate that in as few parts as possible.

wyoelk

6 years ago

If you remove the 2nd cap, set the lamp voltage to 6-9 volts it works the way you want I think

gorgut00

6 years ago

Thanks for the reply. I tried that but as far as I can tell it is operating off of the 9v DC. I'm fairly certain this is how part of a tube amp operates but can't quite seem to get a basic version of that to work on every circuit

rich11292000

6 years ago

Unground one source and play with cap settings.

wyoelk

6 years ago

Good luck to ya. The rest is way beyond me. As they say fun while it lasted! LOL

thebugger

6 years ago

The first capacitor acts as a resistor to AC (presenting reactive capacitance). The DC source will sink all the AC current and won't pass any to the second capacitor.

kiani

6 years ago

Any ac voltage has, peak value, rms vslue and average value and dc equivalent value,, might that be relavant.!?

wyoelk

6 years ago

Thanks thebugger, is there also internal dc supply resistance?

gorgut00

6 years ago

Thanks for the help

gorgut00

6 years ago

Rich11292000 nailed it. Thanks!

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