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參數(shù)資料
| 型號(hào)： | DF100LB80 |
| 廠商： | Sanrex Corporation |
| 英文描述： | DIODE(THREE PHASES BRIDGE TYPE) |
| 中文描述： | 二極管（三相橋型） |
| 文件頁數(shù)： | 4/4頁 |
| 文件大?。?/td> | 65K |
| 代理商： | DF100LB80 |
NARC DF100 Aerial Switcher
IC1
NE555N
Timer IC
R3
470R
R4
470R
R6
470R
R5
470R
C6
1nF
1N916
1N916
C1
10nF
C2
10nF
1
5
6
2
7
8
4
3
R1
1K
R2
100
K
Dipole 1
Dipole 2
C3
1nF
C4
1nF
C5
1nF
To
Receiver
DF
OFF
Monitor
Monitor
DF
OFF
9 Volt
‘PP3’ type
Battery
G3HUL Test Beacon
R4
470R
C3
68pF
R2
10K
R3
4K7
C4
10nF
R1
560R
C1
100pF
L1
(10t)
L2
(6t)
C2
100pF
TR1
BSX20
Xtal 1
12MHz
9 Volt
‘PP3’ type
Battery
This is the circuit diagram for a simple Test beacon suitable for testing the DF100. Please note
that Construction details and Technical support are not included!
For more information see Doug Mallett G3HUL.
4
Basic circuit description:
Power is provided by a PP3 9 volt battery switched via a 2 pole 3 position toggle switch wired
so that in either top or bottom positions power is connected. IC1 is a 555 Timer IC wired in
astable configuration as a square wave oscillator with frequency and mark space ratio
defined by R1/R2/C1/C2. The output from pin 3 is fed, via the switch in ‘DF position’ to a
network of 2 diode switches which are connected to the 2 Dipoles. The diode networks are
alternately switched (reverse biased) by the square wave output of the 555 so that the signals
from two matched dipoles are alternately passed to the output to receiver
The ‘Mon’ switch position simply connects a positive voltage from the battery to switch one of
the dipoles only on all of the time in order that one of the dipoles can act as a normal aerial in
order to monitor normal audio transmissions.
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