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![[Learadio AMRL-1 marine radio direction finder, Learadio compass, Learadio T30 aircraft transmitter, Learadio R3 aircraft receiver, 1937-1938]](/img/placeholder.gif?1762303493 "[Learadio AMRL-1 marine radio direction finder, Learadio compass, Learadio T30 aircraft transmitter, Learadio R3 aircraft receiver, 1937-1938]")
Lear Developments, [Learadio AMRL-1 marine radio direction finder, Learadio compass, Learadio T30 aircraft transmitter, Learadio R3 aircraft receiver, 1937-1938], [2000-06-20_container_006]. Museum of Flight Digital Collections, accessed 08/02/2026, https://digitalcollections.museumofflight.org/nodes/view/4759