The 5814A tube is a military-spec version of the 12AU7 double triode tube, known for its ruggedness and low noise. The 5814A has a 12AU7 equivalent with enhanced durability, separate cathode connections, and often features like triple micas or gray/black plates for increased structural support and reliability.
Item Tag: United States
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Tested Matched Trio Unbranded 5814A Tubes Gray Plates Halo Getters 5814 A Tubes
Each one retains the 5814A number although faintly. However the numbering font style on one is slightly different. Aside from that, they are structurally identical with one have a little less getter flashing than the other two.
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5814A Matched Pair Vacuum Tubes Sylvania Grey Plate Hickok Tested
Experience the reliability and quality of Sylvania with these 5814A vacuum tubes, Hickok tested to ensure top performance.
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Matched pair Magnavox 5814A tubes, Tested. Vintage Electronics
Qty 2) Magnavox 5814A tubes, NOS. Spending more time testing and measuring dual triodes. These were 1st tested on a Hickok 752A. 1st tube, 1050/1025, 2nd tube 1075/1050. These tubes also curve traced on a 577, all four curves shown in pictures. Trace shown is 200v, 5 mA / div, 1 v step. These tubes have added mica layers, see pictures. Complete satisfaction the tube sections are matched or return for full refund.
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Two GE 5814A Tubes / X3 Mica / Horseshoe Getter / Amplitrex Tested / 12AU7 ECC82
Two GE 5814A tubes. Tested on Amplitrex AT-1000 computerized tube tester (fixed bias mode). Large horseshoe getter. Triple mica. Tubes test 2000, 1900 and 2100, 2100 where pass/fail is 1430 micromhos.
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Vacuum Tube SYLVANIA JHS 5814A [12AU7] – NOS – TESTED **FREE USA SHIPPING
JHS 5814A [12AU7]. By SYLVANIA. ALL SOLD AS-IS. make this clear.
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2 SYLVANIA Gray Plate O Getter JAN 5814A Tubes, Maxi-Preamp II Tested NOS SM1356
Gain (NOS Value=17 mu) 17.0 mu 17.6 mu. Gain (NOS Value=17 mu) 17.8 mu 17.5 mu. Tested on a Hi End Maxi-Preamp II tester for Gain (Mu), Transconductance (Gm), and Noise (dB).
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Platinum Matched Pair 5814A 12AU7WA NOS TUNG-SOL Audio TUBE Long PLATES
NOS tubes fall within the Gm characteristic range of an average tube, as published in the RCA RECEIVING TUBE MANUAL, which states “Individual tubes, like any manufactured product, may have characteristics that range above or below the values given.
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5814A 12AU7A NOS/NIB GE 5 Star Twin Triode Tube-1961-Tested-Free Shipping in US
Close balance. Tested for new performance and is factory fresh.