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PDF TR-7400A Data sheet ( Hoja de datos )
| Número de pieza | TR-7400A | |
| Descripción | 2m FM Transceiver Manual | |
| Fabricantes | Kenwood | |
| Logotipo |  |
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1 page  
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5 Page 
Table 4 Squelch Active Filter List
Frequency (Hz)
Parts number
88.5
94.8
100.0
103.5
107.2
110.9
114.8
118.8
128.0
127.3
131.8
136.5
141.3
146.2
151.4
156.7
L79-0408-05
L79-0409-05
L79-0410-05
L79-0411-05
L79-0412-05
L79-0413-05
L79-0414-05
L79-0415-05
L79-0416-05
L79-0417-05
L79-0418-05
L79-0419-05
L79-0420-05
L79-0421-05
L79-0422-05
L79-0423-05
Table 5 Tone Burst Oscillator
Module List
Frequency (Hz)
Parts number
1800
1950
2000
2100
21 50
2200
2250
2400
2550
TBM-1800
TBM-1950
TBM-2000
TBM-2100
TBM-2150
TBM-2200
TBM-2250
TBM-2400
TBM-2550
DESCRIPTION
VCT CIRCUIT
The equipment incorporates a VCT circuit at the out-
put side of the transmission mixer to improve spurious
radiation and output levels in the wide range from 144 to
148 MHz. Varicaps D2, 3 and 4 are connected to tuning
coils L11, 12 and 13 through temperature compensation
capacitors. Voltages divided from common 9V (C9) with
R62 and 61 (145.5 MHz), VR61 (144.5 MHz) VR62 (146.5
MHz) and VR63 (147.5 MHz) and switched with the MHz
switch are applied to D2, 3 and 4.
FINAL CIRCUIT
The output of the TX unit iabout 1.4 W, 50-ohm)
load) is amplified to about 10 W (50-ohm load) by 01 of
the PA unit and to about 35 W (50-ohm load) by 02 and
delivered to the ANT terminal by way of an ANT switching
diode and a LPF. To protect the final transistor (02), the
input power to 02 is limited by controlling the collector
voltage of the driver (015 of TX unit and 01 of PA unit)
by detecting SWR of antenna with 03, 10 and 11. When
power is low, the circuit is used to reduce the voltage across
the SB terminal with VR5.
Large aluminum die-cast heat sinks In combination
w~th Motorola transistors, MRF208 and 2N6083, ensure
high reliability.
11 Page | ||
| Páginas | Total 46 Páginas | |
| PDF Descargar | [ Datasheet TR-7400A.PDF ] | |
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