Re: Mains powered very low power transmitter - need help please

Thank you again Mr. Woodgate for responding,
I'd like to split my question to 2 parts:
First, I'm really interested to understand how those devices are made,
just for my information and knowledge.
Secondly - what I really need is a wireless babysitter, and cheap
one...
I've Mentioned this frequency because it's receptable on a domestic
receiver, and the range may be up to 100m. As I have some experience in
electronics, (well, being supervisor for the last 27y of an electronic
lab - not RF - and now retired) I'd like to build such devices. I can
make some changes to the receiver to work at higher frequency, let say
110 - 115 MHz...no problem. The problem is that the devices I've build
so far (as mentioned in my first post) are very unstable, noisy (can
hear the 50Hz ripple louder than the picked sounds). I'm aware that
there will be no chance to get a licence, and about the fire danger -
at the place it's been intended to be placed there is no chance, as
it's a concrete 3m high wall - far away from any dangerous flamable
material
TIA for further help :)
Regards,
Nina

.

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