Kenwood TS-780 Specifications, General, Transmitter, Receiver Section, Receiver Sensitivity

i

TS-780

SPECIFICATIONS

i

I

i:

;~-RH*n,,c,--,~~,~,,-,“~,~,,“,~,“~,”~,,,,,-”--”,“~-,“~,~,,.,~,,~,~~~--~~~-,“~~,.,“,,““,,,-‘”H(*~

GENERAL

Frequency

Range

.144.0~ 1 4 6 . 0

MHz

4 3 0 . 0 ~4 4 0 . 0 M H z

Mode

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

SSB (USB, LSB), CW, FM

Antenna

impedance

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

..5 0 9 (144 MHz, 430 MHz)

Voltage

Requirements

..22 0 V AC, 50/60.

Hz

1 3 . 8 V DC&l5%

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:

41

Diodes:

1 9 5

Dimensions

.290

(W)

x 124

(H)

x 322

(D)

mm

(1 1 “-7/16)x

(4”.7/8)x

(12”-5/8)

Weight

. lO . 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)

f 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

Q

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 MHz or - 1 . 6 M H z ( 4 3 0 . 0 - 4 4 0 . 0 MHz)

RPT

Tone

Frequency

1 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 MHz

2nd: 10 . 695 MHz

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 kHz ( - 6 dB)

4 . 8 kHz (-60 dB)

FM:

14 kHz ( - 6 dB)

30 kHz (- 60 dB)

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

2