YOU GET ALL 4 AS PICTURED. IF YOU HAVE ONE OF THESE ORGANS (THEY ARE A RARE KIT BUILT ORGAN AND NOT MANY EXIST), THESE ARE A MUST TO MAKE IT ORIGINAL. VERY HARD LABEL TO FIND. THEY ARE USED BUT AS THE TEST RESULTS SHOW, THEY ARE TESTING 1500 EACH SECTION (1600 IS NOS).
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TESTED ON A MAXI PREAMP II TUBE TESTER FOR GAIN(Mu), TRANSCONDUCTANCE(Gm) AND NOISE(dB). While performing an audio tap test on the Maxi Preamp through a guitar amp Triode A tested excellent when tapped, Triode B tested excellent when tapped.
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Tested on Amplitrex AT-1000 tube tester (fixed bias mode). Two Raytheon 12AX7 tubes. triode #1 = 1200 micromhos @. 9mA plate current emissions / 92.2 Mu gain. Triode #2 = 1200 micromhos @. 7mA plate current emissions / 92.2 Mu gain.
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Raytheon Grey Short Plate Halo Getter 12AX7A Vacuum Tube Hickok & Maxi Tested. Made in Korea. Near perfectly balanced sides. Box has wear and tear from storage. Test results will vary between tester models.
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4 x 12ax7a Raytheon Tubes. Tested on enhanced Triplet E3444 laboratory Tester prepared by Paul Hart of Roswell Ga. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable.
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1 x 12ax7 Raytheon Tube. Tested on Enhanced Triplet E3444 Laboratory Tester. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable. Long Black Plates.
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For sale is a macthed pair Raytheon 5755 closely matched at 1% on gain and balanced triodes. Close electrically to an 12AX7 but different pin out. Price per 2 (one pair). NOS made in USA. Because of there special rugged build this are very quiet and low on microphonics.
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NOS RAYTHEON 12AU7/SMOOTH BLACK PLATES/DUAL POST GETTER/MAXI TESTED
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