R-113: power supply & converter operation

The power supply is built around a small transformer that produces 110 Volts AC and 12.6 Volts at 0.5 Amperes.
The circuit and construction process of the power supply are shown below.(Click on images to enlarge).



The R-113 is connected to its power supply by means of an 8 positions screw-type terminal strip, and a six-wire extension cable.
It must be noted that all original wires of the R-113 are used, and NO modern plastic-covered wires enter the converter or even touch the R-113.

Finally the R-113 IF output is connected to the little BC band, Lincoln Receiver, by meas of a short lenght of RG 59U cable. The completed converter and its provisional operating position are shown on fotos:(Click on images to enlarge)

Operation of the R-113

First, connect the output of the R-113 to the antenna input of a BC band receiver by means of a short length of RG-59U (Less than a Meter). Second, with the R-113 OFF, find a clear spot near or at the 1000 KHz. mark in the BC receiver.
Third, turn the R-113 ON by means of the lower knob. This knob operates the mode switch.
The first position of this switch is the ON/OFF. Its second position is the first SW Band (SW1), and its third position is is the second SW Band (SW2).
Now you are ready to operate this gem!

Turn to the SW2. If it is daytime or early evening, search for stations from about the 30 meter mark to the 20 meter mark. Read on the RED SCALE!
If it is night time, search stations from about the 61 meter mark to the 36 meter mark. Read on the RED SCALE!
Band SW1 is only a night time band. Read on the BLACK SCALE!
SW2 tunes from about 4,6 MHz to about 12,4 MHz. Read on the RED SCALE.
SW1 tunes from about 1,55 MHz to about 4,1 MHz. Read on the BLACK SCALE.
Turn the dial knob very slowly and enjoy shortwave listenning 1931 style!!!