DRAKE R-4A Dokumentacja Pobierz pdf (Strona 13)

SIDE CONTROLS

JACKS

S-METER ZERO

This control is the front-most adjustment on the

right side of the R-4A chassis and is for the purpose of setting

the S-meter needle to S-l under no signal conditions.

NOTCH ADJ.

The NOTCH ADJ. control located on the right side

of the chassis is a balancing device whichdetermines the amount

of attenuation obtained with the T-notch filter. This control needs

to be set very rarely.

For the proper adjustment, see operating

instructions .

XTAL/VFO

SWITCH

This switch, located on the left side of the

chassis, allows the operator to select between normal VFO operation

or crystal control, using a crystal plugged into the CRYSTAL LOCK

SOCKET.

CRYSTAL LOCK SOCKET

The R-4A may be crystal locked to a

specific frequency by installing a crystal of the required frequency

in this socket and setting the

XTAL/VFO

SWITCH to the XTAL

position.

For details. see “Fixed Frequency Operation” in the

operation instructions. THIS SWITCH MUST

FOR NORMAL OPERATION.

BE IN THE VFO POSITION

Figure

REAR VIEW

-12-

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 38 39

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DRAKE R-4A Dokumentacja Strona 13