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MAKE A GREAT RIG GREATER!
Now you can add direct digital readout to
your Drake "twins" at a fraction of the cost of a new rig. Add the
Etek model FR-4 readout/Counter today and read both transmit and receive
frequencies to the nearest 100 Hz.
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Plugs into injection jack-no modification to transmitter or receiver. |
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No band switching-reads all frequencies directly. |
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Styled to complement Drake equipment. |
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Small size: 2-3/4" H x 8-3/4" D x 5" W. |
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Stable reading-last count held in memory. |
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Detailed operation/maintenance manual included. |
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Mode switch permits use as 50 mHz frequency counter. |
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Built-in heavy duty 110 V power supply. |
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3.579 mHz time base for low spurious signal generation. |
SPECIFICATIONS
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FREQUENCY RANGE (RF INPUT): 50 kHz to 50 mHz |
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SENSITIVITY: Better than 100mv-RMS |
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INPUT IMPEDANCE: 1.0 Megohm in parallel with no greater than 35 pf. |
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TIME BASE FREQUENCY: 3.579600 mHz |
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TIME BASE TEMPERATURE STABILITY: +-5 ppm, maximum in 20-30°C ambient |
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TIME BASE SETABILITY: +-2 ppm |
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GATE INTERVAL: 100 msec. |
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DISPLAY SCHEME: Non-flicker-last count held in memory |
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DISPLAY FORMAT: Six 7-segment red LED readouts (.3" high). LSD is 100 Hz. |
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POWER REQUIREMENTS: 105-130VAC, 60 Hz or 12VDC with user supplied dropping resistor |
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WEIGHT: 4-1/2 lbs. |
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CONTROLS: One three position switch OFF, COUNTER, READOUT (on back panel) |
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a) COUNTER-unit performs as a standard frequency counter |
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b) READOUT-unit corrects input for local oscillator offset and displays T/R frequency |
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CONNECTIONS: One RCA phono input (on back panel) |
FREQUENTLY ASKED QUESTIONS ABOUT THE FR-4
Q: How does it hook-up? Do have
to modify my rig?
A: When used with any of the Drake R-4 or T-4X series of transmitters and
receivers, the FR-4 merely plugs into the injection jack, labeled INJ, on the
chassis of the unit. If, as is usually the case, you are using both the
transmitter and receiver in a transceive configuration, you will find it
necessary to unplug the INJ cable at one end and add a "Y" adapter
(such as a Switchcraft 330 FP1) in series. This will provide a tap for the FR-4.
In any case you must provide a short cable with a male phono connector on each
end. Note that there is no modification to the Drake equipment required.
Q: Once connected to my Drake "twins" will the FR-4 read both
transmit
and receive frequencies?
A: When the FR-4 is used with a separate transmitter and receiver its
reading will be based on the signal in the cable connecting the two
units (the injection cable). For this reason it will display both transmit and
receive frequency when either the transmitter or receiver PTO is
in control. When the mode switch is set to SEPARATE, however, it will read only
t h e receive frequency. This, of course, is not a concern to the user since he
can check his transmitting frequency by switching the mode switch to XMTR
temporarily.
Q: Will the FR-4 provide accurate readout of auxiliary bands on my T-4X, R-4
station? Will it work with the FS-4?
A: The FR-4 will accurately display any frequency your rig can tune-in
fact, some users use junk-box crystals in the accessory crystal
position to create random 500 kHz band segments. Since the FR-4 takes both the
crystal and the PTO into consideration, it will always
tell you exactly where you are. With respect to the FS-4 synthesizer, the FR-4
will work fine since the synthesizer is merely a substitute
for the band selection crystals.
