0
\$\begingroup\$

My question is which is better for transmitting an audio signal on the common 88 - 108 fm band: the common 2n3904 NPN transistor or the PN2222A NPN or are they interchangeable. I have seen a lot of circuits and some have one and some have the other.

[EDIT]

I realized my question was not clear. For the time being I would be fine if you could tell me which of these transistors would be best for this circuit. I know the 2N3904 is used but would the other one be better or could they be interchanged?

Image from http://i1.wp.com/cdn.makezine.com/uploads/2013/10/kogawa_simplest_transmitter.png

from 1.wp.com/cdn.makezine.com/uploads/2013/10/kogawa_simplest_transmitter.png

\$\endgroup\$
  • \$\begingroup\$ They're reasonably interchangeable but both are rather underpowered for this application. There's nothing in this question that can't be answered by consulting the datasheets. \$\endgroup\$ – user207421 Apr 3 '15 at 0:56
3
\$\begingroup\$

This can't be answered because you haven't provided a schematic and said what function exactly the transistor in question is supposed to perform. Either of those transistors could be appropriate for some functions in a FM transmitter.

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.