Elecraft XV Assembly Manual for XV222 - Manual (Page 43)

- 40 -
Install R28, 1k (brn-blk-red), 1/4 watt, near L7 on the left center of the
PCB.
Install a jumper across the solder pads at W1 near the notch and
electrolytic capacitor C60 on the left side of the PCB.
Wind L10 with 6 turns of #22 enameled wire on the T44-6 (yellow) core
as shown in Figure 30. Strip and tin the wires like you did for T1.
REMOVE INSULATION
UP TO THE CORE
THIS LEAD PASSES
OVER FRONT OF
CORE
Figure 30. Winding Inductor L10.
Install L10 within the square outline near the upper left corner of the
PCB with the leads through the solder pads at the corners of the outline and
the toroid sitting upright against the PCB diagonally across the square
outline.
Unscrew and remove the tuning slug from L1, the larger gray variable
inductor. The tuning slug will not be used.
i
If you are not wearing a grounded antistatic wrist strap, touch an
unpainted, grounded object before performing the next step. Once the
temporary jumper across L1 is removed, Q3 is particularly sensitive to
electrostatic discharge (ESD) damage until inductor L1 is soldered in
place.
Remove the temporary jumper and install L1 next to trimmer capacitor
C1 in the upper left quadrant. Be sure the plastic frame of the inductor is
resting against the PCB.
Unscrew and remove the tuning slug from L11, the blue variable
inductor. The tuning slug will not be used.
Install L11 near the upper left corner of the PCB. Be sure the plastic
frame of the inductor is resting against the PCB.
Locate the shielded inductors with gray inserts provided for L12,
L13 and L14. Prepare the inductors for installation as follows:
Use the inductor alignment tool to exercise the core in each
inductor. If the alignment tool fits tightly, insert it from the
bottom to avoid pushing the inductor out of the shield. Run the
core up and down through the coil to ensure it runs smoothly
(some inductors are very stiff at first) then position the core near
the top of the coil.
Check the two leads and the two tabs on the case of each
inductor. If they are bent, straighten them using long nose pliers.
Install the RF Bandpass Filter inductors in the lower right quadrant
of the PCB:
__L12 __L13 __L14
Locate the male RCA plug. Solder a jumper between the center pin
and the shield. This plug will be used during the alignment procedures.
Carefully inspect the bottom of the PCB for the following:
All component leads are soldered. Be especially careful when
checking relays and other components with several leads to
ensure that all the leads are soldered. There will be some
component locations on the PCB that are not filled. This is
normal. The same RF PCB is used for the XV50, XV144 and
XV222 transverters, and some components are specific to each
band.
All component leads are clipped at least as short as the relay
pins. Do not cut the relay pins.
This finishes Part II of the RF PCB Assembly. Proceed directly to RF
PCB Assembly Part III.