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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Tube/valve ECC82 = 12AU7 RFT
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Use of special-quality versions outside of the purpose they were designed for may not be optimal; for example, a version for digital computers may be designed for long life without cathode poisoning when mostly switched to low-current mode in switching applications, but with little attention to parameters of interest only for linear applications such as linearity of transfer characteristic, matching between the two sections, microphonyetc.
Price is for 2 NOS and tested valves. Previous Page Next Page Home.
Anonymous December 4, at 8: Prices are still low with this kind of tubes. Boy, are they NOS, with shiny straight pins.
Retrieved from ” https: This page was last edited on 13 Decemberat They have nearly no noise and zero microphonics. Vacuum tubes Guitar amplification tubes.
These tubes do have a unique sound of their own not heard elsewhere in ECC82 family tube type. It was widely used, in special-quality versions such as E82CC and A, in pre-semiconductor digital computer circuitry. But the product, the testing, the price and the service were all first rate. The midrange is ruler flat, and the bass is tight and accur This page was last updated: Ordered one day with express shipment option and delivered in Spain next day.
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ECC82-RFT / E.Germany NOS
Great valve for little marshall 1 watt amplifer power stage,cheap and professionally packed and shipped! Double triodes ecc28 the 12AU7 family have a center-tapped filament for use in either 6. Clear low noise tubes! Koray is great, I do not buy frequently and he still spends time answering my email in details.
These are quality tubes on budget and come screened for noise and microphonics!! Number of bids and bid amounts may be slightly out of date.
They happen to sound great in their use, but of course, that’s subjective and shouldn’t be of too much interest to you.
This is the best version of the series triodes designed specifically for sound amplification. The 12AU7 and its variants are a miniature nine-pin Eccc82 base medium-gain dual triode vacuum tube. Koray is great to deal with, and obviously cares about his customers.
Views Read Edit View history. The tube is popular in hi-fi vacuum ecv82 audio as a low-noise line amplifier, driver especially for tone stacksand phase-inverter in vacuum tube push—pull amplifier circuits. Anonymous December 3, at 2: Price is for 2 tubes in seemingly little used. This tubes were tested on high end Russian military tube tester Rfg by a qualified eng Construction is quite rare – with strengthen supports gray plates and single O-shaped halo getter. Their sounding is great and is especially good for guitar amplifiers because From Wikipedia, the free encyclopedia.
NOS for sure, no doubt. Construction of the right is quite rare – with dual stregthen supports, gray plates and single s