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METhornton

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Reply with quote  #16 
Has anyone used the MISTRAS VPACII on valve testing?
OLi

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Reply with quote  #17 
I attach the prehistoric newsflash "From bare feet method to electrocardiograph makes lab the foremost in Europe", Google translate do not apply [smile][smile][smile][smile]. Olov

 
Attached Files
pdf 20170215_090118.pdf (1.65 MB, 10 views)


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Good Vibrations since early 1950's, first patented vibrometer 1956 in the US.
http://www.vtab.se

Walt Strong

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Reply with quote  #18 
Olov,

What was the date of the publication. I recognize and have used the B&K tunable filter/analyzer. The chart recorder (or possibly Graphic Level Recorder) may be a B&K, but I try to suppress some of those memories! Your father (?) had a comprehensive lab setup, considering the available electronics at that time. A lot of good sound and vibrations work was done with that stuff that set the stage for the "modern" stuff that is used today by people that don't know how it works and sometime don't know how to use it!

Walt
OLi

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Reply with quote  #19 
I am sorry I could not find a year for the "news flash", yes those "portable" filters really paved the way for the new tech. my brother have the family issue of that magic. I think the recorder was a medical thingy for ECG or so that was converted and a US brand, it had a nick name like "pee graph" as it happily spread the ink all around. Yes he was eagerly gathering things and doing some magics with the tools available in the lab that was nick named "the rats nest". I remember both the filter and the recorder from my youth and also some thingy that supposedly was a early "automatic" piano tuner that was used to analyze vibration and also trying to tune my mothers piano that resulted in a visit from the human piano tuner. Muirhead or similar name?
Oh those were the days, no aliasing problems anywhere, yet. Olov

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Good Vibrations since early 1950's, first patented vibrometer 1956 in the US.
http://www.vtab.se
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