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Reception Set UHF Special MKII
(UK)
Reception Set UHF Special was an
early VHF/UHF receiver
covering 27 - 130 MHz in 5 ranges, which was used by the British Army
as a
ground or vehicle based interception receiver from about 1941 to about
1944.
The receiver was a conventional single conversion superhet with an IF
of 5
MHz, and uses 95x series acorn valves in the RF section and standard
octal
based valves in the IF, AF and PSU sections. The construction is
of
two separate chassis (one for the RF and one for the IF/AF/PSU), which
are
bolted into a heavy steel frame cabinet, which has separate top and
bottom lids.
The equipment was finished in green wrinkle paint to the cabinet and
gloss
green to the front panel (colour shade estimated as Brooklands Green).
The equipment was designed and produced by Radio Acoustical Products
Ltd,
who also designed the DST1000 receiver. The DST1000 has a similar
construction to the UHF Special MKII.
The UHF Special receiver appears to have been replaced by the R308
receiver later in the war.
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This equipment carries
serial
number 78, and is complete but is un-tested. At some stage in the
past it appears to have been serviced with components dated 1948 and
1950.
The condition is good, with no significant damage and no modifications.
Several
wires and solder joints require attention before the equipment can be
tested.
The equipment design uses close-fitting (conformal) 2-piece valve
screens which are pressed to the exact shape of the envelopes of the
octal valves used. See photograph below. |
The equipment was
donated to DRS by member Mr.
D. Delanoy.
First stage conservation work of dust removal and cleaning with water
has
been applied.
The paint finish to the cabinet has been stabilised by a light
application
of oil & solvent mixture.
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