Sequentially MATCHED DATE CODE pair of 1960's, early production RCA 12AX7A / 7025 / ECC83 type. Perfect originals to upgrade any spot you have calling for 12AX7 or (A), or 7025 / ECC83.
Exhibit B, shows an actual tube under test, dynamic emissions at full load for easy reference. All (2) tubes / all (4) sides read STRONG 110% or more.
They test (and sound) strong, quiet and were current matched (balanced plates) on a 2nd lab tester at full plate 250V.
In original RCA boxes where they've been stored carefully for years. Very old tubes, very low hours , they have lots of life left -- from early HiFi estate. Just throughly checked using multiple testers and played with music. Working well; quiet and matched, detailed and sounding great! Guaranteed no problems. See my detailed, 100% feedback.
These are the real McCoy. The most throughly tested, closest matching PAIR you will see anywhere! Very hard to find gems like this --- they will sell very quickly (last ones sold within 12hrs!).
Because, dealers all over can no longer find them. These are the early RCA's, and they haven't been made for nearly 50 years. For guitar amps -- they are some of the very best tubes you can use ... this PAIR; is totally matched, right down to the DATE CODES, CM -- which is June, 1969. Plates are incrediblely close, strong functioning at full operating 250 volts eP -- .. they're are also all very close dates of production (see exhibit C&D for all info). This era kicked off the start of the 15mm low noise plate design ... They're the very earliest version of the 12Ax7A/7025 .. all (4). The 1960s encompassed RCA's first generation of the 7025 -- late 50s/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. One tubes has worn ink letters, they really present beatifully and have etched RCA letters in glass.. 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 A,C,D,E below for date codes and exacting test results.
Again, this is the super cool early version of the RCA 12AX7A, aka 7025 ... you don't see A's ---- this incredibly nice ... pretty darn rare ... if you're collecting or planning to use in your old Fender or hifi amp or preamp -- and it calls for the low noise (or plain vanilla 12Ax7) 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.
These are the real thing made in USA ... from the very early 1960's! They sound wonderful 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, who don't hesitate) ...always fast shipping, and always super safe double box packing !!
100% happiness assured on all tubes and old audio items. Guaranteed NO DOA.
