The 12AU7 and its variants are a miniature nine-pin (B9A base) medium-gain dual triode vacuum tube. It belongs to a large family of dual triode vacuum tubes which share the same pinout (RETMA 9A). 12AU7 is also known in Europe under its Mullard–Philips tube designation ECC RFT “thin-plate” ECC82 variant ( left), RCA 12AU7A variant (right), Hitachi. 12AU7 = ECC82 RFT Super quality 12AU7 made by the German factory RFT. Excellent performance in both hi-fi and musical instrument applications. The German made RFT 12AU7 is considered to be one of the better sounding European tubes you can find. It ranks up there with the RCA 12AU7 clear top.

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Get yours now before they’re all gone. Price is for 2 NOS and tested valves.

12AU7 – Wikipedia

Compared to my reference RCA clear top, I can live happily with both. Views Read Edit View history. This is the best version of the series triodes designed specifically for sound efc82. This page is being bookmarked! Double triodes of the 12AU7 family have a center-tapped filament for use in either 6. These tubes do have a unique sound of their own not heard elsewhere in ECC82 family tube type. Anonymous May 1, at These German tubes are usually characterized by an impressive open “air” at the top end.


This type of tubes are low noise and low microphonic preamp made.

The midrange is ruler flat, and the bass is tight and accur They are carefully matched from few pcs boxes, more details about testing procedure on my site. By using this site, you agree to the Terms of Use and Privacy Policy. NOS for sure, no doubt. They happen to sound great in their use, but of course, that’s subjective and shouldn’t be of too much interest to you.

Anonymous December 4, at 8: Premium Audio Vacuum Tube. All kinds of matching available. These are quality tubes on budget and come screened for noise and microphonics!!

Tube/valve ECC82 = 12AU7 RFT

Superb tube and superb service as ever from Koray. Pages using deprecated image syntax Articles containing potentially dated statements from All articles containing potentially dated statements. In other projects Wikimedia Commons. Their sounding is great and is especially good for guitar amplifiers because Construction of the right is quite rare – with dual stregthen supports, gray plates and single s Boy, are they NOS, with shiny straight pins.


We are really impressed with these tubes. Great valve for little marshall 1 watt amplifer power stage,cheap and professionally packed and shipped!

ECC82-RFT / E.Germany NOS

Vacuum tubes Guitar amplification tubes. Prices are still low with this kind of tubes.

Price is for 2 NOS, new. Surprisingly this tube has a wide and deep stage! This tubes were tested on high end Russian military tube tester L by a qualified eng Koray is great to deal with, and obviously cares about his customers.

The efc82 is popular in hi-fi vacuum tube audio as a low-noise line amplifier, driver especially for tone stacksand phase-inverter in vacuum tube push—pull amplifier circuits. Languages Polski Edit links.