Supratek Owners Thread

Greetings All - 
It appears that the 26-million-plus view, multi-decade "Preamp Deal of the Century" Supratek thread has been removed. I'm not sure why, but suppose there must be a reasonable explanation.
In any case, on that thread I recently asked whether there might be interest in a "Supratek owners thread" and received some interest. 
The purpose of this thread is for Supratek owners to share the details of their system, ask questions, share information about any tube-rolling they have done, and so forth.
I'll kick us off here with a few details about my system -
ancient Linn LP12 with Ittok arm, Dynavector 17D3 cartridge into Cortese LCR phono stage
Power amp is a fully serviced Innersound Electrostatic amplifier
Quad ESL63 speakers (not USA monitors) or JBL 4430 studio monitors
Digital sources are immature and evolving - ancient Fostex CR300 cd player/burner
DacMagic 100 DAC
Nordost Blue Heaven 75ohm interconnect
Due to the fairly long lengths of speaker wire required in the new listening room, speaker wire is Belden 12 gauge wire designed for low-voltage outdoor lighting systems. 
Next steps - dedicated circuit, new power cords, new interconnects, new wires.

Heh, just realized all of the ones I mentioned need adapters lol. These should be pretty close to the same tubes if you get the 6sn7 versions but the prices will make you cry:)


GEC/Marconi/Osram b63

Raytheon VT231

Sylvania 6sn7wgt 

I’m not sure if there is an equivalent 6sn7 to the round plate Ken Rad… My advice is don’t be afraid of adapters, especially if you want access to the best sounding tubes at a reasonable cost. 10-15 years ago you could buy any tube you wanted even if some were more expensive than others. Now some of the best tubes are difficult to find and are incredibly expensive when you do find them. I think the NOS tube rolling game has just about run its course, at least for the generally accepted “best” versions. You can still get great single triodes. A 6j5 is just a half of a 6sn7 so two of them are exactly the same electrically. Mick would be happy to make a preamp with 2x 6j5 instead of 6sn7 if you don’t want to use adapters. Or do what I did and get the option to use 12v tubes *and* use adapters:)

@isaacc7 Oh well I think I will start out with traditional 6sn7 tubes.  I really don’t want to mess around with adapters starting out.  Mick included a 40-50’s Radiotron 6SN7gt pair made in Australia.  I have pairs of Rca grey glass 6SN7gt’s, Rca 6SN7gta’s and Raytheon 6SN7gtb’s from the 50’ s to start out. Power tubes I have a selection of 6L6’s to try as well.  Should be fun.  Thanks for your suggestions.

Regarding the use of adapters - In the owners manual Mick cautions against "excessive" tube rolling, because it can cause the sockets to eventually lose some of their grip.

Hence I use socket savers.

In my DHT i'm using Cossor WE300b tubes which are a major upgrade over the stock Psvane tubes. For a rectifier tube i'm using a Phillips 5R4GYS immediate improvement over the JJ GZ34, the music is cleaner with an added layer of textures presenting a very real soundstage. The 6SN7's have made the least impact as to sound maybe because of their use as driver tubes, i'm using original Bad Boy's. The Cossor WE300b's are very close in sound to original WE 300b's and for the price are hard to beat i bought mine from VKmusic. The biggest surprise was the 5R4GYS rectifier tube which was a major improvement in sound right from the beginning.

Thanks everybody on this thread for sharing your experience with Supratek/Mick. It was extremely useful to me making my decision.

I just placed an order for Cortese LCR preamp/phono.

I cant wait to receive and hear this preamp. It was go against my current pre - EAR Yoshino 868PL preamp so stakes are somewhat high already.

I will share my few months once I receive it..