We're halfway there! This radio is on top of the pistons facing the button.
How do I grab it?
Use momentum to reach the platform with the cube dispenser, then peek over the edge.
It's a bit tricky, but you can move forward while falling to try and land on the edge of the panels - and then walk along the pistons to reach the radio.
Where do I take it?
The light will turn green when the radio's against the wall behind the button.
Guide help
This is the low-spoiler guide for "Transmission Received (Radio 13/26)" puzzle in Portal. Unlike in normal walkthrough, you get gradual hints on how to solve the puzzle. Click the big button below to see your first hint. If the hint contains a spoiler, you will be warned about it before clicking.
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