I created the following circuits.
I tested the one on the left using 100K for R1, 2.2nF for C1, and 390nH for L1. I attached it to the antenna connection point of a basic NPN FM transmitter found on the net. The signal is stronger but it sounds more distorted when I'm close, but maybe that's a normal thing? or is 100K too low? or should I use the other circuit instead?
The reason why I chose the values for R1 and C1 is to pass audio. I treat the pair as a low-pass filter that rejects anything below about 700hz.
Is my setup ok? or should I connect the other end of R1 to NPN's collector instead of VCC?
and VCC is +5VDC regulated.
I tested the one on the left using 100K for R1, 2.2nF for C1, and 390nH for L1. I attached it to the antenna connection point of a basic NPN FM transmitter found on the net. The signal is stronger but it sounds more distorted when I'm close, but maybe that's a normal thing? or is 100K too low? or should I use the other circuit instead?
The reason why I chose the values for R1 and C1 is to pass audio. I treat the pair as a low-pass filter that rejects anything below about 700hz.
Is my setup ok? or should I connect the other end of R1 to NPN's collector instead of VCC?
and VCC is +5VDC regulated.