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You need a pair of Raytheon VT-231s in the rear sockets. The front sockets will then be able to flavor your music/tone. For a full juicy presentation, try RCA VT 231s(lighter), or Sylvania VT231 (fuller). Best neutral tube is the 1952 Sylvania 6SN7GT, or TungSol round plate 6SN7GT.
Sylvania 6SN7W is a great tube, and very dynamic.
Claud (System | Threads | Answers | This Thread)
The Sylvania are very popular so are the Raytheon particularly in the rear sockets. I am currently using National Union Grey Glass and have found them to be the best 6SN7s to my ears in my system. I'd try the Sylvania first since most people seem to prefer them. I have several pairs if you want to try some.
Jaiello (System | Answers | This Thread)
I recently sold my SLP-98L, but tried a number of tubes in it while I had it. One person you may want to speak with is Andy at Vintage Tube Services. He knows this preamp well and can make some nice tube suggestions. One suggestion he made to me is to use 6SN7GTA or GTB tubes in the buffer stage (rear sockets) and use 6SN7W, WGT, GT or VT-231 types in the gain stage. He said the buffer stage had a tendency to wear out the W, GT, and 231 types quickly. This advice worked well for me. Some of the combos I tried were:
Raytheon VT-231 (late '40's)/Sylvania 6SN7GTB (early '60s)
Raytheon VT-231/Tungsol 6SN7GTB (early '60s)
Sylvania 6SN7W (black base short and tall bottles from the late '40s)/Sylavania 6SN7GTB
Sylvania 6SN7WGT (early '50's)/Sylvania 6SN7GTB
Sylvania 6SN7WGT/Tungsol 6SN7GTB
Sylvania 6SN7GT ('50s Bad Boy tall bottles)/Sylvania 6SN7GTB
All of the combinations were interesting and it was a fun process. I would have to say the Raytheon was an excellent tube, right up there with the "W", but at a much lower price. I liked the combo with the Sylvania GTB better than the Tungsol GTB. An excellent combo, but a bit expensive is the Sylvania "W" (I preferred the short bottle as they were less microphonic) with the Sylvania GTB (the GT/GTB was nice too). The Sylvania GTBs I bought were from Tube World and Brendan has an excellent selection of cryoed tubes which is what he sold me. The Sylvania WGT is a nice tube and in this case I liked it better with the Tungsol than the other Sylvania GTB.
Here is a link I used to review 6SN7 type tubes and their characteristics:
One thing to be aware of is that 6SN7 tubes are getting rare and finding good, non-forged, low microphonic tubes are difficult and expensive. In my opinion the new production versions don't hold up, although Cary swears by the Chinese ones they use and maybe rightfully so as some designers are voicing their products to specific types of tubes by specific manufacturers.
Also, email me if you like, since I no longer own the SLP you might be able to convince me to sell a couple of pairs to you.
Clio09 (System | Reviews | Threads | Answers | This Thread)
I had an slp98 with phono. my advice to you, unless you hav ... Linnlp12
Can anyone suggest a reputable vendor for the tubes? i see ... Skuras
Vintage tube services - andy bouwman tube world - brendan bi ... Clio09
I received more than one email from people who told me that ... Skuras
In my system it was well worth the time and expense. as i sa ... Clio09
As for using Raytheon-VT 231s in the Cary, which type is more preferable : flat plates or t-plates?
Roblanger (Threads | Answers | This Thread)
Well worth tube rolling, and the "f1" version (dir ... Triode