Download DEGEN DE1103: Correcting the errors

Compare the
initial filter
characteristic...
...and after the
modification:
The instrument divisions are 10 MHz along horizontal and 10 dB on the vertical line.
More details about the new filter characteristics will be provided later, in the
measurement section.
Direct volume and frequency control in SSB mode
This modification converts the FINE control knob into a volume control knob, and
converts the VOL knob into the SSB frequency fine tuning knob (tuning knob + pressing
VOL).
Requirements:
- one small 3.3k resistor (possible 3,0 k or 3,6 k),
- thin insulated installation wire (MGTF type, etc.).
1. Cut the PCB traces on the face side of the PCB in the places, shown in the
photographs.
2. On the back side of the PCB use a short piece of insulated wire to connect the left
output of resistor R706 to one of the connector pins (second pin from the top right).