MODEL
F R E Q U E N C Y
S Y N T H E S I Z E R
FS-4
INSTRUCTION MANUAL
R.L. DRAKE COMPANY, MIAMISBURG, OHIO, U.S.A.
LIMITED WARRANTY
R. L. DRAKE COMPANY warrants to the original purchaser
that this product shall be free from defects in material (except
tubes and RF output transistors) or workmanship for ninety
(90) days from the date of originai purchase.
During the warranty period the R. L. DRAKE COMPANY
or an authorized Drake service facility will provide free of
charge both parts (except tubes and RF output transistors)
and labor necessary to correct defects in material or
workmanship.
To obtain such warranty service, the original purchaser
must:
(1) Complete and send in the Warranty Registration Card.
(2) Notify R. L. DRAKE COMPANY or its nearest authorized
service facility, as soon as possible after discovery of a
possible defect,
(a) The model number and serial number, if any;
(b) The identlty of the seller and the approximate
date of purchase;
(c) A detailed description of the problem, including
details on the electrical connection to associated
equipment and the list of such equipment.
(3) Deliver the product to the R. L. DRAKE COMPANY or the
nearest authorized service facility, or ship the same in its
original container or equivalent, fully insured and
shipping charges prepaid.
Correct maintenance, repair and use are important to obtain
proper performance from this product. Therefore, carefully
read the Instruction Manual. This warranty does not apply
to any defect that R. L. DRAKE COMPANY determines is
due to:
(1) Improper maintenance or repair, including the installation
of parts or accessories that do not conform to the quality
and specifications of the original parts.
(2) Misuse, abuse, neglect or Improper installation.
(3) Accidental or intentional damage.
All implied warranties, if any, terminate ninety (90) days from
the date of the original purchase.
The foregoing costitutes R. L. DRAKE COMPANY'S entire
obligation with respect to this product, and the original
purchaser and any user or owner shail have no other remedy
and no claim for incidental or consequential damages. Some
states do not allow limitations on how long an implied
warranty lasts or do not allow the exclusion or limitation of
incidental or consequential damages, so the above limitation
and exclusion may not apply to you.
This warranty gives specific legal rights and you may also have
other rights which vary from state to state.
540 Richard Street • Miamisburg, Ohio 45342
R. L. DRAKE COMPANY
CHAPTER I
INTRODUCTION
1-1. GENERAL DESCRIPTION.
The FS-4 is a frequency synthesizer developed for use with the Drake
Company “4” line equipment. (R-4 series, T-4X series and SPR-4.)
The FS-4 plugs into an unused auxiliary crystal socket in the rear of
the receiver or transmitter, and will supply the various injection signals
to the equipment and allows continuous coverage without utilizing the
accessory crystals.
The frequency readout on the FS-4 displays the received frequency
band, and to this is added the frequency readout of the receiver "PTO"
to obtain the correct received frequency.
The FS-4 supplies ali the crystal oscillator injection signals for the R-4
series and T-4X series in 0.5 MHz steps from 11.1 through 40.6 MHz,
and the readout is direct. An accessory kit is available to provide proper
injection signals for the SPR-4 receiver.
The FS-4 can be used with the 2-C type receiver over the frequency
range of 7 to 30 MHz. When used with the 2-C receiver, the FS-4
frequency read-out is not direct, and a correction factor of “7 Mhz” must
be added to the FS-4 readout to obtain the correct operating frequency.
A special accessory kit is necessary to modify the FS-4 for use with the
2-C receiver.
1-2. MANUAL COVERAGE.
This manual is presented in 5 chapters and is arranged for the
convenience of the operator and service technician as follows:
CHAPTER I Introduction. (Self explanatory.)
CHAPTER II Installation. Describes the procedures to be
followed prior to operation.
CHAPTER III Operation. Illustrates and describes front
panel controls, and describes operation with
Drake receiver/transmitter equipment.
CHAPTER IV
CHAPTER V Maintenance. Provides maintenance and
Theory of Operation. Describes all circuits
and networks.
alignment instructions.
CHAPTER II
INSTALLATION
2-1. UNPACKING.
Carefully remove the FS-4 from the shipping carton and examine
it for evidence of damage. If any damage is discovered,
immediately notify the transportation company that delivered the
unit.
NOTE
Fill out the enclosed registration card and return
it to the factory immediately to insure
registration and validation of the warranty.
2-2. LOCATION.
The FS-4 is supplied with a cable approximately 20 inches long
that piugs into the accessory crystal socket of the
receiver/transmitter. This length aliows the user to piace the FS-4
on either side of the receiver/transmitter. Placing the FS-4 on top
of the transmitter is not recommended, due to heat generated
within the transmitter, and the FS-4 will block the air flow.
2-3. POWER REQUIREMENTS.
The FS-4 is shipped from the factory wired for 120 VAC, 50/60
Hz, operation uniess otherwise specified. To operate on 240 VAC
make the proper connections at the transformer on the parent
board as illustrated in figure 2-1.
2-4. FUSE.
The power line is fused for 120 VAC operation with a 3AG Type
1/8 A, Slo-Blo. For 240 VAC operation use a 3AG Type 1/16 A, or
equivalent.
CHAPTER III
OPERATION
3-1. CONTROLS AND DISPLAYS.
All controls and displays necessary for the operation of the FS-4 are located on the front
panel. The three knobs switch the frequency range in .5 MHz steps and provide direct
frequency display in MHz at the readout directly above each knob. These knobs switch
the frequency in steps of 10 MHz, 1 MHz, and 0.5 MHz from left to right. The 0.5 MHz
knob also turns the FS-4 on and off. Refer to figure 3-1.
3-2. INJECTION CABLE.
The injection cable supplied is used to connect the FS-4 to an unused accessory crystal
socket of the receiver or transmitter. Attach the ground lug to the chassis at the accessory
crystal socket and insert the center pin into the selected accessory crystal socket. The
receiver or transmitter will operate best when the center conductor is connected to the
emitter of the crystal oscillator. This can be determined by noting the S meter reading
or power output readout when the injection cable is plugged into each socket of the
accessory crystal socket.
3-3. BAND SELECT.
When using the FS-4 to control a receiver or transmitter, the receiver/transmitter must
be placed in the proper band as you would in normal use, and the crystal switch must
be placed in the position corresponding with the position selected to plug in the FS-4.
The RF tune (preselector) of the receiver/transmitter must be tuned the same as in normal
use.
3-4. PRESELECTOR SETTING.
A stick-on-decal has been supplied for convenience in locating the positioning of the
RF tune (preselector). This may be applied to the receiver/transmitter front panel by
removing the knob and aligning the decal on the front panel and firmly rubbing it on.
Loading...