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murphy: SAD94S (SAD 94 S);

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Forum » Radios and other type of sets (Physics) etc. » MODELS DISPLAYED » murphy: SAD94S (SAD 94 S);
           
Meyer Rochwerger
Meyer Rochwerger
 
BR  Articles: 118
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09.Jun.09 11:12

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Dear friends, I'm just finishing the restoration of a Murphy radio model SAD-94S.

Now is time to align it's IF/RF circuits but I dont find the alignment data such the IF frequency wich is not mentioned in the schematics.

I really appreciate if someone could help me with this matter.

Cheers,

Meyer

This article was edited 09.Jun.09 11:13 by Meyer Rochwerger .

Ernst Erb
Ernst Erb
Officer
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09.Jun.09 12:38

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Dear Meyer
I wanted to help you - but was astonished that the model is (was) missing the tubes, the power details and even the wave bands - and you have it in front of you ...
I don't write this because of you because you have loaded up more than 500 pictures ;-)
One reason why I took my pleasure to help you. 
It is for showing to other members how we work here (together).

My first task was to put in those parameters. Are they correct?

I then looked up schematics with the same tube line up by entering TH233 VP133 HL133DD Pen383 U403 into the "Search for Antique Radios etc. by Tubes/Valves or Semiconductors" - which gave me 7 answers - all from Murphy. One is an AD94 which attracted me. The model ha an IF of 465 kc.

Unfortunately the schematic there does not give the values. You could try if your set is near this value ...

If you have bad luck, then you might ask Keith Staines who loaded up more than 4000 schematics!

Howard Craven
 
 
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11.Jun.09 10:11

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Hello Meyer,

I've had problems getting service data for my Murphy A98 as well, circuit diagrams are readily available for these 1945 Murphy models but not service data. Anyway the good news is I have a Murphy manual covering this model except it has LW rather than SW but it should be sufficient to enable you to re-align your SAD94S and I will email it to you shortly. The IF frequency of all the AD94/SAD94 models is 465 khz so I'll update that on the model pages.

Regards ......... Howard

 

Meyer Rochwerger
Meyer Rochwerger
 
BR  Articles: 118
Schem.: 320
Pict.: 1802
12.Jun.09 13:06

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Dear Erb,

The tube line up is correct !!

Our colleague Howard Craven send me a copy of the whole service manual. As soon as possible I'll input other details to the model page.

Regards,

Meyer

Meyer Rochwerger
Meyer Rochwerger
 
BR  Articles: 118
Schem.: 320
Pict.: 1802
12.Jun.09 13:10

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Hello Howard,

Thank you for the useful service manual !!!!

This is RMORG's aim.

My best wishes,

Meyer

Mike Izycky
Mike Izycky
 
GB  Articles: 84
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13.Jun.09 15:37

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Hello Meyer,

an excellent resource for Murphy radios that does not seem to have been mentioned here is the Murphy Radio website which has an extensive selection of circuit diagrams for most models (including those for export); it is worth contacting the site's owner for more information on a particular model.

Regards,

Mike.

  
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