a bit unusual linear voltage regulator

some months ago i tested the FM-mic circuit that made the most sense of the ones presented in www - actually i want to use it for data comm. but there's along way there

anyways (during the test) the fq. drifted down something like a half a MHz per second ???

there might be several reasons for that
- the Cu-coil acting as a spring (slowly - expanding??)
- the battery being too weak (i had no regulator in this test)
- the BJT heating up (loosing the h21e value)
- other ...

... starting from the supply i attached a simple/efficient regulator (not tested in practice yet - all simulation) ::

 
[EOF]