The  T1509 transmitter appears to date from the mid to late 1940s, and has much in common with the Army's WS53, and the commercial ET-4336, all widely used in long-range HF links in many places.  It has a pair of 813 valves in the PA, anode and screen modulated by another pair of 813s. The set is a real monster, weighing around 800lbs, but at the same time shows heavy valve engineering at its best.

The only associated equipment is the Control Unit 310, and the receiver type R1475.

No variants are known.

On the right is a T1509 belonging to a VMARS member.  Several are known to survive within the UK, and they can be occasionally heard on the air producing a very good AM signal.

Technical Data file

Full manuals

T1509 & CU310 information (4.2MB)

 AP2550B  Technical Manual (9.5MB)