With the advent of classic gain reduction units in softwareplugin form, i thought i would start a series of threads explaining how these original. Studio c is westlake studioss premier tracking and mixing room. So be sure to experiment with other source material. Or is it the unique compression curve imparted by the optical compression circuit. This tubedriven optical limiter has been on more hit records than we can count, and for good reason. Ive finally worked out a part number with beede on the la2a meter. This is a first introduction and overview of the iconic tube opto compressor explaining the controls as well as the major components on the back. We take a look at logics compressor settings circuit types and try to emulate the classic teletronix la2a compressor. Teletronix la2a, universal audio la2a compressor tube. Baja la2a style optical limiter original effect designs complete with verified schematics, layouts and instructions. Universal audio studied not just the sound, but how each and every component.
Teletronix la2a manuals manuals and user guides for teletronix la2a. Teletronix la2a by universal audio thank you for purchasing this reproduction of the teletronix la2a. They provide access to some basic and important components too. The teletronix la2a leveling amplifier rivals only the universal audio 1176 as one of the most revered compressors ever created. The ua teletronix la2a has enough gain to operate as a microphone preamplifier, providing theres sufficient signal from the source and you dont need phantom power for example, a dynamic microphone on a guitar amp can be plugged directly into the la2a.
Thank you for purchasing this reproduction of the teletronix la2a. It can take a harsh vocal or saxaphone signal and make it very musical. Teletronix for sale in uk 6 secondhand teletronixs. Primary use for this particular compressoris for transparent gain reductionon vocals, bass, strings, or horns. Universal audios teletronix la2a hardware compressor. This compressor is completely hand built and its design has remained pretty much the same for more than half a century.
A history of the teletronix la2a leveling amplifier. Companies such as softube, universal audio and d16 go to extreme lengths to model the characteristics of analogue circuits then recreate them as software. Nov 15, 2017 2020 future publishing limited quay house, the ambury, bath ba1 1ua. The la2a leveling amplifier is an audio compressor invented by james f. If im going the route, i wanna follow exact to the schem from the source i think. Logic pro x compressor settings for the teletronix la2a. The original optoelectrical attenuator circuit is responsible for the sound embracing the tracks of many classic recordings in circulation today. The teletronix la2a is probably considered to be the mostrevered and relied upon vocal compressor in history. All project were freely contributed by members and cannot be used for commerciall purposes without consent of the respective owners of the. There are a few schematics for the older units, but i need one for the more current ones 2002 and newer. The teletronix la2a leveler collection puts three of the most coveted incarnations of the iconic teletronix processor at your fingertips. Your offer and purchase constitutes your agreement and understanding of the following.
This exacting reissue by universal audio heralds the return of the teletronix la2a. Tinycad is a schematic drawing software for windows from sourceforge. Mar 30, 2015 teletronix la2a layout look at the green wire going from fuse to ground. Teletronix la2a leveler collection uad audio plugins.
Dia dia is a basic drawing software suitable for drawing block diagrams. Teletronix tlm 21703 general purpose high speed teletronix mullholland drive mkiii in excellent condition. Automatic gain reduction is accomplished by the use of an electrooptical variable. Universal audio la2a leveling amplifier optical compressor. I have all the waves cla comps and almost never use the la2a. The la2a is famous for adding silky smooth warmth to any audio signal. Build your own vintage pro audio equipment diy recording studio gear. The teletronix leveling amplifier will automatically reduce audio peaks which might otherwise over drive broadcast or recording equipment. Top 20 best compressors of all time page 20 of 20 attack. Released under the name teletronix in 1958, lawrences first leveling amplifier, the la1, found its way into the hands of singing cowboy gene autry, who spread the word about this marvellous new tool. Teletronix la2a history and how it works recording forums.
Using a graphic program on my pc, i imported front and rear la2a photos, sized. Teletronix la2a classic leveling amplifier universal. Teletronix la2a product page replacing tubes in your ua analog hardware. Automatic gain reduction is accomplished by the use of an electrooptical variable attenuator, which is placed ahead of the first amplifier stage. Lawrence ii, founder of the teletronix engineering company in pasadena, california in the early 1960s. Universal audio teletronix tubeamplified t4 electrooptical classic la2astyle compressorlimiter, 30hz15khz frequency response, 40db gain, 600 ohms input impedance, 600 ohms output impedance mfr. La2a hardware vs plugin 26th october 2015 on this video we compare the real teletronix la2a universal audio compressor to one of the most popular software versions.
With its gentle, program dependent optical compression and meticulously designed tube amplifier, the la2a is the goto compressor for professional mixers around the world especially for vocals. Jun 11, 2015 heres the most iconic compressors ever made. Bill putnam later purchased this patented technology, continuing to. This manual and any associated software, artwork, product designs, and design concepts. With its gentle, program dependent optical compression, and meticulously designed tube amplifier, the la2a is the goto compressor for professional mixers. Teletronix la2a leveler collection universal audio. The la2a was originally produced in the early 1960s by teletronix, which was later acquired by babcock electronics corporation. However, behind this plain facade lies a unique electrooptical attenuator system that allows for instantaneous gain reduction with no increase in harmonic distortion.
Teletronix founder jim lawrence first used photocells for controlling audio gain in the early 1960s. Uad teletronix la2a legacy by universal audio plugins. England and wales company registration number 2008885. Recproaudio pro audio equipment diy recording gear. Like the hardware, the la2a silver, la2a gray, and la2 models offer distinct variations in time constants, compression knee, headroom, distortion, program and frequency dependence, and more.
Diy universal audio teletronix la2a compressor build your own vintage. Seriously though, i was trying to build a 9v pedal to mimic the sound and response characteristics of the famous teletronix la2a broadcast limiter, and it uses optocouplers and senses the input signal before the voltage gain recovery amplifier in this respect it operates far differently than any vca feedback agc based design that i am aware. The teletronix la2a is a classic tube compressor designed in the late 50s for and built under different manufacturers names over the years. Universal audio teletronix la2a tubeamplified t4 classic. A collection of broadcast equipment manuals, catalogs, radio station pictures and broadcast information. True to the original design and performance, the contemporary la2a has all of the high frequency glow and huge tone that made the vintage units a staple in studios. It supports circuit drawing, layout developing and circuit simulation.
Originally introduced way back in 1965 by teletronix, the la2a went out of. Teletronix la2a classic leveling amplifier universal audio. The universal audio la2a reissue represents the rebirth of a studio classic. The teletronix la2a leveler collection for the uad powered plugins platform and apollo interface puts three stunningly accurate incarnations of the iconic teletronix la2a at your fingertips. La2a compressor pro audio diy equipment diy vintage teletronix universal audio la2a compressor which makes me wonder why the choice of a 250v, when the schem states 500v. It has a 1,000 squarefoot tracking room and a large private lounge that includes a living area, dinning area, private office and private bathroom. La2a leveling amplifier by universal audio dynamics. Teletronix la2a leveling amplifier history of recording. The teletronix leveling amplifier, model la3a, will automatically reduce audio peaks which might otherwise overdrive broadcast or recording equipment. One of the key growth areas in music software over the last decade has been the market for emulations of classic hardware. My father purchased the product rights and the name. We have 2 teletronix la2a manuals available for free pdf download. And by emulations, we really mean painstakingly accurate modelling of the behaviour of those classic units a huge step up from some of the.
Documents, presets, manuals universal audio teletronix la2a. The teletronix la2a leveling amplifier is practically the definition of vintage audio gear. Smooth, natural, and eminently musical, the legendary la2as tubedriven electrooptical attenuation circuit delivers instant gain reduction with zero increase in. His ingenious optical compression design was a technological breakthrough, far surpassing the stability and transparency of earlier circuits. Around a hundred la1s were built before the design was improved with a bigger meter and the nowfamous t4 optoattenuator capsule. Teletronix la2a schematic there are a few schematics for the older units, but i need one for the more current ones 2002 and newer. This beautiful studio features a 72 channel solid state logic 9072 j series console with a large selection of outboard gear. Buy universal audio teletronix la2a classic leveling amplifier exacting recreation of original la2a hardware unit featuring true to original, pointtopoint hand wired, t4 electrooptical attenuator, instantaneous gain reduction with no hd, tubedriven, handbuilt in usa. The teletronix leveling amplifier will automatically reduce audio peaks which might. Ik multimedia, apple logic, native instruments and waves each have their solutions for getting the la2a inthebox. The net result is that we can all now get our hands on incredibly realistic emulations of units as diverse as the roland tr909, tubetech cl1b and studer a800. View and download teletronix la2a instruction manual online. I started picking parts for the build going off this.
Unfollow teletronix la2a to stop getting updates on your ebay feed. In 1967 studio electronics eventually renamed urei, picked up babcocks broadcast division, including the teletronix brand. Still built today by universal audio, the la2a is a handwired optical tube compressor, arguably the best one. In 1958, jim lawrence founded the teletronix engineering company in pasadena, california, manufacturing broadcast products such as transmitter tubes, emergency tone generators, and fullscale radio transmitters. Teletronix la2a compressor, pultec eqp1a program equalizer, 1176 limiter, fender tweed deluxe 5e3 guitar amplifier, vacuum tube instrument direct box and more. This build based upon my la2a layout derived from the original universal audio teletronix 1968 la2a schematic is an accurate representation of the late 60s original, as well as the current reissue. They will sell the exact same meter minus the teletronix logo on the meter scale, correct sensitivity, tolerance and scale deflection. Nov 24, 20 using the logic pro x compressor to control the dynamic range of a lead vocal.
Free electronic circuit diagramschematic drawing software. As is denotes that the seller is selling, and the buyer is buying an item in whatever condition it presently exists, and that the buyer is accepting the item with all faults, whether or not. J the 12ax7 vi voltage amplifier is also controlled by the manual gain control. Universal audio teletronix la2a classic leveling amplifier.
Universal audio teletronix la2a classic leveling amplifier la2a. It has only two rotary controls, one for gain and one for peak reduction. This video describes and illustrates the first process of the build. This is classic optocompressor, which uses electroluminescent panel and photoresistors to provide gain reduction. Uad teletronix la2a legacy by universal audio plugins vst. Teletronix la2a classic leveler collection plugin, software compressor from universal audio in the uad plugin series. Does anyone have, or know where i can find schematics for the more modern teletronix la2a. The teletronix la2a features a unique tubedriven electrooptical attenuator system the famed t4, which allows instantaneous gain reduction and no increase in harmonic distortion. Next to the fairchild 670, the teletronix la2a is argueably the most popular compressor ever made.
Teletronix was sold to babcock electronics of costa mesa, california in 1965. A case could also be made for the urei 1176ln, as well. The teletronix la2a the la2a leveling amplifier is an audio gain reduction device, invented by james f. Please read the definition of as is below before buying. His first leveling amplifier was the teletronix la1, of which only about one hundred units were ever made. Just one amp stage on the la2a, and the programfrequency. Easy to copy the scale considering keith has provided a scan of one on kruzs site. If i could get a parts list, that would be great too. By todays standards, the teletronix la2a leveling amplifier from universal audio appears to be a rather primitive compression device.
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