1916 Seddig Würzburg RJW Triode It is
difficult to find data as it is all hand made.
1916 Marconi (UK) V24 Triode One of the first
Click Here to see advertisement.
1920 RCA UV199 Triode The first from RCA to be
machine manufactured. From circa 1918 and very
used. May have less used samples in boxes.
1920 Western Electric 215A Triode This base was
hardly used by 1920. (TS) Did
not retain itself, because the spring pressure
contact was often bad.
1920 Telefunken RE16 Triode Fabricated in
Würzburg. Anode and Grid are copper. Tube
data not available.
1921 Basler Glühlampen Fabrik Triode
Very Rare! 50 were hand made in a back house off
the "good road". This tube has been returned
home to Basel Switzerland! (TS)
1921 Huth Gmbh RE50 Triode Huth GmbH
manufactured several types with ball glass
bulbs. See also the issued tube documentation.
The engineers from Kühn and Huth GmbH
invented the oscillator which had the circuits
named after them. (TS)
1922 Telefunken RE11 Triode das hat der
Röhren Sammler gern: Exact manufacture date
on side of socket.
1922 Standard Telephone Co. (UK)205D Triode
This Triode was made without getter. It is very
easy to see the internal structure.
1922 Marconi Osram R Triode. Manufactured
from yellow glass.
1923 Philips D2 Triode Considering that
they evacuate the tube through the pip on top,
tubes without getter are made, so-called "soft
1921 Telefunken RE71 Triode Unable to
discover any exact data.
1923 Philips D6 "dual grid" Triode This
tube has 2 grids: Connection on the socket site.
These two grid tubes benefit from lower anode
1923 Philips E Triode Tennis ball style
tube with a lot of getter substance. It was
bought for it's appearance. (TS)
1923 Mazda (France) TM15 Triode Mazda began
making the anode black in order to improve heat
1924 Radio-Micro (France) GDER (Groupment
pour le Development des Emissions
1924 Telefunken RE154 Triode
1924 Philips S??M Triode First Triode with
connections on top. (TS)
Particularly well suited for the reception of
ultra short wave. Authors note: This is due
in part to decreased inter electrode
1925 Radio-Micro ZMY Triode The serrated
bakelite socket is typical of French tube
1926 Telefunken RE062 Triode Very little