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Tech. sheet
- Manufacturer: TAD (Tube Amp Doctor)
- Model: 12AX7A
- Category: Guitar Amp Tubes
- Package weight:17 g
- Other names:12ax7a, 12ax 7a, 12 ax7 a
We have no technical specifications for this product
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User reviews
1.0/52 reviews
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stephanou31TubeAmpDoctor ... Thumbs!
Published on 10/07/12 at 01:11 (This content has been automatically translated from French)TubeAmpDoctor ... they are incompetent or crooks!?
After ordering online, time passes and nothing happens.
I mean their mail several times that I have received nothing, after a month and they keep telling me that the period of the extension can be long ...
However, my girlfriend lives in Sweden and one mail arrives in the week ... find the error ...
I have not been able to get a refund ... (Anita, if you look at us ...)
So just ... AVOID!!! unless you have time and money to throw out the window!
After ordering online, time passes and nothing happens.
I mean their mail several times that I have received nothing, after a month and they keep telling me that the period of the extension can be long ...
However, my girlfriend lives in Sweden and one mail arrives in the week ... find the error ...
I have not been able to get a refund ... (Anita, if you look at us ...)
So just ... AVOID!!! unless you have time and money to throw out the window!
53
»
Bacbacoudealer to avoid incompetent!!
Published on 07/02/12 at 02:48 (This content has been automatically translated from French)I just received my tubes, four 12AX7 and four ground-tung ECCC83s JJ.
Here are the results of test on my metrix mA (Ua = 250V/Ug =-2V)
JJ tubes: 1.35 / 1.5 1.25 / 1.3 1.3 / 1.0 1.5 / 1.05
tungsol tubes: 0.8 / 1.0 0.9 / 1.05 1.2 / 0.95 0.9 / 1.3
in this command, as all JJ tubes seems almost OK (apart from two tubes), for both ground-tung, have is still good below the specified rating ...
to summarize: The 4-pipe-ground tung Suck. resell the quality of tubes is unacceptable! Normally, these are tubes that have to go in the trash right out of the production line!
I refer the tubes and I demand tubes having at least the specified rating.
"I just want test tubes as good...…
Here are the results of test on my metrix mA (Ua = 250V/Ug =-2V)
JJ tubes: 1.35 / 1.5 1.25 / 1.3 1.3 / 1.0 1.5 / 1.05
tungsol tubes: 0.8 / 1.0 0.9 / 1.05 1.2 / 0.95 0.9 / 1.3
in this command, as all JJ tubes seems almost OK (apart from two tubes), for both ground-tung, have is still good below the specified rating ...
to summarize: The 4-pipe-ground tung Suck. resell the quality of tubes is unacceptable! Normally, these are tubes that have to go in the trash right out of the production line!
I refer the tubes and I demand tubes having at least the specified rating.
"I just want test tubes as good...…
Read more
I just received my tubes, four 12AX7 and four ground-tung ECCC83s JJ.
Here are the results of test on my metrix mA (Ua = 250V/Ug =-2V)
JJ tubes: 1.35 / 1.5 1.25 / 1.3 1.3 / 1.0 1.5 / 1.05
tungsol tubes: 0.8 / 1.0 0.9 / 1.05 1.2 / 0.95 0.9 / 1.3
in this command, as all JJ tubes seems almost OK (apart from two tubes), for both ground-tung, have is still good below the specified rating ...
to summarize: The 4-pipe-ground tung Suck. resell the quality of tubes is unacceptable! Normally, these are tubes that have to go in the trash right out of the production line!
I refer the tubes and I demand tubes having at least the specified rating.
"I just want test tubes as good as the nominal value or more (250V/Ug Ua =-2V / I = 1.2 mA or more), I Do not Need balanced triode matching."
response to ADP:
I spoke to our technician Because of your request.
He Said That we do not test our tubes in this way,
This Means That We Could you select the tubes for
humming, microphonics and balanced system, but not for this.
So obviously, they are able to match the triodes, select low noise tube, but unable to select tubes with nominal characteristics: there's the big foutage of mouth, would perhaps have to take them a few courses on tubes ...
An address to remember, for sure.
I was so refunded, less shipping costs anyway (15 €), and costs of returning to my office ... I am disgusted!
Here are the results of test on my metrix mA (Ua = 250V/Ug =-2V)
JJ tubes: 1.35 / 1.5 1.25 / 1.3 1.3 / 1.0 1.5 / 1.05
tungsol tubes: 0.8 / 1.0 0.9 / 1.05 1.2 / 0.95 0.9 / 1.3
in this command, as all JJ tubes seems almost OK (apart from two tubes), for both ground-tung, have is still good below the specified rating ...
to summarize: The 4-pipe-ground tung Suck. resell the quality of tubes is unacceptable! Normally, these are tubes that have to go in the trash right out of the production line!
I refer the tubes and I demand tubes having at least the specified rating.
"I just want test tubes as good as the nominal value or more (250V/Ug Ua =-2V / I = 1.2 mA or more), I Do not Need balanced triode matching."
response to ADP:
I spoke to our technician Because of your request.
He Said That we do not test our tubes in this way,
This Means That We Could you select the tubes for
humming, microphonics and balanced system, but not for this.
So obviously, they are able to match the triodes, select low noise tube, but unable to select tubes with nominal characteristics: there's the big foutage of mouth, would perhaps have to take them a few courses on tubes ...
An address to remember, for sure.
I was so refunded, less shipping costs anyway (15 €), and costs of returning to my office ... I am disgusted!
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Where to buy 12AX7A?
Less
Best new price
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Prix TAD (Tube Amp Doctor) 12AX7A
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