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turntable 12-21-2011 06:22 PM

Is the GAT / ET5 hard on tubes?
 
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?

Rafale 12-21-2011 06:54 PM

Shane.....I have never had problems with 6922 sovtek / EH on my GAT
I have at present Mullard Holland NOS and I wait for EAT ECC88... no problem of noise
You should speak about it to Ed

turntable 12-21-2011 07:19 PM

Philippe

I have friend in the UK that has had similar problems, however not recently with expensive aperex tubes

The GAT still plays music fine, but the increased tube rush is irritating

Rafale 12-21-2011 07:44 PM

Quote:

Originally Posted by turntable (Post 242825)
Philippe

I have friend in the UK that has had similar problems, however not recently with expensive aperex tubes

The GAT still plays music fine, but the increased tube rush is irritating

strange :scratch2 :I will inform you regarding the EAT, they arrive next week

Rayooo 12-21-2011 07:49 PM

I've had three tube failures in last couple years, two in ET-3 SE.
One of the failures was the stock CJ tube (Noisy) 2nd in ET-3SE was a Mullard I believe from Tube Depot.

3rd was earlier this year, EAT in ET-5.

In each case, the tube was good one minute and failed during use, went immediately noisy and/or very microphonic. My "assumption" is that each was simply a failure and not affected by the specific use by CJ.. but I surely don't know that for a fact.

...and I don't play heavy-metal music. :)

PHC1 12-21-2011 07:51 PM

Shane, have you tried Genalex Gold Lion 6922? It is supposed to be the best quality. New Sensor::Product HighLight

Puma Cat 12-21-2011 08:04 PM

Quote:

Originally Posted by turntable (Post 242784)
Anyone else had any tube noise issues?

Nope.

Joe Appierto 12-21-2011 08:44 PM

Quote:

Originally Posted by turntable (Post 242784)
I have had my GAT for several months and I am on my third set of factory 6922 tubes

Anyone else had any tube noise issues?

Shane,

I had a set of Amperex 6922s become microphonic in about 200-250 hours use in a Pr 17 LS but that was it. Never had the problem at all in my 16 LS2 but for one reason or another I now typically use 6DJ8s, 7DJ8s and 7308s not 6922s. And never had tubes becomes noisy although I've replaced some that were just getting to the end of their time and becoming kind of dull sounding.

Regards,
Joe

turntable 12-22-2011 01:03 AM

Quote:

Originally Posted by PHC1 (Post 242843)
Shane, have you tried Genalex Gold Lion 6922? It is supposed to be the best quality. New Sensor::Product HighLight

Serge, Gotta get past my 1000 hours teflon burnin playtime before I start experimenting on different tubes - especially expensive ones. :yes:

That will be on this list as with only two required, not that big an outlay.

turntable 12-22-2011 01:06 AM

Quote:

Originally Posted by Joe Appierto (Post 242876)
Shane,

I had a set of Amperex 6922s become microphonic in about 200-250 hours use in a Pr 17 LS but that was it. Never had the problem at all in my 16 LS2 but for one reason or another I now typically use 6DJ8s, 7DJ8s and 7308s not 6922s. And never had tubes becomes noisy although I've replaced some that were just getting to the end of their time and becoming kind of dull sounding.

Regards,
Joe

Hi Joe, great to see you join us cj fans here. :thumbsup:

maybe I am being fussy? the tubes are not microphonic or anything. the tube rush comiong out of the tweeter is louder that it should be, and louder on one channel than the other. I put in another cj EH 6922 and the noise reduces back to normal.

Not something you can even hear from the listening chair unless you are looking for it.

But in the new year, it will be time to try a few alternatives and have some fun.


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