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Opus 7 HiFi-System Licensed by Armstrong textile grille

Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 1269217) Radio
 
Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 1269218) Radio
 
Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 26723) Radio
 
Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 622188) Radio
 
Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 622189) Radio
 
Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 622190) Radio
 
Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 622191) Radio
 
Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 622192) Radio
 
Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 622193) Radio
 
Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 622194) Radio
Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 61335) Radio Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 81940) Radio
Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 82146) Radio Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 858122) Radio
Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 950834) Radio Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 968562) Radio
Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 1269219) Radio Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 1269220) Radio
Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 1269221) Radio Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 1269223) Radio
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Opus 7 HiFi-System Licensed by Armstrong; Telefunken (ID = 61335) Radio
Telefunken: Opus 7 HiFi-System Licensed by Armstrong [Radio] ID = 61335 878x656
Select picture or schematic to display from thumbnails on the right and click for download.
For model Opus 7 HiFi-System Licensed by Armstrong textile grille, Telefunken Deutschland (TFK), (Gesellschaft für drahtlose Telegraphie Telefunken mbH:
Sammlung Dale Steel, Ridgeland, Mississippi, USA
 
Country:  Germany
Manufacturer / Brand:  Telefunken Deutschland (TFK), (Gesellschaft für drahtlose Telegraphie Telefunken mbH
Year: 1956/1957 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 9: ECC85 ECH81 EF89 EF89 EM80 EABC80 EC92 EL84 EL84
Semiconductors (the count is only for transistors) B250C125
Main principle Superheterodyne (common); ZF/IF 460/10700 kHz; Export model
Tuned circuits 8 AM circuit(s)     12 FM circuit(s)
Wave bands Broadcast, Long Wave, Short Wave plus FM or UHF.
Details
Power type and voltage Alternating Current supply (AC) / 110-120 Volt
Loudspeaker 6 Loudspeakers
Power out
from Radiomuseum.org Model: Opus 7 HiFi-System Licensed by Armstrong [textile grille] - Telefunken Deutschland TFK,
Material Wooden case
Shape Tablemodel with Push Buttons.
Dimensions (WHD) 660 x 415 x 280 mm / 26 x 16.3 x 11 inch
Notes Export model Telefunken Opus 7 is shown in the Photofact Index as being the same as export model Telefunken Opus 6 which is documented clarly in that said set 341 folder 16 from 12-56 Folder. But Opus 7 has at least the 5 additional push buttons for "Solo, Jazz, Orchester, Bass and Intim" in front of the normal 8 push buttons (both models show). There are at least Version A and B or Chassis. The Opus 7 has been made in two quite different cabinets. One has the usual textile speaker grille in front, the other has vertical wooden bars in front and ony cut outs at the sides in the woods for the other speakers. You find two different pages for them - but not different wones for the color variants which show also different glass scales and knobs.

Until we can deliver schematics for the Opus 7 USA we leave the Opus 6 USA schematics according with SAMS also on model Opus 7 USA. Power Supply 60 Cycles. Supplier was American Elite, Inc., 7 Park Ave., New York.
Net weight (2.2 lb = 1 kg) 15.8 kg / 34 lb 12.8 oz (34.802 lb)
Literature/Schematics (1) -- Original-techn. papers.


All listed radios etc. from Telefunken Deutschland (TFK), (Gesellschaft für drahtlose Telegraphie Telefunken mbH
Here you find 3443 models, 3027 with images and 2020 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



 


Forum contributions about this model
Telefunken: Opus 7 HiFi-System Licensed by Armstrong
Threads: 4 | Posts: 12
Hits: 2693     Replies: 2
telefunken: FM alignment and tuning indicator.
Paul E. Pinyot † 2013
16.Mar.10
  1

Gentlemen,

I finished a chassis restoration of an Opus 7 USA.  All electrolytic and paper type capacitors have been replaced.  The AGC electrolytic C2 has also been replaced with the same value 2uf.  All resistors checked with an ohm meter. The selenium rectifier has been replaced with a silicon bridge and a dropping resistor.  The tuning indicator was quite dim and replaced with a fresh tube.   All voltages checked and are reasonably close.
 
I completed a total alignment (am, sw and fm) and for FM used the  AM signal generator method.  The tuning indicator works great on AM but on FM it looks a bit over sensitive.  The eye will hardly open when moving between stations.
 
With FM reception the indicator hardly opens between stations.  It will open when the dial indicator is at the scale extreme (an area of no stations) and I unplug the FM dipole antenna.  Then it opens up.  I figure it may be my FM alignment technique. 
 
Q1 -  What alignment should I need to re-adjust (or start with) to yield a better tuning eye response?  Or is there another potential problem?
 
Q2 - The schematic shows two 200k resistors in series to make up test point C.  The alignment calls for 100k resistors.  I used 100k resistors. 
 
Thank you in advance for your time,
Paul
 
Found the Problem.
 
I over looked pulling a shield around the FM ratio detector tube V5.
C2 an electrolytic with + to ground was not replaced.  Once replace the
Tuning eye now properly responds.

I checked the cap on a new cap meter and read 2.2 uf.  So that did not tell
me any thing.  I hooked it up (old C2) to the simple RF gen and O-scope ESR jig and
read about 8 ohms.  Now I do not know if that is acceptable for a 2 uf electrolytic but the new 2.2uf 100v cap fixed the problem.
Paul.
Mark Hippenstiel
22.Mar.10
  2

Dear Paul,

is this still to be treated as a question? If not, then in future such cases it would be better to answer to your own post with the "information" flag set, instead of editing the original post.

Regards,
Mark

Paul E. Pinyot † 2013
22.Mar.10
  3

Mark,

I was not sure how to treat answering my own question.  Thanks for the tip.

Paul

Found the Problem.
 
I over looked pulling a shield around the FM ratio detector tube V5.
C2 an electrolytic with + to ground was not replaced.  Once replace the
Tuning eye now properly responds.

I checked the cap on a new cap meter and read 2.2 uf.  So that did not tell
me any thing.  I hooked it up (old C2) to the simple RF gen and O-scope ESR jig and
read about 8 ohms.  Now I do not know if that is acceptable for a 2 uf electrolytic but the new 2.2uf 100v cap fixed the problem.
Paul.
 
Hits: 2448     Replies: 3
Opus 7 Radio Bad FM Switch I Need Help
Dennis LaCour
21.Nov.07
  1 Hello I have a 1957 Blond Telefunken Opus 7 Radio in Nice shape,The FM switch is worn out and will not engage. I have a spare chassis but replacing the whole switch Mechanism I am Told will cost more than it's worth.Can any body tell me if there is a way to replace just the FM switch alone, or are there any other fixes ?  Thanks: D. LaCour Nashville TN
Omer Suleimanagich
21.Nov.07
  2

Dennis,

Do you think that you would be able to loosen the screws on the bottom to see if the FM switch will engage?

When loosening screws and moving the chassis, be careful NOT to shatter the dial glass!

If loosening the chassis solves the problem, you might need to replace the rubber gaskets between the radio chassis and cabinet, to establish enough play so that the switch engages.

Otherwise, this "wear" you're talking about is VERY rare.

Maitiu Standun
25.Nov.07
  3 hello dennis, have you tried switch lubricant , comes in an aerosol with an extention tube to allow fluid to get into the contacts , and remove corrosion , usually this is all thats needed , regards maitiu.     
Ernst Erb
10.Dec.07
  4

It is a members duty to react if he/she gets answers. It is also friendly ...

For making this easy we did foresee two devices (links) for an easy remembering:
To activate e-mail notification for this board (or thread only).
and
*** Please remind me ... ***

I don't want to "spoil" our members who do answer questions and therefore write such reminders - also to keep up the correct AND reacheable eMail-address in the profile (for getting the notices).

It would be much better that some persons who answer questions do this reminders instead of me who has already a too great load for RMorg.

We have two ways - caring - or not caring ... You probably know where it leads to later if only ONE person does the caring. There will be a time after me and I fear that all my efforts are in vain if you don't care!

We should have members who care more for their language section. My English is not sufficient too  ...

 
Hits: 6152     Replies: 2
telefunken: Telefunken Opus 7 USA
Omer Suleimanagich
29.Dec.05
  1 Would someone out there know why the Telefunken power transformer only has 216 VAC secondary (230VAC unloaded)on the US model, but the schematics say 255VDC @110 mA for the B+ after the selenium bridge rectifier?

When my radio is powered up the reading on my radio is 233 VDC for the B+ after the selenium bridge rectifier.

Omer
Georg Richter
30.Dec.05
  2 Hi Omer,

In theory B+ is ~ AC * 1,4142

I assume that you have checked/replaced the electrolytic and paper caps?

If the transformer and the caps are OK and B+ is too low
the selenium rectifier may be off-spec (higher internal resistance
than specified).

Selenium rectifiers are similar candidats like vacuum rectifiers
which needs to be replaced after some decades ;-)
They can additionally become ill or die by environmental influence.

If you do not find a good NOS spare part I would use four 1N4007
instead, and a resistor to drop B+ to the requirement of the circuit diagram.

The difference between AC secondary unloaded versus loaded will
increase if the rectifier is in normal condition, it depends on
the resistance of the transformers high voltage windings and the load.

Hope that helps.

Kind Regards
Georg
Omer Suleimanagich
31.Dec.05
  3 Thanks for the reply!

The reason why I am posing this question is, the Telefunken Hannover tranformer has "216 VAC" for the secondary written on the side. How do you get from 216 VAC to 255 VDC @110mA after the rectifier, under load (the Opus 7)?

The transformer is about 227 VAC unloaded.

I definatly will go with a silicon bridge special with adequete dropping resistor, but if I'm not mistaken, Max Grundig's transformers were all about 274 VAC unloaded of this vintage, meaning that they were about +/-255 VAC loaded.

Just wondering

Omer

BTW I was able to cure the vibrating transformer by injecting , with a syringe, GC Red Insulating Varnish into the core and hammering thin wooden wedges at the top.
 
Hits: 3928     Replies: 1
telefunken: 7; Opus
Omer Suleimanagich
21.Nov.05
  1

Can someone provide any information for the original power (mains) transformer for this radio.

What would be a good replacement power transformer, what is the voltage and mA for the B+, and what is the amperage rating for the filament?

Does anyone have any information for the orginal "Hannover" transfomer?

The present transformer works but is vibrating (I did tighten the four bolts to the trans).

Any sugestions on what should be done?

Kindly appreciated!

Omer

Omer Suleimanagich
27.Nov.05
  2 After much web surfing and searching many sites that sell transformers, I found a transformer manufactuered by the Hammond Company , Canada, that has a 117vac primary, a 275vac (125mA)secondary, and a 6.3 vac (4 amps) filament.

Here is an example of a Hammond transformer mounted on a Telefunken Opus 9u.

Omer

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Telefunken: Opus 7 HiFi-System Licensed by Armstrong
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