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  #81  
Old 09-20-2012, 05:44 PM
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Originally Posted by Coppy View Post
Joe and Ray...

Got the Tele ECC88s today. Listened to some music with the EH6922s in for comparison then plugged in the Teles. One has a very low level, just the smallest bit of hum but do they sound terrific. I have to plant my ear on the speaker to hear the hum but the increased transparency is all over the room at all volume levels. Maybe all this gets better with some break-in time.

Ray... let me know how yours sound. I'm really impressed with the increase in low volume transparency. Still plenty of bottom end. I'm using my PR350 to start as it tends to be a bit more ruthless with detail. Have a meeting tonight so tomorrow will be the trial with the LP140s.

Bob
I totally understand that...
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  #82  
Old 09-20-2012, 08:29 PM
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Quote:
Originally Posted by Coppy View Post
Joe and Ray...

Got the Tele ECC88s today. Listened to some music with the EH6922s in for comparison then plugged in the Teles. One has a very low level, just the smallest bit of hum but do they sound terrific. I have to plant my ear on the speaker to hear the hum but the increased transparency is all over the room at all volume levels. Maybe all this gets better with some break-in time.

Ray... let me know how yours sound. I'm really impressed with the increase in low volume transparency. Still plenty of bottom end. I'm using my PR350 to start as it tends to be a bit more ruthless with detail. Have a meeting tonight so tomorrow will be the trial with the LP140s.


Bob
I didn't get theTeles ordered in time for yesterday's shipment, they should arrive tomorrow (Fri) ...and on a related note the 20.7s arrived today, so I'm in the process of getting them setup. I guess the smart thing to do would be to put some hours on the 20.7s with the stock tubes, and then do a switch to the Teles. Not that the smart thing is what I'll necessarily do, but at least I can talk about it.
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  #83  
Old 09-20-2012, 08:47 PM
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Ray,

I am happy and excited for you. I bet they will sound awesome. Congratulations.
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  #84  
Old 09-20-2012, 09:29 PM
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Ray,

I am happy and excited for you. I bet they will sound awesome. Congratulations.
Thanks Joe, I sure hope they sound good, as they are so big, heavy and cumbersome to move around, it might just be easier to sell them with the house and move somewhere else if I ever decide I want new speakers.

I posted a few pix over there in the MLogan and Magnepan room.
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  #85  
Old 10-15-2012, 04:22 AM
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Here is the response from Lew at cj regarding the 6922's and issues re the GAT on tube life.

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The 1500 hour number is just a rule of thumb for pretty much any of the miniature tubes. Much more than that and you will probably find sound quality degrading (typically a softening of highs and blurring of transients). You may also find issues with the tube going noisy. In any case, there is nothing particularly unusual in the way the tubes are used in the GAT (other than the absence of feedback - but that is the same as in the ART).
All I know for a fact, I got a lot more useful life from 6922's in my prem 16 and ART pre amps. Either I am extremely unlucky or
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Old 11-02-2012, 10:31 PM
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One more cj 6922 has just gone noisy. This one barely lasted 2 months

Any ideas guys? Fwiw - my unit is 220-240 export unit and Australia is 240 vlts sometimes up to 250vlts

If this does not improve, I will be forced to look at other pre amp alternatives.

Cheers
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  #87  
Old 11-02-2012, 10:59 PM
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Originally Posted by turntable View Post
Here is the response from Lew at cj regarding the 6922's and issues re the GAT on tube life.



All I know for a fact, I got a lot more useful life from 6922's in my prem 16 and ART pre amps. Either I am extremely unlucky or
Think a little of both. I'm still on my original set of 6922 in my GAT. OTOH, how many hours a week do you put on the tubes.

Tubes are beginning to be a real PITA. Have had more of the small signal tubes failing-esp. ECC83s. Only one found reliable is the re-issue Tungsol. And I've had issues with those 6H30 "supertubes" in the ART; two died within six months. Lately have been luckier and tubes have been lasting longer.
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  #88  
Old 11-02-2012, 11:19 PM
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Originally Posted by Myles B. Astor View Post
Think a little of both. I'm still on my original set of 6922 in my GAT. OTOH, how many hours a week do you put on the tubes.

Tubes are beginning to be a real PITA. Have had more of the small signal tubes failing-esp. ECC83s. Only one found reliable is the re-issue Tungsol. And I've had issues with those 6H30 "supertubes" in the ART; two died within six months. Lately have been luckier and tubes have been lasting longer.
Hi Myles. My tubes are on around 35-40 hours per week on average.

No real issues with tubes failing except for the GAT pre amp - I have never had a small tube go on my amps.

I think you need to clone those 2 x 6922's you have on your GAT
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  #89  
Old 05-01-2013, 05:14 AM
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I had a stock EH tube go back in March. Replaced them both with Genalex Gold lions. Was on Holiday for most of April. Now the left channel has gone this time with intermittent crackling. Maybe i've just been really unlucky.
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  #90  
Old 05-01-2013, 08:52 AM
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Back in January this year, I bought a couple 6922 SIEMENS WEST GERMANY 1974 "SILVER-SHIELD" A-FRAMES.

These, knock-on-wood have been solid ever since, and they sound pretty good also.

Pretty bad when ya get 4 months from a set of tubes and it's an improvement!
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