DRAKE R-4C Especificaciones descargar pdf (Pagina 6)

SPECIFICATIONS

Frequency Coverage

Accessory Coverage:

Modes of Operation:

SSB, CW, AM, RTTY.

Sensitivity: SSB Mode: 10

signal-plus-noise to noise ratio obtained on 80

M-

10 M amateur bands with less than a 0.25 microvolt signal on the

antenna terminal, on other frequencies less than 0.5 microvolt signal.

Selectivity:

Covers 3.5to 4.0 MHz, 7.0to 7.5

MHz,14.0

14.5MHz,

21.0to

21.5 MHz,and 28.5 to 29.0

MHz.

15 accessory crystal sockets are provided. Coverage of any additional

500 kHz ranges between 1.5 and 30 MHz (except between 5.0 and

6.0 MHz) can be added by installing accessory crystals.

As supplied:

SSB

Mode:2.4kHzat

dB,

4.2kHz

at60dB.

Mode:

8.0

kHzat

dB,28

kHzat

60dB.

With accessory crystal filters:

AM Mode, 2 filters available:

6.0 kHz at6

dB,

10 kHz at 60

dB.

4.0 kHz at6

dB,

7.5 kHz at 60

dB.

1.5,

.5,

.255

Modes, 3 filters available:

1.5 kHz at6

dB,

3.0 kHz at 60

dB.

500 Hz at6

dB,

1000 Hz at 60

dB.

250 Hz at6

dB,

600 Hz at 60

dB.

Stability

After warm up, frequency will not drift more than

100 Hz, includ-

ing voltage variation of

10%.

Calibration:

Better than

1 kHz when calibrated at nearest 100 kHz calibration

point.

Spurious Responses:

Internal spurious response less than the equivalent of a 1 microvolt

antenna signal on all amateur bands.

Image Rejection:

(11.29 MHz above desired): Over 70

below 23 MHz, 60

above

23 MHz.

Input Impedance:

52 Ohms nominal.

Audio Output Impedance:

3.2 Ohms to speaker, or headphones, 3000 Ohms anti

VOX.

Audio Output:

0.7 Watt at AVC threshold, 2 Watts maximum at less than 5% T.H.D.

AGC:

Audio Output increases 3

maximum for a RF input increase of

100

above AGC threshold. AGC threshold typically 1 microvolt.

Attack time: 1 millisecond

Release times: Slow: 1 second

Medium: 350 mSec

Fast: 50 mSec

Power Consumption:

Size:

Weight:

60 Watts, 120/240 Volts AC,

50/60

Hz.

5.5 inches high, 10.75 inches wide, 12.25 inches deep overall.

17 pounds.

1-3

1 2 3 4 5 6 7 8 9 10 11 ... 28 29

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DRAKE R-4C Especificaciones Pagina 6

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