Elecraft XV Assembly Manual for XV222 - Manual (Page 44)

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XV144 –144 MHz Transverter
Perform the following steps on the RF PCB only if you are building the
XV144 transverter.
Install the resistors listed below.
R24, 120 ohm (brn-red-brn), 1 watt in the lower left quadrant near
U6. Space this resistor about 1/16” (1.5 mm) above the PCB like
you did the 1-watt and 3-watt resistors earlier (See Figure 15).
R28, 1k (brn-blk-red), 1/4 watt, near L7 on the middle left. Place this
resistor directly against the PCB.
R29, 56 ohm (grn-blu-blk), 1/4 watt, in center of PCB.
R6, 470 ohm (yel-vio-brn), 1/4 watt, near the circle for OV1 in the
lower right quadrant of the PCB.
Install Z4, a 56 ohm (grn-blu-blk) 1/4 watt resistor near U2 in the lower
right quadrant.
Install the following capacitors near the circular outline for OV1 in the
lower right quadrant:
__C13, .047 F (473)  __C12, 10 pF (100)
__C14, 33 pF (330)
Install a jumper made from a discarded lead across the solder pads for
L3 near toroidal transformer T1 in the lower right quadrant.
Install the molded inductors listed below:
L2, .1 H (brn-blk-silver) near U1 in the upper left quadrant of
the PCB.
Z3, .1 H (brn-blk-silver) near U6 in the lower left quadrant of
the PCB.
L4, .15 H (brn-grn-silver) near R6 on the right side of the PCB.
Cut the Teflon tubing to a length of 3/8” (8 mm).
Slide the 3/8” (8mm) length of Teflon tubing over the center lead of
transistor Q1 (NTE108).
Install transistor Q1 (NTE108) near the circular outline in the lower
right quadrant so that the Teflon tubing acts as a spacer to hold the
transistor above the PCB. One end of the tubing should contact the
bottom of Q1’s case and the other end should rest against the top of the
PCB (see Figure 32).
Figure 32. Installing Q1 with Teflon Spacer.