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|
1209 |
1336 |
1477 |
1633 |
|
|
697 |
1 |
2 |
3 |
A |
|
770 |
4 |
5 |
6 |
B |
|
852 |
7 |
8 |
9 |
C |
|
941 |
* |
0 |
# |
D |
|
RA&B |
RC |
TONE |
C1 |
C2 |
|
6810 |
274 |
696.97 |
.1uF |
.01uF |
|
6190 |
169 |
770.05 |
.1uF |
.01uF |
|
5620 |
76.8 |
851.99 |
.1uF |
.01uF |
|
5110 |
10 |
940.68 |
.1uF |
.01uF |
|
3920 |
174 |
1209.2 |
.1uF |
.01uF |
|
3570 |
88.7 |
1336.3 |
.1uF |
.01uF |
|
3240 |
49.9 |
1477 |
.1uF |
.01uF |
|
2940 |
15.8 |
1633.1 |
.1uF |
.01uF |
This table has the values needed to make audio tone oscillators using the LM556 Dual Timer / Oscillator Chip. The resistor values are 1% metal film and the capacitors are 2% polyester capacitors. RC listed above is placed between RA and the power source. The RA and RB resistance values are equal.
The board Layout shown above is for the transmitter above except for the two fet stages of the transmitter.
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