Musica 817

Graetz, Altena (Westfalen)

Data
Forum
Pictures
Collections

  • Year
  • 1959/1960
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 22080

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 8
  • Number of Transistors
  • Main principle
  • Superheterodyne (common); ZF/IF 460 / 6750 kHz; 2 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)     10 FM circuit(s)
  • Wave bands
  • Broadcast, Long Wave, Short Wave plus FM or UHF.
  • Power type and voltage
  • Alternating Current supply (AC) / 110; 127; 150; 220 Volt
  • Loudspeaker
  • 3 Loudspeakers
  • Power out
  • 6 W (unknown quality)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Musica 817 - Graetz, Altena Westfalen
  • Shape
  • Tablemodel with Push Buttons.
  • Dimensions (WHD)
  • 610 x 365 x 260 mm / 24 x 14.4 x 10.2 inch
  • Notes
  • Stereo-Endstufe mit 3 Ausgangstrafos Ferritantenne schaltbar und von der Rückwand aus drehbar.
  • Net weight (2.2 lb = 1 kg)
  • 11 kg / 24 lb 3.7 oz (24.229 lb)
  • Price in first year of sale
  • 389.00 DM
  • External source of data
  • Erb
  • Mentioned in
  • -- Original-techn. papers.
  • Literature/Schematics (1)
  • -- Schematic
  • Literature/Schematics (2)
  • Funkschau (Gerätebericht, 3/1960, S. 73 f.)

 Collections | Museums | Literature

Collections

The model Musica is part of the collections of the following members.

Literature

The model Musica is documented in the following literature.

 Forum

Forum contributions about this model: Graetz, Altena: Musica 817

Threads: 4 | Posts: 22

Ich erhielt einen Anruf von einem Sammler ohne PC. Er hat dieses Gerät aufgearbeitet und nach einigem Suchen einen Fehler gefunden, der den Empfang beeinträchtigte: Die Abschirmung der EABC80 berührte, wenn sie komplett aufgeschoben wurde, den Widerstand 250 = 1 MΩ, der zum Gitter der EABC80 führt.

Nun meine Frage an die Experten: Was ist die Aufgabe der Triode der EABC80 in diesem Gerät?
Das NF-Signal aus dem Ratiodetektor wird über 10nF auf das Gitter geleitet.
Über 1 MΩ gelangt die negative Spannung vom Ratioelko auf das Gitter.
Von der Anode wird über 220pf auf das Gitter gekoppelt. Ansonsten hängt die Anode nur auf Plus.
Mir erschließt sich der Sinn dieser Schaltung noch nicht.

Heribert Jung, 28.Sep.14

Weitere Posts (8) zu diesem Thema.

Gentili Soci,

sto tentando di rimettere in funzione questa bella radio ma ho un problema che non riesco a risolvere che provoca la bruciatura del resistore "20" di 2.2 KΩ nel gruppo FM.

La radio funziona sulle altre frequenze e le tensioni che registro sono tutte nella norma, ma quando seleziono la banda UKW  che chiude il circuito con la tensione anodica, vedo immediatamene andare in fumo quel resistore, il che mi ha portato a concludere che il problema fosse nel gruppo FM.  

Ho ispezionato i condensatori (8,21,22,25,27) del circuito anodico del gruppo FM ma nessuno di loro mi è sembrato in perdita.

Volevo pertanto chiedere il vostro parere su come procedere dato che il gruppo è piuttosto "monolitico" ed il suo disassemblaggio, con le mie attuali competenze mi sembra piuttosto complesso e non privo rischi.

Ringrazio per l'aiuto e auguro un buon 2021.

Roberto

  

Roberto Licandro, 29.Dec.20

Weitere Posts (5) zu diesem Thema.

 

I would like to aid this information to the model:

All those three speakers are dynamic. This radio has stereo facility and has also two options more (two push buttons else) "R-Klg."  and "MA". The fist gives a wide space sound. The other cuts the magic eye facility and nothing more happens I can notice..

Mário

Mario Coelho, 27.Aug.03

Weitere Posts (3) zu diesem Thema.

 

Hello,

In my collection I've one Graetz Musica 817.

It is in good conditions. Needs some adjustments tough it sounds good.

Unfortunately the grille cloth has not good shape and needs replacement.

I need some help about it.

Also I would like to know the opinion of one expertise about the correct movement of one iron core inside of one coil which moves together and is synchronised with its tuning condenser.

 

Thanks in advance

  Mário Coelho

Mario Coelho, 23.Aug.03

Weitere Posts (6) zu diesem Thema.