QRPGuys Digital DSB II Transceiver Kit, Инструкция по эксплуатации, Страница: 6 / 16

Page 6 of 16 ft8_II_assy_smd_diode_072020.pdf
Everything else:
[ ] U3 – 7809 Bend the leads at the point
where they narrow. Secure with 4-40 screw
and nut.
[ ] J5, J6, J7 – 5 pins SIP socket. Make sure
these are set square to the board before
soldering more than one pin.
[ ] U2 - 8 pin DIP socket. Note orientation of
notch on socket and match with notch on part
board outline. Make sure all the pins are
sticking out the solder pads before soldering
any!
[ ] J3, J4 – 3.5mm phone jacks
[ ] Q1, Q2, Q4 – BS170 MOSFET Note
orientation of the flat side of part. Make sure it
matches the board outline.
[ ] Q3, Q9 – 2N3904 NPN
[ ] Q5 – 2N3906 PNP
[ ] Q6, Q7, Q8 – These parts require some heat sinking. Therefore, these parts get mounted with
the flat side of the package pressed against the large, tinned pad to the left of the board. Make
“U” shaped pieces of resistor lead clippings to hold the body of the BS170's to the board, using
the small holes on either side of the package.
[ ] D4 – CLEAR LENS RED LED – the short lead goes into hole on flat side of part outline.
[ ] TEST – 2 pin SIP header, short pin end in the board
[ ] V1, V2 – 2K trimmer pots
[ ] J2 – DC power Jack.
[ ] J1 – BNC antenna jack
[ ] T1, T2 – bifilar wound on T37-43 ferrite core
(black).
 Cut 6” length of each color magnet wire
 The two wires can be lightly twisted
together, but this is not necessary
 Wind 5 turns on the core as shown.
 Trim and tin the wire ends . Either scrape or
melt the insulation using a hot iron with a
blob of solder.
 Orientate the common wire ends so they are opposite each other on the core.
 The wires will now be in the proper position for inserting into the board.
Be sure to tin the wire ends before installing. This is a leading cause of failure. Be sure
not to pull the wire thru the hole past where you have it tinned.