DRAKE R-4A Spécifications télécharger pdf (Page 14)

IV OPERATION

A. Preliminary Control Settinqs

For all modes of operation set these controls as follows:

FUNCTION

BAND

XTALS

PRESELECTOR

NOTCH

R.F. Gain

A.F. Gain

Set to desired amateur band (see

“accessory frequency coverage” for

information concerning coverage of

other frequencies)

NORM

Peaked for maximum S meter reading

on operating frequency

Off

Fully clockwise

Comfortable level

Single Sideband or Double Sideband Suppressed Carrier Reception

Set the

Passband

selector lever to 2.4 KC and set the

Passband

knob to the dot at the end of the third line from the top corres-

ponding to the sideband desired.

Set the SSB/CW-AM switch to Slow AVC.

Tune in a station with the main tuning for pleasing audio

characteristics.

If noise is a problem,switch the Function switch to N. B. (see function

switch and noise limiter explanation).

If interference from undesired stations is a problem, adjust the PASS-

BAND selector lever to the 1.2 KC position and readjust the

PASSBAND

knob to the dot at the second line from the top corresponding to the

desired sideband.

A heterodyne from a nearby carrier can be eliminated with the Notch

control. A more detailed description of the use of this control follows

under “Operation of Notch Control.

C . C . W. Reception

Set the

Passband

selector lever to 1.2 KC and set the

Passband

knob to either of the dots at the ends of the second line from the

top.

Set the SSB/CW-AM switch to Slow AVC.

Tune in a station for pleasing audio pitch with the main tuning

knob and readjust the

Passband

knob for maximum S-meter reading.

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DRAKE R-4A Spécifications Page 14

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