stromberg: 601-A

On this radio, there is a audio transformer used as a choke (I'm guessing). The 45v+ was attached to one of the leads of the primary and the other went to the first audio transformer and to the plate on the detector tube.
I was normal to have an audio transformer there? I have seen that transformer used in older models of Stromberg. Did they use left overs to build this model?
Would this be a 1:3 or 1:4 transformer?
Was this a replacement of later days?

Thanks for your help

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Hello Daniel,

In my collection, I have your mentioned model. It is in a very good and original condition.  I cannot find your audio transformer used as a choke. Where about is the transformer situated? Please be so kind and present us some pictures.

Looking forward

Best wishes from the Black Forest

Wolfram

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It is located directly under the power connections attached to the frame. I know that the transformer is old. The schematics show a choke under the firts stage audio output

• Picture 1 (77 KB)

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The Transformer is original

Thank you for the picture. Yes it is correct, that there was used a Transformer as a choke. The secondary winding with the high resistance was used as the choke winding. The ratio is 4:1

Best regards

Wolfram

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Thanks for the help, i had an output transformer that fitted inside that original case. I'm getting some sound out of the radio, now i think it just need to be aligned. By the way do you know how the nuetralizing capacitors in this unit work? I see that they have a wierd looking nut but i loosen it thinking that the middle part will mive up and down but nothing happens. Thanks again for your help.

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