Model: Serviceman universel 752
Antique radios, Old Time Radios
Serviceman universel 752
Country:
France
Manufacturer/Brand:
Radio Controle; Lyon
Year: 1950 ??
Type:
Alle Arten von Geräten, die eine Radiowerkstatt im weitesten Sinne umfassen kann - sofern es der Hauptzweck des Apprates bzw. Modelles ist.Service- or Lab Equipment
Mod.-ID = 98595
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Schematics etc.: 1 (for
members)
Power type and voltage
AC set plus voltage range.
/ = 2 different voltages
- = voltage from-to
* = «Special»
Apparareil à courant alternatif. Tensions mentionnées.
/ = 2 Spannungswahlen
- = von-bis
* = Fabrikwahl/«Spezial»
Trafo ist nicht immer mit Primär- undSekundärwicklungen versehen. Dadurch kann das Chassis ein gefährlichesPotential führen.Alternating Current supply (AC) / 110-240 Volt
Loudspeaker/pwr.out
This set has no built-in loudspeaker. It requires a separate loudspeaker or headset - or the set has no speaker output (not a radio).
Cet appareil n`a pas d`haut-parleur.
Das Gerät verfügt nicht über einen eingebauten Lautsprecher - entweder weil er nicht nötig ist (Gerät hat keine Tonwiedergabe) oder weil er separat zu stellen ist - bzw. das Gerät ist für Kopfhörerbetrieb.- For headphones or amp.
from Radiomuseum.org
Model: Serviceman universel 752
Material
Metal case.
Caisse en métal.
Gerät, dessen Gehäuse aus Metall gefertigt ist. Es kann sich um verschiedenartige Metalle und Oberflächenbearbeitungen handeln. Ist es hingegen nur ein Chassis, so erhält das Gerät eine andere Bezeichnung.Metal case
Shape
Rack
Dimensions (WHD)
480 x 970 x 250 mm / 18.9 x 38.2 x 9.8 inch
This model was suggested by Albert Walenta.
The tube tester is the lower unit. The box above maked LAMPES is used for starage of the adapters (pins are visible) and spare tubes. The empty space below may be used to place the radio set (not shown) under test to insure short connections.
More pictures
More information on
Serviceman universel 752 (Radio Controle; Lyon)
Hallo, habe ein mir unbekanntes Röhrenprüfgerät erhalten
Habe jetzt gesehen es ist die Serviceman type 752 Lyon
Hat jemand die Gebrauchsanweisung oder etwas fur mich??
Ich habe nur das Apparat,weiter nichts
Bin mit alles zufrieden
Danke
Radiopiet
Nederland
p.scheepers9@chello.nl
More...
A.H. Walenta, 57076 Siegen, Germany
Text prepared for radiomuseum.org
LAMPMÈTRE SERVICEMAN UNIVERSEL
RADIO-CONTRÔLE-Lyon 6è
Modèle 752
Overview
The evaluating of the quality of a tube is based on an AC measurement of the cathode emission current as is found in many low budget tube testers. The method usually does not allow to measure the transconductance, amplification factor or plate impedance but it is reliable to determine if a tube is good, weak or severely damaged. In this practical respect, the SERVICEMAN UNIVERSEL can be considered to be exceptionally well designed since it exhibits a number of unusual features making the apparatus particularly adapted for repair work. These features are (see schematics):
a) fine adjustment of line voltage
b) precision setting of heater voltage with three selectors in steps of 0.1 V, 1.0 V and 10.0 V.
c) 9 individual selectors SE1 to SE9 for each socket contact to be connected to one of the 5 test voltages:
• ground (it should be noticed that this “ground” is floating and not connected to the case which makes it useful for external oscilloscope measurements (see below),
• F1: heater. In the “measurement position this is connected to “ground”
• F2: heater voltage
• T: test voltage for tube electrodes (163 V AC). Limited to max. current by resistor.
• TD: test voltage (42 V AC) for diodes. Limited to max. current by resistor.
d) each socket contact can be interrupted by a toggle switch SC1 to SC9. Two banana plugs are connected to the ends of the switch which allows to insert a current meter in the open position or to measure the voltage with an external device. This feature is very simple but enormously useful for really finding the problems of a tube.
e) A lamp array for finding the shorted electrodes. Low voltage lamps (6.3 V, 0.1 A ) are connected in series with a resistor (2.5 kΩ) such that a current of 50 mA barely lets them glow. Any parallel resistor 30 mA) showing that the grid is working properly. Finally setting the grid on T will allow the judgement of the cathode emission in the categories bonne (good), douteuse (doubtful), mauvaise (bad).
c) Pentode and multi-grid tubes: anode on T , grids off. There should be almost no current ( 25 mA) showing that the tube basically is working properly. Setting now the grid on TD will reveal its functioning by increasing the current further. Finally setting the grid on T will allow the judgement of the cathode emission in the categories bonne (good), douteuse (doubtful), mauvaise (bad).
d) Vacuum: the banana plugs of the toggle switch for the grid are bridged with a resistor 1 M. With the grid on M shows a given current. Opening the toggle switch should not increase this current appreciably.
