The Carbon County news. [volume] (Red Lodge, Mont.) 1924-1931, 1926-02-04
Radio CORPORATION Tubes
BY r. M. SHERRILL
(Radio Engineer)

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Since the new type of tubes was
added to the Radio Corporation line
last fall, there has been more or less
confusion as to just what uses the
various types were suited.
In the first place, the UX prefix to
the tube numbers indicates that the
bases of the tubes are different from
those of the wv type. Tubes with the
UX bases are designated to be used in
special sockets into which the tubes
are pushed without any twisting mo-
tion. This scheme follows out the ar
rangement which has always been
used in the French and British sockets.
The U. x. bases are equipped with
side pin, however, SO that they may
also be used in the old type sockets
as we'll as in the new. The contact
pins are longer on the UX tubes than
on the wv tubes, and the filament pins
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and grid pins to prevent the tubes
from being Incorrectly inserted in the
Tx sockets.
The Tx 112 is a tube designed to
replace the Nv 201A in the last stage
of audio frequency amplifier. This
tube takes the same filament voltage
as the wv 201A although it takes
twice the current. It's purposes to
amplify signals which would be too
strong for the wv COLA to handle
without distortion. Its plate voltage
should be between 80 and 100 volts
and and the c battery should be of the
proper voltage to correspond with the
exact plate voltage used.
Ideal Applying Tube
The UX 120 is designed to amplify
signals which would be too strong
for the wv 1919 to handle without dis
tortion. 1t is the ideal tube to use in
the last stage of a wv 1919 amplifier.
The Tx 120 takes the same filament
voltage as the wv 1919 but its current
is greater. Plate potentials up to 1876
volts may be used if the proper C
battery is employed. This tube fits
into standard wv 1919 socket or in a
small sized Tx socket.
The Tx 210 is really watt power
tube, but may be used in place of the
Tx 112 where enormous power ampli-
fication is required. When used for
simplifying purposes, the Tx 210 may
be connected directly across 6 volt
battery without any rheostat, and
plate potentials up to 100 volts may
be used.
It must not be thought that just the
substitution of UX 112 or Tx 210
for the wv 201A, or the substitution
Of UX 120, for wv 1919 will neces-
sarily result in louder signals. These
tubes will ACTUALLY decrease the
strength Of the reception unless the
signals are SO strong as to cause dis
tortion in the corresponding wv tubes.
Also, it is necessary to use correct
c battery voltage and properly des-
ignated simplifying transformers
along with the UX tubes in order to
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LITIGATION of which they are capable.
The old type tubes-i. e. the wv
200, wv 210A, and WD 12-are also
made with the new bases and become
UX 200, Tx 201A and WX IL respec-
lively
Two tubes which are specially des-
ignated as rectifers for battery
eliminators are also included in the
Tx line. The Tx 213 is full wave
rectifer tube having two plates and
two filaments. This tube will stand
220 volts AC on each plate and will
give maximum DC output of 65 mil
liamperes. It's two flaments are con-
nected in parallel and together they
draw amperes at volts. The UX
216B is also rectifier tube, but with
single filament and plate. Its max
AC input is $50 volts and maximum
output is 65 milliamperes at rs volts.
RADIO QUESTIONS AND
ANSWERS
Mr.. Sherrell will be glad to help
you solve your radio problems. Write