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Gross-Super 53 SH924W

Gross-Super 53 SH924W; Siemens; D S.& (ID = 34700) Radio
 
Gross-Super 53 SH924W; Siemens; D S.& (ID = 153307) Radio
 
Gross-Super 53 SH924W; Siemens; D S.& (ID = 153308) Radio
 
Gross-Super 53 SH924W; Siemens; D S.& (ID = 153309) Radio
 
Gross-Super 53 SH924W; Siemens; D S.& (ID = 798472) Radio
 
Gross-Super 53 SH924W; Siemens; D S.& (ID = 798474) Radio
 
Gross-Super 53 SH924W; Siemens; D S.& (ID = 798476) Radio
 
Gross-Super 53 SH924W; Siemens; D S.& (ID = 153310) Radio
Gross-Super 53 SH924W; Siemens; D S.& (ID = 13463) Radio Gross-Super 53 SH924W; Siemens; D S.& (ID = 90604) Radio
Gross-Super 53 SH924W; Siemens; D S.& (ID = 798050) Radio Gross-Super 53 SH924W; Siemens; D S.& (ID = 90603) Radio
Gross-Super 53 SH924W; Siemens; D S.& (ID = 2063811) Radio Gross-Super 53 SH924W; Siemens; D S.& (ID = 21980) Radio
Gross-Super 53 SH924W; Siemens; D S.& (ID = 19100) Radio Gross-Super 53 SH924W; Siemens; D S.& (ID = 125860) Radio
Gross-Super 53 SH924W; Siemens; D S.& (ID = 152656) Radio Gross-Super 53 SH924W; Siemens; D S.& (ID = 152657) Radio
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Gross-Super 53 SH924W; Siemens; D S.& (ID = 13463) Radio
Siemens; D S.&: Gross-Super 53 SH924W [Radio] ID = 13463 640x480
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For model Gross-Super 53 SH924W, Siemens; D (S.& Halske / S. Electrogeräte)
 
Country:  Germany
Manufacturer / Brand:  Siemens; D (S.& Halske / S. Electrogeräte)
Year: 1952/1953 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 8: EF80 EC92 ECH81 EF41 EM34 EF41 EABC80 EL41
Semiconductors (the count is only for transistors) SSF250/85B
Main principle Super-Heterodyne (Super in general); ZF/IF 468/10700 kHz
Tuned circuits 8 AM circuit(s)     11 FM circuit(s)
Wave bands Broadcast, Long Wave, Short Wave plus FM or UHF.
Details
Power type and voltage Alternating Current supply (AC) / 110, 125, 150, 220, 240 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 20 cm = 7.9 inch
Power out
from Radiomuseum.org Model: Gross-Super 53 SH924W - Siemens; D S.& Halske / S.
Material Wooden case
Shape Tablemodel with Push Buttons.
Dimensions (WHD) 595 x 398 x 275 mm / 23.4 x 15.7 x 10.8 inch
Notes

Regelbare Bandbreite. Lautsprecher mit Alu-Gusskorb, Impedanz: 16 Ohm
Siehe auch gleiches Modell in der Schweiz.

Der Katalog des Rundfunk-Grosshandels führt das Gerät irrtümlich mit einer Höhe von 298 mm und einem Gewicht von 15 kg.

Net weight (2.2 lb = 1 kg) 13.3 kg / 29 lb 4.7 oz (29.295 lb)
Price in first year of sale 399.00 DM
Collectors' prices  
Source of data Kat.d.Rundf.GrossH.1952/53 / Radiokatalog Band 1, Ernst Erb
Literature/Schematics (1) -- Original-techn. papers.


All listed radios etc. from Siemens; D (S.& Halske / S. Electrogeräte)
Here you find 2382 models, 1953 with images and 1243 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



 


Forum contributions about this model
Siemens; D S.&: Gross-Super 53 SH924W
Threads: 1 | Posts: 1
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siemens: SH924W; Gross-Super 53
Frank Pascale
23.Apr.11
  1

 

Intermittent Audio Level from Embrittled Rivets in Volume Control

 

I obtained a beautiful Gross Super 53 in 2005 (SH 924 W), with a nearly perfect cabinet and very clean chassis for $175 on e-bay.  During its restoration I came across an interesting problem that may be of help to restorers of radios of this era, and a gentle warning too.  After extensive replacement of virtually all of the capacitors, and substitution of 1N4005’s for the high resistance rectifiers, I was initially rewarded with a wonderful sounding radio.  Prior to starting alignment, I let it play but noted that from time to time the audio level would fall dramatically, and by pushing any of the piano keys, the audio would return to normal levels.  Unfamiliar with these keys, I first assumed that the problem was in a dirty connection in the switch levers associated with the keys.  A dramatic cleaning followed with an American product called “Big Bath”.  It should have been called “Big Mistake.”  It certainly cleaned, then promptly softened the cores of most of the tunable coils, and I watched with horror as the slugs sagged, then hardened into new positions from which they could not be subsequently budged.  (Until one-for-one replacement 4 years later from a ’53 that had been wrecked in shipment to me, the calibration remained a bit goofy on every band.) 

 

But still, no cure for the volume problem until I accidently tapped the volume control directly after loss of volume.  That is where the problem was really centered.  The shock of activating the piano keys simply jolted the control itself, and in fact, the piano keys were never really an issue.

 

But what was the actual problem?  Aggressive cleaning of the control was useless, and I finally disassembled it completely.  The real problem was the brass rivets that connected the carbon raceway to the contacts on the opposite side of the phenolic, and careful measurements with an ohmmeter confirmed the intermittent connection.  (The first picture attached below shows the rivets from the carbon raceway side.)  My first attempt to repair simply soldered the rivets on the opposite side to the connections (shown in the second figure).  This failed too, as the real problem was that the brass rivets had become embrittled and were incapable of providing the necessary tension against the raceway.  Low power microscopic examination of the rivets strongly suggested that they had become quite granular in appearance, supporting this potential interpretation.

 

In the end, I carefully drilled out the rivets, and used them as washers beneath 2-56 screws and nuts, installed, gently tightened and trimmed with a Dremel tool (screw heads facing the raceway side).  In my excitement of its success, I failed to leave a photo record, so you will have to imagine this step!  The control was carefully reassembled (some dots of epoxy helped), and the radio has worked faithfully for some 6 years now.  With all the grief to make it work and my foolishness with “Big Bath”, it remains my favorite.

 

 
Siemens; D S.&: Gross-Super 53 SH924W
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