Increase a Walkie talkie wattage output?

Nigel Goodwin said:

I've not been active now for a good many years, and I only ever used VHF and UHF - but using short-wave you can get all round the world.

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All around the world, amazing!

Assuming you could learn morse code (I couldn't be bothered ) then you can build very simple and easy equipment that will allow you to communicate over vast distances.

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I think some simple morse code encoder-decoder software is easy way of alternative.

But for VHF/UHF you can buy VERY cheap but excellent gear, such as this:
https://www.banggood.com/Wholesale-...-Transceiver-Radio-Walkie-Talkie-p-61066.html

I actually bought one, even though I'm not active (it was too cheap to turn down) - but a friend borrowed it, and I've not seen it since

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It seems VERY interesting and REALLY advanced transceiver with amazing features, wow! If I could be there! A person needs at least two transceiver (US$ 60) and shipping charge to my part of the world cost approx US$ 50 ( according to digikey's rate ) so total US$ 110. I recently got a middle class government job and I need 20 whole days to get it (to earn the amount). It is not sounds cheap to me/to my cheapest part of the world. That is way I am far from American cheap parts and that's way I always see for DIY schematics.

Try getting a copy of the AARL Handbook. MUCHO information!
LOTS to learn in that book. There's free downloads available on the net.
I just got a copy of the 2010 edition. It's 5 years old, but not outdated by any means.