TAD (Tube Amp Doctor) 12AX7A
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TAD (Tube Amp Doctor) 12AX7A

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12AX7A, Guitar Amp Tube from TAD (Tube Amp Doctor).


2 user reviews
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TAD (Tube Amp Doctor) 12AX7A tech. sheet

  • Manufacturer: TAD (Tube Amp Doctor)
  • Model: 12AX7A
  • Category: Guitar Amp Tubes
  • Added in our database on: 12/17/2007

We have no technical specifications for this product
but your help will be much welcomed

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TAD (Tube Amp Doctor) 12AX7A user reviews

Average Score:1.0( 1/5 based on 2 reviews )
 1 user review50 %
stephanou3110/07/2012

stephanou31's review (This content has been automatically translated from French)" TubeAmpDoctor ... Thumbs!"

TAD (Tube Amp Doctor) 12AX7A
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!
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Bacbacou07/02/2012

Bacbacou's review (This content has been automatically translated from French)" dealer to avoid incompetent!!"

TAD (Tube Amp Doctor) 12AX7A
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!
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TAD (Tube Amp Doctor) 12AX7A images

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Other names: 12ax7a, 12ax 7a, 12 ax7 a

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