From the Bell Labs...

From 55 years ago this month, hot off the scanner, I present:

Longitudinal Noise in Audio Circuits (3Meg PDF)

Fantastic... My grandfather was in charge of overseeing much of what went on in the R&D at Bell Labs.

I love the "SMPE Changes Name" notice on p.35 of part two.

Cool article!
Unfortunately, it locked up my machine when I tried to print it.
3meg/11 pages = 272,727 bytes per page.

Yet more stuff for me to digest. Thank you kindly for the scan, NYD. I can't get enough! :thumb:

Love the ad on page 45 for Triad! :green:

:thumb:

Sorry about that, CJ. I'm still trying to learn how to achieve a good balance between image quality and file size when creating PDFs. I'm pretty new at this.

[quote author="NewYorkDave"]Longitudinal Noise in Audio Circuits (3Meg PDF)[/quote]
Yes, thanks, this paper I missed in my thesis ... corrected now.

xvlk

Just a note for anyone interested in this sort of thing. Given the sorry state of current "pro" audio periodicals (even the good ones assume we have no interest in how things work.....), you might be surprised at just how much great info is available in old issues of "Audio Engineering" magazine and the "Journal of the Audio Engineering Society." The first, "Audio Engineering" only last about 6 years, from about 1947 to 1953 or 1954. It then changed its name to "Audio" and it's focus to home hifi in deference to the new "Journal of the Audio Engineering Society." (I guess they thought that the pro audio biz was only big enough for one magazine?). And for anyone scared off by the current Journal of the AES, which reads more like a math textbook these days, take comfort in the fact that it was different back in the pre-digital days. Up through the mid-sixties or so, the JofAES was a much more practical, hands-on kind of magazine.

Between the 6 or 7 years of AE and the first couple of decades of the JofAES, you could spend the next decade or so doing nothing but reading great articles taking you from the very birth of audio recording up to the modern era (ca '68 or so...) I have picked up bound volumes of an entire year of issues of AE for as little as $9 on Ebay! Individual issues form the 40's and 50's show up for as little as $2. And as a bonus, the 50 year old advertisements (U47, $349, or even better, second hand listings for just absurd prices) will keep you amused for hours.

[quote author="hollywood_steve"]Given the sorry state of current "pro" audio periodicals (even the good ones assume we have no interest in how things work.....), you might be surprised at just how much great info is available in old issues of "Audio Engineering" [/quote]
Exactly.
xvlk

I have a "Bell" ITT amp here, same size as V72 .
type nr is VA18S.
No tubes , but has some big trafo's in it , and a switch 150/600 (mic impedance ?)
Mic Preamp ??

Steve! Shhhhhh.... Don't tell the whole world, man. :wink:

I only have 1950 (complete) and 1952 (minus April). I was hoping I could pick up more... :roll:

Hi Dave
I can't find the file anymore.

chrissugar

Chris,

I had to take that file down (as well as some other PDFs) because I'm already halfway through my data transfer allowance for January, and it's only the 9th.

If your email can receive attachments as large as 3Meg, PM me with your address and I'll send it directly to you.

Thank you Dave but my email is only 2 megs.
No problem, maybe someone who downloaded it will post it for a day.
Thanks.

chrissugar

i've offered space/hosting b4 for nyd but just got blank stares :roll:

I must have missed that message, DaArry.

PM me your email and I'll send you the file.

I grabbed it already

Longitudinal Noise

I'll try and get around to doin it so you can just upload whatever direct from a p/w protected webpage in the future :thumb:

Thanks!

PRR has lent me some webspace as well, which I've been using for some of the larger files, but it's always good to spread the load around.

:thumb:

Hey theres an ad for those Geoformers I have in just about everything!!!!