SKU:89798073848
Matched Quad Sylvania 5814 5814A JAN-5814A ECC82 Vacuum Tubes Valves Milspec / Industrial NOS-Testing
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Ships within 48 hours · Estimated delivery Aug 5 - Aug 10
Description
Matched Quad Sylvania 5814 5814A JAN-5814A ECC82 Vacuum Tubes Valves Milspec / Industrial NOS-TestingThis new old stock testing matched quad of milspec industrial Sylvania JAN 5814A 12AU7A dual triodes was tested on our Maxi Preamp II for shorts, gas, noise, transconductance and gain. There were no shorts, noise or gas and they tested as follows: Tube One: Noise: 83. 5 dB 83. 4 dB ( 92 dB is the Maxi Matcher's noise floor) Transconductance: 1387 1439 Gain: 16. 9 17. 3 Tube Two: Noise: 83. 5 dB 85. 3 dB Conductance: 1475 1430 Gain: 16. 9 17. 2 Tube
new in box GE 5727 tube tested to spec on our Hickock 800
They are somewhat microphonic
new in box GE 26HU5 tubes tested to spec on our on our Jackson 648
Tube Two measured 10
These tubes have excellent silkscreening
Transconductance measured 2800/3100 micromhos where new 12AT7s / ECC81 typically test within 1
Transconductance: 1541 / 1532
Minimum (65%) is 32/32 and 100% 66/66
This CD-Rom is in fine shape
new in box Matsushita 9AQ5 / PCC85 tubes tested to spec on our Paul Hart-calibrated TV7/U
only six tubes are available
double-D getter and a 337 2R48 date / provenance code
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