AudioAficionado.org  

Go Back   AudioAficionado.org > Manufacturers Forums > Conrad-Johnson

Conrad-Johnson It just sounds right

Reply
 
Thread Tools Display Modes
  #11  
Old 12-22-2011, 01:08 AM
Puma Cat's Avatar
Puma Cat Puma Cat is online now
conrad-johnson, baby!

 
Join Date: Aug 2010
Location: East Bay, CA
Posts: 8,209
Default

I'm still doin' pretty good with the stock EH 6922s in my Premier 17. I don't know if they've ever been replaced as I'm the second owner of this fine pre. I do want to get some GL 6922s in to try those out, or maybe some Ediswans.

The CT-5 hasn't been a problem, but I think I'm just now getting somewhere around the 1000 hr mark, and those 6H30/6N30s were specifically designed to be extremely durable, so no issues there.
__________________
conrad-johnson CT-5 and LP70S, Michell Gyro SE MkII, SME V, Koetsu Urushi Vermilion w/ EAR324, Oppo BD-83SE, Sonore OpticalModule with Uptone Audio LPS-1.2 power supply, SOtM UltraNeo with Keces P3 power supply, Shunyata Alpha USB cable, Schiit Gungnir Multibit Gen 5 USB DAC, Schiit Loki DSD DAC, Mac Mini/Roon, Dynaudio Contour S3.4 with Esotar 2 tweeters, REL R-305, Audioquest Colombia and Colorado ICs, Shunyata Venom speaker cables, Shunyata Zitron Cobra and Black Mamba CX and Venom 3 power cords, Shunyata Triton, Synergistics Research HFT acoustical tuning devices
Reply With Quote
  #12  
Old 12-22-2011, 06:10 AM
ronenash's Avatar
ronenash ronenash is offline
Senior Member
 
Join Date: Oct 2010
Location: US-NY
Posts: 1,097
Default

Quote:
Originally Posted by turntable View Post
I have had my GAT for several months and I am on my third set of factory 6922 tubes

The tubes do not fail, but get noisy with tube hiss. I noticed the right channel had got noisy. Lucky I have a set of ten left from my art, however this is not good.

I can't see how you can blame the eh tubes as I have not had these issues with my art/prem 16 in the past.

Anyone else had any tube noise issues?
I have confirmed with CJ that there was a defective series of tube from EH. It appears the 2010 series of 6922 have had a high failure rate with many going noisy only after a few hundred hours.
I have seen this in the ET3 as well as the ET5. In both cases putting in another tube (either JJ 6922 or even better Gold Lion 6922) took care of the problem.
As a general rule, avoid EH 6922 that have the 2010 date on them.

Tubes is the ET5 should last 3-5 year without a problem.
__________________
ronenash
----------------------------------------------------------
Amps: CJ LP125mSE, Beard P100, CJ ACT2.1 Analog: VPI Classic 1/Blackbird/Lounge phonostage
Thorens TD125mk2/AT1005MK2/103R/Audio Analogue Aria 2.0
Digital: PC-->Meridian Director, Schiit Loki/J.River Speakers: SF Amati Anniversario
Reply With Quote
  #13  
Old 12-22-2011, 07:03 AM
Myles B. Astor's Avatar
Myles B. Astor Myles B. Astor is offline
Senior Member
 
Join Date: Nov 2011
Location: New York City
Posts: 1,316
Default

Quote:
Originally Posted by ronenash View Post
I have confirmed with CJ that there was a defective series of tube from EH. It appears the 2010 series of 6922 have had a high failure rate with many going noisy only after a few hundred hours.
I have seen this in the ET3 as well as the ET5. In both cases putting in another tube (either JJ 6922 or even better Gold Lion 6922) took care of the problem.
As a general rule, avoid EH 6922 that have the 2010 date on them.

Tubes is the ET5 should last 3-5 year without a problem.
Great, that's when I bought a backup pair
__________________
Myles Astor, Senior Editor., Positive-Feedback.com
______________________________
conrad-johnson ART300 amp, cj GAT S.2 preamp, Doshi V3.0 phono and tape stages; Magico S5 Mk. 2 speakers; VPI Vanquish Turntable, VPI 12-inch dual pivot 3D and gimbal arm, SAT LM-12 arm; Lyra Atlas SL, Fuuga, vdh Colibri Master Signature cartridges; Technics 1506/FM heads; Various cables including TA, MIT, Kubala-Sosna, Skogrand, Viero L3 Equilibrio speaker cables, Audience, SRA Craz rack, Isobase and OHIO Class XL+2 platforms.
Reply With Quote
  #14  
Old 12-22-2011, 07:33 AM
turntable's Avatar
turntable turntable is offline
Senior Member
 
Join Date: May 2009
Location: Downunder in Sydney
Posts: 1,769
Default

Quote:
Originally Posted by ronenash View Post
I have confirmed with CJ that there was a defective series of tube from EH. It appears the 2010 series of 6922 have had a high failure rate with many going noisy only after a few hundred hours.
I have seen this in the ET3 as well as the ET5. In both cases putting in another tube (either JJ 6922 or even better Gold Lion 6922) took care of the problem.
As a general rule, avoid EH 6922 that have the 2010 date on them.

Tubes is the ET5 should last 3-5 year without a problem.
Most of my spare ones 411are 07 09. Replacement gat two are 09 09
Reply With Quote
  #15  
Old 12-22-2011, 10:16 PM
ronenash's Avatar
ronenash ronenash is offline
Senior Member
 
Join Date: Oct 2010
Location: US-NY
Posts: 1,097
Default

I am sure EH had qality issues in other series tubes as well. Try a Gold Lion and you should have no problems for years to come. Although its the same company the quality control on the GL's is much better.
__________________
ronenash
----------------------------------------------------------
Amps: CJ LP125mSE, Beard P100, CJ ACT2.1 Analog: VPI Classic 1/Blackbird/Lounge phonostage
Thorens TD125mk2/AT1005MK2/103R/Audio Analogue Aria 2.0
Digital: PC-->Meridian Director, Schiit Loki/J.River Speakers: SF Amati Anniversario
Reply With Quote
  #16  
Old 12-25-2011, 07:35 PM
Rayooo's Avatar
Rayooo Rayooo is offline
Senior Member
 
Join Date: Jun 2011
Location: Northeast US
Posts: 1,160
Default

I don't know if it's my bad luck with tubes, the ET-5 being somewhat tough on tubes or what.

In the last few days... the system has been moving to sounding "2D" vs that lush magical almost "3D" sound stage. bass seemed a bit anemic and overall just less pleasing.

Just for the heck of it on a whim today, I popped the Ediswan 6922 back in. well right off the deep end was back..and I was back to "seeing the sound in 3D"

So then I do my standard micro phonics tube test on the Ediswan. A simple light touch of the tube in question. In this case it causes a monstrous sound in both speakers. This tube has become one of the best microphones I've ever seen. I know some of this is normal with any tube...and some tubes I can slap pretty good with no micro phonics whatsoever.

So, at this point, although the EAT 6922 is dead quiet and seems to "work", and the Ediswan works wonderfully, but is micro phonic as all get out. (oh and yea, this is of course a "Platinum" version of the Ediswan.) I'm keeping it in for now and ordering another. I'm not sure what I'll do with the EAT. My first EAT went way noisy, this one started off sounding wonderful, it still works, but sounds terrible.

Happy Holidays to everyone!!
__________________
J-River MC 19 on custom Win7 PC. USB - Meitner MA 1. Conrad Johnson GAT. Conrad Johnson ART Monos. Magnepan 20.7. Pro-Studio/WBT Interconnects. Moon Audio Black Dragon Speaker Cable. Furman P2400-IT.
Reply With Quote
  #17  
Old 12-26-2011, 07:58 PM
Coppy's Avatar
Coppy Coppy is online now
On the Slow Coast

 
Join Date: Feb 2011
Location: Sarasota, Florida
Posts: 592
Default

Quote:
Originally Posted by turntable View Post
Most of my spare ones 411are 07 09. Replacement gat two are 09 09
Well... My Gat sounded a bit flat so I gave the Holland Mullards I put in a few months ago a little tap. On was very noisy and the other just a little. So in went my old EH6922s. One's a little microphonic the other is fine but the sound is okay again. Think this NOS thing is always a gamble. Maybe better to stick with something new and tested. Guess I'll get Ed to send me a couple of new ones tomorrow.

Happy new year to everyone!

Bob
Reply With Quote
  #18  
Old 12-27-2011, 05:14 AM
Rafale's Avatar
Rafale Rafale is offline
Senior Member
 
Join Date: Jun 2011
Location: Tours Loire Valley France
Posts: 2,031
Default

my GAT is since a few days equipped with EAT 6922 selected.....it is very probably the end of my adventures on NOS territory,they are absolutely magnificent in all the departments....more to come but but by far they are the best 6922 that I listened with my GAT, I tried Tesla, EH, GL, JJ, Mullard Holland.... remain to verify their reliability in the time
btw I have just had a failure on a new set of NOS Mullard in the 'ignition' and I have fear the worst for my amplifier....
__________________
Philippe

l
LP12SE,urika phonostage,radikal power supply, dynavector XV-1s,conrad-johnson GAT and LP275M, Sonus Faber Elipsa,yter/naim/Linn cables, vibex, finite elemente
Reply With Quote
  #19  
Old 12-27-2011, 11:15 AM
jimtranr's Avatar
jimtranr jimtranr is online now
Senior Member

 
Join Date: May 2011
Location: Corvallis, OR
Posts: 756
Default

Quote:
Originally Posted by Rafale View Post
btw I have just had a failure on a new set of NOS Mullard in the 'ignition' and I have fear the worst for my amplifier....
Hoping the result is not "the worst," Philippe.
__________________
Jim

Living Room: Win 10 AMD A12 laptop/JRiver Media Center 25 audio player; Uptone Audio ISO REGEN powered by LPS 1.2 Ultra Cap supply; TEAC UD-501 DAC; upgraded SOTA Sapphire III; Origin Live Encounter Mk3c/Ortofon 2M Black, Graham Slee Era Gold V; McIntosh MR77; Oppo BDP-83; conrad johnson Premier 17LS (6922EH); conrad-johnson MF2500; Paradigm SE-3. Wireworld Starlight 7 USB (laptop to ISO REGEN); Wireworld Eclipse 7 (UD-501 to 17LS & 17LS-to-MF2500) and Equinox 6 ICs, Blue Jeans/Belden 5T00UP SC. PS Audio Dectet, Wireworld Electra 7 PCs (PR17LS, Dectet) & Electra 5/2 (wall to Dectet and to Sony Bravia 40" flatscreen), Hubbell HBL5362 duplex outlet. GIK standard 244, scatter-plate 244, and Monster panel traps.

Home Office: Win 10 PC/JRiver Media Center 25 audio player; Uptone Audio REGEN w/ LPS-1 linear power supply; TEAC UD-501 DAC; Luminous Audio Technology Axiom Mk. II passive line stage; conrad-johnson Sonographe SA250; Paradigm SE-1. WW Silver Starlight 7 (laptop to REGEN); WW Eclipse 7 (Axiom II to SA250) & Equinox 6 (UD-501 to Axiom II) ICs, Blue Jeans/Belden 5T00UP speaker cable, Blue Circle Thingee FX 0e power distributor; Shunyata Sidewinder Gold power cords.

Bedroom:External USB 3.0 4TB HDD-->Win 10 i7 laptop/JRiver Media Center audio player. Shunyata Alpha USB cable; TEAC UD-501; Luminous Audio Technology Axiom Mk. II Walker Mod passive line stage ;conrad-johnson Sonographe SA250; stand-mounted Paradigm Studio 20 v.5; original Shunyata Hydra PLC; WW Eclipse 8 ICs and Wireworld Eclipse 8 SC; Shunyata Venom NR v10 power cord from wall to Hydra and from Hydra to UD-501; PS Audio Power Port; Shunyata Venom Defender; Stillpoints Ultra Minis under Hydra, UD-501, and SA250; GIK 244 and 224 traps, Alpha 4A panels, and DIY 4"-thick 12"x15" traps.
Reply With Quote
  #20  
Old 12-27-2011, 11:23 AM
jimtranr's Avatar
jimtranr jimtranr is online now
Senior Member

 
Join Date: May 2011
Location: Corvallis, OR
Posts: 756
Default

Quote:
Originally Posted by Coppy View Post
Well... My Gat sounded a bit flat so I gave the Holland Mullards I put in a few months ago a little tap. On was very noisy and the other just a little. So in went my old EH6922s. One's a little microphonic the other is fine but the sound is okay again. Think this NOS thing is always a gamble. Maybe better to stick with something new and tested. Guess I'll get Ed to send me a couple of new ones tomorrow.

Happy new year to everyone!

Bob
Happy new year back to you, Bob.

While I've been tempted from time to time to tube-roll in my PR17, I've had such good luck reliability-and-longevity-wise with first the original-equipment Sovteks and more recently EH's that I've decided to leave well enough alone. While that means foregoing a possible bump in performance, I tend to sleep better at night.
__________________
Jim

Living Room: Win 10 AMD A12 laptop/JRiver Media Center 25 audio player; Uptone Audio ISO REGEN powered by LPS 1.2 Ultra Cap supply; TEAC UD-501 DAC; upgraded SOTA Sapphire III; Origin Live Encounter Mk3c/Ortofon 2M Black, Graham Slee Era Gold V; McIntosh MR77; Oppo BDP-83; conrad johnson Premier 17LS (6922EH); conrad-johnson MF2500; Paradigm SE-3. Wireworld Starlight 7 USB (laptop to ISO REGEN); Wireworld Eclipse 7 (UD-501 to 17LS & 17LS-to-MF2500) and Equinox 6 ICs, Blue Jeans/Belden 5T00UP SC. PS Audio Dectet, Wireworld Electra 7 PCs (PR17LS, Dectet) & Electra 5/2 (wall to Dectet and to Sony Bravia 40" flatscreen), Hubbell HBL5362 duplex outlet. GIK standard 244, scatter-plate 244, and Monster panel traps.

Home Office: Win 10 PC/JRiver Media Center 25 audio player; Uptone Audio REGEN w/ LPS-1 linear power supply; TEAC UD-501 DAC; Luminous Audio Technology Axiom Mk. II passive line stage; conrad-johnson Sonographe SA250; Paradigm SE-1. WW Silver Starlight 7 (laptop to REGEN); WW Eclipse 7 (Axiom II to SA250) & Equinox 6 (UD-501 to Axiom II) ICs, Blue Jeans/Belden 5T00UP speaker cable, Blue Circle Thingee FX 0e power distributor; Shunyata Sidewinder Gold power cords.

Bedroom:External USB 3.0 4TB HDD-->Win 10 i7 laptop/JRiver Media Center audio player. Shunyata Alpha USB cable; TEAC UD-501; Luminous Audio Technology Axiom Mk. II Walker Mod passive line stage ;conrad-johnson Sonographe SA250; stand-mounted Paradigm Studio 20 v.5; original Shunyata Hydra PLC; WW Eclipse 8 ICs and Wireworld Eclipse 8 SC; Shunyata Venom NR v10 power cord from wall to Hydra and from Hydra to UD-501; PS Audio Power Port; Shunyata Venom Defender; Stillpoints Ultra Minis under Hydra, UD-501, and SA250; GIK 244 and 224 traps, Alpha 4A panels, and DIY 4"-thick 12"x15" traps.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Audioaficionado.org tested by Norton Internet Security

All times are GMT -4. The time now is 09:51 PM.



Powered by vBulletin® Version 3.8.10
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
ęCopyright 2009-2019 AudioAficionado.org.Privately owned, All Rights Reserved.
Audio Aficionado Sponsors
AudioAficionado Subscriber
AudioAficionado Subscriber
Inspire By Dennis Had
Inspire By Dennis Had
Harmonic Resolution Systems
Harmonic Resolution Systems
Wyred4Sound
Wyred4Sound
Dragonfire Acoustics
Dragonfire Acoustics
GIK Acoustics
GIK Acoustics
Esoteric
Esoteric
AC Infinity
AC Infinity
JL Audio
JL Audio
Acoustic Sciences Corportation
Acoustic Sciences Corportation
Legend Audio & Video
Legend Audio & Video
Audio by E
Audio by E
Canton
Canton
Bryston
Bryston
WireWorld Cables
WireWorld Cables
Stillpoints
Stillpoints
Bricasti Design
Bricasti Design
Furutech
Furutech
Shunyata Research
Shunyata Research
Accuphase
Accuphase