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This is the best Russian tube IMHO. But it does cost around $100.. But well worth it. Great soundstage, pressences and body!!
These tubes are not true 1578s. The plate structure is all wrong. The true 1578 is a good tube, comparable to many of the very good sSN7GTs, but it can be microphonic, so watch it, especially if you are buying from the Ukrane. As a driver tube, or as an input tube in some circuits in power amps, microphonics is not really a problem unless you are given to tapping the top of the tube while you play the music.Are non-EH Russian (and non true 1578s) 6SN7s any good? If you are using the tube just for gain in some circuits, the sonics won't matter. But you have to know the circuit to be sure. These tubes don't sound very good as input tubes in some circuits where their sonics do matter. It's really hard to generalize when you can actually hear a tube and when you are just hearing (or not) its electrical properties---which is also a bit of a muddled statement. By a couple and find out how it works in your amp.But don't pay $200 + for a pair of non true 1578.
Apparently, the only thing absolute around here is that certainty that you know it all, whether it be tube quality, any and all signal or power cables, solid state amps, whatever.... I admire your certainty, though I really think it ill founded.I use New Sensor tubes and am quite pleased with them. Their EH 6922 are excellent and pretty much bullet proof, as are their 12ax7lps. Their Mullard and Tung-Sol 'tribute' tubes and are lovely. But I can't speak specifically to their 6SN7s.I believe both of our families came from Russia, mine a couple of generations prior. Hopefully, your children will loose that reflexive hostility.FWIW,Paul
Many thanks for your input.My experience of Russian tubes so far are minimal. I had 6N1P and 60's 6SN7. I tried 6N1P to replace 6N1 (Chinese made), but it did not work out well, not because 6N1P was bad, but because they are not direct exchangeable.60's 6SN7 was pretty good. It sound better than Sylvania GTA/GTB in my Rogue 99 preamp. However, they had some microphonic noise after a while.I just ordered NOS 8x6SN7 (80's production from Novosibirsk factory) and 8x6C33C-B from Russia. I only paid $155 with shipping, and I will see how good they are in about 3 weeks. BAT sells 6C33C-B at $125 each, so even if only half of them work reliably, I should be still OK.I have a bunch of Sylvania GTA/GTB tubes, and will see how crappy those Russian tubes are, if they work at all.
Sorry for bringing up this old topic. dinaudia's comment attracted my attention.I'm looking for 6n1 tubes. As I understand from dinaudio's experience, although 6n1 and 6n1p are similar, they are not identical nor direct replacements.I opened a topic on this question. The replies in this topic didn't exactly answered my "6n1 ?= 6n1p" question.Finally I'm able to get both 6n1 and 6n1p tubes. I need to hear some more experience on whether 6n1p can be safely used in place of 6n1 .
Lots of people like the modern Tung Sol 6SN7, even more than the EH.
I see many of 6SN7 tubes from Russia sold at less than $5 each. How good/bad are they?
I like the Electroharmonix 6SN7 just fine. I understand the EH gold version just comes with gold-plated tube pins. These are builty very robustly and sound quite straight-forward, and depending on where, I have at times preferred them to the likes of KenRad black glass or Sylvania "Bad Boys."
Can anyone recommend a reliable source for a pair of the legendary Hole Plate Metal Base MELZ Russia 1578 6SN7 6H8C tubes?Seems like they are pretty scarce with imposters being sold.
