[SOLVED] Problems when trying to prototype RF circuits

[FvM]

There are different points to consider:
- suitable collector DC load, resistor versus inductor
- optimal bias point, intended output stage class (A/C)
- feasible power gain of a single transistor stage for a specific type

Regarding the "High Quality 200 mW FM transmitter link", you may or may not believe that's it's sourcing 200 mW from just 315 mW input power, although a considerable part of the input power is already consumed in the oscillator. But something like 50 or even 100 mW might be possible.

 

[Electrojosh86]

So that wouldn't boost the output power if this oscillator?

 

[Electrojosh86]

I just got multisim V12 and so far I am loving it! Thank you for telling me about that little gem of a program. The only thing I cannot figure out how to do is get the oscilloscope in it to work like you did. I redrew your schematic that you sent me an hooked it up to the scope like you did, though still not doing the same as yours. Still though, awesome program!

 

[E-design]

Under your interactive simulation settings, make sure that the initial time step is set small enough. I normally set it to 1/10th of 1/f where f is the highest frequency of interest.