Kenwood TS-780 User Manual

TS-780 SPECIFICATIONS

GENERAL

Frequency Range.. .....................................

.144.0~ 1 4 6 . 0 M H z

4 3 0 . 0 ~

4 4 0 . 0 M H z

Mode ........................................................

SSB (USB, LSB), CW, FM

Antenna impedance ..................................

..5 0

(144 MHz, 4 3 0 M H z )

Voltage Requirements ................................

..22 0 V AC, 50/60. Hz

1 3 . 8 V

Power Consumption ....................................

Receive (no Signal): 45 Watts (220 V AC), 1.2 A (13.8 V DC)

Transmit: 130 Watts (220 V AC), 5 A (1 3.8 V DC)

Backup current (Battery) ............................

..Les s than 10 yA

Semiconductor Complement..

.....................

..Transistors:

1 4 9

FETs:

3 5

ICs:

Diodes:

1 9 5

Dimensions.. .............................................

.290 (W)

124 (H)

322 (D) m m

(1 1 “-7/16)x (4”.7/8)x (12”-5/8)

W e i g h t . . ...................................................

. l O . l

kg (22.2 Ibs)

TRANSMITTER SECTION

RF Power Output ........................................

SSB, CW, FM:

1 0 Watts

FM (LOW):

Approx. 1 watt

Modulation

...............................................

.SSB:

Balanced modulation

FM:

Variable reactance frequency shift

Maximum frequency deviation (FM) ...............

5 kHz

Carrier Suppression .....................................

Better than 4 0 dB

Unwanted Sideband Suppression ..................

.Better than 40 dB

Spurious Radiation ....................................

..Bette r than - 60 dB

Microphone

Impedance

...............................

,500 ~

600

AF Response of Transmitter (SSB) ................

.400~ 2600 Hz (- 9 dB)

Repeater Frequency Shift

.............................

600 kHz or + 600 kHz (144.0~ 146.0 MHz)

- 7 . 6 M H z o r - 1 . 6 M H z ( 4 3 0 . 0 - 4 4 0 . 0 MHz)

RPT Tone Frequency

...................................

7 50 Hz

RECEIVER SECTION

Receiver

Sensitivity

....................................

.SSB, CW:

0.2 yV for 10 dB (S + N)/N

FM:

1 yV for 30 dB (S + N)/N

0.2 yV for 12 dB SINAD

Intermediate Frequency ..............................

.l st:

3 0 . 8 6 5

M H z

2 n d : 1 0 . 6 9 5 M H z

3rd: 455 kHz (FM only)

Squelch Sensitivity.. ...................................

.O. 1

6 yV (At threshold)

Audio Output ............................................

.2.0 Watts (with less than 10% distortion) into an 8 ohm load

Receiver

Selectivity

....................................

.SSB, CW:

2 . 2 k H z ( - 6 dB)

4 . 8 k H z (-60 dB)

FM:

1 4 k H z ( - 6 dB)

30 kHz (- 60 dB)

Circuit and ratings are subject to Change without notice for improvement.