I am an electronics hobbyist. I designed this tube AM transmitter circuit. I want to ask you, since it's my first designed circuit, if it will work, and if I can improve it.
I am using a PL500 for the big tube.
Here is the schematic:
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No, it will not work.
There are about five major issues, nevermind the absent part numbers and component values. There also isn't any modulation going on; if we are to assume the input (if that's what that is; several symbols are nontraditional here) is an audio signal, where is the RF coming from, and how is it being modulated? Or if RF, where does the envelope come from? In short, what makes this specifically an AM transmitter, and not just a linear amplifier?
Indeed, given some component values, this seems closer to an audio amp than RF.
Start with the basics:
As well as the directly relevant questions, the above also suggest directions to read up in: radio design and operation; circuit design; RF amplifier design; AC analysis; antenna theory; etc. Good luck and stay safe!
This PL500 is nice to look at but not a good choice for a start. It is designed for a power range of around 20-60 W and it is far from easy to let it run at only e.g. 10 mW.
Why not start with a simple FM valve radio using low voltage tubes like this:
And yes, while it's a receiver it also emits a very small amount of RF..