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Old 21st May 2007, 07:19 PM   #1
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Default best value/performance ECC83 on market

Any advice ? JJ Svets Ei ..Is there really that much difference in'em ?

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Old 21st May 2007, 09:12 PM   #2
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Hi Richy,

it would be very helful you would supply some criteria what you consider to be "performance". I suppose, in this regard you don´t mean µ, rp and gm as stated in the spec sheet?

Tom
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Old 21st May 2007, 09:38 PM   #3
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Sorry bit hasty on orig....

I'm after rep makes with known low microphonics...and can take roustabout treatment..pop squeaks and noises and not prepared to pay through the roof. Ironically the lowest noise triode in my collection is the famed ECC807 which regretably isn't around any more. I get best quietest peformance with ECC83 tubes configured as simple cathode follower preamp drive or filter aplications.

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Old 21st May 2007, 11:08 PM   #4
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Rich,

Try the EH and TungSol "reissue" variants. Both are New Sensor items made at the Saratov, Russia plant.

A 3rd New Sensor/Saratov product, the Sovtek 12AX7LPS, is terrific in phono stages, as it's clean, quiet, and uncolored. However, the long plates make the 'LPS somewhat vulnerable to microphonics in guitar amp service.
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Old 22nd May 2007, 11:13 AM   #5
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I have a couple of the newer ECC83s on my shelf -

The Shuguang 12AX7C has been very quiet and straight from the box they have been very consistent... you may also want to look at the JJ ECC83 with the small plates (there is also a ECC803 version).
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Old 22nd May 2007, 12:29 PM   #6
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Quote:
Originally posted by kstagger
I have a couple of the newer ECC83s on my shelf -

The Shuguang 12AX7C has been very quiet and straight from the box they have been very consistent... you may also want to look at the JJ ECC83 with the small plates (there is also a ECC803 version).
Beware! The JJ ECC83S is very prone to noise and microphonics. It also has a tendency to have weak sections. If you use them get them from someone who tests them very thoroughly - which is not that easy to do since a lot of vendors stopped carrying it. My last batch had 40% rejects, which is why it was my last batch.
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Old 22nd May 2007, 12:44 PM   #7
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The 'Tungsol' small black plate one from Saratov is the one that sounded best to me than the other new ones. Its at least in the mellow long lost vein. Most of the new ones suffer coldness.
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Old 22nd May 2007, 12:51 PM   #8
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Quote:
Originally posted by Jim McShane


Beware! The JJ ECC83S is very prone to noise and microphonics. It also has a tendency to have weak sections. If you use them get them from someone who tests them very thoroughly - which is not that easy to do since a lot of vendors stopped carrying it. My last batch had 40% rejects, which is why it was my last batch.

good to know - I have to admit I haven't plugged them into anything yet (I have a big stash of 'x7s) - especially after one of my friends reported less than enjoyable sonics with his phono stage. I do know that some guitarists like 'em for their 'bite' - they are advertised for their low microphonics due to the small plate size - go figure.
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Old 22nd May 2007, 02:34 PM   #9
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The newer Russian 5751's are my favorite. Get them on Ebay. Try a few!
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Old 22nd May 2007, 03:27 PM   #10
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Quote:
Originally posted by Jim McShane


Beware! The JJ ECC83S is very prone to noise and microphonics. It also has a tendency to have weak sections. If you use them get them from someone who tests them very thoroughly - which is not that easy to do since a lot of vendors stopped carrying it. My last batch had 40% rejects, which is why it was my last batch.

That made me curious, I have some JJ ECC83 S in my phono stage, turned the volume to max (SE EL 84 -no power monster..) and tapped the tubes with my finger- I could hardly hear it.

But I've had two faulty tubes too
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