5Y3GT / 5Z2P GE NOS NIB Gray Plates Halo Getter Tube Rectifier Made in USA

5Y3GT / 5Z2P GE NOS NIB Gray Plates Halo Getter Tube Rectifier Made in USA Funke W19 Tested – VERY STRONG - Vintage American General Electric Production Test Results: Tube tested on Funke W19 Tube Tester: Test Conditions: Va = 100V ; Vf = 5V 100% Average: Ia = 77.5 mA Test Result: VERY STRONG Tube: Section 1: Ia = 95 mA Section 2: Ia = 93 mA Additional Tests Performed: Emission Quality: Excellent – Very strong and stable emission, without fluctuations. Short Circuits and GAS: None. Description: This General Electric 5Y3GT NOS NIB, of American production dating approximately to the 1960s, is a vintage rectifier of particular interest, preserved in its original GE box. The construction with gray plates, halo getter, GT bulb and octal base reflects the solid General Electric production tradition of the era. The results obtained on the Funke W19 are excellent: the two sections measured 95 mA and 93 mA respectively, against a 100% average value of 77.5 mA. The emission is therefore well above the reference, confirming a very strong, stable, and fully efficient tube, despite the natural cosmetic signs due to long-term storage. The difference of just 2 mA between the two sections also highlights an excellent internal balance, a quality that is particularly important in a dual-plate rectifier because it promotes uniform power supply operation. The tests also confirmed the total absence of short circuits and gas. The 5Y3GT is widely used in guitar amplifier power supplies, radio devices, hi-fi systems, and vintage tube electronics. It can also be used in equipment designed for the equivalent 5Z2P rectifier, after verifying the specifications provided by the manufacturer. A GE NOS in original box that combines authentic American construction, exceptionally high emission, and optimally balanced sections. The external markings are worn by time, but the documented electrical performance tells a very different story: a vigorous, reliable tube ready to be used in a quality piece of equipment. Condition: Condition: NOS - NIB - New Old Stock, New In Box - Tested and working - Supplied in Original Box. Functionality: Perfectly operational. Cosmetic condition: Adequate – Markings absent, overall aesthetics with evident signs of age. See photos for details. Manufacturing Code: None. General Electric production dating approximately to the 1960s based on construction characteristics. Discover why our tubes are different →