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Receiver R1116A from Swordfish
Aircraft
(UK)
The R1116A general purpose aeroplane
receiver dates
from the late 1930s and early 1940s and was used with the companion
T1115 transmitter,
fitted to the Fairy Swordfish aircraft.
The R1116A receiver is a double-superhet with a very comprehensive
frequency
range for its time, covering 142 to 1600 kc/s and 2 Mc/s to 20 Mc/s,
and
providing direction finding facilities in addition to the usual RT and
CW
communication.
It is an 8 valve receiver designed to operate from battery supplies of
2
volts, 10.5 volts and 120 volts.
The electro-mechanical construction is all aluminium, and the equipment
is
notable for using permeability tuning (as opposed to variable capacity
tuning).
It is believed that this equipment type may have also been fitted to
some
British Sunderland Flying boats.
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Front
view of the R1116A receiver showing the condition of the panel as
received,
without control knobs, but after a light clean.
There
is some corrosion of the front panel, chassis and wrapper, and
heavy
corrosion to the frequency dials.
This equipment example appears to be complete electrically, and almost
complete
mechanically, except for the bottom cover and the DF aerial socket.
However,
some small differences have been noted between this equipment and the
official
technical publication AP1186 Vol. 1 Section 3, Chapter 8.
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The
restoration process will include general cleaning, removal
of corrosion, stripping
and respraying the front panel and wrapper, and re-lettering the front
panel
engraving, etc.
A thin aluminium panel engraved with the frequency range information
which
supports the two frequency dial cursors is in poor condition, and may
have
to be re-manufactured and re-engraved.
It is hoped that with time and using parts from other chassis, this
equipment will be restored and returned to
working
order.
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The
R1116A receiver chassis with its wrapper and top cover removed, showing
the all-enclosing
aluminium valve screens and the cardboard covered 10.5 volt grid-bias
battery . The control knobs are fixed in the correct positions in
these two photographs.
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Top
side and underside views of the R1116A receiver showing the chassis
with the valves and plug-in
IF modules removed, and the underside wiring.
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