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Antique Hi-Fi Archive Connecticut Audio History

UPDATED: Cook Labs Test Records Circa 1952

CookLabs_LP10_CoverSeveral weeks ago I ran an article on Emory Cook, binaural recording pioneer and Connecticut entrepreneur.  Click here to read that piece.  T.F. contributed the wonderful and very-hard-to-find resources for that article, and we follow up today with some scans of a notable early Cook Labs product: the LP10 test-record.  You can download several of these resources here:

Emery Cook – Test Records brochure

Emery Cook – Series 10LP test record sleeve

Emery Cook – Series 10LP data sheet

Emery Cook – Series 10 Test Record Technical Bulletin

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I have a small collection of Test LPs myself, but I know nothing about the history and development of this type of product. T.F. graciously provided some background in the comments section, and I have reproduced that text here to facilitate easier reading:

“The way I understand the history (of test records), both RCA and Columbia produced microgroove test records when they developed their microgroove formats (45RPM 7″ disk for RCA, 12″ and 10” 33 RPM disks for Columbia). But these test disks were for professional mastering places, playback equipment designers and manufacturers, etc.

The Cook record seems to have been aimed at both professionals and serious hobbyists who were building and/or setting up phono playback equipment. Cook was also clever with marketing, this record proved the quality of his cutting equipment. In the early days of the microgroove, I don’t think there were very many other options for the hobbyist beyond the Cook record.

In 1954, when the industry adopted the RIAA curve, a bunch of semi-professional “test and demo” records came along, sometimes including calibrated test tones and sometimes just including “tracking challenge” music and sound effects. There was another bevvy of “test record” releases when the stereo LP debuted in 1958. In the 70s, we had more.

From the early days of the stereo LP, the CBS Labs test records were the standard device for designing and building playback equipment.  The Command Stereo Test Record was made at Fine Recording. It includes calibrated tones to set level and check frequency response, as well as a phase test and a silent groove to test for rumble. Side two is a narrated tour of some Command pop tunes pointing out what to listen for, to determine if the cartridge is tracking correctly.

The most recent calibrated test record is from Analogue Productions. Its levels test out to be accurately described and it is well calibrated to the RIAA curve, so it’s quite useful for setting levels, balance and testing the frequency response of a cartridge. It’s also got a useful test for wow and flutter and a speed-check tone (which shows that many of the modern lower-priced belt-drive turntables don’t hold 33.3RPM due to cheap motors and cheap platter bearings). The Analogue Productions record is very well manufactured, on quite and pretty much tick-free vinyl.

One big thing that test records have shown me is how many cartridges have uneven channel-to-channel levels and sometimes uneven frequency response. In the lower priced world, you can’t beat the Denon DL-110, it’s super-flat and nearly identical channel-to-channel (3 different units tested, manufactured over a 10-year period).

Categories
Technical

Hi-Gain PA Amplifier Circa 1950

HiGainPA_AmpFrom Radio-Electronics, 1950, comes this circuit by one James Rundo.  Download the article by clicking here:

DOWNLOAD: HiGainPA_Amp_1950

SchematicAbove, the circuit.  The front-end is set up for very low-impedance unbalanced mics that mix through a resistor network through a single  (VERY) high ratio input transformer; so that bit is not very useful. What makes this piece of interest is the unusual tone control scheme.  See the article for the details.  Could make for a really unique guitar or studio bass amp.

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Uncategorized

An Absurd Tape Duplication Scheme c. 1950

PreviewScreenSnapz002that’s right, git all up in that shit MOTHAFUKKA

Ahem.  From RADIO-ELECTRONICS circa 1950 comes this piece on a forgotten cul-de-sac of audio production, the ‘magnetic-transfer-field’ method of duplicating analog audiotape.  WTF?   Read on and learn, dudes (VIA is there a lady?  Do any women read this nonsense?  if so, pls speak up thanks).

DOWNLOAD: MagneticTapeDupe1950

PreviewScreenSnapz001I was in Marin county this past weekend and I met some pretty interesting folks at the yard-sales.  First, a dude who made a lot of the DigiRack presets in protools, and hours later, a very old fellow who used to build bridges+road by day and then service musical equipment by night.  Hooked me up with some amazing ancient tech-data books.  fascinating sorta shit/sorta folks that I don’t seem to find too often out here East.  Anyhow…  point is…  there are so, so, so many weird little roads of audio-production that have not been traveled by plug-in designers…  so many paths still unexplored digitally. Every weird dead-end of commercial audio production awaits a potential rebirth in the plug-in age…  Via: someone make a magnetic-transfer-field simulator already?

Categories
Recording Studio History

Les Paul’s Home Eight-Track Studio Circa 1958

PreviewScreenSnapz001Les Paul discusses his DIY’d home eight-track studio in RADIO ELECTRONICS 1958.  Thanks to JF for providing this scan.

DOWNLOAD: Les_Paul_Radio_Electronics_10_1958_another_copy

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Uncategorized

Electrodyne circa 1969

Electrodyne_ACC_1204_Console_1968

Some random bits of Electrodyne kit that I came across…  Above, their ACC-1204…  looks pretty neat… anyone?

 

Electrodyne_Console_strips_1968 Electrodyne_strips_1969

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Antique Hi-Fi Archive Technical

Belgian Hi Fi Amp circa 1950

PreviewScreenSnapz001PreviewScreenSnapz002From Radio-Electronics March 1950 comes this piece.  Download a PDF with high-res scans by clicking the link below:

BelgianAmp1950

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Uncategorized

Live DJ Set: Wednesday March 06: New Haven CT

SwayMarchHello y’all… Once again I will be dusting off ye old 70s soul and punk vinyl at FIREHOUSE 12, New Haven CT, alongside my good old friend JBW aka SWAY…  We’re on tomorrow, Wednesday the sixth, from 9PM til one.  Come on down to the best bar in CT and hear some (lost)(never were)(prolly should-have-been) classics.

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Uncategorized

Just what I need. Another Collection.

TubeBoxCollectionFrom “The Old Timer’s Bulletin” Vol 33., #1: a short piece on the minor hobby of collecting and displaying antique tube BOXES.  Not the tubes, mind you, just the boxes.  Fast forward to me in 30 years…

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I recently bought a huge pile of the old radio fanzines; hundreds, probably, from the family of a deceased collector, likely; and while Old Radios just aren’t ‘my thing,’ the ‘zines are great, really charming+heartfelt lil snapshots of collector-life.  The only parallel I have seen in the musical-gear world is Vintage Guitar magazine, which is eh so-so.  I have subscribed and unsubscibed to VG a few times now, it’s not bad, and the price is certainly right, but I dunno it just sorta misses the mark… maybe it’s just too dry…  Anyhow, in this era of online-everything, are there any noteable audio and/or instrument print-fanzines still in production?  Anything worth checking out?  Let us know…

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Uncategorized

1982: The Age Of Digital Audio Begins (REVISED)

Mitsubishi_x800_1980Above: The Mitsubishi X800, an early digital multitrack audio recorder (1980).

What better way to end 70’s month at PS dot com than a to take a quick look forward, from the vantage point of 1982, at the new era of digital audio.  Below: the very-smart John Woram offers an editorial in DB magazine, 1982, on the new age to come.  Although digital multitracking was already widely-used in high-end music production by 1982, that year saw the introduction of the first consumer digital audio playback devices, the CD player.  For the first time, the cycle could be complete: you, as the consumer, could hear exactly (well, speakers and room acoustics notwithstanding) what the producer heard in the mastering suite.  Audio, which had been a chimerical, elusive magnetic or physical/mechanical fluctuation for over 100 years had been successfully reduced to an (at least acceptable) data stream.   Let’s see what Woram had to say…

JohnWoram_DB_Feb1982It’s not an easy thing to imagine the future.  I see this in practice every year with my Visual Semiotics students when I issue an assignment that requires them to re-create a current print advert as it might appear 50 years from now.  The students who manage to do it successfully are able to grasp that both the technology and the aesthetics of the culture will shift, and that these shifts need to be related in some fundamental way.  Of course, they could still end up being very wrong about the particular outcome;  only time will tell.  But a relationship between tools, technique, and form is fundamental to human endeavor.  Woram seems to have very accurately predicted the state of professional audio circa 1995 or so.  It’s now 2013.   Where will be be in twenty years?

Back to that Mitsu’ pictured at the head of the article.  Anecdotal information that I gleaned from engineers I have worked with over the years had somehow created the impression that these machines marked the introduction of widespread digital multitracking, and my admittedly cursory research seemed to confirm that.  T. Fine wrote in to offer a more detailed account based on his ARSC article published in 2008.  Click here to read the complete article entitled THE DAWN OF COMMERCIAL DIGITAL RECORDING.  Fine:

“The first widely-used digital multitrack system was 3M’s,  at first by Warner Brothers’ studios out in California. Ry Cooder’s  “Bop Til You Drop” was the first all-digital rock album, recorded on  the 3M system. Many followed including Ricky Lee Jones’ “Pirates”  and others. Fleetwood Mac did “Tusk” on the 3M recorder, too.  The 3M system was also used by Columbia for classical recordings and  by Deutsche Gramophone. Soundstream was the first AMERICAN digital audio recorder, but not  the first. Denon had them beat by more than 5 years.  All of the early players — Denon, Soundstream and 3M — faded by  the mid-80s. RCA was heavily invested in Soundstream and bought most  of the remaining equipment when the company went out of business. I  don’t know if 3M made 100 total digital recorders. The things cost a  fortune.”

Categories
Microphones

A Few Interesting Mics of the 70s

Shure_SM53_1972Today at PS dot com: 70’s month nears its close with a quick look at some promising but lesser-known mics of the 70s.  If you are using any of these pieces in the studio these days, drop us a line and weigh in.  above: the Shure SM53, a high-end dynamic cardiod that seems to maybe have been Shure’s answer to the RE15?  I’ve been trying to pick one these up on eBay, no luck yet… anyone?

EV_RE15_1975And speaking of the RE15…  after watching the prices slowly rise on eBay for the past year, I finally picked up one of these..  expect some audio clips/shoot-out here soon.  I always ignored these in the past, i figured, I have an RE20, what’s the point…  but I finally had to know.  I recently worked with a contractor/tech from a major live-sound company who had 1/2 the stage mic’d with these things, swears by ’em…  anyway, I am super-curious.  They are apparently very hi-fi with very accurate off-axis response.  More to come…

Turner_TC10_1972While on the subject of dynamic mics…  above, the Turner Model 10 circa 1972.  Those of you who’ve been following PS for a while will know that I am a big fan of obscure Turner models, especially the flagship models like the 510…  I recently bought my second 510 for Gold Coast Recorders and I have to sadly report that it is not as awesome as the example I have had for years… Anyway, the Model 10 seems to have been a replacement for the 500/510 series…  there is a super-rare Model 11 (likely the ‘selected’ hi-fi version of the Model 10) on eBay right now for really cheap…  might be a good purchase for anyone looking for more interesting dynmics mics…

AKG_D124_1972Above, the AKG D190 and D124!  Finally some info on the D124…  these turn up in my old 70s AKG catalogs (most of which you can download here on PS dot com), and I actually use this as the console talkback mic at GCR, but I had not realized that it was the replacement for the D-24.  The D-124 is an amazing little piece of engineering, very nice smooth sound and incredibly small in size.  D-190s are much more common, I tend to see these on CRList quite often.

Shure_SM5_1969Above: Shure SM5 circa 1969.  I love the similar SM7, use it regularly, it seems to have become somewhat of a standard-bearer vocal mic these days…  artists actually ask for it in the studio the same way some will ask for an 87 or 47 or 58….  The SM5 is much less common, no longer made, and consequently extremely expensive.  Are any of y’all using SM5s for music or vocal recording these days?  Thoughts?

Sony_Mics_1969Above: Sony ‘Superscope’ branded C-77, C-37, and C-55 circa 1969.  A C-37 or C-37 Fet is very high on my wish-list…  Never used any of these models.. anyone?

EV_RE55_1969Above: the Electrovoice RE55 is introduced (1969).  Interesting to see that the RE55 was the successor to the 655.  I have a pair of 655 at GCR, very very old pair circa 1950, and wow they sound great.  Fairly high self-noise for a dynamic, but for drum overheads it’s never a problem.  Anyone using the RE55?  Seem pretty uncommon…

AKG_C412_mic_1972Above: The AKG 412 circa 1972.  Seems to be the final evolution of the C12 prior to introduction of the still-standard 414.  Anyone using a 412?  Is it significantly different than a circa 70s 414?