The Leutz Model C with the Model K antenna adaptor is a full 4 feet long. It would have been built as a kit around the beginning of 1924.
I have been told that this radio was built by a local radio station engineer.
I have been told that this radio was built by a local radio station engineer.
The model K antenna adaptor on the left, above, allows the use of a long wire antenna and ground rather than a loop antenna.
This is the model K removed from its cabinet..
This model C was built mostly from parts manufactured by General Radio including the model 271 IF transformers. The large 1uf caps were manufactured by Federal. You might notice the C battery installed inside of the factory-built cabinet. While there were additional connections on the left side of the radio that could have been used for the C battery, the addition of the K adaptor would have required the wires to run around or over the cabinet. This was a much cleaner application for that battery.
The Soldering performed in the original assembly was not too good. He also made several splices where it should have been a continuous run of buss wire. When the radio was found about a dozen of these wires had broken free and were in the bottom of the cabinet. One of the General Radio 271 IF transformers had an open winding. I believe that the builder may have overheated or twisted the contact since the winding was broken just inside of the housing. It was easily repaired. Both of the audio transformers had open primary windings so they were rewound.
Thanks to a clue found at this site: http://www.duanesradios.info/html/leutz_model_c_superheterodyne.html
I was able to improve the function of the "IF filter transformer" by adding a .001uf cap to the .00025uf caps on both windings. It looks like this may have been a common problem caused by the confusion created by changing the make and value of the IF transformers several times during this model's production time. That transformer is shown in the video below.
I was able to improve the function of the "IF filter transformer" by adding a .001uf cap to the .00025uf caps on both windings. It looks like this may have been a common problem caused by the confusion created by changing the make and value of the IF transformers several times during this model's production time. That transformer is shown in the video below.
Leutz Model C operational video.
Still a bit of mystery. The radio was built with a 0 - 1.5 amp meter. It was built with General Radio tube sockets for 201A tubes which have a total draw of 2 amps (8 times 1/4). The ads for the radio claim that it could be built to use almost all of the common tubes that were available at the time. It is possible that the radio had been built for 199 type tubes using an adaptor base.
Still a bit of mystery. The radio was built with a 0 - 1.5 amp meter. It was built with General Radio tube sockets for 201A tubes which have a total draw of 2 amps (8 times 1/4). The ads for the radio claim that it could be built to use almost all of the common tubes that were available at the time. It is possible that the radio had been built for 199 type tubes using an adaptor base.
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