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philips: Schwebungssummer GM2308

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Forum » Radios and other type of sets (Physics) etc. » MODELS DISPLAYED » philips: Schwebungssummer GM2308
           
Julian Hardstone
 
 
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08.Nov.19 00:14

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What is a Schwebungssummer? I presume this is a German word but dict.tu-chemnitz.de can only tell me that Schwebung is a frequency-beat.

The GM2308 should be called a Toongenerator or Signal Generator, not Schwebungssummer. A signal generator does not itself generate 'tone beats' it provides one of the tones from which another equipment can generate beat-notes.

I see from the onderwijs manual posted here that the manufacturer calls it simply Philips Toongenerator GM2308 and nowhere mentions Schwebungs

Thanks for giving all the information and images of this model - Julian

Wolfgang Holtmann
Wolfgang Holtmann
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08.Nov.19 11:54
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Hello Mr. Hardstone

You wrote:

The GM2308 should be called a Toongenerator or Signal Generator, not Schwebungssummer. A signal generator does not itself generate 'tone beats' it provides one of the tones from which another equipment can generate beat-notes.

The German expression "Schwebungssummer" means simply that the generated LF is the result of internal mixing of two frequencies!

One oscillator is tunable between 85 and 100kHz, the other from 100 to 101kHz. By this manner the tone beats are in the LF range of 0 to 16kHz which can be obtained without switching, indeed a great advantage....

Kind regards

Wolfgang Holtmann
Wolfgang Holtmann
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09.Nov.19 07:46

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For additional clarification,
may I draw Your attention to the GRUNDIG Beat Frequency Oscillator Type 295.

Using the same working principle by mixing two HF frequencies and cut out the unwanted remains with a low pass filter.

Also MARCONI produced one called TF 601A.

Kind regards

Georg Richter
Georg Richter
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10.Nov.19 19:46
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Gentlemen,

please let me join the discussion.

At first, it does not matter how other manufacturers are naming similar models.

At second,  RMorg shall be as precise as possible.

The uploaded catalogue sheet names GM2308 simply "Tongenerator".

Same in the Netherlands instruction manual: "Toongenerator"

This US model has correct name "Beat Frequency Oscillator" which was extended with "Schwebungssummer" in brackets by any reason.

So I would suggest to change GM2308 model name to original. If you insist  with "Schwebungssummer" in brackets.

But I have to remark that French and english speaking members do not understand "Schwebungssummer".

In 2006 the model was accepted as "Tongenerator (Toongenerator)", in 2008 changed  to "Schwebungssummer".

Best Regards,

GR

This article was edited 10.Nov.19 20:17 by Georg Richter .

Georg Richter
Georg Richter
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12.Nov.19 22:33
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Meanwhile the model name was precised  to

"Tongenerator / Toongenerator (Schwebungssummer) GM2308"

It shall be recognized that "Schwebungssummer" ist not the only purpose.

I hope that all are satisfied now.

Best Regards,

GR

Julian Hardstone
 
 
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12.Nov.19 23:21
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Many thanks for the change. Do we now have two German names? I don't know your naming conventions, but I see you use English for other signal sources, like TF2100 or TF2102M

  
rmXorg