Mar 272010
 

I’m a big fan of the New Old Stock Russian 6n3cE vacuum tubes and have been using them in my Leben CS-600 integrated amplifier and Leben CS-660P power amplifier since I bought them several years ago. The 6n3cE is all about tone, color, musicality, and is very evenly balanced top to bottom frequency wise. It also has great  detail recovery, and imaging & soundstaging properties as a bonus. I have found the 6n3cE to be very rugged as well and thequad in my Leben CS-600 have shown no signs of deterioration after continuous use since I installed them in December of 2006, and if anything they’ve just improved sonically over time.

Those of you who frequent the Tube Asylum know all about Jim McShane being one of the true-blue good guys of audio. Jim is known for the magic he works on Citation amplifiers and the great selection of quality vacuum tubes that he offers through his website.

Jim currently has the 6n3cE tubes in stock. Single tubes are $11.75, matched pairs are $24.50, and matched quads are $49.50. That’s an incredible bargain for such a fine tube, so if you can use this 6L6 type tubes I recommend you give them a whirl – you will not be sorry. They will work as a direct substitute in most amps that can use 6L6GC, KT66, KT88, 350B, and so forth. If you’re unsure if they will work in your amp run it by Jim for a recommendation.

Jim carefully inspects the 6n3cE tubes for damage or construction issues, cleans the tube pins with a wire brush and wipes them down with Caig DeOxit. Jim tests the tubes both before and after matching for shorts and gas/grid current, and matches them for cathode current and transconductance to the same standards he uses for the 6L6GC. Jim also applies a matching label to the box so you can see the matching specs.

Tell Jim that Jeff sent you!

Jim’s website: http://www.mcshanedesign.net/tubes.htm

Jim’s e-mail addy: jimmcshane@prodigy.net

 Posted by at 12:20 pm

  67 Responses to “6n3cE Vacuum Tubes”

  1. Hi Jeff,
    Thanks for your music lovers reviews of all audio systems.
    Great idea to have created your blogg
    My brother and I have the leben CS 300X, CS 600 and CS 660P.
    We would be interested to order those marvelous 6n3cE.
    Could you tell us which of those Leben amplifiers have an “autobias” system?
    Thanks in advance for your response
    Warm regards
    Alain

    • Hi Alain,

      Thanks for the kind words – appreciated. The CS300X, CS600, and CS660P are all autobias, but only CS600 and CS660P can use the 6n3ce tubes. To use the 6n3ce set the internal switches the same as you would for 5881 tubes and you’ll be in good shape. Enjoy!

      Best,

      Jeff

  2. These look exactly the same as the Sovtek 5881 tube, also made in russia:

    http://www.hotroxuk.com/sovtek-br-5881-wgc-6l6-10733-0.html

    Same tube perhaps???

    - John

  3. Hi John,

    You are correct they do look very similar, perhaps even identical. However, they don’t sound the same. I recommend you go out to Audio Asylum and do a search on ’6n3ce’ and you’ll find a lot of discussion on this topic. Here’s a link to one very passionate post on the topic:

    http://db.audioasylum.com/cgi/m.mpl?forum=tubes&n=227650&highlight=6n3ce&r=

    Thanks for writing!

    Jeff

  4. Thanks for that link Jeff – very interesting indeed!

    On the strength of your review I got a quad of these tubes from Jim McShane, and am very pleased with them running in my VTA board Dynaco ST70. Biased at 0.45v each they sound fantastic! Thanks so much for your reviews which led me to buying these tubes :D

    - John

    • Hey John,

      Just wait, they keep getting better and better with time. :-) I really have been happy with them too, and am using them in both my Leben CS660P and CS600 amplifiers. They’re the best tubes I’ve run across for my Leben amps, with the bonus being they’re inexpensive. This is one of those increasingly rare examples where you get even more than you pay for.

      Have fun!

      Jeff

  5. Hi Jeff,
    First thank you for your relevant review on the hifi and the wonderfull nos tubes 6n3cE we bought from Jim.
    Could you tell me the very precise position of the switches for the 5881 as well as the 6n3cE lamps on Leben CS660P? Because I don’t quite understand the specific table and I am afraid to make a mistake.
    I have already tested this tubes on the Leben 600. Terrific!

    Best regards,

    Sylvain

    Sylvain Poss

    • Hi Sylvain,

      I’m glad you’re enjoying the 6n3cE tubes, they have become my favorite in the Leben CS600 and CS660P. The tables are confusing to read, and I think what I should do is take a photograph for the switch positions for each tube type, and then post that, as it would be a lot easier to interpret. I’ll try to do that before long. For the time being I’ll post a photo with the tube settings table of the positions of the switches on the back of my CS660P for the 6n3cE. I have both of the selector switches in the up position like you would for 5881 tubes, and that has been working very nicely.

      Kind regards,

      Jeff

    • Hi Jeff,

      Many thanks for your answer. Indeed, the tables are confusing to read and I would be happy to look at the picture you will post. In the meantime, I have one more question : you say that the selector switches are both up when the table for the CS 600P seems to indicate that both are down (one cross in the column “down” and one asterisk (also applicable) in the other column “down”). Have you got some explanation to solve this puzzling mystery ?
      Kind regards,

      Sylvain

    • Hi Jeff,

      I have made a little mistake in my last message : you have to read CS 660 P and not CS 600 P.
      Regards,
      Sylvain

      • Hi Sylvain,

        It is my understanding from the nice folks at Leben (that’s where the table comes from) that for the CS660P table the ‘O’ indicates the correct position of the switches for a particular tube type. So if you look in the left column for 5881 and follow the ‘O’ up the column to the key at the top of the column it indicates that the position of the selector switch for the cathode resistor is in the ‘up’ position, and the indicator light is red. Likewise, the ‘O’ for the plate voltage switch for the 5881 is in the ‘up’ position, with the indicator light red. Does that help? You’re correct though, the table is confusing, it would have been better to leave the X’s off the table to make it more obvious what the tube position being indicated is.

        Best,

        Jeff

      • Hi Sylvain,

        After posting the comment above, just to be sure that there was not a misunderstanding in one of my earlier communications with Leben about the correct position of the CS660P switches in the table, I have asked Yoshi who exports Leben products to clarify, as the table (taken from the Leben website) does not provide a key that is completely clear.

        As soon as Yoshi responds to my e-mail inquiry I’ll post the information and add it as an update to the post about the table.

        Thanks for asking the question.

        Best,

        Jeff

      • Hi Sylvain,

        I just received confirmation from Yoshi San that what I posted in my first response to your question was correct: The ‘O’ indicates the correct position of the switches for a particular tube type. So if you look in the left column for 5881 and follow the ‘O’ up the column to the key at the top of the column it indicates that the position of the selector switch for the cathode resistor is in the ‘up’ position, and the indicator light is red. Likewise, the ‘O’ for the plate voltage switch for the 5881 is in the ‘up’ position, with the indicator light red.

        I hope that explains it better.

        Kind regards,

        Jeff

        • Dear Jeff,

          Thank you again for taking the problem as something close to your heart. Your expertise and passion for music combined with M.Hyodo’s talent are such that music has become magnificient….I experience it on a daily basis with my Tannoy-Kensington and Proac 3.5 loudspeakers. I’m constantly in heaven thanks to you.

          Regards

          Sylvain

          • Hi Sylvain,

            Thank you for your kind words, I do very much appreciate it.

            I’m glad you asked about the table, it really helped clarify the position of the switches for the various tube types. Before too much time goes by, I will develop new tables that are much easier to interpret and post them for all of us Leben fans.

            You’ve got some wonderful systems, they will provide many years of heavenly listening sessions! :-)

            Kind regards,

            Jeff

          • Hi Jeff,

            I think that it’s a very good idea to develop new tables since some importers still give wrong information regarding the switch position.

            I wish you the best

            Kind regards

            Sylvain

  6. Thanks to you and Jim I now have a matched quad of these beauties in my McIntosh MC30s. My amps have never sounded better. Listening to Janos Starker perform Kodaly was transcendent with these tubes — the music sounded like it was lit from within. Thanks again for introducing me to these tubes.

  7. Hello Jeff,

    Being a happy owner of Leben CS660p amplifier I would like to try either Tungsol 6L6G reissue or Harma 5881 cyro (same as Russian 6N3C tube I suppose)tubes.
    Could you please share your opinion comparing their pro and cons with me,so far I have used Shuguang KT66,Gold Lion KT66,JJ KT66,,Valveart KT66 tubes and currently I use valve arts.
    Thanks in advance
    Ben

    • Hi Ben,

      Both the Tungsol 6L6G reissue and 6n3ce tubes work well in the CS660P, but when it comes right down to it the 6n3cE is just in a different class of performance than the Tungsol. Really, the only pro for the Tungsol is its appearance – I love the way it looks with the ST shaped bottles. From a musical and sonic aspect the 6n3cE is considerably better. I believe that the 6n3cE is the best tube available today for the CS660P, and I really wouldn’t spend any money on anything else until you’ve tried them. An unexpected bonus is that they’re the least expensive as well.

      Kind regards,

      Jeff

      • I really thank you for your explanation, I just need your clarification that 6n3ce tubes are exactly same as
        Harma 5881 cyro tubes?,I could only find Harma 5881 source for 6n3ce tubes (there are not much links for 6n3ce tubes at Google
        Thanks
        Ben

        • Hi Ben,

          The Harma cryo 5881 tubes that I bought from Watford had 6n3cE stamped right on the glass, so unless they’ve changed the source tubes for the Harma 5881 line they should still be the same. You might send Watford an e-mail and ask for confirmation to be sure.

          What I would recommend is that you contact Jim McShane as I mentioned in the article above, as he doesn’t do any relabeling and such like Watford does, so you can be assured you’re getting the correct tubes.

          I hope that helps.

          Best,

          Jeff

  8. Dear Jeff,
    You have championed quite a few of my audio buying, the Leben being one amongst many others. My 6n3cE is now fully blooming on my CS660P. Agree that the stock KT66 is bettered by this cheap and wonderful tube.

    FYi i bought mine from thetubestore.com, directly from Russia. The price there is 1/2 of the US price, hence i have 2 quad and yet to match them myself….Yes buying from JMshane saves that trouble…(But he was out of these tubes and a friend pointed me to that site..).

    Thanks again and please keep on the treasure hunt for the rest of us.

    • Hi Karma,

      The 6n3ce really are terrific tubes, and it’s good to know there are some other inexpensive sources for them out there.

      One tube that I’d really like to see some one make is a high quality 350B. The Valve Art 350B is only so-so, and not as good as the 6n3ce, but beautiful to look at with its ST shape glass envelope. I’ve been told that the original Western Electric 350B is magic, but I haven’t heard them myself, and probably will never hear them given a quad goes for around $2500 if you can even find them.

      Thanks for the report back on the 6n3ce!

      Kind regards,

      Jeff

  9. Hello Jeff,

    I also thank you for your recommandation about 6n3ce tubes they are really better than many other types I have tried,
    I may help you about small but very effective trick for the 660p amplifier, there is an alps pot in it as you know,if you solder
    + and – wires ends to each other (bypassing the pot) leaving ground wire at the pot as original position (to be able to obtain 100 kohm chassis impedance)you will get much transparency and openness so that you do not use twice blocker at the signal path
    (you already have one at the preamplifier)it worked in my setup and may work fork for you too and it is so easy to bring it back to the original form (only two solder) if you do not like (I had asked to Mr.Hontani before I attempt to this trick and he had lead how I would do it drawing the pot and wires and informing the ground wire must be untouched)
    Thanks

    • Howdy Ben,

      Thanks for the tip on the volume pot, I’m going to give it a try! :-)

      I’ll report back on the results.

      Best,

      Jeff

  10. Hey Jeff
    Thanks to getting back to me on my last post.

    Could you tell me if these tubes are the same, as the ones you mentioned earlier in this blog.

    http://www.gstube.com/catalog/?key=New+Old+Stock+Russian+6n3cE+vacuum&submit=+GO+

    Thanks

    Rasmus

    • Hi Rasmus,

      That does appear to be the same tube. I’m not familiar with the vendor though, so can’t vouch for their QA/QC processes like I can for Watford Valves or Jim McShane.

      Best,

      Jeff

  11. Dear Jeff

    Kia ora from across the Pacific

    I really must write to thank you for this tube recommendation and for putting me on to Jim McShane. One could expend a lot of words comparing the sound to the original Sovteks in the CS600, but hey, you know already! They have the clarity of EL34′s in the upper mid’s but the firmer hand of the 6L6′s in the bass. Just lovely!

    Thanks also for your reviews and comments – your enthusiasm is appreciated.

    Warm regards

    Rick (Auckland, Aotearoa)

    • Hi Rick,

      I’m glad that you’re enjoying the tubes in the CS600 – they are a great match to the CS600 – and Jim is a great guy to buy tubes from.

      Thanks for kind words and stopping by!

      Kind regards,

      Jeff

  12. Wow, this is going to sound a lot like the previous comment:

    Thank you very much for the tip on the 6N3CE/6P3S-E tubes. I know there’s been a buzz on these for a while but your review of the current production KT66′s got me where I live. When you put the 6N3CE back in and pronounced them far better I knew had to give them a try so I ordered two matched pair from the Tube Meister – Jim McShane. My Quicksilver Audio Mini-Mite Mono amps can use a wide variety of output tubes. I have tried about 8 different makes/types with varying sounds/results. The old stock Tesla that Mike Sanders of Quicksilver designed the amp with are quite good but somewhat “flat” sounding. I also liked the Valve Art KT66 – actually more than the Tesla overall.

    When I’d put at least 100 hours on the 6P3S-E I did a comparison (A/B) with the VA KT66 – my most recent fave. The VA KT66 does has a bigger sounding bottom end, but it’s rather “wooly” or tubey, if you will – fat. The Russian tubes are all around better – more dimensional, more detailed, “tighter” AND more “musical.”

    Again, thanks for the VERY useful information. My audio system sounds much the better for it.

    Best Regards,
    Doak

    • Howdy Doak,

      Thanks for the great post with lots of good information. Those 6N3CE/6P3S-E tubes really are terrific, and you can’t beat the price!

      I love the Quicksilver amplifiers by Mike Sanders. My first vacuum tube amplifier – many years ago now – was the Quicksilver KT88 that I bought used as a college student. Selling those amps ranks as one of my all time dumbest audio blunders. Someday I’m going to have to check out some of Mike’s latest offerings, I’ll bet they are wonderful!

      Thanks for stopping by and be sure to let me know about any cool discoveries you make along the way!

      Kind regards,

      Jeff

  13. Hey Jeff

    I recently purchased 4 pieces of 6N3CE tubes from Russia via gstube.com they have been installed in my cs-600 and it seems to do the job very well.
    I can recommend the tube store gstube.com

    All the best

    Rasmus
    (Denmark)

    • Hi Rasmus,

      Those 6n3ce tubes really are something special, I’m glad you’re enjoying them.

      Many thanks for stopping by and the tip on the web site.

      Kind regards,

      Jeff

  14. Rasmus
    I got 2 quad from them earlier too, they were not matched. After checking, realized that the plate current Were indeed all over the place. For what it is worth, Jim Mcshane takes care of these issue. What is this worth?

  15. Hello Jeff

    I own both a Leben cs-600 and the leben riia. I have a problem with a lot of humm noise, it is only on the input where I have the riia on.
    Do you have or anybody else have any idea, what to do?????

    Rasmus

    • Hey Rasmus,

      I’m sorry to hear you’re having a problem with hum, that can be really frustrating.

      Just to be clear, is your phono stage the RS30EQ as Greg mentions below? This is the first I’ve heard of any hum issues, and my RS30EQ is dead quiet even on my Westminsters, so I’m surprised to hear this.

      I’m wondering if you an interconnect shorting out … have you tried a different set of interconnects? Also, tell me a little more about your cartridge and step-up transformer, whether you’re using the ground, and maybe we can figure out what’s going on with it.

      Kind regards,

      Jeff

  16. Hi
    Have you connected the ground cable from the turntable ?

    • Hi

      The UK distributer told me they’d had a lot of problems with hum from the Leben RS30-EQ RIAA stage, but I wasn’t sure whether to believe it after all the good reviews. Maybe some careful, specific setup procedure is required. Can Jeff or others enlighten us?

  17. Hello

    It is the RS30-EQ riia from Leben i am using, I have a Grado platinum cartridge on my turntable. I have grounded the whole setup. The hum is constantly but gets much worse, when I swing the pickup arm in over the record.
    So I think it could be a ground problem???

    Sorry for my english.

    Thanks

    Rasmus

    • Grados have been known to hum on Regas, so it may be the same with the VPI? I have a Grado Platinum coming from Soundsmith soon, so I will see if I have the same issue.

  18. Hi Jeff,

    I am a new happy owner of the CS600. I am now in contact with Jim to source some 6n3cE. Can I ask which tube are you using for pre stage? Which tube gave you the biggest different Pre/Pow?

    thanks,

    Tai

    • Hi Tai,

      Congratulations on the CS600 – it is a wonderful amplifier! My favorite pre stage tube so far is the NOS Sylvania 6CS7, but I haven’t tried a lot of different 6CS7s. The Sylvania has a sweetness about it that I really find compelling. The NOS Tung Sol are really good too, and they are more detailed and transparent sounding. The TS take a long time to break in, but it’s worth the wait.

      Kind regards,

      Jeff

  19. Hi Jeff! I make a query: I recently acquired a beautiful amplifier Leben CS-600 and I’m very happy. I’m using it with Dynaudio 1.3se and incredible transparency of sound, the highs are very fine and is very attached to the underside and this is the point I would like to correct: I’m using 6L6.
    What would be the changes using el-34 Mullard / Telefunken or phillips?
    I try the Leben CS-600 with vintage JBL L-65 to see if there is synergy, then I tell you the experience, I appreciate your response and I salute you
    Remo
    ps sorry for my rudimentary English!

    • Hey Remo,

      I think each of the tubes you mention will be a lot of fun to listen to. I haven’t listened to them, but the CS600 is so fun to experiment with. Given with what I’ve heard from other Mullards I suspect they would give you a rich, musical, sound that would be spellbinding. Be sure to post your impressions on any of them you try!

      Kind regards,

      Jeff

  20. Another good source for 6n3cEs, plus they give them a Cryogenic treatment:

    http://www.cryoset.com/catalog/index.php

  21. Hello Jeff
    add to my previous comment: I tested the Leben CS600 with vintage JBL L-65 and the result is wonderful!
    What character has the valve, you can listen to any style of music: Schubert, Wagner, Stravinsky, Varese and Zappa with the same quality. It really is a gem Japanese hope to enjoy many years!
    A big hello
    Remo

    • Hi Remo,

      That’s awesome! Man, I love my Leben CS600. It’s never going anywhere! Those vintage JBLs sound like they’d be a lot of fun – way cool!

      Kind regards,

      Jeff

  22. Hi Jeff!
    I recently built a pair of Proac Response 1sc for use with the Leben CS-600 and the result is fantastic: the sound is crystal clear, the voices sound fantastic (disk sinatra & jobim: wow !!! ), the ability to detail is very great. It’s amazing that these “Flea Sound” can sound so well throughout the range of tones. I read in many websites on the good relations between Leben and Proac and I checked for myself. I had a valvular Primaluna and did not sound even remotely as limpid, detailed and transparent as the Leben CS-600 !
    My next test will be with The-34 tubes to see what happens. I send a big hello
    Remo

    • Hi Remo,

      I really loved the ProAc Response 2.5 I had, they were a really nice speaker. I’ve heard really positive comments about the Leben and ProAc combination, so I am glad to hear that you’ve had good results as well. I heard the Response 1SC some years ago, and I was really impressed with the speaker, and it does seem like it would be a great match with the CS600.

      Keep me posted on your results!

      Kind regards,

      Jeff

  23. Jeff,

    Got a quad of 6n3cEs, from :http://www.cryoset.com/catalog/index.php.

    You were right.

    They’re much better balanced than the stock 6L6s and JJ 6CA7s I tried.

    Thanks for all your insights.

    Aloha,

    Dan

    PS- Maybe a new thread summarizing all of your tube recommendations/observations and tube suppliers/vendor sources is in order.

    PPS- Got this response from Leben about using KT120s:

    “It is no problem to use KT120 for CS-600, however,

    1) As CS-600 is not designed to use KT120, you can not expect
    a drastic increase of the output power of CS-600.

    2) A temperature of the power transformer shall be more than using
    6L6 or KT88, we recommend you to take an enough space for
    ventilation.”

    • Hey Dan,

      I love those 6n3cEs – they’re a great tube!

      Hey that’s a great idea about the tube vendors. I’ve had really good luck with Watford Valves in the UK, Jim McShane in the US, Radio Electric Supply in the US, and others have highly praised Brent Jesse Recording (although I haven’t dealt with Brent myself).

      Keep me posted on your tube experiments!

      Kind regards,

      Jeff

  24. Hi Jeff, nice place you have here! Well done.

    Recently I bought a Leben CS600 for my Harbeth Compact 7ES3′s. Since then I have tried different powertubes, EL34, 6n3cEs, KT77, KT88 and 6L6GC. The 6n3cE are the most open and balanced sounding ones but I tend to favour the KT77(JJ) for now as I like the fact that they soften the highs a bit. I would also like to experiment with the smaller tubes and searched the internet for some of those NOS Sylvania 6CS7 tubes you mentioned above. Sadley, they are nowhere to be found. Nor can I find any other branded NOS 6SC7 tubes, they seem te be a very rare model. Am I looking in the wrong places or is the 6SC7 really so hard to find? Can you remember where you got your Sylvania’s from?

    Thanks,

    Bas.

    • Hi Bas,

      Congrats on the Leben CS600 and Harbeths – a great combination!

      I bought all my NOS Sylvania 6CS7 from Radio Electric Supply. At the time there was an abundance of NOS Tung Sol, Sylvania and so forth. I notice that here they list them as being in stock at $4 each.

      If you decide to give RES a try let me know what sorts of tubes you got and how you like them.

      Kind regards,

      Jeff

      • Hi Jeff,

        thanks for the tip. Dale from Radio Electric Supply was very helpful but could not find me any Sylvania 6CS7′s. They currently only stock GE and Westinghouse branded 6CS7′s. So I keep on searching.

        Radio Electric Supply do however stock Sylvania branded 6CJ3 tubes. Does the 6CJ3 tube have a sound of it’s own? I now have both RCA and GE branded 6CJ3 tubes but I do not hear a difference between them. Could I improve by putting in a Sylvania 6CJ3?

        Kind regards,

        Bas.

        • Hi Bas,

          I do run the Sylvania 6CJ3, and I think they’re worth getting. I’m trying to remember if I’ve tried the GE 6CS7s … not sure. I’ll have to check my tube stash, and if not, I may have to order the GEs to try. Do you know who made the Westinghouse branded tubes?

          Best,

          Jeff

          • I had many differnt 6CJ3 from various brands.
            From GE, RCA and Sylvania. All in very good condition and very strong.

            But i can’t hear any differences in the sound!!!

            Please take only very good Sylvania 6CS7. Other brands from US tubes are not so good.
            Only japanese 6CS7 were also good.

            Best

            Maik

          • Hi Jeff and Maik,

            this week I received my order of tubes from Radio Electric and just put the Westinghouse 6CS7′s in. Offcourse they need some more burn-in time but at first listen I don’t hear that much difference with the GE’s.

            I don’t know where the Westinhouse 6CS7′s were build. There js not much info around about these tubes.

            The Leben-distributor over here didn’t have any 6CS7′s in stock but he now ordered some directly at Leben. I’m curious what brand they will be. Does anyone know what brand 6CS7′s Leben is currently using in their CS600 and CS660p amp?

            Kinds Regards,

            Bas.

          • Just as an update, after a long burn-in time the Westinghouse 6CS7 tubes now sound a bit better to me than the ones from GE. They seem smoother and more relaxed on mids and highs, without losing detail.

            I haven’t found NOS Sylvania’s or Japanese ones but to be honest I stopped searching a while back as I am now very satisfied with the sound of the Leben. The addition of Cardas cabling was the icing on the cake for me. It al fits together now.

            The Leben distributor who promised to get me some original 6CS7′s from Japan still hasn’t delivered.

            Greetings,

            Bas.

          • Try Radio Electric Supply, they usually have a variety of NOS 6CS7 tubes in stock. I’ve bought Tung Sols and Sylvanias from them. In fact that’s where I bought all my 6CS7s, and the price was very reasonable.

          • Another quick update. Just had contact with the Leben distributor over here, he now had some tubes in stock, directly from japan. I could get a quad 6cs7, together with a 6cj3 for a special price of ….. $396,- !! Holy Cow, I thought he mode a typo, but he didn’t. He even reacted insulted when I declined his offer. I didn’t bother to ask what brand of tubes.

          • Wow! That’s expensive! It’s about ten times what I paid for a Sylvania new old stock tube set for my Leben!

  25. I don’t know exactly which 6CS7 are actually build in the CS600.
    I have many Westinghouse tubes which are originally Sylvania. Maybe you have black plates?

    It is very difficult to get Sylvanias 6CS7. And as matched quad nearly impossible.

    The Sylvania 6CS7 is at the time a very rare tube. I had some matched quads, but now i own no more 6CS7, because the CS600 is sold.

    The Shindo Aurieges Phono with the Shindo Montille is much better than the RS30-EQ with CS600.
    But these are only my experiences in combination with Line Magnetic 755 fullrange speakers.

    Kind regards

    Maik

  26. Look at this guy. He has many quads in stock!!!!

    http://stores.ebay.de/TheTubeRoom?_trksid=p4340.l2563

  27. About the 6n3cE tubes. Has anyone tried 6n3c (no E) tubes? Is there a huge difference? The E’s have the waffer bottom but the non-E version has a high base.

  28. I just looked around and found the answer to my question. I guess with no E they are basically 5881′s and I noticed the non-E’s don’t have silver getters on top. I should have noticed that. :)

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