With swinging coil antenna coupling. In oak cabinet and
ebonite control panel with a number of connections, two
plug-in tuning coil holders
and a tuning capacitor with Bakelite knob and silver
plated metal scale. Can be used to increase the
selectivity of a receiver.
The tuning condenser is by Nutmeg, Velthuisen represented
this company in The Netherlands. The device could also
be used as a refection filter (wave trap).
The studio of transmitting station P.C.K.K.
operated by Velthuisen, in 1923
Ch. Velthuisen was
founded in 1891. In 1918 Velthuisen used a transmitter
on 1050 meters with the station call P.C.K.K. In 1922 the first radio receivers were
sold. The company in Oude Molstraat 18 in The Hague, made
radio equipment until 1927. In that year
it advertised for Nova receivers. The shop remained active until the
Two pictures showing the interior of
the separating filter