NOS Vintage Collectible JRC 1U5 vacuum tube, PKD 12-59 Post WWII, early Cold War

$24.95 Buy It Now or Best Offer
free,30-Day Returns

Seller Store aheadtothepast
(33) 100.0%,

Location: Peoria, Arizona
Ships to: US,
Item: 196712723949

Restocking Fee:No
Return shipping will be paid by:Buyer
All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money Back
RCA:RCA
Type:Vacuum Tube
1U5:1U5
MPN:JRC 1U5
Country/Region of Manufacture:United States

This vintage vacuum tube, model 1U5 similar to CV-3912, is a collectible item from the United States. It is packaged in its original box and is a must-have for vintage electronics enthusiasts. The brand is SYLVANIA, and is also branded with the designation JRC. This item is perfect for those interested in vintage parts and accessories, vintage audio and video, and vintage tube sockets. It is a great addition to any collection and is a rare find. Don’t miss out on the opportunity to own this piece of American history. The 1U5 is a miniature diode sharp cut off pentode designed for use has a combined detector and audio frequency amplifier, and automatic volume control tube in compact battery operated receivers. The diode section is effectively shielded from the pentode section to reduce feed through effects. Cathode coated filament, filament voltage DC 1.4 volts, filament current .05 ampere (50 milliamps). At just 50 milliamps of current to operate the filament, this tube could run a very long time off of a single D cell alkaline battery. it would lend itself very well to portable battery powered radio circuits that employ low level audio into headphones or earphones, or to drive a separate audio amplifier circuit connected to a small speaker. Many DIY’ers and radio enthusiasts have searched for years in the spec sheets for tubes that can successfully be used for just such applications. Many have used what are known as Space Charge tubes, originally designed to work in automobile applications for onboard radios in the mid to late 50’s, just before the invention of the first transistors. Thanks to early, unreliable Germanium transistors, the Space Charge tube was used for a long time until transistors were improved and ubiquitous enough to be employed in new all solid state car radios. Those tubes are wonderful, except they take 3 times as much energy to fire and that is fine if you have a 12 volt vehicle battery handy. These one volt tubes have been in portable radios since someone first came up with the idea to have a radio small enough to carry around to ball games, horse races and to a local gathering spot to listen to election results. Back then, radio WAS the internet,…and MP3 player combined! And back then the A battery used in portables made D cells look puny. Some of the B batteries for the plate voltages were the size of bricks and weighed almost as much. This particular line of tubes was built under a Federal contract by RCA and packaged in Dec 1959, the Post WWII era. The box has been through a bit of dampness, but has survived to this day in reasonable shape. The Joint Review Council (JRC) designation was a special MIL-SPEC classification and usually involved extra rigorous testing for thermal and inertial survivability to ensure the designs would hold up under the most demanding and harshest of environments. Handy to have to build with AND collectible, how can you beat that? If you have been searching for « Holy Grail » low filament current tubes, here is a number you don’t see often in batches of so-called NOS tubes that people sell here on eBay. It is also packaged in an extraordinarily unusual sleeve.Grab a piece of American history made possible by DOD Surplus sales after the WWII Era and the beginning of The Cold War era!!!As always, thanks for looking, and shipping won’t gouge your budget on my items.

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NOS Vintage Collectible JRC 1U5 vacuum tube, PKD 12-59 Post WWII, early Cold War

Frequently Asked Questions About NOS Vintage Collectible JRC 1U5 vacuum tube, PKD 12-59 Post WWII, early Cold War in My Website

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