Description: Rare 1955 CBS 12AU7 Matched Pair MIL SPEC Long Grey Plate D Getter Hickok&MAXI Tested NOS NIB. Closely matched sides and pair with same date codes. Maxi-Preamp 2 tester results: Tested noise: < 92 DB, Gain (16.5 & 17.0 MU and 17.4 & 16.7 MU). One box does not have print on it. Tested per user manual procedures on recently calibrated Hickok 6000A. Passed all tests: Mutual Conductance (GM) Test: 2300 & 2350 and 2200 & 2450 / 2200 (NOS Minimum) Filament Continuity Test: Passed Shorts Test: Passed Quality Test: Passed Gas (Grid Current) Test: Passed Life Test:Passed Also tested in THD Guitar amp for performance and sound at operating voltage. Very good sounding low noise tubes. I do my best to test using both vintage and modern test equipment for most reliable and comparable results along with testing in amps when possible. Test results will vary between testers. Will combine shipping.
Price: 89.99 USD
Location: Utica, Michigan
End Time: 2025-02-04T01:43:55.000Z
Shipping Cost: 6.5 USD
Product Images
Item Specifics
All returns accepted: ReturnsNotAccepted
Brand: CBS
Type: Vacuum Tube
Model: 12au7
MPN: 12AU7A
Country/Region of Manufacture: United States
