TELEVISION CRT TUBE PHILIPS A61-120W
QUICK REFERENCE DATA
61 cm (24in)direct viewing television tube with metal backed screen
and reinforced envelope. A separate safety screen is not required.
Suitable for use in receivers with push—through presentation. This
tube is fitted with a ring trap base.
Deflection angle 110 deg
Light transmission (approx.) 42 %
Maximum overall length 370 mm
This data should be read in conjunction with GENERAL OPERATIONAL
RECOMMENDATIONS — TELEVISION PICTURE TUBES
Suitable for series or parallel operation
Vh ’ 6.3 V
Ih 300 mA
The limits of heater voltage and current are contained in ‘General Operational
Recommendations — Television Picture Tubes.
Note - applies to series operation only
The surge heater voltage must not exceed 9.5V r.m.s. when the supply is
switched on. A current limiting device may be necessary in the circuit. to
ensure that this voltage is not exceeded.
OPERA TING CONDITIONS
Va2+a4 _ 20 20 kV
Vag (focus electrode control range) 0 to 400 0 to 400 V
V 400 500 V
Vg for visual extinction of focused raster -40 to -77 -50 to -93 V
*Vk for visual extinction of focused raster 36 to 66 45 to 80 V
*For cathode modulation, all voltages are measured with respect to the
SCREEN (metal backed)
Fluorescent colour White
Light transmission (approx.) 42 %
The range of focus voltage shown in !Operating Conditions’ results in opti-
mum overall focus at a beam current at 250pA.
Diagonal deflection angle 110 deg
Horizontal deflection angle 98 deg
Vertical deflection angle 81 deg
The deflection coils should be designed to provide a pull—back of 4 .0mm on
a nominal tube .
cg_au 7.0 pF
ck_an 5.0 pF
°a2+a4-M 1500 to 2300 pF-(-
°a2+a4—B 600 PF
EXTERNAL CONDUCTIVE COATING
This tube has an external conductive coating, M, and in accordance with
the General Operating Recommendations this should be connected directly
to pin 5 and not to chassis. The electrical connection to this coating must
be made within the area specified on the tube outline drawing. The capaci-
tance of this coating to the final anode is used to provide smoothing for the
For flashover protection of the receiver, parallel spark gaps are included
for all the electrodes in the base of this tube, and the common connection
is made to pin 5. These spark gaps are intended as part of a system for
full flashover protection. A direct connection must always be made from
pin 5 to chassis, and the external conductive coating returned to chassis
only via pin 5, using short leads. Any electrode supplied directly from a
high energy source (such as the h.t. line) should be provided with a series
See note under this heading in ‘General Operational Recommendations —
Television Picture Tubes‘.
Centring magnet field intensity . 0 to 800 A/ In
Maximum distance of centre of
Vcentring field from reference line 57 mm
Adjustment of the centring magnet should not be such that a general reduc-
tion in the brightness of the raster occurs .
REFERENCE LINE GAUGE
J .E.D.E.C. 126. For details see ‘General Operational Recommendations-
Television Picture Tubes‘ .
Any. The tube socket should not be rigidly mounted’ but should have ﬂex-
ible leads and be-allowed to move freely. The bottom circumference of the
base shell will fallwithin a circle of: 40mm diameter which is centred on
the perpendicular from the centre of the face.
This tube is fitted with a pin protector in order to avoid damage to the
glass base due to bending of the base pins whilst handlingthe tube.
It is advisable to keep this pin protector on the base until it can be replaced
by the socket after installation of the tube in any equipment’.
RATINGS (DESIGN CENTRE SYSTEM)
Va2+a4 max. (at la2+a4 =0) (see note 1) 20 kV I
Va2+a4 min. 13 kV
+V max. 1.0 kV
-V max. 500 V
V’ max. 700 V
V min. 350 V
—vg(pk)b max. (see note 2) 400 V
-Vg max. (see note 3) 150 V
tIa3 max. 25’ pA
tlal max. 5 uA
Vh_k (see note 4)
d.c. max. 250 l V
pk max . 300 V
d.c. max. 135 V
pk max. 180 V
Rh_k max. 1 .0 M9
Zk_e max. (f=50I-lz) 100 kn
R max. 1.5 M52
Zg_k max. (f= 50}hz) 500 k9
AT ancient times VALVO was an components office of PHILIPS then the converted to the above company was started and the previous closed.Valvo Bauelemente GmbH is a Germany based company, specializing in the delevopment, manufacture and marketing of ferrite components for microwave and rf applications. Initially part of the Philips Components group this business has 30 years experience in the design and production of standard and special ferrite devices.When Philips closed its activity located in Hamburg, Valvo Bauelemente GmbH continues this circulator and isolator business and started 1999 as an independent company, only 100 meters off the former Philips location.
The company's history began in 1924 - a year after the introduction of broadcasting in Germany - with the establishment of a radio ray tube factory by the Hamburg company CHF Müller. Benedictines built many companies that produced radio tubes and the brand "Valvo" one of the few that are pervasive in the long run. 1927 joined CHF Müller and radio tube factory with Philips companies, and the tube manufacturing was relocated to a suitable site in Hamburg-Lokstedt. Already in the 30s advanced to the manufacturing program to electrolytic capacitors, speakers, and special tubes Hochohmwiderstände.
rehensive Valvo organization began after the war. In Hamburg-Lokstedt bigger and modern factory buildings for the manufacture of electron tubes were built in Hamburg-Stellingen began with the manufacture of ceramic capacitors, which was then developed into a long horn on, and in Herborn founded Philips is later taken over by Valvo work for Electrolyte and plastic film capacitors.
Valvo 1951, the production of ceramic magnetic components. The set up for this new manufacturing plant in Hamburg was already the largest of its kind in Germany. With the broadcast of the first experimental television broadcasts Began in 1951, the manufacture of television picture tubes. From these first attempts gave rise to the Bildröhrenfabrik Aachen, which is now the largest color picture tube plant in Europe. 1953 with the introduction of semiconductor technology in Hamburg-Lokstedt a key step in a new era has been done. From the radio tube factory, the tubes and semiconductor plants.
The sales departments have since 1955, a private office building in Hamburg, Valvo-house. They are supported by six branch offices in the care of professional clients. In addition, sales contracts are entered into with 13 distributors.
To Valvo organization in which more than 8000 employees, which are now the four works: the tubes and semiconductor plants in Hamburg, the Hamburg factory for electronic components, the Bildröhrenfabrik Aachen and the capacitors work Herborn. These large manufacturing plants pose a significant production potential; its importance is enhanced by cooperation with 120 components factories in 30 countries as part of the Philips company, including the Valvo GmbH is a subsidiary of the General Association of German Industry Philips (Alldephi).
Valvo has done in its 50-year history many contributions to the development of electronic engineering in Germany. In the radio tube factory in Hamburg, including the first Acid-tubes, the first German multigrid tubes as well as the first tube types for ac heater was manufactured in series. In the picture tube technique with the rectangular tube in standardized aspect ratio, of the 110 ° deflection and the picture tube, which can be operated without additional protective glazing, remarkable improvements have been introduced. Today, the partnership offered by Valvo "European television technology", under which one understands the euro color picture tubes and Ablenktechnik with strand wound saddle coils enforced. The latest development is the picture tube with Schnellheizkatoden. From the large number of special tube developments here only Hochleistungsklystron should be mentioned that works in many of the UHF television channels at home and abroad.
Also for semiconductors Valvo could play a key role early on. For example, in 1954, brought out types OC 70, OC 71 were first available in large quantities alloyed junction transistors on the German market, and the diffusionslegierten POB transistors (pushed out base) extended from 1959 the scope of the transistor in the FM area. A striking example of the successes of modern semiconductor technology, the close tolerance varicap BB 105, with which the automatic tuning for FM and TV reception could be solved economically justifiable.
1967 originated in Hamburg analog integrated circuits. They were among the first of such products manufactured in Europe. Today Valvo has a leading position in the field of integrated circuits for color televisions. The second generation of these circuits is already matured. It contributes significantly to the reduction of the number of individual components and the necessary adjustment processes. Also numerous radio receiver as part of a progressive circuit design, advanced integrated circuits are available.
On the development of soft and hard magnetic oxide ceramic materials has been working steadily in recent decades, for example, would be the 110 °-Ablenktechnik without the high magnetic quality and dimensional accuracy of modern yoke rings from "Ferroxcube 3C2" not have been possible. For line transformers and modern power transformer, the new material "Ferroxcube 3C8" was introduced, and in the area of hard magnetic materials are "ferroxdure 380", "ferroxdure 260" and "ferroxdure 270" available.
On this basis, the broad technical Valvo GmbH presents its 50th anniversary as one of the leading suppliers of electronic equipment industry with a large production capacity and with the most modern technical equipment - a solid foundation for the further development of the position it has reached today.