Nothing you've written there suggests any way it's legal - and while I've no idea what the regulations are in the Ukraine it seems VERY unlikely it would allow high power unlicensed radio transmissions.OK. My actions will be legal. I'm looking for any transistors with a maximum frequency of 500 MHz. For the 433 MHz radio transmitter. No FM. But FM may be compatible. Legal
I do not intend to play the expert by any means, here, but if I understood it right, the power of any transmitter, unless specifically defined in a different way, is defined as the power applied to the final output stage. Am I to much off track?Or, we can assume the OP knows what he is doing and, like the OP said, 20W circuit doesn't mean 20W of transmitted energy.
You've not built it properly then - 1W at 27MHz should easily go a number of miles - presuming you're outside?, obviously if you're inside walls and obstructions will restrict range. In fact, under the right conditions, 1W at 27MHz will easily cross the Atlantic ocean.I have already assembled such 1 W transmitters. They work no further than 20-100 meters.