Mod-VFO Drehrichtung_en.docx
January 28, 2019, ©
Elcon
, Switzerland
Seite 6 / 7
In this position tighten the grub screw accessible from above.
Turn the tuning knob counterclockwise until you see the second grub screw and can
tighten this one too.
2.3 Functional test
Turn on your transceiver. Set the receiver in the 20m band, USB with "Tune" to maximum
noise in the speaker.
Check by slowly turning the VFO knob whether you can hear the noise over the entire
tuning range without interruption.
If the noise suddenly decreases at any position of the VFO knob, the rotor plates of the
variable capacitor are touching the stator. In this case, check the capacitor carefully with a
magnifying glass.
3
Changing the direction of rotation on the CALIB knob
Turn the unit upside down so that the underside faces upwards.
Solder off the two resistors R14 (1
kΩ) and R15 (3.3kΩ) from the CALIB potentiometer
VR6 (5kΩ), see Figure 7 .
Figure 7
S
older the two resistors R14 (1kΩ) and R15 (3.3kΩ) in the swapped positions to the
CALIB potentiometer VR6 (5kΩ), see Figure 8
Figure 8
