Oct 11, 2024 · Calling for your great experience to help me identify these tubes that I came across recently. Mullard old logo "Made in Great Britain" 12AU7 ECC82, but not much more info. The …

In this article, we embark on a journey to unveil the finest 12AU7 ever made, delving into the timeless craftsmanship and mesmerizing soundscapes offered by these esteemed …

Feb 12, 2025 · check out my user profile in my system pictures i have a handy chart for small NOS 12XXX tube types with sound characteristics. its relivent for all of the 12xxx series tubes. …

Nov 17, 2024 · I was talking about the first photo, nothing on the tube nor in the description of the photo. Yet the heading states 12AU7 tubes, yet there is a photo of a 5751 in the next set of …

Aug 31, 2008 · Here is a mini review of 12AUs7 that I have tried: • Mullard 12AU7 (Blackburn factory): very nice mid range but rolled off on the high frequencies. • RCA 12AU7 (Cleartop): …

Apr 4, 2011 · 12AU7's make fantastic PI's and cathode followers. Capable of driving a very low impedance. They make a sweet clean gain stage when looking for only a gain of 10.

Jun 15, 2012 · I have a Hagerman Cornet2 phono preamp (tubed) in an otherwise all solid state system. I have a number of NOS 12AU7 and 12AX7 tubes that I roll: My Amperex Bugle Boys …

Oct 1, 2010 · I'm taking a shot at a mini stereo amp. Per-channel it uses 2 dual triodes to make the PI (12AX7) and output (12AU7) stages. I'm using a cheap $5 PA matching transformer for …

Mar 14, 2009 · If it was 12AU7 made in Holland's Philips factory (Heerlen), it's good - even the 1970ish versions, but of course I like the earlier versions the best: the 17MM longplate D …

The 12AU7 is a double triode with separate cathodes. An amplification factor of 17 is quoted. The 6C4 is half of the 12AU7. Unlike our other 12AU7 exhibits this envelope is very rounded at the …