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| | __NOTOC__ | | __NOTOC__ |
| − | == Data == | + | == Daten == |
| − | {{navigation}} | + | {{Navigation}} |
| − | '''General''' | + | '''Allgemein''' |
| − | * Manufacturer: [[Kücke]] | + | * Hersteller: [[Kücke]] |
| − | * Model: KS E42 | + | * Modell: KS E42 |
| − | * Year of manufacture: 80s | + | * Baujahre: 80er Jahre |
| − | * Made in: West Germany | + | * Hergestellt in: West Germany |
| − | * Color: | + | * Farbe: |
| − | ** Front: chanpage (brown button); gold, chrome, black (black button). | + | ** Front: Champage (braune Taste); Gold, Chrom, Schwarz (schwarze Taste) |
| − | **Case: Brown for front: chanpage; Black for front: gold, chrome, black | + | **Gehäuse: Braun bei Front: chanpage; Schwarz bei Front: gold, chrom, schwarz |
| − | * Type: (Mono/Stereo) (Analog) | + | * Typ: (Mono/Stereo) (Analog) |
| − | * Remote control: yes via KS V32 + system control cable: BOX1, BOX2, On/Off | + | * Fernbedienung: ja über KS V32 + Systemsteuerkabel: BOX1, BOX2, On/Off |
| − | * Power consumption: 15 W/400 W (idle/volume) | + | * Leistungsaufnahme: 15 W/400 W (Leerlauf/Volleistung) |
| − | * Dimensions: 445 x 60 x 365 mm (WxHxD) | + | * Abmessungen: 445 x 60 x 365 mm (BxHxT) |
| − | * Weight: 10,5 kg | + | * Gewicht: 10,5 kg |
| − | * New price approx: | + | * Neupreis ca.: |
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| − | '''Connections''' | + | '''Anschlüsse''' |
| − | * Number of inputs: | + | * Anzahl der Eingänge: |
| − | ** 2x stereo: 2000 mV, 97 kOhm. | + | ** 2x Stereo: 2000 mV, 97 kOhm |
| − | * Number of outputs: | + | * Anzahl der Ausgänge: |
| − | ** 2 x speaker pairs | + | ** 2 x Lautsprecherpaare |
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| − | '''Technical Data''' | + | '''Technische Daten''' |
| − | * Continuous sinus power (at THD). | + | * Dauersinusleistung (bei Klirrfaktor) |
| − | ** 8 Ohm: 80 W (0.01%) | + | ** 8 Ohm: 80 W (0,01%) |
| − | 4 Ohm: 110 W (0,01%) | + | ** 4 Ohm: 110 W (0,01%) |
| − | * Dynamic power | + | * Dynamikleistung |
| | ** 8 Ohm: n.b. | | ** 8 Ohm: n.b. |
| | ** 4 Ohm: n.b. | | ** 4 Ohm: n.b. |
| − | * Total harmonic distortion: n.b. | + | * Gesamtklirrfaktor: n.b. |
| − | * Attenuation factor: n.b. | + | * Dämpfungsfaktor: n.b. |
| − | * Frequency response: 100 kHz High frequency protection circuit switches off at approx. 40kHz. | + | * Frequenzgang: 100 kHz Hochfrequenzschutzschaltung schaltet bei ca. 40kHz ab. |
| − | * Signal to noise ratio: 102 dB at 5 W and 100 Ohm source impedance | + | * Signalrauschabstand: 102 dB bei 5 W und 100 Ohm Quellwiderstand |
| − | * Stereo channel separation: 87 dB | + | * Stereokanaltrennung: 87 dB |
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| − | '''Special Features''' | + | '''Besondere Ausstattungen''' |
| − | * Die-cast aluminium housing is also the heat sink | + | * Alu-Druckgussgehäuse stellt gleichzeitig den Kühlkörper dar |
| − | * Toroidal transformer, to reduce magnetic interference in the amplifier circuit, shielded by additional housing | + | * Ringkerntrafo zur Verminderung von magnetische Einstreuungen in die Verstärkerschaltung durch zusätzliches Gehäuse geschirmt |
| − | * Can be switched on remotely by control cable via V32 | + | * Ferneinschaltbar durch Steuerkabel |
| − | * Electronic protection circuits effective at: | + | * Elektronische Schutzschaltungen wirksam bei: |
| − | ** High frequency, DC voltage at speaker output | + | ** Hochfrequenz, DC am Lautsprecherausgang |
| − | Overtemperature output stage transistors
| + | ** Übertemperatur Endstufentransistoren |
| − | Overtemperature of mains transformer
| + | ** Übertemperatur Netztrafo |
| − | * Defect of a device fuse on the power amplifier board is indicated by LED. | + | *Defekt einer Gerätesicherung auf der Endstufenplatine wird durch LED angezeigt. |
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| − | == Remarks == | + | == Bemerkungen == |
| − | Stereo power amplifier in service-friendly modular design. | + | Stereo Leistungsverstärker in servicefreundlicher Modulbauweise. |
| − | Classic push-pull power amplifier with bipolar power transistors in AA-B circuit bridgeable to mono. Because of the weak power supply
| + | Klassische Gegentaktendstufe mit Bipolarleistungstransistoren in AA-B Schaltung auf Mono brückbar. Wegen des schwachen Netzteils |
| − | an increase of power up to 280W can only be expected with a loudspeaker impedance of 8 Ohm.
| + | ist in Brückenschaltung nur bei einer Lautsprecherimpedanz von 8 Ohm mit einer Leistungserhöhung auf 280W zu rechnen. |
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| − | Other models of the same series:
| + | Weitere Modelle der gleichen Serie: |
| | * Tuner T22 | | * Tuner T22 |
| − | * Preamplifier V32 | + | * Vorstufe V32 |
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| − | Error symptoms of the aging electronics
| + | == Bilder == |
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| − | Cracked electrolytic capacitors with loss of capacitance on the power amp modules due to high temperatures.
| + | == Berichte == |
| − | Replace suspected electrolytic capacitors with low-ESR types, e.g. Panasonic, at best all per power stage module board.
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| − | * Cold solder joints on the input rectifiers
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| − | --> Check the solder joints of the board and re-solder suspicious ones. Because of the screwed on heat sink at the bridge rectifier
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| − | bridge rectifier, cold solder joints often occur here as a result of the application of force. This can be seen if the heat sink is too tight when
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| − | the heat sink leans in one direction.
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| − | * Protective circuit of the output stage switches off after a longer period of operation because of too high offset.
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| − | Parameter drift of one transistor in the discrete differential input stage (important to use paired equivalent transistors (current gain factor Ic_beta + Ube) from reputable manufacturers). Pairing is no longer witchcraft with the universal component testers available today!!!
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| − | Loudspeaker signal first on one side, then at higher volume on both channels.
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| − |
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| − | Clean oxidized contacts of output relays with emery cloth or replace relays with new compatible type.
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| − | | |
| − | --> Oxidised RCA sockets (main cause) or cold soldered joint due to mechanical force
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| − | | |
| − | --> Oxidized contacts input relay (Attention: Siemenstype is not pin compatible with DIL-relay). Clean contacts or replace relay contacts with wire bridges.
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| − | Missing basses, sound image shifted from the stereo center
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| − | | |
| − | --> Loss of capacitance of the only coupling capacitor on one of the power amp boards
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| − | Only the experienced electronics engineer should dare to repair his valuable Kücke electronics.
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| − | ATTENTION: Inside the output stage there are voltages exceeding 42V, the VDE guidelines have to be observed.
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| − | Often more is broken by the intervention (repair attempt) than repaired and ends up in the worst case in the online auction house. Burned traces, misaligned trimmers (you should know what you're doing if you mess around with trimmers for no reason without knowing their function) etc. are the result.
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| − | If in doubt, contact the competent repair service of Kücke see link on the company profile!
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| − | == Pictures == | |
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| − | == Reports ==
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| | == Links == | | == Links == |
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| − | [[Category:Power Amplifiers]] | + | [[Kategorie:Endstufen]] |