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In Reply to: RE: A question about max plate voltage on the 6SN7 or 6F8G. . posted by Caucasian Blackplate on July 15, 2015 at 18:47:40
a David Berning design. He stated that with this headphone amp that was just recently reintroduced, he has never had problems with any of the 6SN7 tube types, including GT, which are rated at 300 volts max.I am not sure why he chose to run them so high but also states that the tube life is 10,000 hours in this headphone amp. I don't see how as I assume they have a normal bias for the voltage and while the heater is run close to 6 volts, they are still working but even at 450 and running some pre GTA no problems so far, which I don't totally understand.
It comes with a 12AT7 to a 6SN7 for each channel.
iBasso DX100,DX50 DX90. Chord Hugo. HiFiman 901 balanced. RSA Intruder, The Lightning. Fostex TH900 balanced, Hifiman HE-6, 560, 500, JH13 Pro balanced. Lyr2, Audeze. All phones balanced mostly with Whiplash cables. Photo gallery: www.pbase.com/jamato8
Edits: 07/16/15Follow Ups:
10,000 hours would be very low life for an old stock 6SN7.
I've had some 6SN7's go for 30,000 hours without the needle moving on my emissions tester.
I have used 6SN7's and have some of the good ones but I don't have that much experience with life expectancy. So 30,000 hours. . . not a bad lifespan.
Any experience with the 12AT7 types?
iBasso DX100,DX50 DX90. Chord Hugo. HiFiman 901 balanced. RSA Intruder, The Lightning. Fostex TH900 balanced, Hifiman HE-6, 560, 500, JH13 Pro balanced. Lyr2, Audeze. All phones balanced mostly with Whiplash cables. Photo gallery: www.pbase.com/jamato8
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