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Earmax Anniversary - Page 12

post #166 of 210
11/5/05 at 1:25pm
Quote:
Originally Posted by ken36
Is it a good idea going to the 12au7 rather than the 12at7? Is it dangerous?
There is no right answer to this question. These tubes have identical pinouts and filament voltages, so in that sense they are compatible. However, they have different gain, and I'd have to look at other electrical parameters. In many circuits they can be used interchangeably. In circuits that are designed for a specific tube, interchanging them might not work. The question can only be answered on a circuit by circuit basis. However, if you make the change and it sounds good, you're not hurting anything and can make the change if you want. If the tube is not compatible, it's usually audible (if you hear distortion, don't do it).
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post #167 of 210
11/5/05 at 3:22pm
Thanks a lot Hirsch. This one weighed heavily.
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post #168 of 210
11/5/05 at 4:45pm
Trying again

Did someone tried successfully 12AU7 or 12AX7 on the EarMax AE?
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post #169 of 210
11/5/05 at 5:21pm
Quote:
Originally Posted by Slow_aetk
Trying again

Did someone tried successfully 12AU7 or 12AX7 on the EarMax AE?
12AU7 works fine. I tried an Electro Harmonix 12AU7
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post #170 of 210
11/5/05 at 8:24pm
Thread Starter 
The 12AX7 works fine as well.
I seated a Sovtek 12AX7 on the EarMax AE.
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post #171 of 210
11/6/05 at 6:59am
Neil, Edison,

Great info, more choice for us!

Did you notice significant improvements of differences in using 12AU7 or 12AX7 instead of the 12AT7?
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post #172 of 210
11/6/05 at 5:00pm
I did found the following link. A pretty good attempt at describing how do various tubes should sound.

http://www.audioasylum.com/scripts/d...oes-tubes.html
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post #173 of 210
11/6/05 at 5:45pm
Nice! Thanks for the link!
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post #174 of 210
11/6/05 at 6:40pm
Thread Starter 
Quote:
Originally Posted by Slow_aetk
Neil, Edison,

Great info, more choice for us!

Did you notice significant improvements of differences in using 12AU7 or 12AX7 instead of the 12AT7?
Hey,
This is one thing I want to know too.
Since I havn't 12AU7, 12AX7 or 12AT7 at the same brand, I can't test it. I will prefer 12AT7 as a priority.
The link is as great as the Electro Harmonix tubes.
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post #175 of 210
11/6/05 at 10:50pm
anybody,

How do the 12au7 and 12ax7 tubes effect the sound? Does anyone know?
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post #176 of 210
11/6/05 at 11:33pm
12AX7 amplification factor of 100
5751 amplification factor of 70
12AU7 amplification factor of 20
12AT7 amplification factor of 60

Tube Roll at your own risk.
These derivatives should be compatible for each tube group. Some might not sound good or work well but I do not believe any are incompatible.

12AX7:
12AX7A, 12AX7WA, 12DF7, 12DT7, 12DW7, 7025, 7025A, 12AD7*, 12AU7§, 12AU7A§, 12AY7, 12BZ7*, 12DM7*, 5751*, 5751WA*, 6057, 6072*, 6681, 7494, 7729


12AU7:
12AU7A, 12AU7W, 12AU7WA, 5814*, 5814A, 5814WA*, 5963, 6067, 6189, 6680, 7316, 7489, 7730


12AT7:
12AT7WA, 12AT7WB, 6060, 6201, 6211, 6671, 6679, 7492, 7728, A2900, 12AV7, 12AZ7*, 12AZ7A*


Mitch
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post #177 of 210
11/7/05 at 10:05am
Tube Roll at your own risk.

The price of mental health is facing reality. I knew this, but I needed to be reminded.
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post #178 of 210
11/7/05 at 2:25pm
OK, guys. Is it fair to say the 12AT7, 12AU7 and the 12AX7 are interchangeable in the EMP AE? If so, what are your conclusions?
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post #179 of 210
11/7/05 at 3:20pm
Quote:
Originally Posted by braillediver
12AX7 amplification factor of 100
5751 amplification factor of 70
12AU7 amplification factor of 20
12AT7 amplification factor of 60

Tube Roll at your own risk.
These derivatives should be compatible for each tube group. Some might not sound good or work well but I do not believe any are incompatible.
Some types need to be added (and maybe there are even more) -- without guarantee:

12AX7:
12AX7A, 12AX7WA, 12DF7, 12DT7, 12DW7, 7025, 7025A, 12AD7*, 12AU7§, 12AU7A§, 12AY7, 12BZ7*, 12DM7*, 5751*, 5751WA*, 6057, 6072*, 6681, 7494, 7729, ECC83, E83CC, ECC803(S), E803CC, ECC863, 12AX7R, 12AX7S, CV10319, CV492, 5721, 6L13, 7025, 7382, B339, CK5751, CV3970, CV4004, CV4017, CV8156, CV8222, CV8312, E2164, M8137, QB339.

12AU7:
12AU7A, 12AU7W, 12AU7WA, 5814*, 5814A, 5814WA*, 5963, 6067, 6189, 6680, 7316, 7489, 7730, ECC82, E82CC, ECC802(S), CV10323, CV10666, CV4003, CV491, CV8155, CV8221, 6CC40, B329, B749, CK5814, CV3900, CV4016, CV9092, E2163, M8136.

12AT7:
12AT7WA, 12AT7WB, 6060, 6201, 6211, 6671, 6679, 7492, 7728, A2900, 12AV7, 12AZ7*, 12AZ7A*, 12AT7WC, ECC81, E81CC, ECC801(S), E801CC, CV4024, CV10662, CV455, CV8154, CV9859, 7492, M8162, QA2406, QA2407, QS2406, B152, B309, B739, CC81E, CK6201, E2157.

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post #180 of 210
11/8/05 at 10:57am
For the record: Put 50 hours on the EMP AE stock tubes. They sucked when I started. They suck now. Strange. Went back to the EHg tubes. Waiting for some Teles. Totally confused on the Mullards.
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