2 x Vintage NOS Telefunken E80CF ◇Diamond Germany ~ Gold Pins ~ Preamp Tuner Audiophile Tube ~ 7643 / Premium ECF80 6BL8 6f1 Upgrade ~ McIntosh / Scott / Dayton ~ Holographic Layered Tone Natural Mids Smooth Clarity

our entire catalog is available w/ digital test results! including gain noise waveform life checks and more

premium 7643 e80cf = special quality resilient rugged ecf80 / 6bl8 / 6f1 upgrades, great for a variety of audio/tuner apps:

mctinosh tuners, dayton audio hybrid amps, studio dacs, scott amps, chinese 6f1, mr 65b, mr 67, mr 71 (x2)

scott 333-a, 333-b, 335, 340-a, 350-a, 350-b, 350-c, 350-d, 355, 380, 299-a, 4310, lm-35, t-110-a, lt-110-b

the breath of life telefunken! the top sonic darlings of any collection, w/ a layered tonality, smooth rich warmth, and clear resolve

featuring a revered ultra low-noise floor, bloomy articulation, and incredibly natural flat-response ~ a truly great fidelity upgrade

the holographic sound reproduction is one-of-a-kind, w/ subtle frequency compression, often compared to siemens resolution/bite

premium vintage 1960s metallurgy and stage definition is grail ranked for vocal showcases, w/ low-distortional harmonics

the organic sonic clarity, long life, and unique liquid tonal-doubling, all contribute to the collectible telefunken sonic lore!

2 x old stock telefunken <> diamond base 7643 e80cf w/ gold pins

nice silkscreens visible (not a relabeler!) and oe boxes included

full mutual conductance gm test, several pristine pairs in stock:

pair1: 130 pentode / 100 triode % gm ~ 125 pentode / 100 triode % gm 

pair2: 130 pentode / 105 triode % gm ~ 120 pentode / 100 triode % gm 

+ undergoes a complimentary value-added refurbish screen and deoxit process ~ one of a kind quality control

give several sessions or up to 150+ hours w/ your specific amps voltage to break-in / fully cure

ships well packed worldwide! economy / priority / express postage option available