Categories
Guitar Equipment

Bass c. ’70

Just a few random things today that caught my eye.  The Hagstrom 8-string bass pictured above with players Noel Redding, among others, was recently re-issued.  seems like not a bad choice for live rock bands.   Tom Petersson of the not-terrible band Cheap Trick has used a similar contraption for years.   Yes I am joking btw Cheap Trick is rad.  ANYways…

Good lord.  Just in case the SVT is not big/heavy/loud enough for you, Fender swings back with 435 watt PS-400.  I have only seen one of these in my life; can’t recall when/where.  Great fan-site for these amps here…  interesting picks of melted (like, literally) 6550 tubes from some sort of biasing-mishap.  Proceed with caution…

The Fender Precision bass in classic James Jamerson trim.  Who is James Jamerson?  Books have been written…  but you can start here. Kinda invented maybe 25% of the electric bass guitar lexicon?  Rough guess.

The electric bass Jamerson played was a stock 1962 Fender Precision Bass which was dubbed “The Funk Machine.” Jamerson bought it after his first Precision (a gift from fellow bassist Horace “Chili” Ruth) was stolen. It had a three-tone sunburst finish, a tortoise-shell style pickguard, and chrome pickup and bridge covers (the latter containing a piece of foam used to dampen sustain). He typically set its volume and tone knobs on full. This instrument was also stolen, just days before Jamerson’s death in 1983. To date, it has not been found.

(source)

 

Categories
Synthesizers

makin’ it

What is goin on here !?

The May 1979 issue of DOWNBEAT magazine has a short article on the subject of Do-It-Yourself synthesizer kits.  I’ve uploaded a scan of the entire article as a PDF below.  Much of the article focuses on kits from Paia.  Paia, if you are not familiar, is a very long-running company that makes audio kits.  One of my earlier experiences building audio electronics was constructing their Theremax Theremin. I got the Theremax together in about a day, and it worked right away. No issues.  I used it (mostly as a performance voltage-controller) for about a decade before I sold it at a moving sale.  It was a good, reliable piece.    I know that nowadays there are a lot of cheap theremins on the market, but 15 years ago it was a pretty unusual item.

DOWNLOAD ARTICLE: SynthKits_Dwnbt0579

Anyways…  PAIA still makes and sells descendants of the synth modules that are described here, and the prices are extremely reasonable.  A time-honored way of getting into audio electronics.

btw, dude in the pics here is not me, but it might as fukking well be.

Categories
Gold Coast Recorders Technical

Ward Beck Console Preamps: History, Preservation, Listening Test

Tom Gruning with one of his Ward Beck ‘lunchboxes’

I came across Tom Gruning’s work on eBay and I was drawn to the level of craftsmanship that he put into these largely unheralded Ward Beck pieces.  What’s/Who’s a Ward Beck you say? Well,  today on Preservation Sound we will learn a little about Ward Beck, the Canadian broadcast-audio-equipment manufacturer; take a look at some of Gruning’s work reinvigorating and preserving these pieces for use in the modern music studio; and we will conduct a listening/recording test of his pieces in comparison with some studio-standards.

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TG work in the Shop

PS: Tell us about Ward Beck, the audio-equipment manufacturer.

TG:  As far as WBS history…their consoles were/are broadcast consoles that were/are very, very high quality. I seem to recall reading that Neve was their primary competition in that market during the 1970s and ’80s. Neve moved over into recording consoles and WBS stayed with the broadcast market. There is a really wonderful on-going WBS history thread in the forum at the Ward Beck Preservation Society website. I suggest all your readers go there and tune in as it is an absolutely fascinating first person account of that history.

PS: How did you get involved with converting old Ward Beck console modules into stand-along ‘plug-and-play’ rack units?

TG: I got interested in WBS equipment about five years ago. I was putting together my personal ProTools project studio and simply couldn’t afford excellent quality store bought mic pre-amps. Being a research guy, I spent inordinate amounts of time reading what people had to say about any and all console strips. These were, after all, considerably cheaper to come by than the plug and play Neves, APIs, Chandlers, and on and on. The Ward Beck stuff sounded like the best of the bunch in that first and foremost, people thought they sounded excellent and were built like tanks. There was also a really knowledgeable and helpful community of folks willing to help newbies like me: that is, the gang at the Ward Beck Preservation Society.

As I wound up learning more about making these things work, I started investigating different modules when I could afford them. At this point I have 460s, 461s, 462 and 472 EQs, a 466 compressor, 470s, and 490s in my personal stash. Eventually I’ll add some 441s and a few others I have my eye on.

PS: Tell me about the mic preamps that you sent me.

TG: The 49o pres I sent you started life as line level modules in a small, fourteen channel broadcast mixer. ….I pulled the first module and found the Hammond 6012 input transformer so I set about the task of turning these into mic-level units. It really didn’t take too much modification to turn them into mic level units and I wound up bypassing the logic circuitry in many of the racked pairs. Besides simplifying the signal path and eliminating the possibility of ICs crapping out, the mod (which I credit to legendary WBS guru Dave Thomas) gives the pre a pleasingly accentuated mid-range presence that really jumps out in a mix. They are great sounding pre-amps and prices on them are still very reasonable.

PS: Tell us about some of the different vintage Ward Beck pieces out there in the world.  What should folks look for?  What to avoid?

TG: I like the sound of all the WBS modules with input transformers. Bypassing the logic on the 490, the signal path is essentially the same as that of the 470. These sound really good on snare/high hat, electric guitars, and various other sources. The 460 series has a bunch of different designations: 460A; 460B; 460M; 460L,;460LA; etc. My favorites are the ‘L’ and ‘LA’ models simply because they are, as I recall, the most recent of the 460s and they have the really nice sealed pots, fully parametric EQ, and so forth. However, there really isn’t a hell of a lot of difference between the sound of an ‘A’ or ‘B’ and any of the others. The 460s have a big black custom made Hammond input transformer that really gives them a yummy, big, fat, round presence that is at the same time clear and nicely balanced. And they really are built like tanks. I’ve only run across two WBS modules that I couldn’t get up and running: a 466 compressor that I sent to Tristan Miller, a very talented Canadian tech who whipped it into shape, and a 461 mic-pre that I’m still banging on and eventually will get working. Most of the time, cleaning and radically exercising the switches, which are the only really weak link in the WBS chain, will get them passing signal.

PS: What Ward Beck ‘rack-conversions’ do you have available in-stock at present?

TG: I still have a few of the 490H rack boxes in stock (like the one I sent you). I also have a slanted front maple eight pack wired for six slightly modified 460 modules and two 470s. That one has a separate 1U rack mountable power supply. At present the box contains the two 470s, one 460L, and one 460LA. Oh yeah, I also have several 2U pairs of Yamaha PM1000 modules in my GruningAudioworks boxes. I have pictures of all these things on my website tomgruning.com. I also build custom-made hardwood cabinetry for WBS modules and various other things including exotic wood cabinets that house powered “picnic baskets” for API 500 series compatible modules.

Also, just as an aside: If any of your readers decide to rack up some WBS (or Auditronics, or PM1000) modules and would like some help, please feel free to contact me. In learning how to do these, I ran across a number of people who have been very helpful and generous with advice and instruction. If I can do the the same that would be good.

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The Ward-Beck 490A input module in its ‘just-harvested’ state

(image source)

Alright.  Now on to the listening test.  TG sent me a pair of 490A modules which he had racked up, adding phantom power and system power in a very nicely fabricated black steel chassis.

I mounted them in a pre-amp rack at our new studio, Gold Coast Recorders (more on GCR to come…).    I have heard folks compare these Ward Beck preamps to API 512s.  I decided that this would make as good a comparison as any.  Especially since many of you are probably familiar with the sound of the API 512.

Our friend Tim W., recordist and drummer of the excellent band The Stepkids, came by GCR to help in this listening test.   Here’s what we did.  And it ain’t scientific.

Tim got behind a 20/14/12 circa ’64 ludwig kit that I had mic’d up with 4 mics:

-two Sennheiser 441s on the kick, and two Neumann 103s in front of the kit.

The mic pairs were spaced as close as possible.  One kick mic/Front mic pair went into the Tom Gruning-racked Ward Beck 490s; the other kick mic/front mic pair went into a pair of AP1 512s.  The outputs of the mic preamps went directly into pro tools.  no other processing was used, and the signals were played back and bounced with the faders at zero.

I asked Tim to play a beat inspired by this chestnut.  And here’s what we got.

Here is Tim’s performance as recorded thru the Ward Beck M490A pair:

LISTEN: WardBeck_M490A

…And as a reference, here is the exact same performance, recorded at the same peak level, but recorded thru the pair of API 512 preamps:

LISTEN: API_512

Here is a screen shot of the Pro Tools session.

You can see clearly that the Ward Beck kick channel (Kk) is limited in comparison to the API kick channel.  It’s also more symmetrical.  The room mics (OH), on the other hand, have similar dynamic range except on the strong peaks.  Perhaps this greater dynamic range  was due to the fact I used the pads (on both the API and the Wbecks) for the room mics but not the kick mics.  In case you are wondering about phase: yes I did try reversing the phase relationships on both sets of mics, and i can confidently say that what you here in these mono bounces is the correct phase relationship.

Tim and I listened back in the control room at GCR.  The room is outfitted with a Blue Sky monitoring system with their 12″ sub; the low-end extension and clarity is very good.  And this was very helpful for this particular evaluation.

TIM W: ‘The signal from the Ward Becks really moves the room.  It’s much deeper in the bass but not as punchy (as the APIs).  I can really hear the articulation of the Toms in particular (with the WBecks).  There’s less presence of the hi-hats and the cymbals in general.  The bass is really deep – there’s more length to the kick drum sound.

PS: The APIs are a lot more focused, but there seems to be an entire octave of additional bass extension to the kick drum with the Ward Becks.  I feel like it is unusual to hear mic preamps that have this much ‘attitude’ but actually have deeper bass than a high-end preamp like an API.  The low mids feel scooped on the Ward Beck; the high extension is not as good.  I imagine the Ward Beck would be great on rock bass guitar or maybe room mics for a kit.

TW: The API is giving me more low mids in the snare and toms, but i am not hearing that real low end in the bass drum.  (the API pair) is more ‘punchy’ rather than really bassy’

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I encourage you to listen to the audio examples above and draw your own conclusions.  I feel like the Ward Becks are good addition to the rack; I am definitely excited to try them on an SVT cabinet, and some loud rock vocals too.  It’s definitely a very coloured sound – both in terms of the compression and the scooped low-mids and slightly rolled-of highs.  I will also give em a go on kick drum for sure.   Check em’ out on Gruning’s site; you might be pleasantly surprised how affordable they are.

 

Categories
Microphones

Oddball dynamic mics of olden days

A quick review of some odd mics from the ‘pile’ that have not made it over to the studio yet.  If anyone out there is using these for makin’ records, drop a line a let us know yr thoughts.  Above is the Altec 660A, which is an Altec-branded iteration of an earlier western-electric mic. This thing sounds very thin.  it’s quite small – check the XLR connector for size reference.

Another ancient Altec mic.  this is a 684B.  This piece does not sound bad, but… it failed the SM57 test.  What, you ask, is the SM57 test?  Well…  whenever a new mic appears, i quickly A/B it with an SM57.  If the SM57 sounds both ‘better’ (IE more ‘hi-fi’) AND ‘more interesting’ (this is harder to quantify….), then the new mic goes in a box somewhere.  684B up there failed the SM57 test.

This is an American D4T.  This is a hi-Z dynamic public-address mic from the 40s.  This is, btw, the first antique mic i ever bought.  picked this up at an antique shop in Prov RI back in the mid 90s, along with a little tube suitcase PA system and nice old cast-base mic stand…  $75 i think….  This mic still works, and it sounds cool, but it’s just too distorted…  feel like it sounds too ‘Pop,’ of all things, at this moment; ‘distressed-vocals’ being the trendy thing that they are.

An Electro-voice military communications mic.  Got this one still in its heremetically-sealed, foil-lined pouch.  It ain’t bad, but…  i have too many mics like this, only just slightly better….

A Sennheiser MD 416.  I was really excited about this thing, and i paid like $100 for it, which is a fortune for a cheapskate like me.  Now, I have a lot of old sennhesiers…  an original 409, 421, and several 441s… and i really dig them… but this thing just has no… balls?  No low-end, at least.  And that Mini-Tuchel-to-XLR cable wasn’t cheap either.  This gets my vote for the most-expensive-mic-that-looks-like-a-really-cheap-mic.  I will call it Paris H. from now on.

Shure 585 ‘unisphere A.’  Basically a cheap hi-z dynamic with a volume pot built in.  I think this is known as the ‘James Cotton’ mic.  Cotton was a harmonica player in the 60s whi apparently used just about every amp and mic in existence at one point or another, cos there is really no limit to the range of items people are eager to associate with him.

Shure 777s Crystal mic with switch.  I think this came with a large pile of old mics.  It’s a 60 year-old crystal mic.   not much more to say.

Shure Commando.  Honestly not even sure what kind of mic this is.  Sounds pretty cool but it’s hi-z so it’s a pain in the ass to use in the studio.  harp (harmonica) dudes seem to dig these.

Shure PE-54.  The ‘PE’ stands for ‘Professional Entertainer,’ believe-it-or-not (seriously, though, this is true.).  This is the hi-z version of the Unidyne III… which is the forerunner of the SM57. This is actually a really good sounding mic, but since it’s hi-z, it’s a pain to use. I have an SM56, which is the balanced version of this thing, so this is kinda redundant.  but for real this mic sounds great.  i was surprised.

Turner 510.  The best dynamic mic Turner ever made.  I am actually not sure how this thing failed the SM57 test.  Think maybe it deserves another chance.  Look for a shoot-out including this mic.  here.  soon.

 

 

 

Categories
Guitar Equipment Technical

Magnasync Moviola URS as a guitar amp – UPDATE

Magnasync/Moviola was a Los-Angeles based manufacturer of film editing equipment.  They did make a few audio products designed to support the large upright and flatbed Moviola film-editing machines which were their main products.   The most common of these audio-products is the URS 5-watt tube amplifier with built in 4″ AlNiCo speaker.  The URS apparently debuted sometime around 1955.

I recently purchased a pair of these things for a few bucks.  Aside from needing new pilot bulbs and some contact cleaner in the volume pot, they seemed to be working alright.

The rear of the unit (not shown) has a 1/4″ speaker jack (labeled ‘Headphones” which mutes the built in speaker when a cable is inserted.  Other than that, though, there was no obvious input jack.  There is a 4-pin amphenol jack with DC present on 3 of the pins.  the 4th pin is the audio input. Ahh Ok.    There is a also a single-pin DC power connector/takeoff?  Not sure.

Anyhow, kinda irrelevant.  Since no one is going to be using these things with an actual Moviola sound-head, figured I would just make em into lil guitar amps. OK it’s gonna get a little technical here, so pls skip the next paragraph if you wanna just get to the sounds…

Since the tube compliment is 7025 (aka 12AX7) – into 6AQ5 power tube (aka basically lower-voltage rated, small-bottle 6V6) with a single volume pot between the two 7025 stages, this thing is basically…. a tweed fender champ.  Yes, there are some important differences – different plate resistor values, no cathode bypass caps on the preamp stages, and i think some frequency compensation in a the feedback loop?  But basically a tweed champ.  ANYhow…  Following the advice offered here, i put a 1/4″ guitar jack where the single-pin power socket had been.    Then i simply added the other basic components of a Fender guitar-input-stage:  a 1m resistor to ground, and a 68k resistor between the input and the grid of the input tube stage.  Replaced the 2-wire AC cable with a 3-wire grounded cable, and done.

There is plenty of talk on the web about these things…  lotsa folks have converted these to guitar amps in the same manner that i discussed… and people seem to be very happy with them.    Check out this fellow’s work. He did an especially thorough job.  I was personally kinda shocked with the sound that it makes.  Never in my life have i heard so much distortion and fuzz out of an amp.  It really is, pardon my language, fucking insane. Here’s 3 sound clips.  (Gibson Firebird gtr.   SM57 3″ in front of the speaker, into MBox.  ‘Clean’ and ‘Overdrive’ examples have analog echo pedal between the guitar and the amp.  Fuzz is just the amp.  No other eq or processing applied).  Check it…

Clean: Magnasync_URS_clean

Overdrive, fingerpicked: Magnasync_URS_overdriven

Fuzzed out (max volume): Magnasync_URS_fuzz

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UPDATE:  One of the two URS conversions that I built was purchased by producer P.K.  for use on an album project with a new band out of London.  When the record comes out (assuming the URS tracks make the final mix), I’ll post links to the cuts here so that y’all can hear the sound of these fantastic little amps in-context.

Oh and about that other URS conversion that I built: as of today, it is still on-sale at Main Drag Music in Brooklyn NY for a mere $250.  Call or email them if yr interested.

 

 

Categories
Custom Fabrication Technical

Recent Custom-Build Stereo Amplifier (Home Use)

Above: a very minimal single-ended stereo amplifier with very low gain, designed to accept headphone-level input from an iPod or Laptop and drive a pair of loudspeakers.

The circuit design is extremely simple – Each 1/2 of a 6SN7 feeds the grid of a 6L6 through a .1uf capacitor.  There is a 3-stage power supply with a choke filter before the B+ hits the output transformer.   I have built a couple dozen of these, and the design works well – the sound is very clean and direct; the small 8w output transformers do roll off the very low end, but I have never found this to be an issue with the music that I listen to.   Easy to add a powered sub to the system if one was into rap or heavy orchestral music. BTW, I use this very same circuit, with the same components, for music listening at home; I have mine connected to the output of an Airport Express, powering a pair of Bose 201 speakers. For instances when customers have wanted to hook the unit up to a line-level (rather than headphone-level) output, I substitute a 6SL7 for the 6SN7.  This requires simply changing the cathode resistors on the input tube socket and gives 3x the voltage gain.

What interests me in this design is not the mundane circuit – it is the overall appearance/sculptural aspect of the unit.  I arrived at this particular form through consideration of the appearance of the vacuum tube; as much as possible, I have tried to make the overall complete unit an amplified echo of the tube itself.  The circuit is laid out extremely carefully and the components/wires color-coded (red for B+, orange for audio), green for grounds); it’s my perhaps naive hope that someone unfamiliar with audio circuits could look at/into this piece and maybe gain some understanding of the way that a tube audio amplifier works.

Categories
Uncategorized

Lafayette Microphones of the 1960s

Do any of the Top-Quality mics in the above scan look familiar?

I seem to see… an RCA BK-1A?

….a shure 777 crystal mic?

an Electrovoice 664?

…and what is this thing exactly?

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I picked up this Lafayette PA-46 for a few dollars at the Flea Market yesterday.  It appeared to be unused; the odd 3-pin socket was unsoldered.  I hooked it up and it works well.  I wired it ‘hi-z’ and the sound is good for a 50 year old dynamic mic. The design seems to be an ‘homage’ to the contemporary Electrovoice 636.  Here they are side-by-side:

…although it also seems to have connection to the earlier Altec 21b ‘coke bottle’ condensor mic:

(image source)

…and maybe the Dukane 95D as well.

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Lafayette Electronics was an importer and retailer of consumer-electronics active from the mid 1920s through the early 1980s.  They were a competitor of Radio Shack and Allied electronics; when those two retail giants merged, Lafayette was squeezed out of the market.  So what happened to all of the Lafayette shops?  Turns out that may of them became Circuit Cities.  Crazy.  Anyhow, a lot of Lafayette’s merchandise in the 1960s was re-branded Japanese goods that bore a certain resemblance to US-made goods of the period.  These microphones are a good example.  When the Japanese designers got the ‘copy’ exactly right, it’s not that interesting…  but the odd pastiches, such as the PA-46, have a certain weird-dream charm to them.   Check out the complete history of Lafayette at this link.

Categories
Magnecord

Complete Magnecord System on eBay

For all the PS dot com readers who have inquired about the Magnecord tube reel-to-reel machines that I have discussed here: a complete system, including the very rare PT6-IM3 mixer unit, is available on eBay right now with a current price of $124.  I have no knowledge of this specific unit or this seller.    Check it out….

Categories
Pro Audio Archive Synthesizers

Vintage Moogs in Deutscher Sprache

From the PS dot com archive/pile:  Download nine pages of German-language Mini Moog and Moog Sonic-Six catalogs from 1974.

DOWNLOAD: Moog_Germany_1974

Also includes Moog German price-list of the era.

The Mini-Moog synthesizer was introduced in 1970.  It was a truly revolutionary device.

Keyboardist Rick Wakeman says of the Minimoog’s invention: “For the first time you could go on [stage] and give the guitarist a run for his money…a guitarist would say, ‘Oh shit, he’s got a Minimoog’, so they’re looking for eleven on their volume control – it’s the only way they can compete.” Wakeman said the instrument “absolutely changed the face of music.”

(Source)

Essentially, the Mini Moog was the first widely-available ‘performance’ rather than ‘studio’ synthesizer instrument.  The distinctive sound of the Mini Moog is due its 3 available oscillators (most vintage analog monophonic synths have no more than 2) and its 24db per octave filter (in contrast to the less-aggressive 18db per octave filter of its contemporaries).

The Moog Sonic-Six was similar to the Mini Moog, but it has only two oscillators.  Its ‘institutional’ design and built-in amplified speaker highlights its intent as an educational instrument.

 

Categories
Publications

Book Report: The Ultimate HiFi & Listening Rooms

Wow would you take a look at that pile.

Been thinking about Japan a lot lately; it’s impossible not to, what with the coverage of the horrific events suffered there by so many.   As I type this, NPR is reporting that the official death toll has just passed 10,000.   I attended a public magnet school for 10th grade in which I was taught Japanese and then sent to Japan to live with a suburban family for a month.  This experience had a profound effect on me and I am consequently one of many Americans who has a great fascination with, and affection for, Japan.  It is notable that middle-aged Japanese men seem by all accounts to be the world’s leading demographic of vintage-audio fans and collectors; antique audio has become my obsession as well.  Not sure how the chicken/egg thing sorts out on this one but there you go.

“The Ultimate HiFi & Listening Rooms” was published sometime in the past decade.  From what I can divine from the wholly Japanese text, it seems to be a collection of “Show us your system!” reader-submissions as published from 1989- 2002 in MJ Audio Technology, the venerable Japanese magazine.  See this earlier post for full details on MJ.

If there is one thing that collectors of obscure items all enjoy, it’s seeing the similar collections of others, and this book does not disappoint.  I picked this up in Tokyo several years back, and I have no idea if it is still in publication; if it is, Kinokuniya can certainly import it for you (The ISBN 10 is: 4-416-10201-1).

Here are some examples of the wonders on display in this 192pp volume.

I really dig how the inclusion of the antique-industrial-electronics within an otherwise conservative, posh-masculine domestic space creates a real Matthew Barney vibe.  Or, in a different sense, it feels like the discourse established by the obelisks in the various images within the Led Zep ‘Presence’ sleeve.

Aside from the strange and sizeable systems, many of the spaces themselves are quite  beautiful and idiosyncratic.

Portraiture of the obsessed.  Highly recommended.

See this link for previous Japanese Super-Collector coverage on PS.com