Elecraft K1 - Manual (Page 13)

12
E
LECRAFT
Install the capacitors listed below. The list shows the
capacitance value, followed by the labeling (in parentheses). After
installing each capacitor, bend the leads outward at about a 45-
degree angle to hold it in place until it is soldered and trimmed.
__ C29, .001 (102) __ C30, .001 (102) __ C27, .047 (473)
Place a bookmark at this page, and another at the
Per-Band Components table in Appendix A.
Locate the two bags of per-band components, which are
labeled by band, e.g. "40m" or "K1B40" (40 meters).
Under Reference Designators in the Per-Band Components
table, there are Band 1 and Band 2 columns. Fill in the blanks at
the top with your two bands (e.g., "40" and "20"). The lower-
frequency band should be designated as Band 1.
Using strips of paper, or labels with a light adhesive such as
“post-its,” temporarily cover the band 2 reference designators
column. Similarly, cover all of the components columns except the
column associated with band 1. This is a very important step
that will eliminate possible confusion during assembly.
Open the bag of components for band 1 only, setting the
band 2 components aside for now.
i
The leads on small capacitors may be pre-formed so that
the capacitor sits slightly above the board when inserted; this will
not affect performance. The leads are also somewhat fragile.
Install the capacitors for band 1, using the reference
designators and values from the appropriate columns in the parts
list. For example, if band 1 is 40 meters, install 390-pF capacitors
at C1 and C5, then 330 pF capacitors at C2 and C4, etc. Double-
check each capacitor value as it is installed. Do not solder yet.
Solder all of the band 1 capacitors.
At this point you’ll need to choose whether to set up the VFO
for 80-kHz or 150-kHz coverage (approx.). The smaller range
covers the most-used portion of every band, provides smoother
tuning, and is strongly recommended if you plan to upgrade to the
four-band module (KFL1-4), which has narrower band-pass filters.
Record your VFO range selection here for reference:
___ 80 kHz ___ 150 kHz
Note: Two different crystals are supplied for 30 meters,
corresponding to two different lower band edges. Which one to use
depends on your selected VFO range (see below). In the following
steps you’ll select one of the two crystals when applicable.
Band VFO Range Crystal Band Edge
80 kHz 18.100 10.100
30 Meters
150 kHz 18.000 10.000
If band 1 is 30 meters, select the appropriate crystal using the
table above. Save the other crystal for possible future use.
Install the band 1 crystal at X1 on the filter board (to the right
of X2), bending the leads to hold it in place. Make sure the crystal is
seated correctly, then solder. Use a minimum amount of solder to
avoid a short under the can.
Move the strips of paper or labels that you used earlier so that
they cover the band 1 reference designators column, and all of the
components columns except the column associated with band 2.
Open the components bag for band 2. Install the band 2
capacitors, using the reference designators and values from the
appropriate columns as before. (Example: if band 2 is 20 meters,
you'll install 180-pF capacitors at C6 and C10, etc.)
Locate the band 2 crystal and verify that it is the correct
frequency. If band 2 is 30 meters, select one of the two crystals
supplied (see table above). Install it at X2 and solder.