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12:53 PM
Vio, the AC source is also DC ground referenced, so not having a series Cwould upset the base DC average DC voltage.
 
 
2 hours later…
2:51 PM
@VioAriton Notice that the DC bias of of the input is different from the DC bias of the base. AC coupling allows for an input DC bias that's independent if the base DC bias.
 
 
4 hours later…
7:17 PM
Is there a wire twister like this except for small wires: amazon.com/Twisting-Aircraft-Automatic-Twister-Industry/dp/…
 

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