Version: 13. Sepe
,m
er 2004
28
[ ] R11
68K
[X] Dr1
left out
[ ] Dr2
22µH SMCC
[ ] Dr3
22µH SMCC
[ ] Dr4
22µH SMCC
[ ] Dr5
22µH SMCC
[ ] Dr6
22µH SMCC
The following transistorsmay easy be damaged by ESD. Dont
forget to discharge yourself, use a potential free soldering
station.
[ ] T1
BF199
The following BF981 transistor has 4 terminals. One of the leads is definite-
ly longer than the rest. This should put into the hole marked with a dot on
the pc board.
The leads are bent carefully a little away from the printed
side, taken extreme care of static precautions!
When the transistor is in
place, the marking should be readable.
[ ] T2
BF981
BEWARE: Risk of mixing up BA479 / 1N4148. Use a magnifier!
!!
[ ] D1
BA479
[ ] D2
BA479
[ ] D5
BA479
[ ] D6
BA479
[ ] D4
1N4148
[ ] Q1
Bandsetting Quarz
(11 MHz for the 40m Module)
The varactor diodes following next
can have different housings depen-
ding on what we get from our sup-
plier. The standard look like the
normal 1N4148 have seen a lot of.
The other form is rectagular with very
short leads. The cathode side is
marked with a band or a dot. The short leads are just long enough to con-
tact the corresponding holes in the PCB, but long enough to go through
the holes. Because our PCBs are throughplated that does not make any
problem. Just solder the Diodes to the upper side of the hole. The picture
shows this special type of diode.
[ ] D3
BB109G/BB409 or the like
[ ] D7
BB109G /BB409 or the like
[ ] D8
BB109G /BB409 or the like
[ ] D9
BB109G /BB409 or the like
[ ] D10
BB109G /BB409 or the like
We have done toroids before. On the band module we use iron carbonyl
rings, which are colour coded by type. L1 is wound on a 0.37 inch type 6
ring, which is yellow. (T37-6)
As already tried on the transformers, we
will begin by noting the winding geometry.
The primary of L1 has the cold end lower
left (seen from the upper side of the pc
board) at point 3, and ends at the upper
right at point 1.
Use 0.3 mm lacquered copper wire (AWG
28) and begin at the cold end. Twist an
end after 4 turns (counted on the inner
side), to form the tap. Wind a further 19
turns (giving a total of 23 turns with a tap
at turn 4 from the cold end).
Mount it according to the placement dia-
gram.
[ ] L1
Amidon T37-6
Both band filter coils have a secondary. This
