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NEC 12AD7 NOS Double Triode Tube Valve Rohre Preamp Low Hum & Microphonic




Item History & Price

Information:
Reference Number: Avaluer:17706295Model: 12AD7
MPN: Does Not ApplyCountry/Region of Manufacture: United States
Brand: NECType: Preamp Tubes
Original Description:
FOR SALE NEC 12AD7 Double Triode Tube.Noval B9A.Halo getter .Flat Grey plates.From old military stockStrong and balanced test results.Low-hum, low-microphonic dual triode, intended for audio preamplifier stages. Mu 100.
Similar to 12AX7 with heater current raised to 225mA.Virtualy all of these tubes were meant for critical test, aircraft, and hospital applications, they are all virtually guaranteed to be low noise and low microphonics. Long out of production and rarely fo...und today.This tube makes a great upgrade to any preamp, amp, or professional recording equipment that uses 12AX7 or 7025.

 Testedon AVO 160 With:Uf: 6 V~Ua: 250 VUg1: - 2 VResults: Ia = 2 / 2 mA (1.25 mA = average)                  S = 2.2 / 2.2  mA/V (1.6 = average)               
               
 All ourtubes are tested for shorts and gas leak.Combined shipping is nevermore than 14.95 $ Worldwide.Feel free to visit my store ‘euromoments’ for more vintage tubesItems will be carefully packed to ensure save arrival.Thank you for checking the other listings.We ship usually within one day after payment.  



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