Supratek Tubes and Tube Swappin' for Everybody

Thanks Aroc! Also... Ecclectique & Fiddler have added a great deal of tube info too. Actually... LOTS of people have added great tube info to that thread. It's so rich with good information.

In my Cortese, I use:

Regulator: Western Electric 350B
Rectifier: Bendix 6106
Line: Mullard CV181 / ECC32 (kinda like a 6SN7 but doesn't always work in Syrah pre's - not the very best sounding tube, but quite close. I use mostly because it is awesome looking! :) Similar sound to the Tung Sol Round Plate...
Phono: Mullard E180F - Telefunken CCa

Best 6SN7 Tubes:
Tung Sol Round Plate (6SN7GT/VT231)
Ken Rad Black Glass *note three different sound types
> Marked NAVY - these are the most open sounding
> Marked VT231 - These are the most "neutral"
> Marked 6SN7GT (no other markings) these are "dark"
* in general the Black Glass Ken Rad is the most romantic, richest sounding tube in this preamp. The three "grades" mentioned above are all within the romantic spectrum.
Raytheon VT231
Sylvania 6SN7W Metal Base

No doubt the best rectifier is a WELL BROKEN IN Bendix 6106. This rectifer sounds terrible when new - weird. I don't know how long it takes to start sounding good but I am guessing many. Be patient, it will get good. For those who had tried and gave up, keep on trying. Let that sucker bake! To break in, I disconnected my line stage from the power supply - plugged in some cheap regulator tubes and let the powersupply run.. day and night for a week or more.

The Mullard rectifiers (GZ34, GZ37, GZ33, GZ32) are popular but warmer, less impact, more muddy sounding tubes (sorry).

Various 5V4G tubes produce a broad range of neat sounds. Fun to try because most are cheap.

Regulators.

350B is the best - hands down.
6F6G is reported to be good (i've never used)
Sylvania 5932 (three types)
> Dual Black Plate - nice sounding tubes
> Gray Plate with holes
> Gray Plate no holes (super neutral sounding to the point of boredom but man.. these make the preamp sound tonally accurate)
KT66 MO Valve (GEC,Genalex,etc) Nice sweet sound.. Involving but these have to be used with a Mullard rectifier.
Tung Sol 5881 a good starter tube but you will quickly outgrow it.

Thanks for the excellent info Brian!

Bwhite,
great comprehensive post !
Is Bendix 6106 better then Philips Miniwatt GZ34 (which I'm using) for Chenin ?
For short time I had WE350B I had impression that sound was too worm, I have warm monoblocks, so what is the best way to have a little more highs (what tubes) without sacrificing anything.
I'm using Ken Rad Black Glass VT231,Philips Miniwatt GZ34 (rest is stock).

Sorlowski - give the Bendix a try. It is a somewhat inexpensive tube too.

The WE350B's are not exactly warm on their own but when paired with the GZ tubes, they can be...

The Early(1950's) RCA 5V4G (ST Shaped - black base) tubes are a more open sounding rectifiers. I think these are available NOS for under 35 bucks.

I think the GZ34's (as well as most other Mullard GZ tubes) are too muddy sounding. While the Metal base GZ34 is one of the best rectifier choices it pales in comparison to the Bendix.

Now.. when I first got the Bendix, I hated it. It did something strange to the pace of the music - everything seemed awkward. I think others who tried the Bendix at about that time had similar experiences. Once I burned in the Bendix though, everything came into focus. The Bendix is on the warmer side of neutral but the bass is tight, detail is there, the dimensionality increases substantially. Pace is correct. Its a great tube.

Like I said above. Burn in the Bendix. Just disconnect the power supply from the line stage, insert the Bendix and let it cook for a week or more. Every day or so, give it a listen and eventually it will outperform anything else and stop sounding weird.

Another good thing about the Bendix is that it's a slow starting tube and does not stress out the other tubes when it heats up. Some of the Mullard GZ's start fast and in some cases blow fuses on Supratek's. This stresses out the other tubes and shortens their lifespan.

The Ken Rads are good tubes - very organic -rich and warm. Changing these with Raytheon VT231 or Tung Sol Rounds will add more transparency & detail but you will lose some of the midrange magic, weight and round-ness you like with the Ken Rads.

Another possibility is the RCA 5692 red base tubes. I really wanted to like these tubes because they do many things well but for my system I felt they were too detailed and I personaly loved the warmth of the Ken Rads / sweetness of the Tung Sols. If the rest of your system is warm sounding, the 5692's might work for you. Great bass, good detail and dimensionality.. just not "luxurious" or romantic.

Amazing, this is exactly what I was hoping would happen. Looks like we can all get into bidding wars on ebay now. I just stopped in to check this and will be reading more closely later, when by the way I will be listen to my new Chenin! I gotta go pick it up at the hold center a ways away cuz I got drunk and slept on a friends sofa last night, obviously missing the Fedex guy, damn.
I'll have a few more questions too, I'll get to those later.