RUSS' OLD RADIOS
  • HOME
  • FOR SALE
    • CURRENTLY AVAILABLE
    • DO IT YOURSELF SPECIALS
    • EXCEPTIONAL DEALS
    • WITH MP3 PORTS
  • RESTORATION
  • BLOG
  • BEFORE/AFTER
  • CONTACT US
  • UNIQUE RADIOS
  • 1920'S Superheterodyne

Leutz Model C  with Model K Antenna Adaptor a Super - Superheterodyne

1/30/2016

0 Comments

 
Picture
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.
Picture
The model K antenna adaptor on the left, above, allows the use of a long wire antenna and ground rather than a loop antenna.
Picture
This is the model K removed from its cabinet..
Picture
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.
Picture
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.
Picture
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.
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.  
0 Comments



Leave a Reply.

    Author

                         Russ Webb

    Picture
    Russ Webb & Fuzzy

    Best Buddy, Radio fixer







    Categories

    All
    All
    Antiques
    Electronics
    Radios
    Repair
    Restoration
    Travels
    Vintage

    RSS Feed

    Archives

    March 2023
    November 2022
    October 2022
    July 2022
    January 2022
    December 2021
    September 2021
    June 2021
    April 2021
    February 2021
    January 2021
    November 2020
    July 2020
    June 2020
    April 2020
    March 2020
    December 2019
    October 2019
    May 2019
    April 2019
    March 2019
    February 2019
    January 2019
    December 2018
    November 2018
    October 2018
    September 2018
    June 2018
    April 2018
    March 2018
    February 2018
    January 2018
    December 2017
    November 2017
    September 2017
    June 2017
    May 2017
    April 2017
    February 2017
    December 2016
    November 2016
    October 2016
    September 2016
    August 2016
    July 2016
    June 2016
    May 2016
    April 2016
    March 2016
    February 2016
    January 2016
    December 2015
    November 2015
    August 2015
    June 2015
    May 2015
    April 2015
    March 2015
    February 2015
    January 2015
    December 2014
    November 2014
    October 2014
    September 2014
    August 2014
    July 2014
    June 2014
    May 2014
    April 2014
    March 2014
    February 2014
    January 2014
    December 2013

CUSTOM DESIGN BY SUE WEBB  06/2013       Redesigned by Russ Webb     Approved by Fuzzy   Updated:  Pretty much all the time, but I forget to change this date
Proudly powered by Weebly
Photos used under Creative Commons from valart2008, rafeejewell