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78WK

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78WK; AEG Radios Allg. (ID = 4005) Radio
AEG Radios Allg.: 78WK [Radio] ID = 4005 819x543
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For model 78WK, AEG (Radios) Allg.Elektricitäts-Ges.
 
Country:  Germany
Manufacturer / Brand:  AEG (Radios) Allg.Elektricitäts-Ges.
Year: 1938/1939 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 6: ACH1 AF3 AB2 AL4 AM2 AZ1
Main principle Super-Heterodyne (Super in general); ZF/IF 468 kHz
Tuned circuits 7 AM circuit(s)
Wave bands Broadcast, Long Wave and Short Wave.
Details
Power type and voltage Alternating Current supply (AC) / 110-240 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out
from Radiomuseum.org Model: 78WK - AEG Radios Allg.Elektricitäts-
Material Wooden case
Shape Tablemodel, low profile (big size).
Dimensions (WHD) 660 x 360 x 310 mm / 26 x 14.2 x 12.2 inch
Notes variable Bandbreite
Net weight (2.2 lb = 1 kg) 17 kg / 37 lb 7.1 oz (37.445 lb)
Price in first year of sale 298.00 RM
Collectors' prices  
Source of data Handbuch WDRG 1938 / Radiokatalog Band 1, Ernst Erb
Circuit diagram reference Lange+Schenk+FS-Röhrenbestückung
Picture reference Das Modell ist im «Radiokatalog» (Erb) abgebildet.


All listed radios etc. from AEG (Radios) Allg.Elektricitäts-Ges.
Here you find 791 models, 673 with images and 398 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



 


Forum contributions about this model
AEG Radios Allg.: 78WK
Threads: 1 | Posts: 1
Hits: 1367     Replies: 0
aeg: 78WK (78 WK); - 'switchable' coupling capacitor?
Robert Sarbell
04.Jul.08
  1 Gentlemen,

This posting relates to servicing problems on my Telefunken model 776WK but is cross-referenced due to VERY common circuitry. . . . I also place a similar post to the TFK 776WK model.

While reviewing the schematics for the AM2 to AL4 audio coupling capacitors on the model AEG 78WK, and very similar circuits on the Telefunken 776WK and Telefunken 876WK, I notice the switchable extra coupling capacitor installed on the AEG78 and the TFK 876WK - but not on the telefunken 776WK.

Was that perhaps an intentional circuit change, or an omission on the schematic of the 776WK.

There are also differences within the AL4 output (control grid g1 resistor ratings) on the respective models - from 100/.5M ohms to 1,000/.5M ohms

I had for a brief period of time reception of stations on the MW and KW bands although the alignment was off by approximately 60 to 70kHz. After replacing the BF2 transformer, and confirming continuity on both sides, now I am back to the "mute" radio. . .

I would be most appreciative if any member has had similar experiences and could provide some helpful hints!

NOTE:
All tubes have been replaced with new ones, EXCEPT the AB2 detector. . . .That tube has been ordered from a seller in Europe and will be installed within the next week or so.

Respectfully,
Robert
 
 
AEG Radios Allg.: 78WK
End of forum contributions about this model

  
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