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Opus 6 HiFi-System Licensed by Armstrong

Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 26713) Radio
 
Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 26715) Radio
 
Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 26716) Radio
 
Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 26717) Radio
 
Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 26718) Radio
 
Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 26714) Radio
 
Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 26719) Radio
 
Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 26720) Radio
 
Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 26721) Radio
 
Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 26722) Radio
Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 44463) Radio Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 45359) Radio
Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 59863) Radio Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 58914) Radio
Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 10606) Radio Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 59966) Radio
Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 913900) Radio Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 943494) Radio
Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 951515) Radio Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 951519) Radio
Altre immagini: scorri con la barra rossa.
Opus 6 HiFi-System Licensed by Armstrong; Telefunken (ID = 44463) Radio
Telefunken: Opus 6 HiFi-System Licensed by Armstrong [Radio] ID = 44463 794x527
Seleziona le anteprime di foto e schemi a destra per ingrandirle, e clicca qui sopra per il download.
For model Opus 6 HiFi-System Licensed by Armstrong, Telefunken Deutschland (TFK), (Gesellschaft für drahtlose Telegraphie Telefunken mbH
 
Paese:  Germania
Produttore / Marca:  Telefunken Deutschland (TFK), (Gesellschaft für drahtlose Telegraphie Telefunken mbH
Anno: 1955/1956 Categoria: Radio (o sintonizzatore del dopoguerra WW2)
Valvole 9: ECC85 ECH81 EF89 EF89 EM80 EABC80 EC92 EL84 EL84
Semiconduttori (transistor solo contati) B250C125
Principio generale Supereterodina (in generale); Modello per l'esportazione
N. di circuiti accordati 8 Circuiti Mod. Amp. (AM)     11 Circuiti Mod. Freq. (FM)
Gamme d'onda Onde medie (OM), lunghe (OL), corte (OC) e MF (FM).
Particolarità
Tensioni di funzionamento Alimentazione a corrente alternata (CA) / 110-120 Volt
Altoparlante 6 altoparlanti
Potenza d'uscita
Radiomuseum.org Modello: Opus 6 HiFi-System Licensed by Armstrong - Telefunken Deutschland TFK,
Materiali Mobile in legno
Forma Soprammobile con pulsantiera/tastiera.
Dimensioni (LxAxP) 640 x 405 x 275 mm / 25.2 x 15.9 x 10.8 inch
Annotazioni Photofact Folder, Version A and B or Chassis. Power Supply 60 Cycles. Supplier was American Elite, Inc., 7 Park Ave., New York.
Peso netto 15.5 kg / 34 lb 2.3 oz (34.141 lb)
Letteratura / Schemi (1) -- Original-techn. papers.


Elenco delle radio e altri apparecchi della Telefunken Deutschland (TFK), (Gesellschaft für drahtlose Telegraphie Telefunken mbH
In questo link sono elencati 3471 modelli, di cui 3040 con immagini e 2008 con schemi.



 


Discussioni nel forum su questo modello
Telefunken: Opus 6 HiFi-System Licensed by Armstrong
Argomenti: 2 | Articoli: 12
Visite: 3077     Risposte: 8
telefunken: 6; Opus - Pyramid capacitor?
Jamie Nickel
23.Feb.14
  1

I'm working on re-capping a Telefunken Opus 6 and I came across a Pyramid brand capacitor that isn't listed in the parts list.   It appears to be a big electrolyitc capacitor 16uF - 450V that's mounted on top of the chassis by the transformer. Here's a picture the capacitor in question.

Does anyone know if this was the correct capacitor installed by the factory? I was wondering if someone may have replaced the original capacitor with the wrong size since I couldn't find this one in the parts list.  Thanks!

 

Allegati

Bruno Gandolfo-Canepa
25.Feb.14
  2

Hello Jamie,

I have never saw one elko cap like this inside a German radio. It is not one original replacement for sure.

Cordially, Bruno.

Jamie Nickel
25.Feb.14
  3

Thanks for the reply Bruno!  Do you know if the 16uF - 450V is the right value capacitor for this location? The radio works now, but the sound starts to fade after about 10 minuites and the radio warms up. 

Sincerely,

Jamie

Bruno Gandolfo-Canepa
25.Feb.14
  4

You are wellcome Jamie, 

I do not have that radio. On the model's page you have all the technical information: the circuit, the parts list and the 3-D diagram to identify the capacitor over the output transformer. Then you can make the appropriate replacement.

Respectfully, Bruno.

Jamie Nickel
26.Feb.14
  5

The diagram shows C82, which correspondes to a 2200pF cap on the parts list. The aftermarket 16uF Pyramid cap is installed in this position. The Pyramid cap looks old too, so it's probably been in there a while.  Whoever installed this aftermarket cap wasn't even close in choosing the correct size! 

Thank you!

Jamie

Ruben Garcia Bayon
02.Mar.14
  6

Hello 

 

I think this cap is not original too.

Photos are not clear, but may be this "Pyramid" cap are put in parallel with C5? . C5 is located below on your photo, 50uF. This could be done by somebody to somewhat "improving" the sound. C5 is in series with the tweeters.

And I think that C82 are in your photo too, just between the 50uF and the piramid.

 May be, you could tell us where this cap is conected. (vg: positive to ping xxx of xxx, ...)

 

Regards

 

Omer Suleimanagich
16.Mar.14
  7

Please follow the radio's schematic, for capacitor replacement.

The most important thing in this radio , is to replace the selenium rectifier, with a silicon bridge rectifier and a dropping resistor.  Something that has been very well explained on this forum already, on other threads.

Make sure to replace all paper capacitors and electrlytic capacitors, and then seeing if any resistors are questionable.

 

Best

 

Jamie Nickel
04.Apr.14
  8

Just wanted to provide everyone an update on the Opus 6. I ended up replacing all the electrolytic and paper caps. The radio sounds beautiful now and I see why so many people are impressed by the way they sound.

An interesting observation I had, was someone installed that Pyramid capacitor that wasn't even listed in the schematic or parts manual, so I removed it from the circuit.  Also, before I had finished replacing all the underside caps around the EL84 tubes, the radio would sound great for about 10 minutes, then start to sound "farty", the bass would become punchy sounding.  During this time, I noticed the rear-most EL84 tube would run much hotter than the front-most EL84 tube.  Well, replacing all the caps connected to these tubes on the underside resolved that issue.  Here's pics of the new caps installed and the stand I made to hold the chassis upside down.

Allegati

Omer Suleimanagich
05.Apr.14
  9

Please check the selenium rectifier, if it is running VERY hot, and check to see what voltage it is kicking out in DC.  These rectifiers are known to be bad, and a bad one, can damage your transformer!

 
Visite: 4703     Risposte: 2
telefunken: 6; Opus
Omer Suleimanagich
05.May.05
  1 I have recently resurrected an Opus 6 from the dead!

Amongst things that were done to the radio including recapping, replacement of off tolerance resistors, Ferrite antenna repair, re stringing FM, lubricating all moving parts, replacement of very weak tubes/valves, spot speaker repair on one of the speakers, the cabinet needed the base to be reattached, veneer repair, and refinishing.

Not that I'm bragging, but this is the type of stuff we are all here for!

After getting the radio to work, and adjusting the FM tuning to the scale, I wish to improve the sensitivity on MW/AM.

All connecting wires on the ferrite core antenna are connected properly and there are no shorts. All the resistors around the ECH81 are within tolerance. ECH 81 is new (Telefunken!). Radio is receiving maybe 65-75% of its potential.

How does one go about increasing the sensitivity in this radio?

Omer

P. S. This table radio, with its six speakers, is in my opinion, a Stradivarius in fiftie's German radios!
Hans M. Knoll
05.May.05
  2   Hello Mr. Suleimanagich,

You are searching for some one with experience in improving the receiving ability of this set.    Maybe some one posting here his results.

I to not have this radio, I only can say to you, in this early time 1955/56,  the ferrit -antennas have mostly  40 to 60% from sensitivity of designs from now.
In this time, the sensitivity of the extern Antennas has priority! 

I do not now,, if you mean your set has an failure, or you want to redesign the circuit. From where is your indention of:  Radio is receiving maybe 65-75% of its potential.
Have you make any measurements about sensitivity an grid 1 ( pin2) ECH81 on IF and RF?
First:
The ratio sensitivity on IF to RF on 1Mcs should be: 1 to 1,2 to 1,3 ( for example: 10 uV on IF  to 12 uV on 1Mcs) This is very important for the ratio of signal to noise!
Second:
Additional,  from antenna to this G1 ECH81 the RF is the only value to improve  the reception.

The IF gain makes only more noise and wanted power on the speakers. The volume potentiometer can compensate this over a with range! 

Have you test the value of local-oscillator ( Volts AC or Volts DC) on g1 of Triode ECH81?
To you have a Signalgenerator?

O.K. I am waiting for your comments,
Regards Hans M. Knoll

Omer Suleimanagich
06.May.05
  3 Thank you so kindly Herr Knoll for your quick response!

As explained in the first part of this thread, the ferrite antenna was basically in two pieces and had to be reconstructed ( using a metallic epoxy to put the ferrite pieces together), including the thin copper wires needing to be soldered to new 32(?) gauge wire. There was a short in one of the solder joints....now its fixed!

As I'm writing this reply, I'm listening to a fifties Hit Parade station, currently playing Cab Calloway's, "Minnie the Moocher", with the magic eye so bright it's blinding me! A station I could barely pickup yesterday

All the very best!

Omer
 
Telefunken: Opus 6 HiFi-System Licensed by Armstrong
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