MATCHED QUAD of early 1960's close, super early production RCA 12AX7A / 7025 type.
Exhibit A, shows actual tube under test, dynamic emissions at full load for easy reference. All (4) tubes / all (8) sides read STRONG 115 to 120 %.
They test (and sound) strong, quiet and were current matched (balanced) on a 2nd lab tester at full plate 250V.
Still in old paper boxes, they've been stored carefully for years. Very old tubes, pretty low hours , they have lots of life left -- from early HiFi estate and 40 years in storage. Just throughly checked using multiple testers and played with music. Working well; quiet and matched, detailed and sounding great! Guaranteed no problems. The most throughly tested, closest matching set of these you'll will see anywhere! Very hard to find They will sell quickly.
Dealers everywhere can no longer find these early RCA's, as they haven't been made for nearly 50 years. And for guitar amps -- these are some of the very best tubes you can use ... and this QUAD; have plates that are incrediblely close, and strong like new at the full operating 250 volts eP -- .. they are also all very close dates of production, and at the start of the 15mm design ... very earliest incarnations of the 12Ax7A/7025 .. all (4) are from years encompassing RCA's first generation of the 7025 -- early 1960 til the end of the decade. (see exhibit B,C,D).
Cosmetics are very nice .... flashing is very shinny & thick, idicative of gentle, low hours and a long life ahead. Two tubes have rubbed letters, and a slight streak in the flashing.. but they really present well. Strong and super quiet (no microphonics), no gas or shorts. They were carefully checked and played with music -- for full details please read the reports in exhibit B,C,D below, for date codes and test results.
Again, these are they are the early version of the RCA 12AX7A, aka 7025 ... you don't see A's- this old ... pretty darn rare ... if you're collecting or planning to use in your old Fender or hifi amp that calls for the low noise ECC83 / 12Ax7A / 7025 --- here you go... probably the earliest & best matching set you'll see on here for a very long time - hefty grey ribbed plates and 1x top halo and super thick mirror flashing . With closely matched ip & mhos & dates -- you just don't see'em like this very often. Study the included tube test results in photos and you'll see just how nicely fussed over, clean and well tested these originals are!
If you're currently a user of modern tubes then these will make a world of difference in your sound — a real upgrade and a treat for your ears -- clean, clear and more overall detail you can really hear.
- They are the real McCoy / about 50 years old!! -- and will sell very quickly !
Buy Now to avoid a bidder’s war.
Check my 100% feedback (check over what buyers have to say ... they love these vintage US tubes and I get allot of repeat customers ) ...always fast shipping, and always safe double box packing !!
100% happiness assured on all tubes and old audio items. Guaranteed NO DOA.
