• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Greetings from ETF!

Status
Not open for further replies.
Jump to Latest
#65
SY said:
Did you get any shots at Perseval?
Click to expand...

Cedric explaining to "Two Glasses Yaniger" precisely how champagne should be made... Also, one of the many causes of the phrase, "Je suis desolee" (yes, it was closed).
 

Attachments

  • diy0346.jpg
    diy0346.jpg
    99.5 KB · Views: 340
  • diy0373.jpg
    diy0373.jpg
    99.2 KB · Views: 333
#71
SY said:
My suggestion to that effect was not well-received by those in need. Then again, I'm a heathen.
Click to expand...

That's why I did it OUTSIDE the chruch. They must have made those walls so thick and heavy for a purpose. I'm not only a heathen but also Dutch. Easy.

Edit: Standard fine for it is euro 90 in The netherlands (approx $ 135 US), so don't do it lightly!

jd
 
Last edited:
#72
Hello,

I finished my report on the "unofficial" measurements I have done on 30 transformers for SE 300B amplifers having participated to ETF2009's "shoot-out" .

I guess it will appear soon on Triodefestival website or on Mélaudia website.

Possible request on demand to me at

jean-michel.le_cleachXmines-paristech.fr

replacing the X by arobase.

(4 Mo document)

Best regards from Paris, France

Jean-Michel Le Cléac'h



Yvesm said:
Jean Michel Le Cléac'h did some pragmatic measurements:

An externally hosted image should be here but it was not working when we last tested it.


Soon to be published I beleive.

Yves. (OPT N° 26 😎)
Click to expand...
 
#75
Interesting measurments. I saw early in this thread that common transformers like James and Silk both failed the listening test early on, and the big winner was the Audio Note Trans-300. But looking at the measurments, the AN sure doesn't look all that great, certainly no better than the James or Silk contenders (at a fraction of the AN price). I guess it goes to show that measurments don't really reveal much about musical performance.
 
#76
Hello,

You can see a table summarizing the shoot out down the page

European Triode Festival - ETF2009 Shootout

Also below the table, an interesting "tree" graph showing how the shoot-out progressed.

My own interpretation of ETF2009 shoot-out is that everytime a transformer having a frequency response showing a rising slope fight against a transformer having a flat frequency response, the rising slope transformer is the winner.

See as enlightning examples:
the fight between (LL1693/70mA) which was transformer N°30 against the AudioNote double C core transformer which was transformer N°23 (and winner of the contest).

Other examples: 28 / 12 ; 27 /20 ; 26 /1 ...


Best regards from Paris, France

Jean-Michel Le Cléac'h

smbrown said:
Interesting measurments. I saw early in this thread that common transformers like James and Silk both failed the listening test early on, and the big winner was the Audio Note Trans-300. But looking at the measurments, the AN sure doesn't look all that great, certainly no better than the James or Silk contenders (at a fraction of the AN price). I guess it goes to show that measurments don't really reveal much about musical performance.
Click to expand...
 
#78
Hello,

There is a sociogical aspect behind such shoot-out (a "group thing").

I was so astonished to see bad sounding transformers winning on what were to my ears better sounding transformers during the contest (it was a blind test) that I preferred to leave the room during the last rounds.

(every transformer having a low cut-off was dismissed and bright, simplifying or fuzzy sounding ones were preferred to neutral and detailed ones)

I hypothesize that the average listener need to be surprised by a different sound ... neutrality is not the average listener's choice in such shoot-out.

Best regards from Paris, France

Jean-Michel Le Cléac'h


Yvesm said:
If best measuring units was best sounding ones, we probably all use solid state amps🙄😀
Click to expand...
 
#79
Yvesm said:
If best measuring units was best sounding ones, we probably all use solid state amps🙄😀
Click to expand...

From a philosophy point of view, I prefer low distortion BEFORE feedback.

Since these measurements were all without feedback, I think the measurements would correlate to long term listening impressions.

Very few Solid state designs need apply.

Just one man's opinion.

Doug
 
Status
Not open for further replies.
Top Bottom