Elecraft K1 User Manual

Page 27

LECRAFT

Locate a 2-D fastener and hold it vertically (Figure 6-3a).

Looking at a side with two holes, note that the holes are offset
from the center. The PC board outlines for the 2-D fasteners have
a matching offset, which will aid in installing them in the next step.

Holes offset

from center

(a)

(b)

Figure 6-3

Install 2-D fasteners at the four locations indicated in Figure

6-2, on the bottom of the RF board. Secure each fastener from the
top side of the board with 3/16" (4.8 mm) pan-head screws and #4
split lock washers (Figure 6-3b).

Make sure that the 2-D fasteners line up with the edges of the

PC board and do not hang over. If they hang over or do not match
their component outlines, they are installed backwards.

Install relay K1, near the center of the board. Make sure the

pin 1 end (with the heavy line) is oriented as indicated by K1’s
component outline. Do not bend or trim the relay leads.

In the steps that follow you’ll install the connectors that

mate with the Filter and Front Panel boards. These connectors
must be installed properly to ensure reliable mechanical connection.
They are difficult to remove once installed, so follow all
instructions carefully. Review Figure 3-3 before proceeding.

Install an 8-pin female connector at J6, on the top side of the

RF board. It must be flush with the board and not tilted (Figure 6-4).
Solder just one pin near the center of J6.

Figure 6-4

If J6 does not appear to be completely flush with the board, or

it is tilted, re-heat the soldered pin and press down. Do not solder
the remaining pins yet.

Install J7 and J8 in the same manner as J6, soldering just one

pin in each case.

The Filter board can now be used to check for proper

installation of the three 8-pin connectors. Place the Filter board
above the connectors (do not plug it in). Verify that all pins of P1,
2, and 3 on the Filter board align with the corresponding holes of
J6, 7 and 8 on the RF board.

Remove the Filter board. Solder all remaining pins of J6, 7,

and 8 on the bottom of the RF board.