A perfectly matched pair of true NOS (un-used) Raytheon black plate, angled D getter, triple mica 5814 tubes (12AU7). The Raytheon and CBS blackplate 5814's are my favorite American made 12AU7 variants by far, and many others tend to agree. Professionally tested on a state-of-the-art Amplitrex AT1000 digital tube tester (full results included). GM test results were 95%/100% for tube 1 and 100%/100% for tube 2. Also tested for noise, gas and H to K leakage. Identical date/batch codes (1950's). You won't find a cleaner, nicer, more closely matched pair anywhere, especially at this price. I will cover PayPal fees at my asking price.
These are part of a HUGE collection of 12AU7/5814 variants that I will be listing soon. I have many more CBS, Raytheon and RCA blackplates, as well as Amperex Long plate D getters, Mullard long plates and the highly sought after Amperex 7316's. Feel free to e-mail me with any questions you may have.
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