Campagnolo Khamsin asymmetric wheels, done around 200 miles, fitted with an 11 speed SRAM rival cassette.

When I ride, I get a 'tick tick tick' sound every revolution. Sometimes the frequency increases, but mainly stays at 1 tick per revolution. It's definitely coming from the rear wheel, I took the wheel off and fitted it to a friends bike and the noise was the same.

Current fault diagnosis has been:
Check tyre for damage or signs of noise inducing debris - nope.
Valve stem, attached a nut - Noise still apparent.
Possible spoke crossing/touching - negative, spokes not touching.
Removed skewer - noise still apparent.
Fitted to another bike - noise still apparent.

Anyone got any ideas?

I haven't taken the tyre and tube off yet to check for debris. However, whichever way I ride, in or out of the saddle, freewheeling or pedalling, the sound remains.

It almost sounds like when you have a stone in your car tyre.

If it's a bearing then I'll just return the wheel. Far too early for that to be going.

Thanks for any help in advance.