simplex: ; W All Wave Reconstruction

Dear Radiofriends,

On 1st of Feb 2005 I have written that I would rebuild this radio. I just began to do it.

I'm working on a new cabinet. That’s how it looks by now.

I’m also working at same time on the chassis circuit. Then I’ve notice that a push-pull transformer is missing.

 I can't get know its characteristics.

I believe that someone knowledgable in Rmorg, reading data from this schematic, can help me with some hint. Do you ?

Thank you in advance.

Mario Coelho

The complete schematic is in Nostalgia Air.

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Audio Interstage Transformers are sold by Antique Electronic Supply (tubesandmore.com). 
The 85 triode is specified with an impedance of 20 kOhm. The Xformer P-T124E would come closest, having 15 kOhms. Furthermore this type gives the choice of different step up ratios: 1:1.5 / 1:3 / 1:6 .

Good luck,
KoBi

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Dear Konrad

I apologise for having replied you so late but I was absent in recent days.
Thank you for your prompt response and for the indication of the Transf. data.
A friend, here in Portugal, has offered to make a new  transformer, according to the values that you have indicated. Lucky me . :-)

Meanwhile the cabinet is improving slowly.

Cordially

Mário Coelho

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Dear Friends,

The driver transfo is already repaired. It has now 15000ohms and 1:5 ratio.

Also the out-put Push-pull transfo had also to be repaired. The intermediate terminal of the primary coil was interrupted. It has also a general winding insulation failure.

 

Meanwhile I have made the moulds to replicate  4 new knobs from an original one.

Best Regards

Mário Coelho

 

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Dear Friends,

I hope I do not abhor you with this. If I do, I apologize.

This is my last next step. To inlay two friezes.

On the WORKBENCH

I promise that

I only will be back here when this cabinet is finished.A  French Lacquer's finishing. That's what I reserve to it. 

Cordially

Mário Coelho

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Dear Radiofriends

Finaly it is done!!

Finishing detail

 

Next  I'll send some better photos to this model's page.

It sounds fine on broadcast  but I need yet to adjust the SW frequencies.

Thank you for your patience. 

Cordially

Mário Coelho

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hello mario, a brilliant piece of workmanship, most edifing desplay ive seen for some time , keep at it mario, and for your final pictures of it , [whenever that is ], will you give us a shot of the chasis with the back removed , i presume there is a back board / best regards maitiu.

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Dear Maitiu

Thank you for your kind words.

I've sent already some pictures to the model's page. Meanwhile I'll send these two now. The chassis was not restored brand new as the cabinet.  I'll do it later.

 

Best Regards

Mário

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