#41
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That's ashame -- hope you or the fine folks at cj gets to the bottom of the issue -- they are great components.
Best in your troubleshooting/resolution. Bob
__________________
Amps:VAC 450iQ Monos in Silver Flake on HRS M3X2-1921's, HRS G7 Footers/G-Links & Sound Anchor Conecoasters. Preamp:VAC Statement (on order) (Silver Flake) Digital Source: dCS Rossini CD/SACD Transport, Vivaldi APEX DAC, Upsampler Plus & matching Clock (Silver) Analogue Preamp:VAC Renaissance SE Phono stage in Silver Flake with XLR Output Option & with Nordost Valhalla XLR's. Analogue Sources:SME 20/2 w/SME V arm & Nordost Odin 2 Tone Arm Cable, Palo Santos Presentation Cartridge & Akai GX-400D Reel-to-Reel w/relapped heads by JRF Magnetic Sciences. Akai RC-17 cabled remote (original owner since 1974). Vibration Control:TT on HRS M3X2-1921 shelf. Speakers:Wilson Audio Alexia V (on order in Ferrari Argento Silver/Parchment grills sitting on Acoustic Diode Kit). Power Cables:4 Nordost Odin Supreme Reference on amps, preamp & DAC. Ansuz Acoustics C2 on Transport & Clock. Power Distribution:Ansuz Mainz D3 Distributor & Ansuz Mainz C2 1M Power Cable Power Outlets:Furutech GTX-D NCF (R) duplex outlet, GTX Wall Plate & Duplex Cover (x2) on dedicated, same panel phase, 20A breakers. Speaker Cables:2M Nordost Odin 2 Supreme Reference on Nordost Sort Lifts. Signal Cables:Nordost Odin XLR's on dCS DAC & Amps. Digital Cables: Nordost Odin 2's, 110-ohm AES/EBU on dCS Transport to DAC. Clock Cables:5 each 75 ohm 1.25M Nordost Valhalla BNC/BNC Digital Ethernet Cable: WireWorld Platinum 1M Starlight® 8 Twinax Headphones:Vintage Koss Pro IV AA. RCM: Audio Desk PRO Tube Test Gear:Mint late '60's/calibrated Heathkit TT-1A, MaxiMatcher Power Amp & Preamp & Space Tech Labs ATT-3.02 tube test sets. |
#42
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Joe, you never had your cj components in your system long enough to have anything go wrong
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#43
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Good move...
__________________
Wilson Yvette speakers, Conrad-Johnson ART88 pre, TEA1bc phono, and ART27A Amplifier, Marantz digital player, Rega Planar 10 turntable / Apheta 3 cartridge,Wireworld Gold and Platinum Eclipse IC and speaker, I AQ Hurricane, Tornado power cables, Shunyata Denali 2 conditioner, dCS Bartok DAC/Streamer |
#44
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Quote:
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#45
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I had the same problem. CJ mentioned that there was a bad stash of tubes from EH that were turning noisy. They can identify them by the dates. Once I replaced the EH tubes with the Matsushita 7DJ8 I had it working for over a 1000 hours with no problem whatsoever. A friend of mine received a replacement EH6922 from CJ and also worked with it for over 500 hours without a problem.
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#46
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I am sure they will. Lew and the cj team are amongst the nicest in the business.
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#47
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+1
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#48
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Quote:
Best Bob
__________________
Amps:VAC 450iQ Monos in Silver Flake on HRS M3X2-1921's, HRS G7 Footers/G-Links & Sound Anchor Conecoasters. Preamp:VAC Statement (on order) (Silver Flake) Digital Source: dCS Rossini CD/SACD Transport, Vivaldi APEX DAC, Upsampler Plus & matching Clock (Silver) Analogue Preamp:VAC Renaissance SE Phono stage in Silver Flake with XLR Output Option & with Nordost Valhalla XLR's. Analogue Sources:SME 20/2 w/SME V arm & Nordost Odin 2 Tone Arm Cable, Palo Santos Presentation Cartridge & Akai GX-400D Reel-to-Reel w/relapped heads by JRF Magnetic Sciences. Akai RC-17 cabled remote (original owner since 1974). Vibration Control:TT on HRS M3X2-1921 shelf. Speakers:Wilson Audio Alexia V (on order in Ferrari Argento Silver/Parchment grills sitting on Acoustic Diode Kit). Power Cables:4 Nordost Odin Supreme Reference on amps, preamp & DAC. Ansuz Acoustics C2 on Transport & Clock. Power Distribution:Ansuz Mainz D3 Distributor & Ansuz Mainz C2 1M Power Cable Power Outlets:Furutech GTX-D NCF (R) duplex outlet, GTX Wall Plate & Duplex Cover (x2) on dedicated, same panel phase, 20A breakers. Speaker Cables:2M Nordost Odin 2 Supreme Reference on Nordost Sort Lifts. Signal Cables:Nordost Odin XLR's on dCS DAC & Amps. Digital Cables: Nordost Odin 2's, 110-ohm AES/EBU on dCS Transport to DAC. Clock Cables:5 each 75 ohm 1.25M Nordost Valhalla BNC/BNC Digital Ethernet Cable: WireWorld Platinum 1M Starlight® 8 Twinax Headphones:Vintage Koss Pro IV AA. RCM: Audio Desk PRO Tube Test Gear:Mint late '60's/calibrated Heathkit TT-1A, MaxiMatcher Power Amp & Preamp & Space Tech Labs ATT-3.02 tube test sets. |
#49
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The nicest I have ever met that's for sure. This is one of the reasons for over 20 years now I keep coming back.
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#50
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Thought I would provide a bit more information on this one.
I am guessing the noise you are hearing in this case is just white noise with no crackling or breakage noises. The white noise will get stronger as the tube ages until the tube becomes useless. If the noise you are hearing does not match this description then you are looking at a different problem. Tube noise that matches the above is in most cases a result of disintegration of the coating on the tube filament (the heater wire inside the tube). I believe the scientific explanation for this is that once the coating goes bad stray electrons from the filament are interfering with the normal operation of the tube and causing noise. This problem with the filament coating can be a result operating the tube at higher filament voltages then the 6.3v the tube is designed for or a defect in the manufacturing of the tube. I have checked the voltages inside CJ preamps and they are spot on so that leaves us with the manufacturing defect as Lew Johnson mentioned. I think Reflector had this problem for quite a while since I have seen it on Gold Lion tubes as well (GL's are premium EH tubes manufactured at the same factory). The problem is more noticeable when the tube is used in high gain application such as that in a CJ preamp where no feedback is used which reduces the gain. Using these tube in as driver tubes in a power amp will not be a problem in most cases as the tube is configured to driver the output tubes and not to amplify the signal. This is a rather technical explanation. I hope I have not gone overboard Anyway, I hope this helps understand what we are experiencing. |
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