Ramsey Electronics FX-440 Manual page 58

PA:RT
~~i !
111
VALUE
or
ID
F20,21
F20
F20
U: INTEGRATED CIRCUITS:
A1
[ l [ l
MSA0304
U1
1111
MC3335
U2
LM380
U3 UPB569
U4
111 l
LM324
us
LM358
U6 !
111
MC145152
U7 74HC283
U8 74HC283
U9
I l I l
74HC283
U10
I I I I
74HC283
V: VOLTAGE REGULATORS:
VR1
1111
7808
VR2 7805
Y: CRYSTALS:
Y1
1111
21.855 MHz
Y2 12.80 MHz
MISCEUANEOUS:
3
I l I l
Cable ties
3
! l ! l
4-40
x
V4 •
screw
3
4-40 nut
2 Solder lug
4
I 11 l
Ferrite bead
1
Y4
x 20 bolt
Ref. 56
STEP
NOTE:
VCO control voltage
VCO output frequency
U3 prescaler output
F7 MMIC VCO Buffer
CR1 FM dual-conversion receiver
81 Receiver audio amplifier
F20 Dual-modulus+ 64/65 prescaler
M17 Quad op amp: mic and PTI
G7 Dual op amp: see PLL theory
G1,G40 PLL Frequency Synthesizer
G13 4-bit high speed binary Adder
G14
. .
G15
G16
A9 +8VDC where needed
A10 +SVDC where needed
CR23 Receiver IF oscillator
G2
PLL reference oscillator
General wiring
Used with L9,10,18,19
For winding coils
FX-440