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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.
128x128markusthenaimnut
duramax747
193 posts
 
Because of the high cost of the 6sn7 tube set, as stated,  I decided to go with a 6J5GT tube in the preamp Mick is building me. 
isaacc7
42 posts
 
Ooh, ask him to do the 12v for that. 12j5 tubes go for a song! Hmm, wonder if you could also use 6c5 tubes. In any case it's always better to have more tubes on display lol. 
duramax747
193 posts
 
As far as 6J5GT the circa 1930's RCA are the way to go. 

Whats the benefit of doing the 12v?
markusthenaimnut's avatar
markusthenaimnut OP
371 posts
 
Anybody else occasionally use 6J5's in those adapters that allow substitution in the 6SN7 location? I had a pair of the adapters built by someone in Ukraine or someplace like that (can't even remember where or how I was put in touch with him). 

There's a thread somewhere around here titled something like "in a surprising hollywood twist ending to the 6SN7 story, the 6J5 wins..." or something like that.
duramax747
193 posts
 
I spoke with Mick and he said his best line stage was built around the 6J5GT and the circuit he designed. 

It's called Grange Signature. It s a four month wait but looking forward to it.
Gloss black with chrome. 

If you go to his 2021 blog from his website you can read his thoughts. 
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