Dec 17, 2017 · The difference between a 12ax7 and a 12ax7a has to do with the way the heaters are wired. The 12ax7 can only be used in circuits where the heater circuit is wired in parallel, …

Jun 5, 2021 · Next, the expensive Mullard 12AX7 long plate is also very low distortion and can be a little polite, perhaps a little dark sounding, but ultra clear sounding. If your amp is a bit …

Aug 23, 2021 · I like the JJ. 12AX7 and 12AT7. I use the 12ax7 in my headphone amp and the AT7 in a preamp. I should say have used the AT7.... its a spare, it was replaced by a Mullard …

Jul 20, 2012 · I was researching vintage 12AX7 tubes, and a pattern emerged - over a variety of brands and countries of origin, "long plates" are more highly sought after and command a …

Aug 3, 2018 · The Mullard 12AX7 long plate square getter is the best I ever heard. Seller stated Telefunken 803s are not as good at $1K+ each. A tube I thought is better than the 3rd place …

Jan 1, 2019 · -3 sets of Matsushita 12AX7/12AU7-2 sets of Hitachi 7025/12AX7/12AU7-2 sets of TJ Full Music 12AX7/12AU7-1 set of RFT ECC83 plus 5 RFT 12AU7 (the RFT 12AX7/12AU7 …

Dec 15, 2020 · had a psvane 12ax7 t mk 2 in my Croft.To my ears ,the gold lion ,and the jj gold pin 12ax7 were better.But im using a Telefunken ecc83 now,and this works better than all for …

Feb 16, 2024 · In the end your wallet will be lighter, and the overall improvement compared the newer Russian made Genalex Gold Lion Gold Pin B759/ECC83/12AX7's will be a …

Jun 5, 2021 · Frankly, buy NOS GE 12AX7/7025 short plate for about $80 a pair (Brent Jessee) and never look back. GE 12AX7 without the 7025 are not likely the same tubes and definitely …

Sep 17, 2007 · There is a huge difference in gain (amplification factor) between the 12AX7/12AU7. The 12AX7 has approx. 5 times the gain of a 12AU7, therefore your choices …