Ukw. E. e 1941 RESTORATION WORK
 

This receiver arrived in excellent condition and included a copy of the original manual. The seller warned me of a fractured capacitor that was located on the bottom of the radio, and included a photo of the broken capacitor. The exterior paint and interior state of the radio were near mint, as if this receiver had not been used during the war.

When I performed a physical inspection of the radio, I found the following potential defects / deviations:

  1. The capacitor marked 103 was broken on the bottom of the radio.
  2. The resistor marked 108 was damaged next to the transformer at the top of the radio. One of its connecting heads was detached from the body.
  3. On the rear of the radio on a connecting panel, many connecting screws were loose that connected various wires from different parts of the radio.
  4. A screw that held down the transformer had broken.
  5. After testing all vacuum tubes, I found one to be defective
  6. The frequency scale illumination light burned out with the immediate application of 12.6 Volt power. There was a bright-blue flash when this happened.
  7. The two box-capacitors on the right side of the radio were degraded (as they mostly are after all these years).

My repairs to the Ukw. E. e are listed below:

  1. The broken capacitor was replaced with a modern capacitor with the same characteristics. It was wrapped in electrical insulation to simulate the look of the original capacitor, with the correct writing placed on it with a special pen.
  2. Since all of the integral parts of resistor 108 were intact, I used heat (soldering iron) and pressure (pliers) to reattach the head to the body successfully. The Ohmmeter read the correct resistance after this.
  3. The connecting panel screws were taken apart, cleaned, and reconnected.
  4. The broken transformer screw was successfully replaced.
  5. I replaced the broken vacuum tube.
  6. I replaced the Tungsram light above the frequency scale with a new light with the same characteristics.
  7. I emptied the box capacitors of their original electrolytic material, and placed new, equivalent capacitors inside. Then I soldered their ends to the top of the box capacitor cases, and placed them back into the radio - looks perfect, and works the same.

When I tested the receiver with a signal generator, the selectivity and sensitivity were perfect. There was almost no deviation on the frequency scale from the correct frequency for the maximum signal received. Looks like all of the damage to this receiver was due to it sitting on the shelf for 60+ years.

 

 

 

The broken capacitor (50,000 pF - 250-750 Volt)

 

 

The new capacitor made to look like the original one.

 

 

The disconnected resistor 108 cap.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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