Originally Posted by mordy
Pictures are always welcome.
I must say that I find it a little hard to keep up with you guys and all the new stuff you are trying, and I also find it difficult to keep up with the alphabet soup and numbers of all the different tubes.
First, I would like to hear a consensus and ranking about which tubes are the best sounding (as AFB did in the past). Then, after each tube, a line with the settings required. An example would be like this:
1)Super Duper 6ABCDEFGWA EF95 setting with pins 2&7 strapped
2)Electron Fabulosi 3995 EF92 setting with pins 5&6 snipped off
3)Unobtanium 4892i EF91 setting with liquid cooling
The tube names are all a joke, of course, but it would be nice to have a little chart to go by. I am still working on the mirror image pin numbering....Let's see, if I look down on the empty socket of the LD driver tube, the top left is #7, but if I look at a tube with the pins facing me, and the bigger gap on the left, the bottom left is #7.
Did I get it right?
I think I had a picture of the sockets a few pages back (probably 15 by now, but it's on my profile I think) with showed pins 2 & 7 socket strapped. I still use that picture as an absolute reference when I have a doubt, so I don't make a mistake. Once you've strapped a few tubes at the socket level, and snapped some pins of another couple of tubes, you'll start to know pretty instinctively what you're doing. When in doubt, I also often check to see which pins go to the heater (usually pins 3 & 4, at least on all the "compatible" tubes I've tried) in a tube -which you can usually pretty easily see- that way i can know for sure what pins are where from there.
I could try to make a quick list, but I just don't have that much time and may not be able to update it often, which in turn could be risky for people using it that haven't been around long enough... But right now, there are only so many new non-native types, it is still easy:
- 6CB6 / 6CJ6 / 6676 -> EF92 jumper (or strap pins 2 & 7 at the socket level (wire mod))
- 6DK6 / 8136 -> EF92 jumper (or strap pins 2 & 7 at the socket level (wire mod))
- 6GM6 -> EF92 jumper (or strap pins 2 & 7 at the socket level (wire mod))
- 6EW6 -> EF92 jumper (or strap pins 2 & 7 at the socket level (wire mod))
- 6GY6 / 6GX6 - EF92 jumper (or strap pins 2 & 7 at the socket level (wire mod))
- 6AG5(WA) / 6J3P(-E) / 6BC5 / 6CE5 / EF96 / 6186 -> EF95 jumper
- 6AU6(A/WA/WB/WC) / 6136 / 8425A / EF94 -> EF95 jumper + strap pins 2 & 7 at the socket level (wire mod)
- 6AH6(WA) / 6485 -> EF95 jumper + strap pins 2 & 7 at the socket level (wire mod)
- 6J4 / 8532(W) -> EF92 jumper + snap off pins 5 & 6 (snap & tape (?) mod -do make sure you tape over the leftover stubs so you don't electrocute yourself or make your amp explode, think of the children)
Don't hesitate to copy and paste this and improve it, I just threw this together as a temporary list... I still thoroughly recommend to go back 10-30 pages and read over whole sections when in doubt, as everything is written there quite precisely and without that much spam between messages, and it's still the best way to avoid mistakes. Like someone mentioned a while back, we've succeeded in keeping this thread polite and clean, and therefore fairly convenient to read over lol.
Edit: With little doubt, my current tube order is (I'll limit myself to the top A+++ tubes): Tung-Sol 6485, GE 6485, Valvo/Mullard EF94, "the brand new 6J4 triodes" (to be confirmed obviously, but my French 6J4S and the Sylvania 8532W gibosi tested are an extremely good start)
Quoting and editing myself from page 60 for the rest:
1 (A++) - GE 8425A/6AU6A (check with gibosi for the other best 6AU6 like the Sylvanias which I haven't tested)
2 (A+) - GEC CV4014
3 (A or A+ depending on headphone impedance) - Mullard CV4015
4 (A) - GE 6GM6, 6EW6, 6GX6/6GY6
5 (A- to B+) - GE 8136, 6CB6A, Mullard CV4014/M8083 (Mitcham), Tung Sol 6AJ5, Mullard CV4010/M8100, Voskhod 6J1P-EV (Gold grids), Mullard CV5377 (Mitcham), Mullard CV4014 (Whyteleafe)
6 (B to C+) - Brimar CV4014, Mullard CV138/6AM6, Voskhod 6J1P-EV (Non-gold grids), Brimar CV138, Mullard CV850 (Whyteleafe), Tung Sol 6AK5 (side getter, early shape, 1943), GE JAN 5654W
That's about all I can give you at this point, which should sum up quite a bit of information I think. Again, the detailed reviews and pics are all in the last few dozen pages with the right keywords to search for (even I keep getting lost here looking for information we posted like... 3 weeks ago...).
Edit 2: use tape with 6J4 pins you snap off
Edit 3: all non-LD-compliant (non EF92/91) tubes that work with the EF92 jumpers, also work just as well with the pin 2 & 7 wire mod at the socket level.
Edited by Audiofanboy - 4/18/13 at 1:34pm