Philips ECC83 12AX7 Long Plates Foil D-getter Matched Pair Holland 1957/58 - NOS

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Seller: Top-Rated Seller frankshaohuawang ✉️ (1,109) 100%, Location: Torrance, California, US, Ships to: WORLDWIDE & many other countries, Item: 266459142614 Philips ECC83 12AX7 Long Plates Foil D-getter Matched Pair Holland 1957/58 - NOS. Perfect matched pair of vintage Philips Miniwatt ECC83 12AX7 Foil D-getter tubes 17mm long plates - Made in Holland - 1957/58 - Super Strong NOS - Extra Rare Product Summary The "textbook Heerlen sound" has been referenced in several Soundlumia listings of Amperex Holland 12AX7/ECC83 tubes, and many tube enthusiasts asked what that all means. So this is the answer: the late 1950s and very early 1960s tone, the beginning of over a decade's excellence in sound, the classic tonal template for all the great (and greater) Amperex/Philips/Valvo/Miniwatt tubes to be made in the years to come, the timeless Philips radio tone that many of us grew up listening to.  Sound Characteristics  The most distinctive sound feature of the Heerlen ECC83's is the transparent, natural and expansive midrange presentation, with a slight touch of warmth that illuminates your music. Every piece of music you play through these tubes sounds like from a vinyl record, whether your sound source is phono or not. The sound stage is spacious, deep and structured. Bass is incredibly deep but well controlled and feels as accurate as on the high end German ECC83's (Siemens, Telefunken, Valvo etc.) Thanks to the very rare foil d-getter on this pair, you get with fast response (as in the solid-state fast), overwhelming detail in sound and the realistic bass - this is truly the Holy Grail sound of Philips ECC83! Professional Tube Testing  Both tubes tested Super Strong NOS     (120%+ nominal mutual conductance)  on a reliable recently calibrated Mercury 2000 tube tester with the following results (mutual conductance both in  uMhos and in percentage of nominal ): Tube 1:  1,300/1,350   (130%/135%) Tube 2: 1,230/1,230  (123%/123%) Good tubes start at 700  and new tubes (incl. NOS/NIB) 1,000 , and the Mercury 2000's rated mutual conductance (nominal) for new tubes is 1,000 . Test result can also be seen in the pictures. In case you wonder what all these numbers mean to your sound experience, it's actually quite straightforward: mutual conductance directly translates to tube's ability to amplify sound , so the higher these numbers the stronger.  Appearance & cosmetic condition Besides the world-class sound characteristics, we still treasure this pair for its near pristine cosmetic condition given the tubes' age - nearly 100% of the paint is still intact on both tubes, and the Heerlen date codes are perfectly visible on both tubes:  delta 7L  (delta = Heerlen, Holland,  7  = 1957, L = December) delta 8D  (delta = Heerlen, Holland, 8 = 1958, D = April) Shipping Policy   - Ship worldwide! Flat-rate shipping (USPS Ground Advantage) within the US.   - Same business day handling. Orders placed by 2:00PM US Pacific Time  on weekdays are posted on the same day, otherwise the next business day.   - Combined shipping available - request invoice for total before making payment or receive shipping credit after order ships.   - Customers outside the US please pay extra attention:  International shipping is through USPS First Class International Mail by default. It's the least expensive option but it may take longer than other carriers and tracking info may not be available in some countries after customs clearance. If you prefer to use a different carrier please contact us first so we can get you the correct shipping rates before you make payment. Return Policy - Please READ carefully Returns are acceptable if we made a mistake by delivering you wrong or defective products. Tubes we sell are guaranteed to work because we run professional tests and sound evaluation TWICE: before they are approved for listing AND before we ship them to customers. So the "defective item" case doesn't exist and please do not bother trying - this type of returns will NOT be accepted without proof that tubes are faulty and we will open disputes with eBay. Sound experience is very subjective and we do NOT accept returns because you do not like the tube's sound signature or because you changed your mind about your purchase. Please contact us to work things out before submitting return requests claiming "item is defective" or "item not as described."  Tube rollers abusing the return system will be reported to eBay immediately and negative feedback will be left to your account - that's guaranteed. We have already reported several abusers and eBay has ruled in our favor the dispute cases. We are more determined than ever to continue working with eBay to help rid of these unprofessional, unjustified, unkind, unfair and unacceptable abuses that are detrimental to the eBay marketplace, the vintage tubes market and the audiophile community. 
  • Condition: Open box
  • Condition: Super Strong NOS - The Holy Grail of Philips ECC83 - Dutch house tone at its best - Clean instrument separation and detail retrieval - Superb vocals - Ultra low noise - Foil-D getter - Ultra Rare
  • Brand: Philips
  • Type: Preamp Tubes
  • Custom Bundle: No
  • Model: 12AU7 12AU7A ECC82
  • Country/Region of Manufacture: Netherlands
  • Modified Item: No

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  •  Popularity - 13 watchers, 0.1 new watchers per day, 164 days for sale on eBay. Super high amount watching. 0 sold, 1 available.
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  •  Seller - 1,109+ items sold. 0% negative feedback. Top-Rated Plus! Top-Rated Seller, 30-day return policy, ships in 1 business day with tracking.

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