Tube DIY Asylum

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RE: DC voltage drop across choke vs resistor!!!

Posted by Tre' on March 18, 2017 at 07:29:36:
"My confusion is that with everything in place with only only one power supply to one tube no other branches the current should be constant."

The amount of current the tube will draw depends on the bias condition of the tube.

If the tube has more voltage across it (plate to cathode) with the choke in place vs. the resistor in place then it will draw more current.

I'm not sure why you think the current should be constant.

Power supplies, unless they are current regulated supplies, supply whatever current the tube circuit demands.....not the other way around.

"I am guessing the DC circuit is seeing the choke as more than just its resistance. My question is why."

The DC will only see the resistance of the choke. The AC (music signal) will see the resistance of the choke and the reactance of the choke in series.

Tre'