Model: Tube Tester 100



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Tube Tester 100
Country: United States of America (USA) Manufacturer/Brand: Hoyt Electrical Instrument Works; New Hampshire
Year: 1922 ? Type: Radio Repair EquipmentAlle Arten von Geräten, die eine Radiowerkstatt im weitesten Sinne umfassen kann - sofern es der Hauptzweck des Apprates bzw. Modelles ist. Mod.-ID = 77554 previous | Result List | next | New search for Radios etc. Schematics etc.: 0 (for members) Wave bands n.a.When collecting this field of data I had no information on the wave bands - or this set is not a receiver. Quand je faisait la collection je ne savais rien de ces dates des gammes d`ondes - ou bien l`apparaeil n`est pas un récepteur.
Beim Erfassen dieses Feldes waren mir die Wellenbereiche nicht bekannt - oder der Apparat ist kein Empfänger.
Power type and voltage Batteries (storage and/or dry)Battery supply. Alimentation de batterie
Batteriespeisung
Das Gerät erhält seine Betriebsspannungen von Akkumulatoren (Sekundärzellen) und/oder Batterien (Primärzellen).
Solche Geräte wurden auch mit sogenannten Netzanoden gespiesen, die zumindest die Anodenspannung lieferten, in manchen Fällen auch Gittervorspannungen und teilweise auch Heizspannungen.
www.radiomuseum.org Model: Tube Tester 100 Material Wooden caseWooden case. Most radios have a wooden cabinet until the WW2. Caisse en bois.
Die meisten Heim-Rundfunkempfänger führen von Beginn an bis etwa Ende 60er Jahre Holz als Gehäuse. Auch frühe Reiseempfänger zeigen Holz (speziell in den 20er Jahren) oder Holz mit Stoffüberzug etc.
Shape Tablemodel, with any shape - general.
Dimensions (WHD) 225 x 70 x 125 mm / 8.9 x 2.8 x 4.9 inch
Notes A, B and C battery binding posts allowing to test Types UV201, UV-201A (UV201A, 201A), C-301A (C301A, 01A), C-299 (C299), UV-199 (UV199, 99), WD-11 (WD11), WD-12 (WD12), C-301(C301, 301), DV-3 (DV3), WE, 216A and UV-200 (UV200) tubes. This device and the model 200 were often sold through the Burton-Rogers Company, which had a sales office in Boston, Mass.

Instructions for operating Hoyt Model 100 Tester:

A-6 volt "A"-Battery can be used for all tubes, but the use of 4 volts for 3-volt tubes and 2 volts for 1.1-volt tubes is recommended.
For B-batterys use vltages shown in the tables. When measuring plate current only (operation 4) as high as 90 volts may be used after the tube has been found free from short circuuits.
For making Grid Bias test use C battery posts.

Operation
1) Turn rheostat dial back to zero which is the "off" position.
2) Place tube to be tested in socket, using adapter when necessary.
3) Turn rheostat clockwise until the correct filament voltage is indicated on the 6-volt scale (3 and 5 volt points are shown in red).
4) Pressbutton "P" - the pointer should act immediately and the reading on the upper, or milampere scale, registers the milamperes flowing from the plate to the hot filament (Remark EE: we know that the electrons go the other way).
5) While still holding down "P", press "G" and the reading in the upper scale indicates the milamperes (space current) flowing from plate and grid to the filament.

Interpretation
1) The table indicates characteristic tests on a number of standard tubes known to be good. If readings do not come up to these, the chances are something is wrong.
2) When button "P" is pressed (operation 4) and the pointer drops back to zero, a poor vakuum, poor emission or or an open circuit between the plate and its terminal at the base is indicated.
3) If when button "P" is pressed, the meter indicates according to column 5 (in table) instead of column 4 as it should, and the pressing of button "G" (with "P") causes no change in pointer deflection, a shor circuit exists between plate and grid.
4) If a proper reading is shown when "P" is pressed but no change occurs on pressing "G", an open circuit between the grid and its terminal at the base is indicated.
5) If after pressing "P", a deflection much lower than according to table 4 is shown and no change occurs on pressing "G" a poor vakuum or poor emission in the tube is certain.

Used as a voltmeter
For "A" Battery - set rheostat at 150 and connect as shown in first paragraph. The voltage is indicated on the 6-volt scale (also 10 milamps. 600 ohms resistance).
For "B" Battery - connect the "B" Battery positive to "A Bat +" terminal and "B" Battery negative to "B Bat -" terminal. Press Button "P" and the voltage is indicated on lowest scale 0-24 volts.

The table is shown on a photo here which is taken from the bottom of these instructions.
Net weight 1 kg / 35.3 oz
Mentioned in Antique Radio ClassifiedErwähnt in der Sammlerzeitschrift aus den USA: Antique Radio Classified. (Vol.14 No 7, July 1997, Page 14)
   
This model was suggested by Ernst Erb.
I have a photocopy with some description about the company plus 4 pictures. The titel: \Vintage Test Equipment\. I believe it is from \Antique Radi After taking off the wooden base plate (4 screws). Label in front More pictures  
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Tube Tester 100 (Hoyt Electrical Instrument Works; New Hampshire)

 
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