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1st May 2010, 11:07 AM
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#3 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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Now I understand, why it is very hard to find the realy first solid state amps equipped with germanium/silicon power devices; most of the brands in the United Sates uses only power output transistors with their own factory number like Motorola's power device 132-070 for McIntosh e. g. = Industry standart 2N5303
An other curious thing is the fact, that the US amp devices for the German marked was equipped with tubes/valves; I have study the follow German overviews found by follow URL: hifimuseum.de - Sie sind im Bereich : Hifi Jahrbücher 1) HiFi-Jahrbuch 1963/1964 (first edition in general) HiFi Jahrbuch 1 Verstärker after first release of germanium power devices even 8 years later no solid state amplifier mentioned 2) HiFi-Jahrbuch 2 1965/1966 Verstärker I note first amount of solid state amplifiers, but mostly tube-based - at least by the output power devices 3) HiFi-Jahrbuch 3 1967/1968 HiFi-Jahrbuch 3 Verstärker wider range of solid state amplifiers, but still a large amount of tube/valve equipped versions But the first transistors from USA was released more than 10 years ago. Where are this commercial amp inside this first generation of power devices? The first interesting tuner/integr.amp set up from the sixties is follow (schematic not to find and therefore wanted !!!) : Acoustech INC, Cambridge, Massachusetts, Silicon solid state 1965 Acoustech VIII (Receiver with small power amp section 2x3V, >1W/8 ohms) It should be a stereo tuner with normal line buffer, but instead of this an real power amplifier is on board for mid levels at high efficiency loudspeakers. Acoustech VII (Integrated Amplifier 2x20W/8 ohms) in the attachements some pics and a URL collection arround it: http://telefunken.te.funpic.de/jahrb.../Acoustech.jpg Acoustech Stereo Amplifying System? - AudioKarma.org Home Audio Stereo Discussion Forums ACOUSTECH VII A. A. Janszen autobiographical sketch, frame content http://telefunken.te.funpic.de/jahrb...ech%20VIII.jpg http://www.bostonaudiosociety.org/pd...04-05-7602.pdf Last edited by tiefbassuebertr; 1st May 2010 at 11:24 AM. |
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1st May 2010, 11:16 AM
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#4 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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Acoustech VII / VIII more pics
Acoustech VII / VIII more pics
Last edited by tiefbassuebertr; 1st May 2010 at 11:27 AM. |
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1st May 2010, 12:23 PM
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#5 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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Lansing's Term for SS Power Amp: "Solid State Energizer Transducer"
Here another interesting power amp uses germanium output power devices:
SE400/SE401 from the Brand "James B Lansing Inc" (JBL) introduced 1964. Some links an attachements, but no schematic online: JBL ƒXƒeƒŒƒIƒpƒ[ƒAƒ“ƒvSE400S‚ÌŽd—l Jbl C44 Paragons Info Please Please - Page 3 - AudioKarma.org Home Audio Stereo Discussion Forums Power amp output - BJT or MosFET? (post #3) audi1356??? - Looser?s Waltz?????????????? ???????? McIntosh/JBL/audio-technica/Jeff Rowland/Accuphase/?/?¾????? ???????? McIntosh/JBL/audio-technica/Jeff Rowland/Accuphase/?/?¾????? Diary(11/2005) Review "Transistorized 15 W LANSING amplifier SE 400" about JSTOR: An Error Occurred Setting Your User Cookie no longer online. Who knows this article? Last edited by tiefbassuebertr; 1st May 2010 at 12:52 PM. |
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1st May 2010, 12:27 PM
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#6 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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JBL's "Solid State Energizer Transducer"
JBL's "Solid State Energizer Transducer" more pics
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1st May 2010, 08:33 PM
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#7 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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More of the first solid state amp models:
Bogen AT-600 see attachement - nothing informations online. Currently webaddress: Bogen Communications: Speakers, Amplifiers, Audio Applications Hede Nielsen Fabriker AS DK 1) "HFN 212" see attachement - nothing informations online 2) "Arena 9000" HIFI4ALL.DK Forum: ARENA T9000 HIFI4ALL.DK Forum: ARENA T9000 Lesa SPA HF850 6xAL102 ATES (now ST) Made in Milano (no photos online) http://digilander.libero.it/Magnaghi...iche%20Spa.htm http://digidownload.libero.it/Magnag...nuali_Lesa.pdf (Service Manual) http://telefunken.te.funpic.de/jahrb...Lesa_HF850.jpg short form data Radford SC4-10 - see attachement - nothing informations online. Concertone 200, 200S - see attachement - only rare advices and no photo online http://telefunken.te.funpic.de/jahrb...tone%20200.jpg Synthèse Haute-Fidélité • Afficher le sujet - Nac-nap21 Scott 260/260B Audion Circuit Review http://wegavision.pytalhost.com/jahr.../Scott_260.jpg Saba-Telewatt_TS100 http://telefunken.te.funpic.de/jahrb...watt_TS100.jpg |
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1st May 2010, 08:36 PM
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#8 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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Scott 260/260B
Audion Circuit Review http://wegavision.pytalhost.com/jahr.../Scott_260.jpg Saba-Telewatt_TS100 SP2213 inside http://telefunken.te.funpic.de/jahrb...watt_TS100.jpg Armstrong 500 Series AL102 inside The Armstrong 421 Amplifier Armstrong Audio - Wikipedia, the free encyclopedia The Armstrong 500 Series The Armstrong 400 Series - Page 2 http://www.saturn-sound.com/images%2...20nov%2069.jpg http://www.saturn-sound.com/images%2...20sep%2069.jpg Sugden SI402 and A21 BD131 (silicon) inside Jim Sugden and the Si 402 40 Years Ago Today History Neophonics Last edited by tiefbassuebertr; 1st May 2010 at 08:59 PM. |
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2nd May 2010, 10:06 AM
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#9 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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The URLs from Scott 260/260B
http_wegavision.pytalhost.com/jahr.../Scott_260.jpg and Saba-Telewatt_TS100 SP2213 inside http_telefunken.te.funpic.de/jahrb...watt_TS100.jpg was both short-live sites and therefore the upload of this jpg-files. By one front of the - on first look identical - amps from Saba-Telewatt you will find already the K+H logo from the brand "Klein & Hummel" (now Sennheiser), good known in Germany through their famous Stereo-FM Tuner "FM-2002" developed from Mr. Reinhard Wieschhoff-van Rijn Last edited by tiefbassuebertr; 2nd May 2010 at 10:14 AM. |
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2nd May 2010, 02:53 PM
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#10 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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In 1957, Vega introduced the world’s first solid state amplifier, rated at 125 RMS
...I read about
vintage amp amplifier, effects dating, serial numbers, CMI, Carlsbro, Cruise Audio The model-No include the cabinet for the loudspeaker is "ER-123" (ER123) I dont find any informations about the schematic and photos about the internal construction. Who knows more ?? |
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