circuit uses 4 vacuum tubes and has 2 frequency ranges;109-225
metres and 500-1000 metres.Changing of ranges is achieved by pulling out a knob on the
front panel,which in turn moves a system of rods and levers inside the set,controlling the
appropriate coils.There is an old world charm to this system of levers,which has the
appearance, of having been designed by a steam engine company.
The receiver was specifically designed for Direction Finding purposes and in addition to the main tuning control,has a Frame Aerial tuning facility on the front panel.Other front panel controls include a Gain control and Reaction.There is a front panel jack for headphone use.Power requirements are 2volts for the tube heaters and around 120-150 volts DC for HT (B+).The receiver is housed in it's original wooden cabinet,which has brass fittings and incorporates a pull-down front panel to protect the set from damage when not in use.The condition of the receiver is average to good,it retains all it's original controls and is in working order.The price is $735 US Dollars which includes the cost of air freight to the USA.
BRITISH AIR MINISTRY SPECIAL PURPOSE RECEIVER This most unusual receiver clearly dates from around the time of World War Two.Despite a considerable amount of research,we have been unable to identify either the set,or the purpose for which it was used.The
receiver uses a
total of 6 vacuum tubes and was designed for battery operation.The original leads with
engraved plugs, come from the back of the set and are as follows:LT +ve and LT
–ve,HT(B+) +ve,HT(B+) –ve,Grid Bias 0,-1.5,-3,-4.5 and –6volts.The receiver
may well have originally been in a wooden box,but if so, this is long gone!For some
umnknown reason,the lamp holder at the top left hand corner,has been disconnected.There is
provision by way of the chrome plated fitting on the top right hand corner of the front
panel, for what appears to a rod antenna (although this is not with the set) and there is
a jack for headphones.The central knob switches between high and low ranges and there
appear to be 3 channels, controlled by toggle switches.Best educated guess so far,is that
the receiver was probably used for monitoring beacons,but as yet,no-one knows for
sure.What we do know for sure,is that so far,no-one has ever seen another set like it.The
receiver is complete,but untested.This is exactly the sort of item which makes a very good
talking point in any collection.The price is $230 US Dollars,which includes the cost of
air freight to the USA.