RT-34/APS-13 Tail Warning
The RT-34/APS-13 is a low power UHF
radar transmitter/receiver which was used in Allied aeroplanes such as
P51 Mustang and also the P-38L,
P-47D, P-61, P-63, P-82D in
the later stages of the war.
The equipment operates at 420 MHz with a receiver IF of 30 MHz and is
by an internal rotary generator which is supplied from the aircraft 27V
electro-mechanical construction is all aluminium, and the equipment
all miniature glass valves except for the voltage stabiliser which is a
(0C3). The PA is two 6J6s.
Three modified APS-13
were employed as the primary radar altimeter fuse in the ‘LittleBoy’
atomic bomb dropped on the
Japanese city of Hiroshima.
APS-13 equipment, serial number 13711:CRV, was manufactured by RCA, Camden,
New Jersey, USA under a contract number 458-DAY-44 (1944).
This equipment example is in
condition and appears to be complete mechanically and electrically and
is in working order.
been cleaned and repaired and is now functioning, although the pilots
cockpit warning unit is not held in the DRS collection.