EA3GCY EGV-40, Инструкция по сборке, Страница: 17 / 35

EGV-40 CW QRP Transceiver Page 17
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Pin “headers”
Place and solder pins for “Phone”(2)(H-10), “KEY”(2)(D-6), “VDC”(2)(D-6), “ANT”(2)(A-7), “VXO”(2)(F-5),
and J1 A/B(3)(I-4).
Turn the board over and hold the headers in place with the help of a female jumper while you solder
them avoiding burning your fingers. Use the other hand for the soldering iron and move the board
towards the tin to solder the headers in place. If you have someone to help out, much better!
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Transistors
All of them have their type numbers marked on their body. Place and solder Q1, Q2, Q5, Q6, Q7, Q8,
Q9, Q10 and Q11 following the outline on the silkscreen.
Q3 and Q4 are SMD J310 transistors, and they are factory soldered on the tracks side of the PCB.
DO NOT INSTALL Q12 now (TX power amplifier).
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Integrated Circuits
The outline on the board for the ICs has a “U” notch on one end, indicating the pin 1 end of the IC. There
is also a notch on one end of the sockets. This end goes over the “U” notch outline on the board. Finally,
pin 1 of the IC is marked with a round dimple or dot; this end of IC will go towards the notch on the
socket or “U” on the outline.
Install sockets for IC1, IC2, IC3, and IC6 on their PCB locations. Make sure that all sockets lie flat
against the board. Next, insert IC1, IC2, IC3, and IC6 on their sockets.
IMPORTANT: Make sure that all IC’s are fully inserted on their sockets, push them if need be. It is a
good idea to clean or scratch the legs of the chips prior to their insertion on their sockets. If contact fails
in the sockets it may cause a malfunction of the rig.
Now, place the voltage regulators IC4, IC5, and IC7, following the outline of the silkscreen.