Relative Q - Heathkit HD-1250 Manual

I
1
1N34
-
270
TO
|
P"
1000 PF
J
VTVM
RF PROBE
SOLID
STATE
IP
METER
HEATHK1T
no-mo
Figure 3-1
NOTE: The
result of
the readings
can be plotted
on
a
graph
similar
to that
shown
in
Figure 3-2.
7.
Calculate the
Q
of the circuit using
the following formula:
F
0
Q =
F
2
-F,
Relative
Q
The
Relative
Q
of
a
circuit
may
be determined
by
observing the indication of the
Meter
when
it is
used
in
the injection
mode.
As you
observe the dip in
the
meter
pointer, a
sharp dip and
rise at
resonance
indicates a circuit
having
a
relatively high
Q.
A
broad, shallow dip
in
the meter
indication indicates
a
relatively
low Q.
70.7%
OF
PEAK VALUE
FREQ.