radiomuseum.org

Solid State Stereo Amplifier SA-800

Solid State Stereo Amplifier SA-800; Monacor, Bremen (ID = 1207581) Verst/Mix
 
Solid State Stereo Amplifier SA-800; Monacor, Bremen (ID = 1207584) Verst/Mix
 
Solid State Stereo Amplifier SA-800; Monacor, Bremen (ID = 1207586) Verst/Mix
 
Solid State Stereo Amplifier SA-800; Monacor, Bremen (ID = 1207588) Verst/Mix
 
Solid State Stereo Amplifier SA-800; Monacor, Bremen (ID = 1207590) Verst/Mix
 
Solid State Stereo Amplifier SA-800; Monacor, Bremen (ID = 1207592) Verst/Mix
 
Solid State Stereo Amplifier SA-800; Monacor, Bremen (ID = 1207593) Verst/Mix
Solid State Stereo Amplifier SA-800; Monacor, Bremen (ID = 111364) Verst/Mix Solid State Stereo Amplifier SA-800; Monacor, Bremen (ID = 111365) Verst/Mix
Solid State Stereo Amplifier SA-800; Monacor, Bremen (ID = 111366) Verst/Mix Solid State Stereo Amplifier SA-800; Monacor, Bremen (ID = 1790717) Verst/Mix
Solid State Stereo Amplifier SA-800; Monacor, Bremen (ID = 1790719) Verst/Mix Solid State Stereo Amplifier SA-800; Monacor, Bremen (ID = 1795291) Verst/Mix
Solid State Stereo Amplifier SA-800; Monacor, Bremen (ID = 1795292) Verst/Mix
Für mehr: roten Scrollbalken bedienen.
Solid State Stereo Amplifier SA-800; Monacor, Bremen (ID = 111364) Verst/Mix
Monacor, Bremen: Solid State Stereo Amplifier SA-800 [Verst/Mix] ID = 111364 933x538
Wählen Sie rechts durch klick. Mitglieder klicken für Download in gross.
Für Modell Solid State Stereo Amplifier SA-800, Monacor, Bremen
 
Land:  Deutschland / Germany
Hersteller / Marke:  Monacor, Bremen
Jahr: 1973–1977 ?? Kategorie: NF-(Niederfrequenz-) Verstärker oder -Mixer
Halbleiter (Zählung nur für Transistoren) 25: 2SC1000 2SC1000 2SC1000 2SC1000 2SC732 2SC732 2SC732 2SC732 2SC732 2SA842 2SA842 2SA842 2SA842 2SC1626 2SC1626 2SC1626 2SC1626 2SC733 2SC733 2SA816 2SA816 2SD425 2SD425 2SD425 2SD425 TA7122 TA7122 TA7120P
Hauptprinzip NF-Verstärkung
Wellenbereiche - ohne
Spezialitäten
Betriebsart / Volt Wechselstromspeisung / 110; 117; 220; 240 Volt
Lautsprecher - Dieses Modell benötigt externe(n) Lautsprecher.
Belastbarkeit / Leistung 120 W (sinus/unverzerrt)
von Radiomuseum.org Modell: Solid State Stereo Amplifier SA-800 - Monacor, Bremen
Material Metallausführung
Form Regalgerät wie HiFi-Komponente für Bücherwand.
Abmessungen (BHT) 410 x 135 x 300 mm / 16.1 x 5.3 x 11.8 inch
Bemerkung

Anschlüsse: 2× Aux, Tuner, 2× Phono, Tape, Pre out, Main in, Mono out. Betrieb von 4 LS. Metallgehäuse mit seitlichen Holzblenden.
Made in Japan.

Musikleistung 2x 90W, Dauerleistung sinus: 2x 60W / 4Ω, 2x 50W / 8Ω
Klirrfaktor <0,4%, Frequenzbereich: 10 Hz - 50 kHz

Neupreis 1977 im RIM-electronic Katalog: 560 DM

Made in Japan

Nettogewicht 10 kg / 22 lb 0.4 oz (22.026 lb)
Originalpreis 489.00 DM
Datenherkunft Radiokatalog Band 2, Ernst Erb
Literatur/Schema (1) Funkschau (Heft 20, 28.September 1973, Seite 2382)
Literatur/Schema (2) RIM-electronic '77

Modellseite von Peter Böhm angelegt. Siehe bei "Änderungsvorschlag" für weitere Mitarbeit.



Alle gelisteten Radios usw. von Monacor, Bremen
Hier finden Sie 157 Modelle, davon 151 mit Bildern und 97 mit Schaltbildern.



 


Forumsbeiträge zum Modell
Monacor, Bremen: Solid State Stereo Amplifier SA-800
Threads: 1 | Posts: 2
Klicks: 1309     Antworten: 1
monacor: SA-800; Solid State Stereo Amplifier
Joel Hill
17.Feb.15
  1

Hi

I want to resolve an issue with this amplifer.

 

The units design doesnt disconnect the speaker terminals from the internals when you switch it off so basically when you power it down it just gets quieter before crackling into silence. then the load drops and it comes back for 1 second of quiet sound before completely going off.

 

im wondering without changing the unit to switch the speaker outputs when power is off. is there any simple cheats to getting it quiet. other than putting a load on the capacitors to draw them down fast.

 

great to be here on RM with my first post

 

 

 

Stan Roberts
20.Feb.15
  2

Hi Joel.

I have two suggestions, the second being the safer and far more elegant solution, which is what I would recommend. 

  1. If you’re looking for a ‘simple cheat’ without modifications to the amplifier, as you say, you could try using a small mains transformer with a low voltage output winding to hold a couple of relay contacts closed, those contacts being in series with each speaker line.  The primary of the transformer would be connected to the switched output socket at the back of the amplifier.  When the amplifier is switched ON, the contacts would close immediately enabling the speakers to be connected to the outputs of each amplifier channel.  The difficulty comes when switching OFF since you need a fast release of the contacts to disconnect the speakers in order to silence all the spurious thumps and clicks which follow.  For this reason, it would be prudent to energize the relay coils using a.c. from the low voltage transformer secondary since there would be no appreciable stored charge as there would be when using a d.c. circuit with smoothing capacitor.  The low voltage transformer would also provide the creepage and clearance distances required for electrical safety when using this approach.
  2. Recommended approach.  Your fellow compatriot, Rod Elliott, is a veritable authority on audio/hi-fi design in all its aspects and I hold him in high esteem.  I’ve used his design for Loudspeaker Protection and Muting and found it to be simple, effective and reliable.  This is the better course to take since the schematic for the Monacor amplifier suggests that no protection is provided for the loudspeakers should the ‘amplified diode’ bias transistor or one of the power transistors fail.  More modern amplifier designs usually take this into consideration and provide such protection since speakers often cost more than the amplifiers that drive them.  Looking at photographs of the amplifier, Rod’s circuitry would likely fit inside quite easily with minimal modifications to the amplifier, but you could construct it as a separate item.

For those members interested in audio design, Rod’s pages at Elliott Sound Products are well worth a look.  

 
Monacor, Bremen: Solid State Stereo Amplifier SA-800
Ende Forumsbeiträge zum Modell

  
rmXorg