Apparatuur informatie

Kenwood TK-780 Transceiver
Fabrikant:
Kenwood
Model: TK-780
Datum: 2001
Categorie: Radio, Communicatie
Groep: Transceiver
Beschrijving: VHF FM TRANSCEIVER
Informatie:
                                    GENERAL
Frequency Range ................................ K,HK : 146
to 174MHz K2,HK2 : 136 to 162MHz
Number of Channels ........................... Maximum 600
channels (LTR model), Maximum 250 channels (Conventional model)
Channel Spacing ................................. Wide :
25/30kHz, Narrow : 12.5/15kHz (PLL channel step 2.5, 5,
6.25, 7.5kHz)
Input Voltage ....................................... 13.6V
DC negative ground
Current Drain ...................................... 0.4A on
standby
1.0A on receive
TK-780 : 8A on transmit TK-780H : 12A on transmit
Temperature Range ............................ –30°C to
+60°C (–22°F to +140°F)
Dimensions & Weight ........................ TK-780 : 140
(5.51) W x 40 (1.58) H x 145 (5.73) D mm (inch), 0.94kg
(2.07 lbs)
TK-780H : 140 (5.51) W x 40 (1.58) H x 173 (6.84) D mm
(inch), 1.05kg (2.31 lbs)
RECEIVER (Measurements made per EIA standard EIA/TIA-204-D)
RF Input Impedance ........................... 50Ω
Sensitivity (EIA 12dB SINAD) ............. 0.25μV
Selectivity ........................................... Wide
: 80dB Narrow : 70dB
Intermodulation................................... Wide :
75dB Narrow : 65dB
Spurious and Image Rejection............ 90dB
Audio Power Output ........................... 4W at 4Ω less
than 5% distortion
Frequency Stability ............................. ±2.5ppm
from –30°C to +60°C
Channel Frequency Spread ................ K,HK : 28MHz
K2,HK2 : 26MHz
TRANSMITTER (Measurements made per EIA standard EIA-152-C)
RF Power Output ................................ TK-780 :
25W TK-780H : 45W
Spurious and Harmonics..................... 70dB
Modulation .......................................... Wide :
16K0F3E Narrow : 11K0F3E
FM Noise ............................................ Wide :
50dB Narrow : 45dB
Microphone Impedance...................... 600Ω
Audio Distortion .................................. Wide :
Less than 3% Narrow : Less than 5%
Frequency Stability ............................. ±2.5ppm
from –30°C to +60°C
Channel Frequency Spread ................ K,HK : 28MHz
K2,HK2 : 26MHz

Deze handboeken zijn beschikbaar voor de bovengenoemde apparatuur:

Kenwood -- TK-780 -- Servicehandboek Extension
Bestandsnaam: Kenwood-8279-Manual-Page-1-Picture
Manueel de Type: Servicehandboek Extension
Pagina 's: 69
Grootte: 3.94 Mbytes (4130838 Bytes)
Taal: Engels
Herziening:
Handleiding-ID/Number: B51-8581-00 (N) 1370
Datum: 01 mei 2001
Kwaliteit: Elektronisch document, geen scan, zeer goed leesbaar.
Uploaden datum:
MD5: 8e473f9feb3b6c5f4cf15a31a1fe7dad
Downloads: 50 Sinds 01 januari 2017
Informatie:
This service manual applied to products with 30200001 or
subsequent serial numbers.
In terms of the products with the serial numbers earier than
30200001, refer to the TK-780/H
service manual as per part No. B51-8461-10.

GENERAL
.................................................................
2
OPERATING FEATURES ......................................... 3
REALIGNMENT......................................................
15
INSTALLATION......................................................
20
CIRCUIT DESCRIPTION......................................... 28
SEMICONDUCTOR DATA..................................... 33
DESCRIPTION OF COMPONENTS ....................... 35
PARTS
LIST............................................................
37
EXPLODED VIEW
.................................................. 47
PACKING
................................................................
48
ADJUSTMENT
....................................................... 49
PC BOARD VIEWS
PLL/VCO (X58-4540-11) : K2,HK2 .................... 57
PLL/VCO (X58-4712-70) : K,HK ........................ 58
TX-RX UNIT (X57-6480-XX) (A/2) ................... 59
TX-RX UNIT (X57-6480-XX) (B/2).................... 65
SCHEMATIC DIAGRAM ........................................ 69
BLOCK
DIAGRAM.................................................. 77
LEVEL
DIAGRAM................................................... 80
TERMINAL FUNCTION ......................................... 82
SPECIFICATIONS...................................................
83
Kenwood-8279-Manual-Page-1-Picture
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