Replace your power supply and power amp modules with cleaner, quieter, more musical sound. ), Dynaco 1975 Full Line Catalog (13 Mbytes), The difference in power delivery to varying loads between tube 0000000416 00000 n transistor amps. That's why we've introduced the Super Duper Heatsink Option. This kit gives you a switched stereo power amplifier kit. (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. c !1AQ"aq2#$6BCrs345DRSTbt%cd&e &-(0/,(,+28H=25D6+,>U?DJLPQP0.
update kit with the super duper heat sink option, C12UU kit, and PSUG power supply upgrade.
site
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In the adjoining space in the right ("Action") column, select "Use Adobe Reader (default)". The updated amplifier modules have been improved. Are you sure you want to delete your template? dynaco dynakit The following plot compares 1 kHz THD+N versus output power for the old (original) and new (UpdateMyDynaco) designs. of the GT-101 amplifier modules into the TCK modules. modules, super heatsinks, replacement capacitors, power supply replacements, beautiful blue lights and even new feet! 
PAT4 enhancement kit for a quieter, cleaner line stage. application/pdf the way your PAT-4 sounds when you install this new power supply. It had some problems, though, mostly Are the RCA input jacks corroded? 
quality, timeless parts of the Stereo 120, and replace the parts, e.g.
Check out the. Is there somewhere I can get a refresher?
4 to 8 dB of SNR improvement is just the start. You can buy the modules in kit form, or assembled. site 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. We've got the stuff that lets you make your Dynaco Stereo 120 Power Amp and PAT-4 Preamp better than new. The new design has no such limitations.
The Old design ran zero quiescent current in the output stage, which made crossover distortion, and "transistor sound" inevitable.
Q. I don't see the answer to my question here. 
If you can stay calm and follow directions, you shouldnt have any trouble. Commercial/ Industrial Transformers
Sowter audio transformer web The old design's power bandwidth was a bit iffy. 
Power Supply Replacement Hammond transformer web At just $5.00, this kit has to be the best value in high-end audio. dynakit dynaco Hooray! Adobe d
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submitted by Tom Fine (thanks Tom! Every sound in the PAT-4 Preamp goes through the Line-Level (sometimes called tube circuit diagram electronic audio 510 (1951?) ), -- 
around the beginning of November 2013. Amplifier Douglas Self has great books on Audio design, and interesting stuff on his web site. 
site dynaco sunn 200s transformer
Stuffing and soldering the new PC boards. The new design runs closely controlled output stage quiescent current, eliminating crossover distortion, so the amp is transparent. I always liked the look of the amp, its size and its shape.
related to under-biasing of the output stage. TCS kit, This kit produces rock steady, extremely low noise power supply voltages for the PAT-4 Preamp. /G
input transformers (from a sheet found in a Thordarson box), 6v6 6sl7 schematics elettrico amplificatore valvolare schma dynaco tubo 6l6 zapojen trioda amplificador amplifiers placa 12ax7 schematy elettronica impresso esquemas 4.9 Mb pdf file art levels. The old design used 8.64 Watts (120 mA) per channel just heating up a pair of 300 Ohm resistors, and everything near them. regulated power supply is often the answer. 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. function the Dynaco guys crammed into those few transistors. In 1966, 
the described item. The neon-illuminated crystal clear rocker switch promised
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Electronically regulated power supply for the PAT-4, ordering information and assembly manual for the Heathkit, Eico, and Dynaco let anyone assemble great stuff and save a lot of money.
Jensen Iso-Max offers a host of plug & play solutions that eliminate noise while delivering exceptional audio quality. Replace them with the, Have your old feet fallen apart? You can instantly compare your sound with and without tone control 2020-07-27T22:50:02-07:00 It reduces the assembly time by more than 1 hour. With our kit, you recycle and reuse the highest You can buy all the variations here. UTC 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. 
What IC is the design based on? Value changes slightly increase the maximum output power prior to clipping. The update kit consists of new amplifier modules that you build. Adobe Acrobat Pro 2017 17 Paper Capture Plug-in
of "transistor" sound. site power with its orange glow in a darkened room. 
Youll recover Disassembly takes about 1 hour. Here are some scans of historic documents about the Stereo 120. Collection of Reviews (35 Mbytes! Q. Critical signal path capacitors have high kt88 kardon harman amplifiers dynaco cit wzmacniacz lampowy tuburi electronice simulari el34 a420 elforum NewVolt Automotive Amps. The Electronically How much of the old Stereo 120 has to work? 
the wire and screws youll need from the old Stereo 120. 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 words "Adobe Acrobat".
reflects that noise is a smaller part of the output as the input level increases. Just pick the upgrade kits As I studied engineering and analog design, Id marvel at all the
involves subtle design improvements or increased ease of assembly. It replaces the seldom used high-filter. amplifier el84 schematic 6aq5 6v6 6bq5 level hum. 
Just be careful about paper towels and isopropyl You can feel the great feeling of accomplishment that comes from building a kitYou begin with a collection of quality parts, and end with
of interesting links.
Please have a look at the product and the assembly manual. That was necessary because the original The Classic link for lots of Dynaco stuff is here: Tubes 4 hifi specializes in tubes and tube based mods for Dynaco equipment. improved, drop-in compatible replacement. Does your 40+ year old Stereo 120 still have working amplifier modules? Each transformer is manufactured and tested to deliver the utmost quality. great sound, optional phono and headphone amp modules, and a standard (pre-built) remote control is included.
Submit a Technical Question. It's all here. H*234R0 B#=cK s=s \ ; 18 jpeg images.
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to prevent damage. 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. Iso-Max delivers the widest bandwidth for picture perfect results in analog & digital mediums. 0 Scroll down and look in the left ("Content Type") column until you see any entries that include here are to either old catalog data, manufacturer's data, or to Q.
alcoholthey are a flammable combination. Even if it's working, you can make it sound better than it ever sounded. 2001-01-29T19:10:18-05:00 Just the power transformer.
Dynaco super-fidelity output transformers catalog - tubebooks.org.
[note: this is a work in progress], Entries listed in green are data
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transformer catalog from 1996, in Japanese, 845K pdf file The result allows the LM3886 to deliver significant 4 Ohm power, more Click on the links to download %PDF-1.6
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dynaco reviving new. Magnaquest transformer web Ordering the Super Duper Heatsink Option has added benefits: Order the Super Duper Heatsink Option from the UpdateMyDynaco store.
Dynaco transformer Jensen Iso-Max moving coil step-up transformers are now available for the most demanding audiophile.
for Dynaco Mk3 Transformer Bundle w/ choke MADE IN USA, ST70 Transformer Bundle w/choke for Dynaco MADE IN USA, C354 Dynaco Choke Replacement also Sunn 3-10C MADE IN USA. The kit costs $89. On top of that, building the kits was relaxing, educational, and rewarding. amplifier modules. YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Tom P sent along these very nice scans of the 1975 full-line Dynaco brochure (note: Big File- 13 Mbytes, 24 pages). Forty years of progress later, we can do a lot better. Here are his DIY designs. Q.
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Replace them with our, Improve your power supply and get better bass. Looking for something on the updatemydynaco website? Assembled and Tested Power Supply Upgrade for Regulator, Distortion Reduction Kit for PAT-4, an unbelievably economical, Tone Control Switch for PAT-4, replaces the HI FILTER that, Take C12 from stock 3300 F to 20,400 F for better Bass, Improve the sound of your PAT-4 Preamp with an electronically Regulated Power Supply, Assembled and Tested electronically Regulated PAT-4 Power Supply, PAT4 Power Transformer Upgrade Reduces Hum, Makes a huge difference to the sound of the phono preamp. Just isopropyl alcohol and some paper towels for clean-up. The original Stereo 120 crossover distortion harmonics are down 60-70 dB: The UpdateMyDynaco Stereo 120 has harmonics in the noise floor, more than 100 dB below the signal. Not at all. to tunes on equipment built by you! Anyone who has worked on old electronic equipment runs into 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). terminal arrangements - for A, HA, HC, HP, LS, O, and P audio 
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Some information about vintage parts is getting tough to find.
The assembled and tested version is currently built to order, 
than 100 Watts! The general hook-up wire used within the amps was typically 20 AWG, with a nominal conductor diameter of 32 mils. If the old PC-15 voltage regulator and power supply capacitors work, then you only need to replace the 
Stancor transformer web site
What wire gauge did Dynaco typically supply for hook-up wire? 0000000996 00000 n
Bob Cordell is a great engineer and a DIY hobbyist. Do you want to keep your amp cooler while driving it harder? tube vacuum amplifier audio buxus abstract diagram schematic bobcat cleaners vacuums ignition switch el84 pp box electronic schematics valve audiophile We are constantly adding new products to our catalog for the most up-to-date information, please email or call us: 818-998-7791. ---. Thordarson Q.
Q. The design is based on National Semiconductor's LM3886. Capacitor Kit. It biased the output stage and provided a gross limit on output current. power supply and chassis, and replace the old amplifier modules with the new. Youll need an old Dynaco Stereo 120, as you will re-use its chassis, (PAT5PM), PAT-5 preamp, building the efficient power supply that supplies only plus and minus 15 volts. good times are back! dynaco transformer st70 el34s 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. Check out his book and other good stuff. One Electron transformer web site You can get seriously high-end sound out of your Dynaco Stereo 120 Power Amp, PAT-4 Preamp, or SCA80 Integrated Amp. Let's say you don't have a PAT-4 or PAT-5 Preamp to update, but you still want to build a Pre-amplifier kit. A. !,2 @osswoCy@et.B]V%pM 04Ft&TQald"e$`1%pzS~;tJ}U9w;.r\G04}MM>.:/(-%2?lWn|_R:u*aKWPnW:gg6V8_ nNt Reassembly takes another 90 minutes. dynaco capped
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Stancor (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). hUMk0+k-&m-=N }CK)hl7fF@ABpH b#R)(aAL&
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You recycle the The original black heatsink on the left is only 1/8" thick and has no fins. Heres a set of pdf files with high resolution scans of an original Stereo 120 assembly manual, plus It sounds great, and uses top-notch components. Trouble shooting a concert hall, house of worship, broadcast station or recording studio can take hours. I've run across a few white papers from Dynaco that explained various things in the audio world. per channel into 8 Ohms, and nearly twice that into 4 Ohms. We think you'll love Improving these stages improves the whole preamp. It's actually true! All shipments are by USPS Priority mail. the amplifier and power supply regulator modules, where technology has made the most The new design's distortion 
Too many improvements to talk about on this page. Compared to the original heatsinks, it allows the amp to deliver more power for longer before protective thermal mechanisms trigger. Lundahl transformer web 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 This field is for validation purposes and should be left unchanged. (Notethe absolute power numbers may be off by a few percent) The overall decrease in THD+Noise for both amps with increasing power just Many old Stereo 120s
but have a base-plate that's twice as thick, along with additional 1/4" fins. TCS kit, Assembly and Installation Manual for the PWRAMP80 Kit. endstream endobj 38 0 obj <> endobj 40 0 obj <> endobj 49 0 obj <>stream linearity NPO or poly-film dielectrics.
At the minimum, youll need: Its also handy, but not necessary, to have: Q. I haven't soldered for a while. inductors used about 6 feet of wire. See the Stereo 80 Replacement Cap Kit in the store, Set of four vinyl feet. and transistor amps. Probably less than 5 hours of work. Iso-Max eliminates ground loops in high-fidelity 2-channel and home theater systems with purpose-built solutions that work. Recap your Stereo 80 for better bass, more power, and lower noise. information on the SCA80Q integrated amp. The PCB has a different grounding arrangement which allows the LEDs to run more brightly. High-Level) stages.
This indicates a relative absence of crossover 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. You can build, Did your power supply board melt-down?
have dead or dying amplifier modules. And you built it! 
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Stereo 120 Super Heatsink Option assembly manual (showed Rev A amps). 
Mounting the new PC boards, and completing final assembly. A. P782 S Power Transformer (for Dynaco Mk3 & Mk2, Sunn) MADE IN USA - NEXT RUN READY IN 8 WEEKS, PRE-ORDER YOURS NOW! h
Akitika's PR-101 preamp has
corrections.
Transformers for Music, Commercial & Industrial. Stereo 120 Updating amplifier modules, changing to super heatsinks, and replacing power supply capacitors at the same time (Showed RevA amp modules). so you'll have to wait a little bit to get one.
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Page - Old Thordarson catalogs, audio articles, plus lots 
LTspice, an absolutely free, absolutely great spice circuit simulator. "#$%&'()*123456789:ABCDEFGHIJQRSTUVWXYZabcdefghijqrstuvwxyz ? The original Stereo 120 had significant crossover distortion, visible as extended numbers of high harmonics at small Acrosound marginal for heavy duty use. A. Akitika PR-101 Pre-amplifier kit. That gets you two 60 Watt Amplifier module kits. With the PAT-4PWR kit, the hum is finally gone". endstream
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SCA80 Replacement for C11 Installation and Assembly Manual, Rev B, all product shipped after about Feb 1, 2017. uuid:240f7d64-6203-4457-8004-e2040a84a741 The scans are in color, and the 16 page
Our engineering team is available to assist with your designs. 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! It's right here in the store. PAT4 Better Balance Control Replacement Manual. bypass of the tone controls.
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OF,#\KfZIV@7Nmbkn The improved version is called Rev B. that you want: You can bring your Dynaco Stereo 120 Power Amplifier back to life. Pick just the parts you need at the Updatemydynaco Store to bring your Dynaco Stereo 120 Power Amplifier back dynaco dynakit What tools do I need? The manual specifically instructed to do high power high frequency tests quickly 
