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RAYTHEON JRP 12AX7 Long Black Plates USA 1962

RAYTHEON JRP 12AX7 Long Black Plates USA 1962
Military spec. tubes from early 1960's by Raytheon. Long Black Plates with O-Getter. Rare and considered one of the best 12AX7's ever made. Here is what Vacuum Tube Valley Magazine (Issue 14) had to say about this tube :
“This super rare tube was magical, it that it did everything beyond perfect. Dynamics and micro-detail were astonishing and noticeably better than any other 12AX7 in the test. It was unanimous amongst the reviewers that this was their favorite tube.”
Available in original military boxes.

Quantity in Stock : Out of Stock!
Price : Grade A @ US$90,00/ea ; US$185,00/matched pair
          Grade B @ US$80,00/ea ; US$165,00/matched pair         
          Grade C @ US$45,00/ea ; US$90,00/matched pair

Grade A - The best in the stock. Lowest noise and microphony with the tightest balanced sections we have available. This is typically 10% or often tighter given the large volumes of our stock.

Grade B - Low noise and microphonics with a section balance typically between 15% and 20%, but may be higher depending on available stock. 

Grade C - Lowest noise but slightly microphonic. Section balance will be similar to Grade A or B. This grade is only suitable for use in the driver stage of an amplifier, or the output/buffer stage of a DAC or CD Player.

2 comments:

  1. Totally blown away by these. I have been trying a multitude of different tubes in my AC15 for the past few months. As soon as I plugged this one in I knew I found it. Amazing tube!

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  2. The Raytheon tube that won the impressive 12AX7 shootout in Vacuum Tube Valley magazine Issue 14 (2000) was the 1957 variant : long black plate with square getter.

    A very rare tube that can be microphonic in one of the triodes if not carefully selected. The 1950s Raytheon were considered to be the quietest 12AX7s in their day. I own both versions.

    JM Juilland

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