@markusthenaimnut in regards to your ques. above. I've been running mine (LCR) for the last 2 years without issue. The pre will stay on for 8-10 hrs at a time on a regular basis. No small tube failure yet. I have found that I prefer the 6n6p in the phono though. Have used 7308 and the supplied 6h23. In an earlier conversation with Mick he did mention to me that he had started to see a higher failure rate than expected with the 6h23's he was supplying for a while and recommended switching them out although I'm having no issue with mine yet at the moment,.. It's possible that the one 7308 you put in was already on the fence. Just about imposible to tell with tubes. I will say that the heater voltages are always spot on as they are regulated and the circuit does not put alot of stress (V/ma) on that tube (any of them for that matter). May be nothing more than a bit of bad tube luck. I do highly recommend trying some 6n6p if you haven't. A touch less gain but that's rarely a problem in a Supra.. If you feel like somethings out of whack or are overly concerned I'd be happy to take a look for you and make sure everything is in spec.
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.
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.
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- 544 posts total
- 544 posts total