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The programming cable is a straight forward affair, a simple TX/RX/GND type connection.
I use the CP2102 USB modules for such programming interfaces, (search eBay etc. for "CP2102"), and never have issues with Windows or Linux unlike the 'Prolific' types.
A simple 3 wire interface example can be found here :-
https://www.miklor.com/COM/UV_ProgrCable8900.php
The connector on the radio is a 3 pin type, GND - Ground is the middle connector and the other two are TX & RX data. (You may have to switch these around anyway....and it won't hurt anything. )
If it helps the schematics for such radios, (and their model variants), are available here :-
thank you very much Victor.made it for baofang, can see, it's basically the same thing.
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Alan Pilot Major contributor
Call Sign : 163-CT-220...MW7TTA Posts : 2122 Times Thanked : 52 Join date : 2019-11-19 QTH or Location : Anglesey North Wales Equipment Used : Yaesu FT-991A,,Yaesu FTDX-10,,Icom ic-7300,,Anytone AT-D878UV PLUS",,LINCOLN II+. Age : 149
Good info there Victor. Not in any rush to make one but found the CP 2102 on the bay for £2.90 posted and in the uk ??. https://www.ebay.co.uk/itm/203604196200?hash=item2f67c17b68:g:3J4AAOSwCdVhP6uk
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Victor CT Directors
Call Sign : 26-CT-3228 / M7VIC Posts : 4475 Times Thanked : 284 Join date : 2019-11-10 QTH or Location : Bedford Equipment Used : Various
Always handy to have a few laying around, (well I do), for just such things. The nice thing is you know what you're getting unlike some unbranded 'usb/serial' cable so you won't face all the 'Prolific' nonsense.
Windows won't always recognise them, (none of my Windows version including 10 will?!!), but the drivers are simply available from Silicon Labs :-