I can only respond to those who provide me their user name here on AA or on Agon, AudioMart, or Ebay. If the ad is up, they are available. If I do not answer an email, it's because it seems suspicious. Thanks for understanding. All tubes come with satisfaction guarantee to audiophiles who are members in good standing on the usual audiophile forums.True NIB/NOS - Perfect data - perfect sonics. Authentic old grey plate Siemens - very hard to find as NOS/NIB. All are 120% of new spec; they will last a very long time. $250/pair--there are two pairs now available, one pair has sold. All these were checked for sonics on a highly resolving headphone amp and also in my CJ Classic 60. I will warrant these all are quiet and I believe PHONO GRADE based on the headphone listening--and power amp. No noise--no microphonics. No leakage, no gas, no noise and rock-steady on life test. Hickok TV-10 D/U calibrated tube tester reading - NOS = 12,500 Gm. Min = 7,500 Gm. Maximum meter value = 15,000 Gm. Each tube in the quad has the acid-etched type and date code. Left pair of quad in pics are a perfect Date and type code and electronically matched; April-1964 NOS-NIB pair for $250 USA shipped. both were made April 1964 in the famed Siemens Munich factory. 4D 15,000/14,500
4D 15,000/14,500 Right pair of quad in pics are a perfect-matched; near meter-peg, 1965 NOS-NIB pair for $250 USA shipped. Singles are available from this pair at $150 each. 5E 14,500/15,000 (May 1965)
5K 14,250/15,000 (Nov 1965) ALL DATA ARE +/-2%--THE PRECISION OF THE TESTERS.
***ALL THESE four TUBES PEG MY EICO dynamic emission calibrated METER AT GREATER THAN 140%/140% of NOS-spec.**** 140% is THE HIGHEST NUMBER ON THE EICO 666 METER, WITH 110%-120% for TRULY NOS tubes, ****No inter-electrode leakage (IEL) whatsoever--and the EICO 666 is known to be as good as the best testers in this regard. IEL can relate to gas--and the Hickok TV-10D/U confirms zero gas values for all 12 electrodes.**** If you are using new production tubes--or Russian stock, you will be surprised--possibly stunned (I mean it)--by how tubes such as these will transform your listening experience. Furthermore, I have found surprising synergies between tubes and interconnects--indeed--I now believe that cables matter, especially in combinations that are synergistic with certain tubes! Free Tracked Shipping in USA - No Paypal Fee. ***COS-USA Only - No international sales unless we agree beforehand***. ****Please note: you will have to state serious interest to buy for me to answer emails and you must provide your username on some credible site. I have very high, perfect seller and buyer feedback on ALL the usual sites as NuRxHunter, especially for tube sales.
Thanks for reading.
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