Bruel & Kjaer 2107 Frequency Analyzer

Frankly, you will do a far better, more useful and more accurate job with a sound card in a PC. This is really of historic interest only.

d

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Pearce Consulting
http://www.pearce.uk.com

snipped-for-privacy@nospam.com (Don Pearce) in rec.audio.tech:

Well thanks Don!

It really was just out of interest, (but I am danger of collecting too much old stuff already, like valve tech gear & ham transceivers, so appreciated!) and I'm already interested in the possibilities of the soundcards I have. Ta!

RdM

Adding to Don's very apposite comment, try the RightMark Audio Analyser software. It works with any sound card and provides either live measurements or you can record the tests and analyse off-line, so to speak.

S.

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http://audiopages.googlepages.com

"Serge Auckland" in rec.audio.tubes:

I have downloaded it recently on a networked XP PC but not yet installed it. [and lots of other programs!] I appreciate the advice, and am already following it, but I still (for curiousities sake) wondered how much it did.

Museum material? Or is that even unkind to the museum ... ?

I thought I might link these comments back to the auction:- for the vendor!

And viewers.

That's really neat, I know something about this instrument but not much anymore. Forty odd years ago when I was a young wet behind the ears audio equipment designer we had a Bruel & Kjaer test system of which this instrument was one part, unfortunately I have forgotten probably

98% of what I once knew. The system consisted of at least three parts, maybe more that I have forgotten about, all mounted in a rack. First there was an oscillator like this one, second there was a tracking filter which had a fractional octave bandwidth, although I forget the fraction, and finally there was a chart recorder. These parts were all linked together by a chain drive of some sort IIRC so that they all tracked one another for making various measurements. The simplest test would be a frequency response run using the oscillator and the chart recorder. The chart recorder also worked with a CBS test record for testing phono pickups, and I used it in this mode to test a lot of phono pickups.

I'm not sure of what use what the oscillator by itself would be, which is what the auction appears to be for?

Regards,

John Byrns

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Surf my web pages at,  http://fmamradios.com/

I don't know this actual equipment, and the pic isn't high enough res. to tell, but it looks like a combined oscillator and audio level measuring meter - rather like the Ferrograph test set that we lesser mortals got to play with. Which I still use for many things - despite modern devices being smaller and more accurate. At least it doesn't have a keyboard or mouse. ;-)

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*Remember not to forget that which you do not need to know.*

    Dave Plowman        dave@davenoise.co.uk           London SW
                  To e-mail, change noise into sound.

In message , "Dave Plowman (News)" writes

It's combined oscillator and selective-level-meter. As Don said, it's only of historic interest now, but like most early B&K kit, the build quality is superb.

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Chris Morriss

You say only of historic interest but it might be easier to use on the bench than setting up a PC there.

I find my Ferrograph very useful for all number of things - after all it was used for audio setting up and measurement in the '80s and those standards are still good enough for many things today. Not lab standard measurement for sure, but day to day stuff. And it's built like a tank - unlike a PC sound card. I'd say the same applies to the B&K.

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*What was the best thing before sliced bread?

    Dave Plowman        dave@davenoise.co.uk           London SW
                  To e-mail, change noise into sound.

Analyzer

It's a well constructed, benchworthy and easy to use LF selective level voltmeter and oscillator and would be a good acquisition for a hobbyist with some bench space. I'd like to have it myself but the shipping would be killer.