Categories
History Icons Manufacturers Publications

Saul Marantz and The Roots of Great Design

A few years ago I bought a pile of old electronic parts from an anonymous junk dealer.  Random stuff- 5 lbs of crappy ¼” jacks,  some VU meters, a box of giant knobs, etc.  The dealer also had a box of old AES Journals.

The AES, or Audio Engineering Society, is just what the name suggests.  A professional organization for those who work in audio.   I don’t know what the main focus of the AES is nowadays (i am not a member), but in the early 1960s it was very technical.  Not so much an organization for people who engineer audio (IE., use equipment to manipulate audio signals), but rather an organization for people who engineer the equipment that recording engineers would then use to manipulate audio.  Let’s put it this way:  there’s a lot of math involved.  Here’s a contents page from 1964.  This issue was devoted to tape-recorder noise reduction. As in, designing the circuits.  Not just building or using them.

There are some more accessible articles, like this piece detailing a custom-made audio console:

…and, of course, all those great old advertisements.

Anyhow, when i had the chance to examine the circa-1970 AES journals that the dealer sold me, it became apparent that they had once been the property of one Saul Marantz.

I knew the name Marantz as it applies to audio equipment – my wife in fact has a complete (circa 1995) Marantz hi-fi system in her studio – but i knew a little about the man.   Turns out he was a fascinating character.

From the NYtimes: “ A man of many parts — photographer, classical guitarist, graphics designer, collector of Chinese and Japanese art — Mr. Marantz was fascinated by electronics from his boyhood days in Brooklyn. His passion for music led to his first attempts at building audio components…. After service in the Army during World War II, Mr. Marantz and his wife, Jean Dickey Marantz, settled in Kew Gardens, Queens. One day in 1945, he decided to rip the radio out of his 1940 Mercury, where he rarely listened to it, and put it to more practical use in his house. But that transplant required building additional electronics to make the radio work indoors. Such was the hook that snared Mr. Marantz for life.”

Saul Marantz was a  career graphic designer at the time.  He left this career once his Hi -Fi components (co-designed with engineer Sidney Smith) took off.

Learning that S. Marantz had been a graphic designer (and collector of Japanese art) really put the puzzle together for me.  The extremely elegant appearance of all the Marantz products (until he left the company in 1968, at least) always made a big impression on me.  Early Marantz hardware was high-end, sure – with prices and specs close to McIntosh pieces – but their visual design is in a league buy itself.

(web source)

(web source)

In another of the Marantz AES journals, S. Marantz receives an achievement award for outstanding contribution to consumer audio equipment.

The ‘classic’ Marantz designs were introduced between 1950 and 1964.  After that point, it became a ‘name-only’ company.  The more recent Marantz-branded products are of good quality, for what’s it worth.

How important are visuals to your appreciation of audio hardware?  How important the tactile interface with the devices?

When everything is reduced (enhanced??) to a touch screen, with the visual experience of audio tools be heightened, or reduced?

Categories
History Technical

The Limits of Control

How much control over their audio do music-listeners want and need? At the very least, we can agree that they need to be able to turn the sound on and off.  Control over volume (level) is probably the next most important thing.  But beyond that… what is really necessary, what is really desired, and what is just marketing?

I came across this RCA  vacuum-tube reverberation system this past weekend at the flea market.  It was new, in the box, never removed from its packaging.  Likely an ill-advised Christmas gift from the Eisenhower era.   It cost me one dollar.

This device was sold as an add-on to certain RCA stereo hi-fi consoles of the late 1950s.  Owners of these certain consoles could purchase the unit, open up their console, install a few metal boxes, plug in some cable harnesses… and voila.

The listener would then be able to selectively add reverb (ie., artificial echo) to whatever audio they were listening to.  Overall, the whole operation is about as difficult as installing your own car stereo.

This concept seems patently absurd to me, and i love reverb.  I love reverb on my guitar amp, i love the reverb chambers and plug-ins that I use in the studio…  but the idea of adding reverb to a recording which has already been mixed a certain way…  it simply would never cross my mind.

Getting back to my earlier line:  beyond on/off and level, what do we really want/need as audio listeners?  Someone decided a very long time ago that Bass and Treble control was pretty much a necessity, and there knobs (or sub-menus, as the case may be) have graced pretty much every audio amplifier since.

These controls were originally marketed as a solution for ‘poor room acoustics.’  Really?  It seems a little fishy to me.  If I go into a room that is bright-sounding, do I attempt to speak in a bassier-voice?   Used properly, there is no harm i suppose.  OK so Bass and Treble (note the convenient binary; also the reference to the musical staffs) seem alright.

So once we’ve given listeners control over the relative amounts of low-and-high frequencies, the next thing that manufacturers introduced were these reverberation units.  And they made them for everything.  Hell, they even made them for CARS.

(web source)

So weird.  Here’s a few 1970’s Japanese-made units.  This was clearly not a short-lived craze.

(web sources)

So we’ve given listeners the ability to control frequency response.  We’ve given them the ability to manipulate the apparent size of the space in which the recording took place.  What’s next?  In the 1970s, the DBX corporation sold hundreds of thousands of units just like this.

(web source)

A dynamic-range controller for home audio listening.  Now consumers could elect to give their recordings more dynamic range (IE more volume difference between loud peaks and quiet passages).  The stated intent of this was to make up for all the dynamic range that is ‘lost’ in the recording process.  Really?  I am pretty sure that whoever recorded that album was conscious of the dynamics that were present.  Why mess with it?  Anyhow, certain of these DBX units could also compress the source material.  IE., give the audio LESS dynamic range.

Equalization control and artificial reverb augmentation still exist in most home audio amps today.

They have renamed the reverb control as ‘sound space’ or something like that, but it’s the same idea.  ‘Take an audio signal and put it in a different space.’  The do-it-yourself dynamics processors seem to have been largely phased out though.  I don’t consider myself an audio purist, but there is something about all of these devices that really seems nonsensical to me.  Overall i get the feeling that  designers  ran out of knobs to put on the boxes, so they had to make new boxes and populate them with more knobs.

There’s one more angle that i’d like to consider:  So over the years, consumers have been given the 3 main types of audio processing that recording engineers have used in the studio for 60 or more years:  those 3 categories are *frequency balance, *ambience, and *dynamics.  In the past 20 years, though, recording engineers have been given tremendous new control capability due to Digital Audio Workstations, e.g., Protools.  What could this mean for consumer hardware?  Will audio waveform editing, time compression/expansion, and automation control soon be available in consumer audio hardware?  Is it already?

Does anyone actively engage with the ‘sound-space’ controls on their Hi-Fi receiver?  Are they useful?

Categories
Mixtapes Recordings

Mixtape: Fall 2010

I buy records.  I don’t seek out particular titles or pay more than a buck or two per LP; I go to estate sales and flea markets and dig and dig and dig for stuff that i have not heard yet (or not heard in years).  I pick up a few hundred per year.  It gets more difficult  (but also more rewarding) with each passing year to find music that i have not heard.  I generally look for rock and soul recorded between 1965 and 1975.

I like this way of experiencing new music because there is a bit of a folk-music quality to it.  As in: whether I like it or not, I am limited to listening to music that other people in my community were listening to some time ago.  It’s all music that shaped the hearts and minds of people who drove these same streets, lived in these same houses, played in the bars of my town many years ago.  Anyhow, of the 800 LPs that i buy each year, 60 will have a track that I like.

Those 60 end up on these seasonal compilations.  Tracks gets transferred from LP through a Proton  preamp and into Protools for trimmin.’   I use a Benz MC20E2 cartridge, which I highly recommend if yr in the market for a new cartridge.

Here’s the list for this season.  Link through for the details…

Cochise “Home Again”

Alive and Kicking “Tighter, Tighter”

Fairport Convention “Meet on the ledge”

Mark-Almond “Speak Easy It’s a Whisky Scene”

Dave Mason “We just disagree”

Mel and Tim “Starting all over again”

Jay and the Americans “Since I don’t have you”

Marvin Gaye “Troubleman”

Bobby Whitlock “Song for Paula”

Flaming Ember “Westbound #9”

Sandy Denny “It’ll Take A Long Time”

Macondo “Never thought I’d See You Go”

David Lannan “Morning”

Otis Clay “A House Ain’t a Home”

Steve Marcus “Tomorrow Never Knows”

Tufano-Giammarese “I’m a Loser”

Kevin John Agosti “Lighthouse Madness”

Jerry Jeff Walker “LA Freeway”

Al Green “Together again”

Gene Clark “1975”

Categories
Altec History

The Incredible Past Lives of Our Favorite Tools

A client recently asked me to service an antique piece of audio equipment: an Altec 438A.   This device belongs to the category of audio equipment called ‘compressors.’  Compressors are devices that even-out the variation in level (IE quiet vs loud) in an audio signal.  The applications of compressors are great and varied, and the use of compressors in music recording/mixing work is really an art.  Antique or ‘vintage’ compressors are some of the most fetishized devices in the pro-audio world.

Anyhow, my client wanted his Altec 438A modified so that it would be more useful for modern rock music recording techniques.  I won’t go into the details, but i performed the operation and he was very pleased with the results.  The Altec 438 (and its close cousin the 436) is just not practical for use in modern recording situations primarily because it was not really intended for use in a recording studio.  It was intended for use in industrial paging systems (e.g., “cleanup in aisle 9.  Cleanup in aisle 9…”) and civil defense warning systems, among other things.  That’s right.  The compressor that was used to get your ‘sikk’ drum sound might have been part of cold-war era military preparedness.  And the story of how these Altecs ended up in the racks of so many high-end modern recording studios (and, therefore, on so many modern records) is just as odd and specific.

Don’t get me wrong- Altec did make plenty  of equipment designed for recording studios in the 50s and 60s, and I am sure that 438s were used in some studios back then.

But there weren’t all that many studios around in those days.  Certainly not enough to create the 1000s of old Altec comps that fill studios nowadays.

Altec specified the 436 Compressor as part of several of their industrial and civil audio systems, the most evocative of which is Project Giant Voice.  Giant Voice dates to circa 1960.

Giant Voice is just that- a giant PA system designed to carry the voice of the Mayor or Nation Guardsman all over town. Literally All-Over-Town.

Nothing like a little mass instruction to keep the kids duck-n-coverin’.

Crockett Texas apparently held a meeting of the Town Elders in the fall of 1961 which led to their purchase of an Altec ‘Giant Voice’ system.

Considering that these Town Elders had just lived through the Bay Of Pigs invasion and the start of the Berlin wall, you can’t really fault them.

I wonder where Crockett’s two Altec compressors ended up?

One thing is for sure – Crockett’s compressors were not in England in the early 1960s.  But a few of their brethren were.  It turns out that EMI Records technical staff went to the United States in the late 50s and purchased a few Altec 436/438s.  The staff heavily modified these units (as I recently modified my client’s 438) in order to create something that they called the RS124.

(image scanned from “Recording The Beatles,” Kehew & Ryan).

EMI was the Beatles record label at the time, and guess what… it is the sound of these modified Altec compressors that helped to shape some of the most successful and influential rock music recordings of all time.

Authors Kevin Ryan and Brian Kehew published a book in 2006 called ‘Recording the Beatles.’  ‘Book’ is perhaps a bit of an understatement.  This thing is a Tome.  It is awesome.

I highly recommend it to anyone who is at all interested in record production or the Beatles.  Anyhow, this book, and the hype surrounding this book on the forums, helped to really inform everyone-who-cares that these old Altecs can have great application in the modern recording studio.  Prices on these used units have drastically shot up, from around $250 in 2005 to as much as $1500 at high-end dealers today.

So: what began life as a humble product created for use in industrial plants and civil defense was secretly hijacked by the British, transformed, and then re-sold back to us decades later as a cult item and now used as a fine craftsman’s tool.

Are there any industrial audio devices from the 1990s/2000s that have begun to migrate into the studio?

Has anyone ever purchased a defunct Giant Voice system at auction?

Categories
RCA Technical

TECH: RCA BE-100

The BE-100 is a plug-in equalizer module that was made for use with the RCA BC-100 mixing console.  I have never seen a BC-100 in the flesh, nor am i aware of any albums that were recorded with a BC-100.  Since it was a product aimed at the broadcast market, and fairly rare, it’s possible that no albums ever were made on one.  From what i can gather from the forums, the BC-100 was apparently a custom-built product, and the pre-amps in these consoles were apparently built by API for RCA (no word on RCA’s involvement with the BE100).  A few years ago i was at a local flea market and some guys had a box truck with the contents of a storage-unit forfeiture sale.  I bought about 25 lbs of electronic parts, mic parts, etc., for a few bucks.  I also got some very interesting AES journals (interesting insofar as who had owned them) which i’ll post soon.  Anyhow, one of the parts i got was this BE-100.  just the raw module.   I bought a copy of the BC-100 manual from a dude who had been selling other parts from these RCA consoles on eBay.  He was not in the business of selling manuals, but agreed to sell me one for $25.  a very fair price.  he even spiral-bound it!  Here’s the schematic for the BE-100:

I added an old NOS BUD case, +/- 15v powersupply, a NOS UTC line-to-transistor input transformer from the local electronics warehouse, and an output transformer i pulled from an RCA broadcast phono pre of the same period.

I was too lazy to look up the specs on the transistors used in the BE100 to confirm that i was using transformers with the correct impedances, but my ‘good guess’ must have been close enough:  it works just fine.

The unit sounds…  grungy.  Aggressive.  not subtle, and not hi-fi.  It is quiet (IE no hum, white noise, etc).  I have not measured the freq response, but it sounds like it’s pretty much full-range…  i think the transformers i used are pretty decent.  The most interesting feature is the 40hz low boost.  it sounds awesome.  this will definitely find some use in the studio.

Has anyone else used one of these?  any tips or suggestions?

Does anyone know any records/studios that used these?

Categories
History Icons RCA

ICONS: rca and evaporating knowledge

The story of RCA is a great American industrial story.  From its origins in WW1 to decades to breakups and re-configurations due to government regulation and shifts in consumer patterns, the Radio Corporation Of America was a consistent presence in the manufacture of media-playback devices as well as media itself.  It’s an incredible story.  Check out the Wikipedia entry if you want the details.

For someone growing up in my generation (born 1976), thought, RCA electronics did not have really good associations.  My impression of RCA was basically…  the company that made that crappy electronics stuff that was not as good as SONY (or even panasonic).  Well, by the time i was aware of the RCA brand, the company was only moments away from being broken up and sold off for good.   But just a few decades earlier, wow what a force RCA was.  the 33rpm record, vacuum tubes, mainframe computers, color television…  we owe an incredible debt to the engineers that worked at RCA in the 20th century.  Now that i have access to the pro-audio equipment that RCA was making decades before my birth, I am a big fan.  it’s great stuff.  an RCA BA-2 mic preamp is a great simple design that always gets good results in the studio.  And their ribbon mics?  Amazing.

RCA published an glossy magazine for its engineers.  it’s pretty technical, but i can understand the Audio-related articles.

It’s interesting to read essays that attempt to quantify the acoustic performance of those god-awful ‘french provincal’ Hi-Fi consoles.

I do not know how many people worked at RCA in the 50s/60s, but i imagine it was in the mid 6-figures.  Ironically, even i have been an ‘RCA’ employee – I worked for a few years at SONYMUSIC, of which ‘RCA’ is one of the record labels within this major label.  Of course, by the time i got there, the RCA name (as it pertains to sound-recordings) had been sold and re-sold and licensed so many times that the connection is faint at best.

I live in a town that was once a manufacturing powerhouse, with several major pro-audio companies present.  I will soon publish a post about Bridgeport’s audio manufacturing history.  I have sometimes thought about looking up former SCULLY employees, for instance, and trying to interview them about their work.

Once these people are gone, there will be no one left to ‘fill in the blanks’ about a great many details of audio technology history.

For instance: I was recently corresponding with a gentleman who is an expert on mid-20th century broadcast audio equipment. I was hoping he could clarify a vague detail in the schematic of a very old and very desirable microphone preamp.  Because: if i had a little more info, i could easily ‘clone’ this device and use it in my studio.  Since the vintage examples of this device sell for up to $7000, i have a pretty good incentive to build it myself.  Anyway, this very knowledgeable gentleman himself was stumped by this component as well, as are all folks on the forums.  So who does have the necessary knowledge?  if a HUGE community of thousands of audio and broadcast engineers all over the WWW can’t figure this out…  shit.  It’s the loss of this kind of information that i fear, and this is one of my motivations in creating this site.

Engineers who worked at RCA, and similar companies, back when our prized ‘vintage’ audio hardware was being manufactured, are the only people who can answer certain questions, provide certain skills.  ENAK is the trade name of Clarence Kane, a former RCA employee who now restores ribbon mics.  He is a very nice guy and he does great work, and very quickly.  He has restored an RCA BK5 and a SHURE 300 for me, and he really did a nice job. Dudes like this are a BLESSING.

I am not really sure what i am getting at here…  i am not saying that we should start cold-calling these dudes and finding out if they have piles of old schems and old parts in their homes…  but… after 15 years of going to estate sales all time, i can tell you that they probably do.  The ‘stuff’ of these retired engineers will all eventually turn up, but their knowledge and skills will not.

Categories
History Recordings

RECORDINGS: the appeal of demos

If you are a musician or serious rock music fan, you will know what the term ‘demo’ refers to in the context of recorded music.  ‘Demo’ is shorthand for ‘demonstration record(ing).’  IE., a recording which is not intended for public commercial exploitation, but rather to demonstrate the assets of the various artists involved to the industry.  Which various artists?  Generally speaking, demos are made by bands (musical performers with or without vocals), solo or group vocalists, and songwriters.  Demos are made in the hope of getting the attention of record labels, song publishers, other artists who are looking for new songs to record, club and concert bookers, etc.  Demos are generally ‘rougher’ and ‘less produced’ than commercial masters.  This is for a few reasons:  first off, demos are usually part of the process involved in GETTING a paying deal or getting a paying project green-lit, so there will be less money behind them.  Another reason is that since demos are made for an audience that is supposedly experienced and knowledgeable, demos can be a little ‘rougher’ since this special audience should be able to ‘hear past’ the rough quality and easily imagine what the band/singer/song will sound like once someone puts more time (and money) behind it.  This ability to correctly see ahead, past the performance flaws and technical imperfections of a ‘demo,’ is what will allow a record company scout, talent agent, or song publisher to key into top-quality talent early, thereby potentially getting themselves a better deal on this new property.

There is a lot of mystique and even superstition surrounding demos in the music/recording world.  People will speak of ‘demo love,’ AKA the condition wherein the commercial master can’t seem to eclipse the emotional impact that the demo manages to achieve.  On the other hand, some people will tend to apologize for their demos, even though their particular demo may be the best recording achievable on their budget, and even though it is the job of those in The Industry to ‘hear past’ the demo.  Anyhow, I am not interested so much in the operation of demos in their contemporary context, but rather, the special qualities that we can experience in the demos of the past.

Here’s a songwriting demo from Jim Ford, an obscure soul songwriter most active in the early 70s.  Several collections of his songwriting demos (demos created to ‘pitch’ his new compositions to artists who might potentially record them, thereby earning Ford and his publisher royalties on the recordings) were released in recent years by Bear Family, a German record company.  It’s sloppy and crazy and messy and my god.  It is cool.

16 Go Through Sunday

We generally agree that a demo is a ‘less produced’ recording.  OK.  but what does ‘produced’ mean?  Record production is an art that involves a great many details, many of them incredibly specific to particular genres and trends and microtrends that may last for brief years or even months.  Generally speaking, though, producing a commercial recording featuring some musical performers and a vocalist will involve, at minimum:

*)Some sort of dedicated recording space with the relevant tools and technology available (aka a ‘studio’).

*)The ability to capture multiple takes of a song, and edit between them if necessary.

*)A ‘producer’ who’s main minimum responsibility is essentially that of quality control – IE., someone with the authority and experience to say, “that’s the one.”

*)And, finally, time.  Enough time to set up the equipment properly. Dither around with all the knobs and positions and instruments until the desired effect is truly achieved.  And then do as many takes as needed, and afterwards, edit and mix and re-process all the various recorded audio signals until everyone who is invested in the project can say ‘what up, DONE?’

Let’s consider a typical example of a production task.  Music production of  instruments and especially vocals generally involves various electronic processes intended to enhance the sound of the performance.  For instance:  no one likes to hear a vocal that is not as well on pitch as the singer had intended.  But if the singer just can’t nail it, what do you do?  As an audio operator, you will employ various processes to either draw attention away from the flawed performance or even to correct the flaws.  Until 1965 or so, this was done by adding reverberation and/or echo in order to ‘smooth out’ rough transitions between notes.  (Try singing in the shower, or some other reverberant space, and you will notice that your signing sounds better!)   Moving on, in the late 60s/1970s, aiding a pitchy-y vocal was often done by recording multiple takes of the same part and layering them on top of each other (a.k.a. ‘double tracking’ -made feasible because now you could have 16 or 24 separate tracks on a multitrack tape rather than just 4 or 8 tracks).  by the early 80s and the advent of readily-available digital audio technology, you suddenly had the ability to ‘sample’ off pitch notes, correct the pitch, and then re-insert the corrected note into the performance.  By the early 1990s and the dawn of the Digital Audio Workstation era, you had the ability to manipulate the performance basically however you wanted to.  ANYTHING was ‘fixable’ given you had enough time and skill.  And finally, by the late 1990s, we were given the technology commonly referred to as Auto Tune, by which a performance could be pitch-corrected nearly automatically, with very little skill or experience required even on the part of the audio operator.

So that’s the broad strokes, and one macro example, of music production.  Back to my earlier line of inquiry:  If a demo is a less-produced recording, then, a demo is basically a recording that is less manipulated.  It has been subjected to less human-time spent modifying the audio.  It is more simply the product of the performances and the physicality of the microphones, recording environment, and  instruments that created the performances.  Also, randomness and chance likely will play a bigger part in the finished result.  None of what i am saying are absolutes – these are just generalizations.  But in general, when we hear a demo from, say, 1970, we are given the chance to peer back in time in a way that produced commercial recordings don’t always allow us to.  We can hear the way that an actual human drummer played a take In The Year 1970, as opposed to 7 recorded takes that were edited together and oh btw we tape-edited the drums in the bridge to really make it groove there.  Is this better or worse?  Neither.  it’s different.  It’s a matter of what you like.  But, the demo will likely offer closer access to the performances and the actual sounds of the instruments/microphones/studio spaces that were used in ‘those days,’ whatever those days may be.   I think in general, most people would associate ‘demo’ with ‘Lo Fidelity’ and ‘Studio Master’ with ‘Hi Fidelity,’  but when you think about it, a demo (so long as the recording equipment used was of decent quality) will actually bear much more fidelity to the actual acoustic event than a commercial master.  We could get on a major sidetrack here about the quality of the equipment did matter back in the day/still matters today, but you catch my drift.

Have you ever seen ‘Shadows’ or any of the Cassevettes films?  I was really struck by ‘Shadows’ when i first saw it at maybe age 18.  My god, i had never heard people talk like that!  Or move like that!  Cassevettes as a director really relied on his actors to improvise, and therefore, I think his films offer us a better view into how people actually behaved back then.  Sort of like what documentary films can offer.   Granted, his ‘people’ were generally trained actors, but still.  It’s less the work of a committee and more the work of One Person In Front Of A Camera.  And for this reason, i feel like it gives me better access to that actual historical moment in which the film was made.  I feel the same way about old demos.  Here’s a really obscure recording from around 1970 that i found on a cut-rate compilation LP called ‘the now sounds.’  The LP contains recordings of various pop hits of the day, credited to basically anonymous vocalists.  There is no information to be had on ‘jerry walsh’ or this recording.  I imagine that it may have been recorded as a demo for this singer.  Probably not for the band backing him, as there is a bad tape edit (or lack of an edit!) going into the guitar solo where the beat gets lost.  If this had been created to the satisfaction of the band, the drummer would have likely not found this to be satisfactory.  On the other hand, if the drummer was just hired to back up ‘Jerry’ that day, well…

04 Let It Be

Anyhow, yeah this is all conjecture on my part.  Nonetheless, when i hear this recording, i feel like i am really getting a good sense of what it would have been like to hear an average singer, fronting an average band, in some average bar, anywhere in America in 1970.  I’m not hearing The Entertainment Industry (which i have heard a million times, and it usually pretty much sounds the same).  I ‘m just hearing some guys making a demo.  And it’s evocative.

Does anyone  out there collect and compile ancient publishing company demo recordings?

Is Jerry Walsh out there somewhere?  Was this made as a demo?

Categories
Custom Fabrication Guitar Equipment History Icons Technical

Recycled Champs

one of the most famous electric instrument amplifiers of all time is the tweed-covered Champ amplifier made by Fender in the 1950’s thru early 1960s.  Here’s a image of one from 1959 that i pulled off the web:

Fender made true vacuum-tube champs until the late 1970s, but the tweed-covered Champ (and it’s close cousin the tweed-covered Princeton) differ from their later namesakes in a lot of ways.  In the case of the final Tweed Champs, the lack of bass and treble controls  means that there is roughly 20db more gain available vs the later Black Tolex-covered Champ.  This does not necessarily make for a louder amp.  This does, however, make for an amp that can get super distorted and generally Sound Like Awesome.

Tweed Champs cost a fortune to buy.  Eric Clapton apparently used one for the Derek And The Dominos record.  This fact became widely known, and they have been very expensive ever since.  Fender now even makes a ‘re-issue’ (never a good idea) that sells for close to $1000.

champSchem

The schematic is posted above for anyone interested in checking it out. They are very very simple.   Anyhow, since these things do sound so great and they are so simple to build, it’s a lot of fun to build them into Any Old Thing that catches your eye.  Here’s a quick survey of some Champs and Princetons that i’ve built into found enclosures.  You’ll see recycled Intercom units, school PA system speakers, and 16mm film projector speakers.  The circuits in these are all new, built with new or lightly used parts; but the cabinets (that part you actually SEE and touch) are straight up ancient.  I generally take plenty of liberties with the circuit, changing parts, adding features (reverb, add’l gain control, EQ, etc), even building them using different (but similar) tubes, and i’ve yet to be disappointed.

Categories
Uncategorized

Issac Hayes Buys Some Used Components

One of my all-time favorite TV shows is The Rockford Files.  James Garner plays a laid-back ex-con private eye.  He’s an old-fashioned guy kinda coasting around half-confused amid all the far-out hippies and irresponsible bon vivants of mid-seventies Los Angeles.

He’s kinda like If Johnny Cash Was A Detective.  He drives a gold Firebird (NOT a Trans-Am – too tarty-) and he’s generally pretty alright.

Since our show is set in mid-seventies LA, there is plenty of music-biz shenanigans throughout the series.  In one of my favorite scenes, Rockford impersonates (oh-btw- his general workflow consists of 70% impersonating fictional people and 30% fast driving) an A+R guy who proposes remixing an ex-con’s old record with new string overdubs ETC…  another one has him head-to-head with a squirrelly label head with a payola/coke/murder problem.  it’s all pretty great.  ANYHOW.  in the scene below, Gandolf Finch (played by issac hayes) describes doing something that no one really does anymore…  he BUYS USED STEREO COMPONENTS thru the classifieds.  IN THE PAPER.

Wow.  people used to actually needed to buy an amp, a tape deck, a tuner, a record player, speakers…  crazy.  Nowadays it’s an ipod dock with a lil amp built in.  Would a 12 yr old kid even understand WTF Gandy is talking about here?   Components?  Furthermore, the whole plot of this episode hinges on the fact that the used speakers turn out to contain a shit ton of stolen money/drugs ETC.  What could u fit in one of those ipod docks?  a few roaches and a coupla nickels?  Certainly not enough to get Rockford out of his trailer.  (oh yeah- Rockford lives in a mobile home on the beach).  Check out the clip below, and check out The Rockford Files streaming on Netflix. Season 2 is the best season, IMO.

GandyGetsAUsedStereo-desktop

Categories
Custom Fabrication History Icons Technical

Hey it’s one of those old horn speakers

Along the lines of the ‘Carbon Mic’ (see earlier post) are these early horn speakers.   They are visual icons that have become separated from their actual sonic function due to the fact that they do not interface with any other audio equipment that any normal living person would own.  But don’t those things look great?  yes they do.  They look very similar to the acoustic horns that are mechanically coupled to the needles of ancient record players, but in fact these are electrical.

here’s an example of a very old record player which has a horn mechanically coupled to the needle:

On the other hand, the early electro-mechanical horns were made for use with early Tube radios. They have drivers with permanent magnets attached to the base of the horn.  Driver:

These type of speakers date from the 1920s, and they are the earliest common electro-mechanical transducers.  I picked up this example, made by Music Master of Philadelphia, at a yard sale.

Here’s the base of the unit, which contains the driver.

i plugged the very frayed cloth-covered wire into an old receiver and…  sound!  it worked.  the volume level was very very low, tho, even with the 50 watt receiver turned up all the way.

Turns out that these early speakers require a slightly different sort of amplifier than we use nowadays.  Not surprising.  So i built something to do the trick.  I describe the process below for those who want all the bloody details.  Once i had this thing running properly, tho…  the big question… how does it sound?  well, when listening to music recorded in the 1920s (like my Blind Willie Johnson), it sounds fine.

Later music sounds pretty bad.  and not even in an interesting way.  just bad.  But old classical and gospel are cool.   Hearing those old recordings played back on the same sort of system that folks would have used 90 years ago…  wow.  it’s fun.  I have the horn (and it’s attendant special amplifier) hooked up to an Apple Airport Express which hides in the base of a corner cabinet in our house.

Other rooms in the house have their own full-range systems with their own Airports, so it’s really easy to switch up the playback systems depending on mood etc.  Love iTunes on the laptop.

Here’s the tech-y stuff for those of you who care.  So why did the speaker not play back at a decent level when used with my old SONY receiver? A quick bit of online research revealed that these old horn speakers have an effective impedance of 1000-2000 ohms.  WAY off from the 8 ohm speaker output of a contemporary receiver.   Anyhow, to confirm this, i inserted my handy University Sound universal impedance matching transformer (wired to couple 8 ohms to 600 ohms) and what do you know.  the speaker worked fine.   Decent volume level with the volume knob set at 10’o-clock.

Anyway, rather than run this thing all the time with a giant shitty receiver, i decided to simply build a tiny 5watt tube amplifier with the highest impedance that i could easily generate – 600 ohms.   I had some Edcor 5K/600 single-ended transformers lying around from a mic preamp project that i aborted because…  well…  the Edcors don’t have enough low end response to make a good mic preamp.  In this decidedly lo-fi application, though, they work just fine.  I used a 6J7 (for the old-timey look) into a 6V6 tube with a 5V rectifier.  I initially built the unit with a 6L6, but the edcor was getting REALLY hot (i guess they mean it about the 5watt rating) so i switched the tube to a 6V6 (and changed the cathode resistor appropriately).  It runs cool now.

Anyhow, this little amp also has the added feature of two RCA input jacks that passively mix to the input grid of the 6J7.  which is a necessary feature since i use this to listen to (stereo) music from iTunes via the Airport Express.  Also: super-nerdy but maybe worth mentioning – dig the old ‘screw-lug’ speaker connection.  i have been using these a lot lately and i think they add a little charm, even tho they do generally require some dremel-ing to the chassis in order to mount. (i hate the dremel and will do almost anything to avoid it.  Greenlee punches 4eva)

If you find one of these speakers for a good price (mine was $25, down from the sellers asking price of $80), and you can confirm that it works, you might want to pick it up.  One caveat: i apparently got lucky with the speaker that i bought.  Apparently, it’s common in these older units for the magnets to actually have lost their charge, and if that’s the case, they will need to be re-magnetized using wire and very high voltages.  Dangerous and irritating.  There are a few pages on the web that describe this procedure.  It’s pretty incredible to me that this technology is so old that the magnets have lost their charge.  crazy.  will this happen to all of our permenant magnet speakers some day?  will all of those coveted old Alnico drivers be useless at some point?  when?  2050?  Can’t wait for “The Day The Tone Died”  haha i can’t believe i said that….   awful.    Hate ‘Tone’ as a synonym for ‘pleasing sound quality in an electric-guitar sound reinforcement scenario.’

Does anyone out there use one of these speaker systems for music listening?

Anyone have a dedicated ‘antique’ system for listening to certain genres/ periods of recordings?