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SR2 – 21
4. Turn ON the receiver.
After adjusting the volume to a pleasant level, you should hear some
shortwave stations by turning the Tune Control, no matter how any of the
adjustable coils happen to be set.
While listening to any kind of station, whether broadcast or Teletype, etc.,
use a small screwdriver to adjust the slugs in transformers T1 and T2 for the
best-sounding reception.
The Tuning Control covers varying segments of the bands selected by
adjustment of oscillator coil T3. Adjustment of T3 anywhere between the full
In
position to the full Out position will give the user full range between the
minimum and maximum frequency coverage set by C15 and C16.
Both T1 and T2 must be adjusted with a non-metallic alignment tool such as
is used in radio-TV service. If you do not have one, a suitable tool can be
made by patiently sanding a screwdriver-like blade on the end of a wooden
match stick, kabob skewer or small plastic crochet needle. Again, please be
aware that a metal screwdriver blade will drastically increase the coil
inductance and make adjustment quite difficult. T1 and T2 are simply
adjusted for strongest reception of any signal range that is tuned in.
If you are without any kind of testing or frequency reference equipment
whatsoever, the easiest way to start enjoying your SR2 is, with the Tune
control set at its midpoint, slowly tune T3 with your alignment tool as though
it were a tuning dial. Stop when you come into the middle of a group or
cluster of foreign broadcast stations. Try tuning around these stations with
the Tune control. If you like what you hear, readjust both T1 and T2 for best
C16 = .001 T3 Slug In T3 Slug Out
C15 = None 6.5—13.0 MHz 9.0—18.3 MHz
C15 = 47 pF 5.1—7.9 MHz 7.1—10.7 MHz
C15 = 100 pF 4.3—5.3 MHz 6.0—8.3 MHz
C16 = 100 pF T3 Slug In T3 Slug Out
C15 = None 8.4—14.2 MHz 11.5—19.5 MHz
C15 = 47 pF 6.0—8.1 MHz 8.5—11.0 MHz
C15 = 100 pF 4.9—6.3 MHz 6.7—8.4 MHz