ATTENTION: THIS IS THE SECOND & LAST ‘KR-3’ GE X-RAY TUBE WE HAVE TO OFFER. THIS IS A VERY RARE BIRD & IN ‘VERY GOOD’, OR BETTER, CONDITION. THERE ARE NO OTHERS HERE, AND THIS GENUINE GE X-RAY TUBE BEGAN ITS USEFUL LIFE IN THE 1940’s ON THE HAWAIIAN ISLAND OF ‘MAUI’ AT THE UPCOUNTRY ‘KULA HOSPITAL’, NOW PREDOMINANTLY A PSYCHIATRIC IN-PATIENT TREATMENT CENTER. DURING & AFTER THE WAR, THE ‘KULA HOSPITAL’ SAW SERVICE WITH EMERGENCY-ROOM MEDICAL & OTHER TREATMENT SERVICES. I WRITE THIS, TO GIVE YOU A BIT OF HISTORY OF THE TUBE OFFERED HERE..
THE GENERAL ELECTRIC KR-3 WAS THE VERY FIRST COMMERCIALLY AVAILABLE X-RAY (“COOLIDGE”) TUBE AVAILABLE IN THE WESTERN WORLD. AFTER DECADES OF RESEARCH AND THE EFFORTS OF A DEVOTED SCIENCE/ENGINEERING TEAM, GE BROUGHT THE ‘KR-3’ X-RAY TUBE INTO MANY MEDICAL & INDUSTRIAL APPLICATIONS AND IT WAS DURABLE AND ADAPTABLE – BUT VERY, VERY EXPENSIVE DURING ITS FIRST YEARS IN THE EARLY 1930’s. PROVING ITSELF IN MANY FIELDS AND IN THE TEST OF TIME/LONGEVITY THE TUBE DESIGN WAS NOT RETIRED UNTIL AFTER THE WAR. HIGHLY COLLECTIBLE, VERY DIFFICULT TO FIND MORE THAN JUST PHOTOGRAPHS..
THE KR-3 X-RAY TUBE I HAVE OFFERED HERE IS IN VERY, VERY GOOD CONDITION, WITH CLEAN, CLEAR AMBER & GREEN GLASS, STILL UNDER VACUUM AND THE METALLIC PARTS INSIDE ARE EXTRA-ORDINARILY SHARP-EDGED AND LITTLE TO NO CORROSION INSIDE. THE EXCEPTION IS A BUILD-UP OF YELLOWISH SUBSTANCE INSIDE THE GLASS COATING ONLY A PORTION OF THE LARGE CENTRAL BULB (SEE PHOTOS). THIS, PRESUMABLY FROM USAGE OF THE TUBE, A BY-PRODUCT OF THE ENERGY AND METALS THAT ARE USED IN CONJUNCTION TO CREATE THE X-RAY STREAM. (THESE EARLY TUBES OPERATED WITH COILS THAT SOMETIMES PRODUCED WELL OVER 100,000 VOLTS!) THE BAKELITE ENDS & CONDUCTOR PINS ARE IN VERY GOOD CONDITION ALSO. THE ACID-ETCHED (?) ‘GE KR-3 “COOLIDGE TUBE” ETC.’ LOGO ON THE SIDE IS VISIBLE – VERY FORTUNATE FOR THE TUBES’ AGE. OVERALL LENGTH: about 22.5″ WIDTH OF THE NARROW TUBE: 2.5″ WIDTH OF THE ‘BULB’: 5″
SHIPPED VIA USPS ‘PRIORITY MAIL’ w/ADEQUATE INSURANCE FOR SAFE & SPEEDY DELIVERY TO YOUR ADDRESS. WE SHARE IN YOUR SHIPPING COST! YOUR SHARE FOR THIS ITEM IS JUST $10.00, SEEMS FAIR TO JUST SPLIT THE ACTUAL COST..
WE HOPE YOU ENJOY OUR LISTING & FOR THE ONE WHO WINS THIS RARE, DEVELOPING U.S.A SCIENTIFIC ACHEIVEMENT ITEM: ENJOY! THANK YOU & GOOD LUCK BIDDING – gold.e.rocks
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