something that sounds great, looks great, and works great. You can buy all the variations here. per channel into 8 Ohms, and nearly twice that into 4 Ohms. xb```f``ba 5 faMX~I33021` 0l@@C -D f
A pair of assembled and tested circuit boards costs $139. 2020-07-27T22:50:02-07:00 brochure has 5 pdf files of about 6 Mbps each. The PCB has a different grounding arrangement which allows the LEDs to run more brightly. Here's a short list: Q. Even if it's working, you can make it sound better than it ever sounded. Upgrade your phono stage with the quietest phono preamp out there. the wire and screws youll need from the old Stereo 120. As I studied engineering and analog design, Id marvel at all the You can even replace the, Just looking for good information? Q. The result was the cross-over distortion that came to be the unpleasant hallmark PAT4 Better Balance Control Replacement Manual. Dynaco super-fidelity output transformers catalog - tubebooks.org. Q. startxref
Forty years of progress later, we can do a lot better. with transistors so expensive, that was a good choice. stereo power amplifier kit. It had some problems, though, mostly hj0_e+Yrjh{(`R We've got the stuff that lets you make your Dynaco Stereo 120 Power Amp and PAT-4 Preamp better than new. site Power Output: Typically 60 Watts Per Channel into 8 Ohms before limiting. Removing the old amplifier modules, saving some parts for re-use. youtube video reviews soldering technique, Hirsch-Houck Labs Test of Original Stereo 120, Dynaco Stereo 120 Assembly Manual Pages 1-3, Dynaco Stereo 120 Assembly Manual Pages 4-8, Dynaco Stereo 120 Assembly Manual Pages 9-13, contains schematics and parts list, Dynaco Stereo 120 Assembly Manual Pages 14-18, assembly directions, Dynaco Stereo 120 Assembly Manual Pages 18-21, serivce info and wiring diagram/layout, Dynaco Stereo 120 Assembly Manual Pages 22-23, assembled view and PCB layouts, Dynaco Stereo 120 Assembly Manual Page 24, Stereo 120 Later Schematic adds C14, C15, and R29, Power Supply Circuit Description and FAQs, Original Amplifier Module Circuit Description, diyAudio, projects by fanatics, for fanatics. Do you want to keep your amp cooler while driving it harder? 4.9 Mb pdf file Improvement Kit here. Are you sure you want to delete your template? Hooray! site Were here to say that the site Better bass for original Dynaco amplifier modules. new. The updated amplifier modules have been improved. Q. ), Dynaco 1975 Full Line Catalog (13 Mbytes), The difference in power delivery to varying loads between tube Please have a look at the product and the assembly manual. You might want to try: You'll be just as happy with our kits that make your Dynaco PAT-4 Preamp sound even better than new. We've been doing this long enough that some products and/or PCB revisions are obsolete, e.g. Trouble shooting a concert hall, house of worship, broadcast station or recording studio can take hours. The UpdateMyDynaco Stereo 120 has almost no distortion at a half Watt of output: The second harmonic is down 92 dB, while the few other harmonics are more than 110 dB below the fundamental! Just pick the upgrade kits PA060 S Dynaco ST70 Upgrade Power Transformer Replacement - MADE IN USA ***PRE-ORDER NOW, MORE READY 4 WEEKS***, A470 S Triode USA Ultralinear Output 35W/70W for Dynaco Replacement MADE IN USA ***PRE-ORDER NOW, MORE READY IN 4 WEEKS***, A431S Triode USA Output Transformer for Dynaco 4300 Ohm 60W/120W for Dynaco MADE IN USA - IN STOCK NOW. The output capacitor stays very linear owing to the constant bias voltage. The kit costs $89. along with protection circuits that make your amp nearly bullet-proof. amplifier modules. What IC is the design based on? Mounting the new PC boards, and completing final assembly. Pick just the parts you need at the Updatemydynaco Store to bring your Dynaco Stereo 120 Power Amplifier back around the beginning of November 2013. update kit with the super duper heat sink option, C12UU kit, and PSUG power supply upgrade. That crossover distortion was one of the most recognizable shortcomings of early Looking for something on the updatemydynaco website? 0
The update kit consists of new amplifier modules that you build. improvements. Our detailed construction manual guides you step-by-step through the process. PAT4 enhancement kit for a quieter, cleaner line stage. To keep the assembly process simple, we've written manuals tailored to each kit. your sound? Not finding what youre looking for? The general hook-up wire used within the amps was typically 20 AWG, with a nominal conductor diameter of 32 mils. distortion. The kit uses all through-hole components. Too many improvements to talk about on this page. "#$%&'()*123456789:ABCDEFGHIJQRSTUVWXYZabcdefghijqrstuvwxyz ? We supply solder and all the hardware youll need. transistor amps. 0000000996 00000 n
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$2(! Bandwidth: -3 dB small signal bandwidth at 6 Hz and 60 kHz into an 8 Ohm load, Distortion: 0.02% typical, or less, for any level below clipping into 8 Ohms, Noise: 0.05 mV typical in a 100 kHz Bandwidth, shorted or open input, Output Impedance: 90 milli-Ohms typical, measured at the speaker binding posts, at 1 kHz. Iso-Max delivers the widest bandwidth for picture perfect results in analog & digital mediums. How long does it take to assemble? Your file is uploaded and ready to be published. Building the new amplifier boards takes about 90 minutes each. The scans are in color, and the 16 page regulated power supply is often the answer. If you're having trouble viewing the manuals in Firefox, the following tip may be helpful. Stuffing and soldering the new PC boards. Jensen offers a complete range of transformers for the most demanding audio designs. The new design uses only poly-film caps or Stereo 120 - increases C7 from 3300 to nearly 10,000 F on both channels, Stereo 80 - increases C7 from 5000 F to nearly 10,000 F on both channels, SCA-80(Q) - increases C7 from 5000 F to nearly 10,000 F on both channels. We've included some (but not all) of the improvements I always liked the look of the amp, its size and its shape. All shipments are by USPS Priority mail. Replacement Speaker Relay assembly for Stereo 400 Power Amp, Replacement C9 for the SCA80, doubles capacitance for lower noise and better bass, Replacement C11 for the SCA80, tighter, quieter regulated supply for the preamp sections, Upgraded Power Supply for the PAT5 has 100 times better regulation and lower noise than the original, Stereo 120 Complete Rebuild Kit Assembly Manual, Stereo 120 Rev B and C assembly manual, covers re-used and super heatsink assembly, Stereo 120 EZTOP Plus C12 Cap Upgrade Manual, Stereo 120 Power Supply Replacement Kit assembly manual, Rev D PCB, shipping as of 9/9/2018, Stereo 120, Replacing the stock power supply heatsink with a Really Big Heatsink, Stereo 120, Replacing the stock amplifier heatsinks with Really Big Heatsinks, Stereo 120 Power Switch Replacement manual, Stereo 120-Power on/power off speaker mute (ST120PM), Stereo 120/Stereo 80 RCA Jack Upgrade Manual(RCAJ2), Stereo 150 Replacing and Upgrading the Power Supply Capacitors, Stereo 150 Replacing and Upgrading the RCA Jacks, PAT-4 Electronically Regulated Power Supply Manual(Rev C, Shipping after August 1, 2020), PAT-4 Phono Preamp Upgrade Kit Assembly Manual, Convert the PAT4PPR Phono Preamp to PAT5 Applications Assembly Manual, PAT-4 Line Stage Replacement Components Kit, PAT-4 Gold Plated Replacement RCA Jack Kit, Rev B, kits shipped after about Feb 1, 2017, PAT-4 Selector Switch Assembly and Installation Manual, PAT-4 Chassis Signal Capacitor Installation Manual, PAT-4 Renewal (Line stage and phono amp) Installation Manual, PAT4 and SCA80 Replacement Volume Control Installation Manual. and transistor amps. A. corrections. That was necessary because the original If the PC-15 voltage regulator is bad, you can replace it with the, If the filter caps (C9, C11, and C12) have gone bad, they can be replaced with the, If you're looking for incredible energy storage, you can even install the, Paper towels and Isopropryl alcohol (to clean thermal compound off old heat sinks). With the PAT-4PWR kit, the hum is finally gone". function the Dynaco guys crammed into those few transistors. ), -- Clean it up with the, Are you having trouble with your high level stage? With our attention to detail you can be assured that your restored vintage transformer will look AND sound exactly as it did. power with its orange glow in a darkened room. In 1968, that was the good life! 510 (1951?) 4 to 8 dB of SNR improvement is just the start. Tamura audio hUMk0+k-&m-=N }CK)hl7fF@ABpH b#R)(aAL& Check out the. Q. 2001-01-29T19:10:18-05:00 quality, timeless parts of the Stereo 120, and replace the parts, e.g. 0_%O`?:Qoah]noo\Dz&5$H@%h@`,@ (PAT5PM15), Stereo 400 Relay Kit Installation and Assembly Manual, Stereo 400 RCA Jack Installation and Assembly Manual, SCA80(Q) Replacement RCA Jacks Assembly Manual, SCA80 Replacement for C9 Installation and Assembly Manual, SCA80 Replacement for C9 Installation and Assembly Manual, Rev B shipped after end of April 2019. (PAT5PM), PAT-5 preamp, building the efficient power supply that supplies only plus and minus 15 volts. 0000000691 00000 n
Power Supply Replacement used in the amps and for the output inductors was 16 AWG, with a nominal conductor diameter of 50 mils. This youtube video reviews soldering technique. -r&d'O It reduces the assembly time by more than 1 hour. The original UpdateMyDynaco kit recycled the original Dynaco heatsinks. PAT-4 Electronically Regulated Power Supply Manual (Rev A). UTC catalog ---. Capacitor Kit. Heres a set of pdf files with high resolution scans of an original Stereo 120 assembly manual, plus information on the SCA80Q integrated amp. UTC a sheet with revisions. I've started a collection here with a few useful documents. Each transformer is manufactured and tested to deliver the utmost quality. to tunes on equipment built by you! Replace it with an. the amplifier and power supply regulator modules, where technology has made the most pdf file TCS kit, This kit produces rock steady, extremely low noise power supply voltages for the PAT-4 Preamp. Is there somewhere I can get a refresher? Are your amplifier modules beyond repair? The following plot compares 1 kHz THD+N versus output power for the old (original) and new (UpdateMyDynaco) designs. Does your 40+ year old Stereo 120 still have working amplifier modules? ! That gets you two 60 Watt Amplifier module kits. Rev A stopped shipping You can buy the modules in kit form, or assembled. You can instantly compare your sound with and without tone control These kits are incredible values. so you'll have to wait a little bit to get one. One Electron transformer web site You have already flagged this document.Thank you, for helping us keep this platform clean.The editors will have a look at it as soon as possible. Submit a Technical Question. Add in the. of "transistor" sound. Q. For over 40 years, Jensen Transformers Inc has set the benchmark for delivering the highest quality transformers, with the widest frequency response, least distortion, lowest phase deviation, best common-mode noise rejection and maximum signal handling. Our engineering team is available to assist with your designs. Stereo 120 Super Heatsink Option assembly manual (showed Rev A amps). The amplifier modules are built on high quality 2-layer FR-4 PC Boards. have dead or dying amplifier modules. Recap your Stereo 80 for better bass, more power, and lower noise. In 1966, Jensen audio transformer web Just the power transformer. YUMPU automatically turns print PDFs into web optimized ePapers that Google loves. It's actually true! trailer
like to keep their Stereo 120 original. h site PAT-5 Line Stage Replacement Circuit Boards, PAT-5 Phono Stage Replacement Circuit Boards, PAT-5 preamp Installing new tone control pots, PAT-5 preamp, building and installing the power-on/power-off mute circuit board. Tom P sent along these very nice scans of the 1975 full-line Dynaco brochure (note: Big File- 13 Mbytes, 24 pages). unipolar elecrolytics under constant bias, to minimize all types of distortion. We think you'll love You recycle the The original black heatsink on the left is only 1/8" thick and has no fins. I've run across a few white papers from Dynaco that explained various things in the audio world. Catalog from 1955 - has classic hi-fi amp circuits, too! input transformers (from a sheet found in a Thordarson box), %%EOF
How much of the old Stereo 120 has to work? How is the new design different or better than the original design? q7 $#U:w`0OwT{R9 6%4(^KAw%oQm` c pu F 1z%p I A$zht:L :_htI,AT:%Dvxam&<
OF,#\KfZIV@7Nmbkn inductors used about 6 feet of wire. Lou Garner and GE, Car radios were once run in Class A, 1962, Transformer coupled 100 Watt Delco Power Amp, from 1965, JBL's Classic T-Amplifier, from 1967, much closer to modern designs, Ampzilla, one of the first of the Super Power Amplifiers, from 1974, Marshall Leach's Low Tim Audio Power Amplifier, A pre-Dynaco designed Ultra-Linear Tube Amp by David Hafler, Dynaco introduces the center channel speaker connection, A catalog of transformers and tube amp designs, ca. (Notethe absolute power numbers may be off by a few percent) The overall decrease in THD+Noise for both amps with increasing power just
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What wire gauge did Dynaco typically supply for hook-up wire? i!73 ABbH#$I@ARhK50._*ySTgAm,0'yQv]s9>64?%y9 Catalog S-106 from 1961. A. Iso-Max eliminates ground loops in high-fidelity 2-channel and home theater systems with purpose-built solutions that work. pf[tp^(`hVajcg~)xu&N
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qhxhXrmelM tx1> Z2|@AqH9,l5@5QM xk)Mi!>b!Lbyq@jba# R$@M`t@;j/-$R! CineMag Transformers web site Many old Stereo 120s The improved version is called Rev B. all the soldered points, making assembly easy.Check out our YouTube video, where we summarize the assembly process. endstream
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If you're visiting this web site, you probably enjoy Audio DIY as a hobby. 1950, Mcintosh MC30, a 30 Watt Mono amp with the famous cathode coupling, from 1950, Products and Information for tube amp construction, Mods and upgrades for Dynaco and Eico Tube Amps, Dynaco Stereo 70 mods, site also known as Vacuum Tube Audio, Brochure covers the Dynaco Product line in 1972 (6 Mbytes), 1972 (?) We have a number of kits to make the SCA-80(Q) better than new. 0000000416 00000 n
The circuit board has been specially designed with generous spacing between Improving these stages improves the whole preamp. Youll recover (730K bytes), Importance of Correct Phasing in Stereo (280 kbytes), Motorola Power Transistor Substitution and Cross Reference Guide, Added components give quiet turn-off even when paired with C12 Upgrade kits (the original design required the quiet turn-off mod to be retro-fit into the board). Here are a series of testimonials from our customers. There are a number of ways. Commercial/ Industrial Transformers Note that the old design distortion increases a bit at first, indicating crossover distortion. Are your RCA Jacks oxidized? uuid:296a6cf1-7ecc-440d-af09-dc06d637cd75 If the old PC-15 voltage regulator and power supply capacitors work, then you only need to replace the bypass of the tone controls. level hum. marginal for heavy duty use. Freefind makes a great site search tool. Ordering the Super Duper Heatsink Option has added benefits: Order the Super Duper Heatsink Option from the UpdateMyDynaco store. We recycle a number of the bits into the updated design. It biased the output stage and provided a gross limit on output current. The new design runs closely controlled output stage quiescent current, eliminating crossover distortion, so the amp is transparent. involves subtle design improvements or increased ease of assembly. Replace your power supply and power amp modules with cleaner, quieter, more musical sound. [note: this is a work in progress], Entries listed in green are data In the adjoining space in the right ("Action") column, select "Use Adobe Reader (default)". the words "Adobe Acrobat". The original ones. Go to Tools=>Options, pick The manual specifically instructed to do high power high frequency tests quickly Magnaquest transformer web This indicates a relative absence of crossover Q. improved, drop-in compatible replacement. Please have a look at the product and the assembly manual, You may find tone controls really useful, but perhaps you worry a bit about their effect on the sound. And you built it! The old design's power bandwidth was a bit iffy. Collection of Reviews (35 Mbytes! Here are some scans of historic documents about the Stereo 120. Bob Cordell is a great engineer and a DIY hobbyist. endstream
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The original Stereo 120 had significant crossover distortion, visible as extended numbers of high harmonics at small Has your PAT-4 Preamp always had a hum? Here are some links you may find interesting: The Stereo 120 wasn't the only history making amplifier, here are a few others: These tube amps were designed by Hafler and Keroes before there was a Dynaco: An older Audio Research and Mcintosh Design: These web sites have some interesting material on tube amps: I found some lovely old brochures in my filesa short (4 page) brochure, and a long (16 page) brochure. Please take a look here at the ordering information and assembly manual for the However, the speaker wire ---AlabamaAlaskaAmerican SamoaArizonaArkansasCaliforniaColoradoConnecticutDelawareDistrict of ColumbiaFloridaGeorgiaGuamHawaiiIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaNorthern Marianas IslandsOhioOklahomaOregonPennsylvaniaPuerto RicoRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVermontVirginiaVirgin IslandsWashingtonWest VirginiaWisconsinWyomingAlbertaBritish ColumbiaManitobaNew BrunswickNewfoundlandNova ScotiaNunavutNorth West TerrOntarioPrince Edward IsQuebecSaskatchewanYukon. You can build a, Are you suspicious about the state of 40 year old capacitors? Its easier than a jig-saw puzzle, and a lot more fun. 45 0 obj<>stream
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The 10X distortion reduction brings the PAT-4 to state-of-the alcoholthey are a flammable combination. Don't refer to these manuals unless you have an older product. The old design used 8.64 Watts (120 mA) per channel just heating up a pair of 300 Ohm resistors, and everything near them. Adobe d
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$2(! Are the RCA input jacks corroded? Value changes slightly increase the maximum output power prior to clipping. The Electronically PAT-4 Gold Plated Replacement RCA Jack Kit, SCA80 Replacement for C11 Installation and Assembly Manual, Stereo 120 Power Supply Replacement Kit assembly manual, PAT-4 Electronically Regulated Power Supply Manual(Rev B). Our Update Kit for the Dynaco Stereo 120 lets you rescue your Dynaco from demise in the dumpster and make it better than new! Stancor
&-(0/,(,+28H=25D6+,>U?DJLPQP0. (2;4222;;;;;;;;;;;;;;;;;@@@@@;@@@@@@@@@@@@@@@@@@@@@ ? " Lots of people used to build electronic kits. This is the latest product, and it's a drop-in version that doesn't need helper resistors. Mercury offers Transformer Restoration Services for rare and vintage transformers that are failing or underperforming. power supply and chassis, and replace the old amplifier modules with the new. P782 S Power Transformer (for Dynaco Mk3 & Mk2, Sunn) MADE IN USA - NEXT RUN READY IN 8 WEEKS, PRE-ORDER YOURS NOW! Just isopropyl alcohol and some paper towels for clean-up. 0000000887 00000 n
The Classic link for lots of Dynaco stuff is here: Tubes 4 hifi specializes in tubes and tube based mods for Dynaco equipment. Do I need any supplies that arent in the kit? A. High-Level) stages. At the minimum, youll need: Its also handy, but not necessary, to have: Q. I haven't soldered for a while. The links ]w@!83&6w"4 M}z
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We even supply the thermal compound you need. The updatemydynaco assembly manuals typically have all the information you need to make your Stereo 120 better than new. Akitika's PR-101 preamp has transformers, 489K pdf file The capacitors eventually die, and sound suffers. uuid:240f7d64-6203-4457-8004-e2040a84a741 In a few short hours youre ready to listen Either form still leaves a lot of fun for you ripping out the old stuff and putting in the new. Jensen Iso-Max moving coil step-up transformers are now available for the most demanding audiophile. power transformer, and power supply. related to under-biasing of the output stage. tube Dynaco kits. Compared to the original heatsinks, it allows the amp to deliver more power for longer before protective thermal mechanisms trigger. The resistors are metal film, mostly 1% tolerance. If you can stay calm and follow directions, you shouldnt have any trouble. A. Electronically regulated power supply for the PAT-4, ordering information and assembly manual for the Probably less than 5 hours of work. current manufacturer's web sites. Q. See the Stereo 80 Replacement Cap Kit in the store, Set of four vinyl feet. What can I do? Check out the PAT4 Phono Preamp Youll need an old Dynaco Stereo 120, as you will re-use its chassis, Critical signal path capacitors have high You can build, Did your power supply board melt-down? Some information about vintage parts is getting tough to find. Stereo 120 Updating amplifier modules, changing to super heatsinks, and replacing power supply capacitors at the same time (Showed RevA amp modules). Amplifier LTspice, an absolutely free, absolutely great spice circuit simulator. linearity NPO or poly-film dielectrics. For more info please emailor call us: 818-998-7791 for a quote. The old design used a number of bipolar electrolytic coupling caps in the signal path. of the GT-101 amplifier modules into the TCK modules. '()*789:EFGHIJUVWXYZfghijuvwxyz ^C 9fOR]ej?cO 18.H\DM-SUm^M/fWmw
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R;)636dP. This field is for validation purposes and should be left unchanged. Q. The new design precisely biases the output stage and safely limits output current while saving almost all of that power. Let's say you don't have a Stereo 120 to update, but you still want to build a power amplifier kitOne that puts out more than 50 Watts That's why we've introduced the Super Duper Heatsink Option. You can get seriously high-end sound out of your Dynaco Stereo 120 Power Amp, PAT-4 Preamp, or SCA80 Integrated Amp. catalog, with various schematics, including