Strobotac 631-B
General Radio Company; Cambridge (MA)
- Country
- United States of America (USA)
- Manufacturer / Brand
- General Radio Company; Cambridge (MA)
- Year
- 1939–1953 ?
- Category
- Service- or Lab Equipment
- Radiomuseum.org ID
- 332238
-
- alternative name: GenRad
- Number of Tubes
- 3
- Wave bands
- - without
- Power type and voltage
- Alternating Current supply (AC) / 115 Volt
- Loudspeaker
- - - No sound reproduction output.
- Material
- Metal case, TUBES VISIBLE
- from Radiomuseum.org
- Model: Strobotac 631-B - General Radio Company;
- Shape
- Tablemodel without push buttons, Mantel/Midget/Compact up to 14
- Dimensions (WHD)
- 7.5 x 8.75 x 9.875 inch / 191 x 222 x 251 mm
- Notes
-
The Strobotac Type 631-B supersedes the Type 631-A. The Type 631-B was first listed in the General Radio Catalog K1 (1939), while the Type 631-A was no longer listed.
Regarding the Strobotac's Strobotron Cold-Cathode Neon Flash Tube, the Type 631-P1 is listed for all variants of the Strobotac Type 631 series.
Regarding the Strobotac's Full-Wave Rectifier and Power-Amplifier Twin Triode, the General Radio Catalog K1 (1942) lists 6X5 (Full-Wave Rectifier) and 6N7 (Power-Amplifier Twin Triode). Starting with Catalog K2 (1942) and ending with Catalog K5 (Late-1945), the the Rectifier and Triode are listed as Type 6X5-G and 6N7-G. From General Radio Catalog L (1948) through Catalog M (1951), the Rectifier and Triode are listed as 6X5-GT/G and 6N7-GT/G.
Regarding the Power Consumption of the Strobotac, the Type 631-B is listed at 25 Watts in General Radio Catalog K1 (1939) through Catalog K5 (Late-1945). The Power Consumption is then revised to 35 Watts in Catalog L (1948) and then to 35 Watts Maximum in Catalog M (1951).
Regarding the Strobotac's Weight, Catalog K1 (1939) listed the Type 631-B at 10 lbs, while Catalog K2 (1942) through Catalog K5 (Late-1945) listed it at 8.75 lbs, and Catalog L (1948) through Catalog M (1951) listed it at 9.5 lbs. As a comparison, the Type 631-A was listed at 12 lbs in Catalog J (1936).
Regarding the Strobotac's Dimensions, General Radio Catalog K1 (1939) through Catalog M (1951) lists the Type 631-B to measure as follows: W 7.5" x L 8.75" x H 9.875".
Regarding the Strobotac's Power Supply, Catalog K1 (1939) lists the requirement of 115 Volts at 60 Cycles, while Catalog K2 (1942) through Catalog M (1951) lists the range of 105-125 Volts at 60 Hz.
Regarding the Strobotac's Accuracy, Catalog K1 (1939) through Catalog M (1951) list +/- 1% of the dial reading above 900 rpm when the Strobotac is standardized in terms of a frequency controlled power line.
Regarding the Combination of the Strobotac Type 631-B and Strobolux Type 648-A, it has all the advantages of the Strobotac itself plus the feature of high-intensity illumination.
- Net weight (2.2 lb = 1 kg)
- 10 lb (10 lb 0 oz) / 4.540 kg
- Price in first year of sale
- 95.00 USD
- Mentioned in
- - - Manufacturers Literature (General Radio Catalog K1 (May 1939) through Catalog M (October 1951))
- Author
- Model page created by Peter Murguia. See "Data change" for further contributors.
- Other Models
-
Here you find 238 models, 212 with images and 128 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from General Radio Company; Cambridge (MA)