The Eimac 15R vacuum tube was first produced in 1940. It was used in the ASB-5 radar display unit. The ASB-5 was part of an airborne radar set used during World War II. The 15R is a high-voltage vacuum diode with a thoriated tungsten filament. These are new old stock manufactured in the 1940's and are in original boxes. This tube is inspectacular condition. The boxes have just a bit of shop wear and have a beautiful Eimac logo.
Overall length 2.75". Diameter 1.375" The third photo shows the 15R glowing. Only the low voltage filament need to connected for the tube to light.
filament: 5 volts @ 4 amperes
peak inverse voltage: 20,000 volts
max plate current: 30 ma
The side of the box reds:
OPERATING SPARE PARTS
MODEL ASB-5 EQUIPMENT
ITEM NO. 8
CIRCUIT SYMBOL V-601
H.V. RECTIFER TUBE
Eitel McCullough Corp was the original name of Eimac and was started in 1934.
I also have 15R tubes with uranium glass (vaseline glass) seal. Uranium glass glows under UV light:
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Almost all orders received before 11 am will be shipped the same day.
Typical transit times:
Priority Mail: 3 business days
First Class Package: 4-5 business days
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The one exception is digital downloads. There are NO returns on digital downloads.
I accept exchanges. You must pay shipping back to Leeds and shipping of new item to you.
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Leeds has been shipping with the United States Postal Service for 18 years and shipped thousands and thousands of delicate electronic parts and fragile vacuum tubes. In that time we have had only ONE claim for damage.
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