The service manual functions as a repair guide for troubleshooting and sometimes contains tips for refurbishing and. Hans has kindly agreed to make the pcb layout gerber files available for interested readers. This site helps you to save the earth from electronic waste. Acrosound ultralinear ii amplifier schematic needed please wpod. Dynaco stereo 35 tube amplifier for sale us audio mart. Someone returning to this site will remember an article on the comparison between an ultra linear and conventional pentode connection. Nice acrosound 2020 tube amplifier ultralinear power tube amp nice rare and very desirable acrosound 2020 stereo amplifier featuring mullard el84 outputs i have enjoyed this amp for years features the famous and great sounding acrosound transformers some of the best ever used in tube amps very nice true sweet vintage tube tone from this classics cosmetically it is in nice shape a few. Now its a simple fact that pentodes, left to their own devices, are not very linear. Sep 23, 2019 i am also rebuilding a pair of ultra linear ii amps. The biggest collection of acrosound manuals and schematics. Ultralinear is a method of using the output transformer as a very local feedback loop to linearize the output section.
This brings together the basic advan unlikely that the builder be alle to. Another question, is the output transformer on this amp to350. A total voltage rating of 600v instead of the 1kv and 700v listed should be sufficient. Acrosound manuals, schematics and brochures hifi manuals. To purchase ultralinear transformers spares or accessories, please contact the company via their website or visit an authorised retailer. Full text of audio magazine june 1956 internet archive. Also, the link that ive posted is for an acrosound ax7au7 pp 6550, is this similar to the ultralinear ii.
Acrosound ultra linear circuits top quality transformers make any circuit better. The box symbol indicates nothing but i use it for the day job and some schematics that i produced for this site using my schematic and analysis software. One of the fruits of the program was development of the ultralinear output stage which constitutes a basic advance in the audio art. Post comments atom just a place to post some of the hifi information i have collected over the years. Acrosound ultra linear sch service manual download. Free acrosound diagrams, schematics, service manuals. Just a place to post some of the hifi information i have collected over the years. Many would be surprised to learn that the 200watt marshall model 1967 head was an ultralinear power amp. Select picture or schematic to display from thumbnails on the right and click for download. Service manuals, schematics, eproms for electrical technicians. Acrosound ultralinear output transformers amplifier schematics 1954. Furthermore, the ultra linear ul622iwl are simple to place and setup, with their functional design, so you can use your new system immediately for highquality audio enjoyment. Ultra linear 61,6 circuit using to30 transformer page 9 ultra linear circuitry achieved its popularity with the 61. Acrosound ultralinear ii vacuum tube monobloc amplifier in very good condition, especially in light of its 50 plus years in service.
Top kodi archive and support file community software vintage software apk msdos cdrom software cdrom software library. Acrosound ultralinear ii mono tube amplifier amp ulii. For model ultralinear ul ii 2, acrosound, philadelphia. Ive been doing a lot of study about linearphase versus minimumphase equalization. One of the fruits of the program was development of. Ultra linear is a special case of distributed loading. One of the fruits of the program was development of the ultra linear. Save ultra linear speakers to get email alerts and updates on your ebay feed. This page contains links to some valve audio amplifier and other schematic circuit diagrams for free download. Acrosound transformer info and amplifier schematics pdf. Acrosound ultralinear output transformers amplifier schematics. Customer repair drawing supplied with repaired amp all part of the service.
This website is not affiliated with or sponsored by acrosound. Acrosound ultralinear ii amplifier schematic needed please. These changes appear in red so you wont have to read through the entire text searching for them. Used acrosound 2020 tube amplifier ultralinear tube amp. Mit ultra linear reference ii model mh 770 15 foot pair single bi wire. However, the best results come from the use of the finest quality in all parts of the system, and it is desir. Hello and thanks for initial answers here is the photo, after using for two days the loudspeakers i have to say that they sound quite good for me with good bass with 15 woofer. Nov 08, 2009 acrosound ultralinear ii amplifier schematic needed please posted by wpod a on november 8, 2009 at 17. Acrosound, philadelphia from preamplifier s1001 to ultral. This is model 75, and features a versatile acro output, better known as acrosound ultralinear output transformer acro produced some of the nicest transformers of the era in nearby philadelphia.
Unfollow ultra linear speakers to stop getting updates on your ebay feed. The device is self contained with all matching and bias circuitry included. Solar audio speakers ultralinear disco monitor 265. Acrosound ultralinear ii help audiokarma home audio. The circuit is a masterpiece in simplicity and audio engineering. Acrosound ultralinear transformers manual product guide. Dec 28, 2010 if the amp is ultra linear then its not the kind of amp trelja was referring to. Is the adjective ultra linear exclusively associated with highfidelity amplifiers. N tube types and circuit variants have been uncovered which. In the schematic above i have stripped the amplifier of the entire preamplifier. Acrosound, philadelphia from preamplifier s1001 to ultra linear ii, united states of america usa, 53 pictures, 16 schematics, 27 tubes, radio catalog. I wanted to really understand the differences and possible advantagesdisadvantages one may have over the other in particular situations. High quality 10 watt ultralinear amplifier l f sinfield. Acrosound ultralinear ii amplifier schematic needed please posted by wpod a on november 8, 2009 at 17.
Acrosound ultralinear circuits top quality transformers make any circuit better. Ultra linear 12 200 watt 4ohm dvc subwoofer buy one get one free. The gec 1957 williamson triode amplifier using kt66s had a total of 16 uf for the plate supply. To purchase ultra linear transformers spares or accessories, please contact the company via their website or visit an authorised retailer. If my tastes were in hard driving music like rock, i might like the muscle and drive of the ultra linear. Software sites tucows software library shareware cdroms software capsules compilation cdrom images zx spectrum doom level cd. The owners manual is used as an reference guide, instruction manual and instruction book.
These are nice quality ultra linear ul622iwl in wall ceiling speakers 180 watts. So you usually have to do something as they wont otherwise be hifi. Pl83 6bq5 equivalent singleended ultra linear stereo power amplifier. Pl83 6bq5 equivalent singleended ultralinear stereo power. I have studied the circuit and it is the exact ultralinear circuit, but. Nov 07, 2012 home stereo and general audio discussion forums. Acrosound ultra linear ii amplifier service manual 2 photo copy. Ultra linear ads alpine audiobahn audiovox bazooka cascade cdt audio clarion crunch crystal delphi skifi directed audio dynamat emerson farenheit. Ultra linear leaves me with the impression of sitting much further back in the performance, while triode brings me in closer and gives me a better sense of where the instruments are on stage. Does anyone have any information, schematics, technical data, etc, beyond what is stated below about it the acrosound stereo 120 is a dual amp on one chassis using a common power transformer, sort of like stu hegemans 1961 harmon kardon citation ii, but. Ultraclean atmospheric ii designed to meet iso 14644 class 5 cleanroom applications. In order to navigate out of this carousel please use your heading shortcut key to navigate to the next or previous heading.
Acrosound ultra linear ii amplifier assembly diagram for serial no. Amplifiers australian amateur radio dealer, rf solutions. The original hafler and keroes 1951 acrosound ultra linear amplifier had a total of 80 uf for the plate supply. Also i am replaceing the 12w carbon resistors with metal film.
Ultra linear ii amplmixer acrosound, philadelphia, build 1959, pictures, 7 schematics, 5 tubes, united states of america, semiconductors, audio. Where possible i redraw schematics in the original style and layout so there may be a few inaccuracies please let me know and i will correct them where components are concerned i generally use common symbols for basic parts i. Acrosound ultra linear ii amplifier assembly diagram for. Page 2 waves created the linmb to answer to the most demanding and critical requirements when mastering any sound and genre of music. While the waves masters bundle is focused to provide purist quality tools for mastering. But, the only two i can say with certainty are the legendary quad ii, introduced in the 1950sreissued in the past decade, and the audio. The following is a list of valve and some classic transistor equipment schematic diagrams and some service information to.
History tells us that from the three choices of tetrode, triode or ultralinear configuration, the latter was the preferred configuration for 1950s to 1960s hifi, because it offered the tonal sound of triodes, substantially lower distortion particularly intermodulation distortion with power approximating tetrodes, at a cost comparable with. First im interested in the acrosound stereo 120 tube amp. These systems are ideal for cleanrooms air showers and pharmaceutical applications. Linear audio vol 12 contains an article by hans polak on the design of a nonplus ultra phono preamp. Acoustic g80t g100t schematic acrosound ultra linear output transformers schematic action electronics ctv310l schematic ada rocket ra10 ra20 schematic adi ar146 446 schematic adi at201 schematic admiral ad20md21 schematic advent 400 schematic advent m300 schematic aeg geadur605wlk schematic aeg lavamat 511 schematic aeg lavamat 610 schematic. This amp has the commercialized version of one of acros largest 6550 output transformers strongly resembling the to 330. The term ultralinear is also called distributed load amplifier wherein the sceen 2 of the tube is dc biased from each half of the primary such that the tap point is 43% of the turns ratio or 18. An example of that is the citation 2 made by harmon kardon.
The maximum achievable output voltage swing using a conventional classab amplifier is. Hans has kindly agreed to make the pcb layout gerber files available for interested readers update. Acrosound, philadelphia from preamplifier s1001 to ultra l. Metal film resistors are typicallt rated at 300 vols max 500 vols. Acrosound, philadelphia from preamplifier s1001 to ultralinear ii, united states of america usa, 53 pictures, 16 schematics, 27 tubes, radio catalog. After putting the amplifier into operation i found a few changes were necessary to the power supply. Used acrosound 2020 tube amplifier ultralinear tube. I am also rebuilding a pair of ultra linear ii amps. The tube cage is present and included in the sale, but i dont believe that i ever had the bottom plate. Usually retro somtimes vintage sometimes modern but always hifi.
A 180vpp integrated linear amplifier for ultrasonic. However, the best results come from the use of the finest quality in all parts of the system, and it is desir able to use quality circuits and quality transformers together. These are what a manufacturer calls post production changes. First described in audio engineering, november, 1951 the cricuit is still among the finest available. Nice acrosound 2020 tube amplifier ultra linear power tube amp nice rare and very desirable acrosound 2020 stereo amplifier featuring mullard el84 outputs i have enjoyed this amp for years features the famous and great sounding acrosound transformers some of the best ever used in tube amps very nice true sweet vintage tube tone from this classics cosmetically it is in nice shape a few small. Acrosound diagrams, schematics and service manuals download for free. Ultralinear ii amplmixer acrosound, philadelphia, build 1959, pictures, 7 schematics, 5 tubes, united states of america, semiconductors, audio. What are the tonal differences between these two modes of operation.
The original hafler and keroes 1951 acrosound ultralinear amplifier had a total of 80 uf for the plate supply. Although popular with tube amplifier manufacturers because of the higher power output it yields, ultralinear mode does not command a large avid following the way that triodes do. Page 1 waves linearphase multiband software audio processor users guide waves linmb software guide page 1 of 28. Typical applications for this device include driver stages for single channel and multicarrier feed forward linear amplifiers. The capactiors in the power supply may be made up by hooking lower voltage capacitors in series, the bypassing each with a 200k or 220k 2 watt resistor. Ultralinear electronic circuits are those used to couple a tetrode or pentode vacuumtube also called electronvalve to a load e. Marantz 8c schematic marantz cd65 mk ii schematics marantz hifi amp schematic. Below you will found our manuals on the phase linear 400. Kodi archive and support file community software vintage software apk msdos cdrom software cdrom software library console living room software sites tucows software library shareware cdroms software capsules compilation cdrom images zx spectrum doom level cd.
But then how many of us have heard a singleended, directly heated pentode e. Acoustic g80t g100t schematic acrosound ultralinear output transformers schematic. Treated foam surround dome dust cap nonpressed paper cone rubber magnet cover single 4 ohm voice. We help you to save time and money by finding your needed schematics. The technology used for this linear amplifier contains hv devices that have a drainsource junction breakdown voltage v ds, max of 120 v and a gateoxide breakdown voltage v gs, max of 18 v, and it contains mediumvoltage devices with a v ds, max of 50 v and a v gs, max of 5 v. Pl83 6bq5 equivalent singleended ultralinear stereo. For a list of authorised retailers please contact the company via their website. The 200k 2 watt resistor shown should actually be a 4 or 5 watt.
It turns out that results of that test were comparable with these two monoblock amplifiers. With regard to ht current drawn and power output, this. Acrosound ultralinear ii help audiokarma home audio stereo. Ultralinear is a special case of distributed loading. Download the phase linear 400 manuals for free hifi manuals.
This is model 75, and features a versatile acro output, better known as acrosound ultra linear output transformer acro produced some of the nicest transformers of the era in nearby philadelphia. This amplifier was featured on the february 2004 issue of the highfidelity audio. From the quad ii handbook redrawn in the original style. Linear phase eq vs minimum phase eq pro audio files. Pl83 6bq5 equivalent singleended ultralinear stereo power amplifier.
Ultra linear ii 2 power amplifier assembly diagram for serial no. Ultra linear electronic circuits are those used to couple a tetrode or pentode vacuumtube also called electronvalve to a load e. Ultra analog va3 is an analog synthesizer plugin that captures the sound of vintage and modern classics in vst2, vst3, audio units au, and aax formats for reason, live, logic pro, pro tools, cubase, reaper, cakewalk, sonar, fl studio, and many more. Gianfranco scasciafratti, i0zy, and has been developing electronic products with high technological content for the telecommunications industry since then. Ultralinear ii amplmixer acrosound, philadelphia, build 19.
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