^11-
Page 47
APPLICATIONS
Although there are many applications
for
your
Solid-State Dip Meter, only a
few
will be described in this
section of the Manual.
APPLICATION
PAGE
-
Receiver
adjustment.
47
-
Transmitter
adjustment.
48
-
Shunt and
series trap
adjustment.
43
-
To
measure the Q
of
a
tuned
circuit.
48
-
To
find an
unknown
capacitor value.
50
-
To
find the
inductance
of RF coils.
51
-
To
find the
inductance
of toroid coils.
51
-
To
check
for parasitic
oscillations.
51
-
Neutralization.
52
-
Use
a
relative field
strength
meter.
52
-
Antennas 53
NOTE: In all
applications, coupling between the
Dip Meter and the test circuit
should be as loose as
possible. That is. keep the
dip meter coil
as
far away
from
the test circuit as
possible and still be able to observe a
useable meter
reading.
RECEIVER ADJUSTMENT
1.
Without power applied
to
the
receiver,
tune
the receiver local oscillator
stage to its approximate frequency,
as you use the Dip Meter in its
injection mode.
2. As
you work toward the antenna, align any doubler
stages to
their
approximate frequencies.
3.
Align the
RF
front end
to
its center frequency.
4.
If the receiver
IF is within the coil-coverage of the Dip Meter,
align the IF
stages.
5. Turn the
receiver on, and prepare the Dip
Meter for
use in the
absorption
mode.
6.
Set the
Meter to the
frequency
corresponding to
the receiver
oscillator-multiplier
stages. Then adjust
these stages
for
a
maximum meter
reading. Be sure to
keep the
coupling loose.
7. Set the
Dip
Meter frequency to the center frequency of the receiver
bandspread.
8.
Place the dip meter coil (wrapped with a short
antenna) near the receiver
antenna; this injects
a
signal. If the output
of
the Dip Meter is too strong,
move it
further from
the
antenna. NOTE: Keep the Dip Meter away
from
large
surface
areas
of metal
to
avoid detuning its oscillator circuit.
9. Tune
receiver stages for desired
performance.
10.
Lightly
tap
the dip meter case;
this will
generate
microphonics you
can
hear
at the
receiver output.
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