Another design in the 'Deco' style, with banding and
contrasting inlay, trying hard to disguise the plain box of the cabinet.
"With the advent of universal valves, a new era
opens for many thousands whose electric supply mains are DC but may be changed
to AC in the future.
In the Aerodyne 'Curlew' full advantage has been taken
of these new valve features and of the latest developments in circuit research,
resulting in a receiver of outstanding merit. The sensitivity is as good as any
superheterodyne and the selectivity is ample. The output on either AC or DC is
more than sufficient for most needs, and the quality of reproduction is up to
the usual high standards set by Aerodyne."
= a tuning system using several loosely-coupled tuning
coils, intended to minimise the losses due to more basic designs. In practice,
however, the advantages of the band-pass system are more theoretical than
actual, as the bandwidth of the average receiver had to be kept down to 9khz or
Energised moving coil speaker = these loudspeakers were energised from
the mains via a field winding. Current through this winding created the
necessary magnetic field, unlike the permanent magnet type.
"REAL QUALITY FROM THE MAINS"
"The aerodyne 'Drake' takes the place of last
year's tremendously popular 'Swan' and embodies all the improvements in circuit
and valve research which have arisen during the past twelve months.
These improvements result in greater sensitivity,
greater selectivity, and better reproduction. What this means will only be
really apparent to those who knew the 'swan' and to those denied this privilege
we say with conviction that it has no equal.
You will enjoy as you have never done before your radio
with the new aerodyne receiver, which has been built with meticulous care to
operate satisfactorily under the altered conditions arising from the Lucerne
= A screen grid or pentode valve in which the control grid
has a special construction with differential spacing of the turns of the grid
wire. In practice, varying the bias on such a valve allows control of gain. This
was commonly used as volume control is TRF sets such as this, but the vari-mu
valve came into its own when used in the superheterodyne type, where its easily
variable gain could be adapted to automatic volume control purposes.
Illuminated wavelength scale
= note that no station names are given.
As stations at the time had a tendency to be shifted about in order to comply
with the latest 'plan', Aerodyne obviously felt this tend would continue and
that 'named' scales would rapidly become obsolete. In fact, the Lucerne plan of
1934 was the last major change for many years.
AC mains only = this set had a transformer to supply power to its
rectifier valve. Transformers only work with alternating current - AC.