Field Coil Speakers
|The history of the speakers began in 1874, when the German engineer Ernst Werner von Siemens (founder of the company Siemens) described the design, consisting of a circular coil T positioned in the magnetic field. Vertical movement of the voice coil was now possible due to the special mount. Ernst von Siemens has pointed out that the device can be used for audio playback. A little later Siemens filed two patents, which actually described the loudspeaker design. After a number of enhancements to approximately in 20-s of the last century, speaker based on dynamic cones has acquired the type of, which has little changed to the present day.
The vast majority of speakers,issued prior to the Second World War,have the so-called field winding coil T field coil.Because the powerful permanent magnets with stable properties do in that time have not yet learned,much cheaper and more effectively use the solenoid,i.e. coil T dressed to punch the magnetic system and connected to a source of constant voltage.The speakers on the подмагничивании (magnetization) continued to be produced in the 30s, 40s and even in the 50s. Many known firms,such as клангфилм (Klangfilm), Siemens, телефункен (TeleFunken), Western Electric, SAR produced speakers with solenoids,considered so far непревозойденными (unsurpassed) on accentual constituents and expressiveness and sound facing enormous money at the auctions.
Today the solenoid seems anachronistic,but in the world there has been a steady growth of interest to such design speaker.There are individual wizard and even firms,issuing speakers at подмагничивании (magnetization) or downgrade the подмагничивание (magnetization) electrodynamics speakers from other manufacturers.
Whether there is in all these games the rational grain or a regular audio fashion,such biggest однотактниками?I think,the solenoid has only one advantage:It allows you to adjust the tension of the magnetic field in the clearance of the inductions in the dynamics of t and thereby make a “fine” adjustment of the speaker on the dial tone of the balance and the quality of the playback bass.Electrodynamics speakers such opportunity not.In the rest of the solenoid is less convenient,when poor filtration pulsations from the bias in the speakers may be monitored von ac,to the same experience in the use of and the establishment of such speakers the,that the quality of the materials,from which manufactured magnetic body and the solenoid coil T is of crucial importance for the sound speaker.For example,painting and “transparency” wire,which wound Field Winding Coil t hear well,as audible and the properties of the wires in the windings of the output of the transformer!As well as the power supply Field Winding Coil and all of its components(straightener,power transformer T capacitors,connecting wires)affect the sound Even stronger than the same elements in the power supply of the power amplifier!These facts do not fall within the framework of modern physics and their courage can be attributed to the as abnormal phenomena in the audio,though would be because,that when large enough capacity of the filter capacitor and inductance подмагшничивания magnetic coil in the circuit field winding no useful signal or he has no discernable small level,while the audibility of elements of the power supply circuit bias above,than in the signal connections of the mind. Experimentation with подмагничиванием, I collected several tens of power supply units for the most different speakers.
The starting point for my experiments have served as the recommendations of the Anatoly Markovic Лихнцкого,known engineer and the author of a number of conceptual articles on audio:
Anatoly Marković began to use the speakers on the подмагничивание still in the early 60s of the last century,and now… lane mono speaker,in which the main range plays 15 inch woofer клангфилм 44022 on подмагничивании,as well as above 5 khz is 4 inch field coil preforming Siemens, 1938 release of.
As to find in the Internet the texts of Anatoly Markovic on and ecotoxicity подмагничиванием затрудинтельно(they are placed in a closed forum and are not поисковиками),I cite a few of the most excerpts from his communications,saved on my computer:
It is the power source for speakers with подмагничиванием! The fact that the sources of power supply engines электропроигрывателей and others would seem not related electrically or MRI with path play known relatively long .The power source field winding affect the sound quality of the Speaker The same was aware ,but no who have not explored the extent to which the .Truth Anton Степичев recently requested to draw my attention to the power source field winding coil. Since the last time I was in the main столярными works, as the missed the point of Anton past the ears,and connected the speakers Klang and Siemens directly to the network through the diode bridge CC405 and parallel condenser Tesla 300 690091. The sound was remarkable,as the immediately and the question of the source of the does not become topical .But once the diode bridge flew at the time of engagement. .I put another -there has been the same and I decided to do кенотронный straightener with power transformer and U-filter.. The elements I put in it is not the best( the old Soviet). I понадеялся that their influence will not so strong as in мощнике and mistaken. When you first turn on me literally question always consulted vulgarity sound. .The feeling ,that assembled previously only on телековских detail assistant and the source for the field winding announced to each other the second world war. Listen to music on the system was not possible. What is the hysteria ,Full distortion and Who now decides what is legitimate emotions.naturally,such was simply unacceptable! And I have decided to address the source of the thoroughly. Incidentally I found that when the source of the residual magnetization dynamics continued sound,truth quietly ,but the main they were perfectly,and at all levels of experience. Then there is the opportunity to assess the specifically гадит power source field winding there is a benchmark for comparing the . Further work has begun : Двухполупериодное straightening was replaced by однополупериодное- was received by the marked improvement in the( clean sound) electrolyte in the filter changed several times and the Soviet Union and on the Samsung and the Tesla and at the end of the ends of the inform us Gate. Выйграл inform us Gate . Each lines I replaced the телековский and correctly сориентировал on Anton Степичеву . The sound quality it is important that such logic apace . He graduated from the i selection кенотронов 5u3 with . The choice of focus from the Soviet 50 and 70 and Сильвании ( 60). With a sabbatical выйграли кенотроны 5u3 with 50 and although the sound disappeared совковая finesse ,but what the sharpness and грубоватость especially at being discussed at the remained .me it is not unnatural and I returned to the безтрансформаторному inclusion through the diode semiconductor Bridge, by entering a small катушечку телековского wires before plus the electrolyte that bridges longer not fly. So,won the semiconductor bridge .from which, ask you ? The shortest path signal! What can be done conclusions? Experiment with wires, кенами, transformers and throttles the best on the power supply for the field winding. In the first safe -no which will not burn down the sound path. The second on the sensitivity to all replacements elements and changing directions harness the source field winding does not concede to the output stage мощника. The third is the standard sound with disabled подмагничиванием……………………………………………………………………….
I was joined and continued experiments with подмагничиванием.
Finally I realized Single-ended безтрансформаторный source to Klangfilm,on the upmarket to Ебее кенотроне RGN 4004 and compared it with безтрансформаторным мостиковым rectifier.
I Всеж I decided to compare RGN 4004 c ordinary silicon cells diode in the подмгничивании.Result expected ,but as the palm.
In addressing the issue I одновтеменно decided and several world.
My final version :
Summarizing the experience of Anatoly Markovic,the basic principle of the power supply field winding coil can be formulated so:maximum ease the power supply unit and the minimum number of parts of the high audio quality.And now proceed to the practical part.
All the speakers on the подмагничивании conditionally can be divided into three groups:
1.ht,with a voltage excitation 200-300and a current consumption up to 100ma,to this group include almost all speakers at подмагничивании (magnetisation),issued firm клангфилм (Klangfilm) for professional asked.The most known among them this woofer 44022 and 42006 широкополосник (broadband).The Instrumentation speakers also include many American loudspeakers Jensen,Magnavox,AW,installed in radios,console радиолы (radios),электроорганы (electric organs) and amps.
For such speakers better power diagram is a direct connection to the rectifier network,without intermediate transformer.Even the best transformer a feeling of pollution of the sound and reduce clarity.Rectifier element кенотрон,it must be so good,how much you can afford to.Однополупериодное straightening,накальный transformer and high quality of the condenser,defines not only the level of pulsation,but and voltage on the coil to the field winding.It is desirable to use бумаго-Oil capacitors,by selecting the typical and type by отслушивания.
2.the speakers with the voltage of the excitation in 70-150,i.e. much less than can be obtained when the ОППВ straightening voltage network,with shock consumption up to 100ma,very rarely to 150MA(speakers from the famous телефункеновских dual-band radios higher class of 7001 and 8001 consume current 160ma).
To this group is most European speakers,installed in incandescent radios and console.For example,virtually all of the “household” speakers Siemens concern(Siemens,ON,телефункен) are the supply voltage from 70 to 100i experienced by me was determined that the best result is achieved when the power of such speakers from the autotransformer group.as such can be used enjoy Internet access equipment seized from the computers radios.Most European defendants are the primary (network)coil breakouts,to connect to the network 110,120,150,220,240I first two outlet повзоляют breed of improvised the autotransformer group the majority of speakers телефункен with voltage excitation 70-100i currents of consumption is usually small and permit the use of кенотронов.for currents up to 100ma you can recommend одноанодные кенотроны RGN1404,1832 philips,dario,G1404 valvo.for currents up to 150ma and above would be required more powerful rectifiers,type RGN2004,RGN2504,AZ12 mesh,AZ50,AX50 for power supply units extreme quality you can apply the most powerful and expensive European кенотрон RGN4004 telefunken t he same KL77305 klangfilm as well as his version:вальвовский G4004 and филипсовский 1817.
3.the speakers with the voltage of the excitation from 7 to swimming pool and the shock to 1amps.to this group are very rare driver and delivering the Western Electric,as well as some of the Speakers КИНАП,for example inv driver 1A13 and басовики 2A8,with the solenoid 20in/1A.among European speakers low clothes extremely rarely,of the most common is the 4-inch several Precision Power PSC221 phase Siemens and телефункен on подмагничивании(30in/100ma and 45in/70ma)
For such speakers will inevitably use the gear reducer loading capacity -.As a rectifier element in low-voltage TBT are best enjoy Internet access daylight lamps are developed washers,the second place enjoy Internet access amplifiers power diodes type D305.Selenium you can include in the однополупериоде,if necessary, connecting washers sequentially(reverse voltage selenium does not exceed 20A).When current consumption of the order of a few amps for smoothing the pulsation needed capacitors quite a large capacity,hundreds микрофарад,therefore will inevitably have to use high-electrolytes audio quality,for example surveying,Siemens,in the last resort BG or the modern аудиофильское.
Separately worth mentioning this impasse has direction in the establishment of power supply units for the speakers on the подмагничивании,as sources of current and stabilizers on powerful lamps and transistor.Creation experienced it on the best components showed that the natural sound when different measurement methods it is very severely affected,as well as the clarity decreases significantly.For additional costs to the lamp and the capacitors absolutely not justified.The only task,which has successfully resolved using such TBT,this achievement of the high stability of the current field winding.However, side effect,the sharp deterioration of the sound,outweighs all the advantages of the stabilization of the regime.
Article from the Journal of Space weather 20-s,in which it is proposed the minimalist way to power your speakers!
Photos below blocks field winding,which I collected over the past few years
For the new power supply units had fabricated special “Shamanic Development” socket.In the Square area of the red wood высверил holes and insert the loop wire телефункеновского,relying on directions,all connections with the now we have already customized our working environment and twist together.
Daylight lamps are developed power supply units for Siemens твиттеров on подмагничивании,1939, Release