Vacuum tube
Use this image
Can I reuse this image without permission? Yes
Object images on the Ingenium Collection’s portal have the following Creative Commons license:
Copyright Ingenium / CC BY-NC-ND (Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
ATTRIBUTE THIS IMAGE
Ingenium,
1969.0541.001
Permalink:
Ingenium is releasing this image under the Creative Commons licensing framework, and encourages downloading and reuse for non-commercial purposes. Please acknowledge Ingenium and cite the artifact number.
DOWNLOAD IMAGEPURCHASE THIS IMAGE
This image is free for non-commercial use.
For commercial use, please consult our Reproduction Fees and contact us to purchase the image.
- OBJECT TYPE
- TRANSMIT/RECEIVE SWITCH
- DATE
- 1942
- ARTIFACT NUMBER
- 1969.0541.001
- MANUFACTURER
- Sylvania
- MODEL
- 721A
- LOCATION
- United States of America
More Information
General Information
- Serial #
- 1064
- Part Number
- 1
- Total Parts
- 1
- AKA
- N/A
- Patents
- N/A
- General Description
- GLASS/ METAL
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 7.7 cm
- Width
- 3.9 cm
- Height
- N/A
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Vacuum Tubes
- Category
- Radar
- Sub-Category
- N/A
Manufacturer
- AKA
- Sylvania
- Country
- United States of America
- State/Province
- Unknown
- City
- Unknown
Context
- Country
- Unknown
- State/Province
- Unknown
- Period
- WWII
- Canada
-
Unknown - Function
-
USED IN PULSED RADAR SYSTEMS AT 5-BAND FREQUENCIES NEAR 3000 MHZ/ USED IN SHUNT BRANCHING CIRCUITS/ USED AS EITHER A RECEIVER-DISCONNECT OR TRANSMITTER-DISCONNECT DEVICE - Technical
-
THE 721A WAS AN ESSENTIAL PART OF THE RADAR EQUIPMENT ON ALMOST EVERY MAJOR SHIP IN THE US FLEET - Area Notes
-
Unknown
Details
- Markings
- PRINTED ON GLASS: 'SYLVANIA/ 721-A/ MADE IN U.S.A./ 1064'
- Missing
- N/A
- Finish
- UNCOLOURED GLASS WITH ORANGE PRINTING
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Sylvania, Vacuum tube, circa 1942, Artifact no. 1969.0541, Ingenium – Canada’s Museums of Science and Innovation, http://collections.ingeniumcanada.org/en/id/1969.0541.001/
FEEDBACK
Submit a question or comment about this artifact.
More Like This
![...](https://files.ingeniumcanada.org/items/coll/95/849/1969-0507-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/85/809/1966-0493-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/59/483/1989-0280-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/69/152/1994-0272-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/69/153/1994-0271-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/65/288/1992-1139-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/59/488/1989-0275-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/65/296/1992-1131-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/43/402/1982-0686-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/86/004/1966-0382-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/59/508/1989-0255-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/50/864/1986-0761-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/57/880/1988-0668-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/69/164/1994-0261-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/43/337/1982-0738-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/59/498/1989-0265-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/65/285/1992-1142-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/57/882/1988-0666-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/85/670/1966-0573-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/59/497/1989-0266-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/59/495/1989-0268-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/85/511/1966-0678-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/85/857/1966-0471-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/85/682/1966-0562-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/57/883/1988-0665-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/59/502/1989-0261-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/71/999/1995-0624-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/57/881/1988-0667-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/87/423/1967-1119-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/86/026/1966-0363-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/86/022/1966-0367-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/79/510/1999-0229-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/79/518/1999-0225-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/49/963/1985-0365-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/110/581/1976-0796-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/79/464/1999-0252-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/110/584/1976-0793-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/69/165/1994-0260-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/79/520/1999-0224-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/110/583/1976-0794-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/86/007/1966-0380-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/64/880/1992-1383-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/104/312/1972-0046-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/113/516/1977-0342-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/95/854/1969-0503-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/85/904/1966-0432-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/86/032/1966-0361-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/85/858/1966-0470-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/65/595/1992-0893-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/79/564/1999-0212-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/117/028/1979-0598-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/54/107/1987-1200-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/104/256/1972-0095-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/79/462/1999-0253-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/77/739/1998-0645-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/102/763/1972-0584-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/95/830/1969-0526-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/65/335/1992-1092-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/43/272/1982-0798-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/51/124/1986-0553-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/95/828/1969-0528-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/93/371/1969-1475-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/79/474/1999-0247-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/57/900/1988-0655-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/95/853/1969-0504-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/51/113/1986-0563-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/101/108/1971-0240-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/117/027/1979-0599-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/64/867/1992-1394-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/95/809/1969-0542-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/95/847/1969-0509-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/96/042/1969-0410-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/95/838/1969-0518-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/95/832/1969-0524-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/95/835/1969-0521-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/72/000/1995-0623-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/107/622/1974-0039-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/95/824/1969-0532-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/77/681/1998-0674-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/93/372/1969-1474-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/51/123/1986-0554-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/71/967/1995-0653-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/64/214/1992-1672-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/72/001/1995-0622-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/93/377/1969-1469-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/95/812/1969-0540-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/51/058/1986-0617-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/93/364/1969-1482-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/107/631/1974-0033-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/51/061/1986-0614-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/93/360/1969-1486-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/51/064/1986-0611-001-aa-cs.jpeg)
![No image available.](https://files.ingeniumcanada.org/static/No_image_sq.png)
![No image available.](https://files.ingeniumcanada.org/static/No_image_sq.png)
![...](https://files.ingeniumcanada.org/items/coll/93/359/1969-1487-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/95/837/1969-0519-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/71/980/1995-0640-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/93/378/1969-1468-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/96/138/1969-0362-001-aa-cs.jpeg)
![...](https://files.ingeniumcanada.org/items/coll/95/840/1969-0516-001-aa-cs.jpeg)