Polyvaricon Capacitance Trimmer Open
Trimmer Closed
Section
Range
Tuning Range
Tuning Range
========= ========= ===========
============
Section-A
4 to 80 pf*
60 Khz
58 KHz
Section-B
5 to 160 pf*
124 Khz
120 KHz
Sections A+B 9 to 240 pf*
155 Khz
147 KHz
Since the IF frequency is 11.0 MHz, the VFO needs to tune 11 MHz below your desired tuning range
on 20 meters (14.000 -11.0 = 3.0 MHz). You can use this method to calculate the frequency of the
VFO for your particular tuning selection.
Illustration 21: *VFO Tuning Capacitor Parameters(K7HKL
Photo)
