Version: 13. Sepe
,m
er 2004
18
Building Group 5, Carrier Oscillator and Switches
The Neosid coil, used in this group is completely different from the known
Neosid cylinder coils. Here we are
using a so called BOBIN coil. The
kernel is made from ferrite mate-
rial, which is looking like a reel.
The windings on this kernel are
not brought on, turn for turn, but
simply winded as are. The only
importance is the right number of
windings.
1=Shield Can 2= Guidance from Plastic 3 Kernel
4= Coilbody 5= Socket
Take the socket of the Bobin and put a little drop of Super glue between
the kernelholders and press carefully the Ferrit bobbin into the holders.
Wait until the glue is dry before continuing the work. You are free to solder
other parts in the meantime.
Caution! IC12 is sensitive against static charging. Discharge
yourself before rolling the part.
[ ] IC12
4066 DIL14
D2
PT6 we already knows. These are the little black trim-potentiometers
[ ]P71K
PT6 lying
B2
Spectrol 75H are precision-trim-potentiometers in a metal case.
Caution, first compare the three terminals exactly with the
respective holes on the pc board. The trim-potentiometers are
gliding very easy into the holes, if they are mounted right. If
you need pressure, they are mounted the wrong way!
[ ] P8
10K Spectrol 75H
D2
[ ] P9
10K Spectrol 75H
D1
[ ] P11
10K Spectrol 75H
D2
[ ] P10
10K Spectrol 75H
D1
[ ] D29
BB109G / BB409 or equivalent
C1
[ ] D30
BB109G / BB409 or equivalent
C1
The following transistors are mounted according to the place-
ment diagram. Caution! they are sensitive against static char-
ging. Discharge yourself before rolling the part.
[ ] T20
BF199
B2
[ ] T21
BS250 MOS beware of static!
E2
[ ] T22
BS250 MOS beware of static!
E2
The crystal is mounted with the help of two cut off resistor leads.
[ ] Q6
8,000MHz HC18
B1
[ ] Q7
8,000MHz HC18
B1
[ ] R89
47K
B2
[ ] R90
47K
B2
[ ] R91
68k
C1
[ ] R92
39K
C/D2
[ ] R93
39K
D2
[ ] R94
39K
D/E2
[ ] R95
100K
D1/2
[ ] C97
1nF
102
B3
[ ] C119
22nF
223
A/B2
[ ] C120
330pF
331 or n33
B2
[ ] C121
220pF
221 or n22
B2
[ ] C122
10nF
103
C1/2
[ ] C123
100nF
104
C2
Now the coil form should be glued properly, and the coil can be wound.
The picture shows the coil from below. Start at pin „anfang“, by twisting
the 0.1 mm wire three times around the pin, and then through the notch
