Products 

Frequency Range:

   50-54, 66-88, 136-174, 220-240, 270-285, 406-512MHz.

Power Output:

   50-285MHz Range:  10 or 30W nom.  75W 136-174MHz.
   60W 220-230MHz.   136-174MHz:  150 & 300W Amps available.
   406-512MHz:  10 or 40W nom.  100 & 200W Amps available.

Receiver Sensitivity:

   0.22uV for 12dB SINAD typ.

Squelch Threshold:

   0.1uV typ.

Power:

   AC:  120 or 220V nom., 50-60Hz
   DC:  13.8V Nom. 12.5 to 14.5VDC range

Includes:

   2 Front Panel Meters which read

      Meter #1:

         Exciter Relative Output, Final Rel. Output, Receiver 
         Signal Strength, RX Signal Deviation, Received Signal
         Frequency Error (+ or - 5KHz)

      Meter #2:

         +5VDC Supply Voltage, +13.8VDC Supply Voltage, Receiver
         Regulated 9VDC, TX Regulated 9VDC, Exciter Current,
         Final Amp Current

   Front Panel lighted pushbutton switches for:  COR Disable, COR
   Simulate, ID Trigger, TX Inhibit/Reset, AC Power
   Panel Lights for:  RX Incoming Signal, TX ON 

   Front Panel Controls for:  Squelch, Local Volume, RPT Audio Level,
   TX Carrier "Hang Time", TX Time-Out Time





   Front Panel Monitor Speaker, AC Fuse, Local Mic Input Jack, Deluxe
   panel handles for ease of handling

Other Features:

   Built-in CW IDer.  All CMOS Logic control - for super low
   current draw.  12VDC Battery Backup with automatic changeover.
   Binding Posts for 12VDC Input.  (Battery not included.)  Rear
   Panel Jacks for Interface to external equipment.  The unit is
   thoroughly tested and tuned to your RX and TX frequencies.

Same specifications as for the SCR1400 above, except for the following:

   No panel meters or controls except for Squelch and Local Monitor Volume.
   CW IDer board is an option.  The built-in AC power supply may be deleted
   as an option.  Adjustable trim pots for Audio Levels and Timers are
   internal.  No panel handles.  Local Mic is optional.

Cabinets, Duplexers, Duplexer Hookup Cables, Antennas,
Autopatch/Interconnect, CTCSS or DCS (single tone board
internal, or multiple Tone Panel),  High/Low TX Adjustable
power, etc., etc.  Please Inquire.  We can provide a
complete system.

1 Year Factory Warranty:  Covers parts and labor.  Unit
must be returned to factory for service.

Frequency Range:

   30-54, 66-88, 136-174, 220-240, 270-285 MHz
   Appearance and specifications are basically the same as SCR450A below

Frequency Range:

   406-512 MHz

Sensitivity:

   0.22uV typ. for 12dB SINAD

Squelch Threshold:

   0.1uV typ.

Metering Outputs:

   Signal Strength (RSSI), Frequency Error, FM Peak Deviation

DC Input:

   12.0 to 14.5VDC. (13.8VDC nom.)

Board Size:

   5.5 X 4.9 X 1.2"H

Shielded Housing (optional):

   Aircraft Aluminum, with Heliarc welded seams for excellent RF
   Shielding and ruggedness.  With antenna jack, and feedthrough
   caps for all inputs and outputs.  Size:  8 3/4 X 5 5/8 X 2 5/16"H.
   (W/O feedthrough caps or RF connector.)

   Fully wired and tested.  Excellent unit!

Frequency Range:

   50-54 and 66-88 MHz - 3 or 30 Watt units.
   136-174, 220-240, 270-285 MHz - 10 or 30 Watt units.
   136-174 MHz - 75 Watt.   220-240MHz - 60W units.

Frequency Range:

   406-512 MHz - 10 or 40 Watt units.

850-960 MHz:  15 or 40 Watt units.

Available as complete shielded transmitter subassembly only.

Variable (or switched) High/Low Power Output

SCA100 or SCA300 High Power Amplifiers - Inquire

Shielded Aluminum Housing, w/ feedthrough caps & antenna jack.

Fully wired and tested.  Excellent Unit!

Audio Inputs:

   25K ohm High Impedance Input for voice or tones.  CTCSS input.
   Optional 600 ohm balanced AF Input.

Modulation:

   True FM - for excellent audio quality and low distortion.
   FSK units also available.

Duty Cycle:

   100% for all units when Spectrum-supplied heat sink and
   housing is used.

DC Input:

   12.0 to 14.5VDC.  13.8VDC nominal.  Excellent efficiency!

Board Size:

   SCT110 or 410B:  6 3/8 X 5 5/8"
   30 or 40 Watt Amp Boards:  4 X 2"
   60-75 Watt Amp Boards:  6 7/8 X 1 7/8"

Shielded Housing Size:

   10 5/8 X 6 5/8 X 2 5/16"H.  (W/O Amp Heat sink,
   RF connector, or FT caps.

For use in making a Repeater.  Includes TX Carrier "Hang Time" and
"Time Out" Timers;  Switch Inputs for COR Simulate, COR Disable, and
Local TX Inhibit/Reset.

Lamp Drivers for:  RX Incoming Signal, COR Simulate, TX Inhibit/Reset.
Transistor Switches for TX Key/PTT, ID Trigger, AUX RX COR switch.

All CMOS Logic for super low 3mA current draw.  +5VDC Input.  (Up to
15VDC Input for Lamps only.  Normally used with Spectrum Receivers,
but may be used with other make receivers.)

3 ON/OFF Functions per board.  Decodes all 16 digits.  Control codes
are programmed by convenient plug-in cards.

For remote control of Repeater or other functions via a radio or
audio link.  Antifalsing design.

5VDC Input at 15 mA.  6 X 4 3/4".

136-174 or 220-240 MHz range.  6 section High Q Bandpass Filter
combined with low-noise amplifier stage.

Provides tremendous rejection of "Out-of-band" signals - eliminates
or greatly reduces "Intermods", "Desense", or Spurious Responses and
Overload of the receiver front-end due to these strong out-of-band
signals.

-60dB attenuation at +/- 6MHz typ.  -70dB ultimate  attenuation.

Enclosed in tightly shielded aluminum housing.  (Not intended to
filter-out "in-band" signals.)   UHF connectors.

12 - 14VDC Input at 10mA.

Size:  4 3/8 X 2 3/8 X 1 1/4" H, plus connectors and cable.

Excellent Unit - Hundreds in use throughout the world!

Rack Mount Paging Transmitters

Thousands in use throughout the world!

Frequency Range and Power Output:
 
   VHF:   66-88MHz: 3 or 30W units
          140-174MHz, 220-240MHz, 270-285MHz: 10 or 30W units
          140-174MHz:  75W.   220-240MHz:  60W
          140-174MHz:  150W with SCA100 Amplifier
                       300W with SCA300 Amplifier
          270-285MHz:  100W with SCA100 Amplifier
                       200W with SCA300 Amplifier

   UHF:   406-512MHz:  10 or 40W units
          100W with SCA100 Amplifier
          200W with SCA300 Amplifier

          900-960MHz:  15 or 40W units.  (Variable
                       Power is standard.)
                       100W with SCA100 Amplifier
                       200W with SCA300 Amplifier

Features:

* Digital, Tone and Voice Modulation
* Accepts all 2 level Digital Formats:  Pocsag, Golay, etc.
* Direct FM or Direct Digital Synthesis with SS10,000 
  Ultra-High Stability Oscillator option
* 100% Duty Cycle
* 100% Solid State
* Panel Meter and LED Status Indicators - for ease of
  maintenance and troubleshooting
* AC or 12VDC operation - with Battery Backup capability for exciter.
    (Except for 900MHz SCA100 & 300 which require 24VDC.)
    Battery backup for high power amps is optional.
* Frequency Stability (-30 to +60 degrees C): 
    Std. SCT1500:  1ppm nom.
    With optional SS10,000:  .002ppm nom.
* Spurious Emissions:  -75dB nom. for std. SCT1500.
    With SS10,000:  -75dB typ. >1MHz away from Fo.
                    -62dB typ. <1MHz away from Fo.
* Digital FSK Deviation:  Adjustable up to 5KHz. 
                          Factory set to 4.5KHz std.
* Options:  Hot Standby System;  Exciter High VSWR Shutdown;
  Gas Tube for AC Line Lightning protection.
* FCC Type Accepted:  Parts 21, 22, 90
* Made in USA
* 2 Year Warranty, except 1 yr. on SCA100 and SCA300
* Size:  SCT1500 10-75W Exciter only:  19"W (rack mount) X
         7"H X 14"D.  4 ft. high Cabinets are available as
         an option.
* Weight:  10-75W Exciter only:  22 lbs. net. 30 lbs. packed
* Rugged Construction:  High Quality Aircraft Aluminum, with
    Stainless Steel Hardware.  Glass-epoxy MIL Spec pc boards -
    for many years of reliable service.

"Desk Top" Paging Transmitter

1-10W Low Power unit.  Ideal for "In House" use for Office
Buildings, Plants, Hospitals, Hotels, etc.  Or, to "fill-in"
dead spots in large systems.  In use all over the World!

Frequency Range:  136-174MHz, 66-88MHz, 220-240MHz, 270-285MHz,
                  406-512MHz, 900-960MHz.

Power Output:  1 to 10W nom. adjustable. (3-5W nom. 66-88MHz)

Features:

* Digital, Tone and Voice Modulation
* Accepts all 2 level Digital Formats, (POCSAG, Golay, etc.)
* Direct FM
* 100% Duty Cycle
* LED Indicators for AC Power and "Transmit"
* Built-in AC Power Supply.  (Specify 120 or 220VAC)
* 900MHz unit includes built-in cooling fan.  (Not required
    on other versions.)
* Simple Interface to your Terminal
* FCC Type Accepted - Parts 21, 22, 90
* Frequency Stability (-30 to +60 degrees C): 2ppm nom. to 512MHz.
    1.5ppm nom. 900MHz.
* Baud Rate:  to 1200 bps standard.  2400 bps optional.
* Small Size
* Low cost
* Rugged Construction:  All heavy duty aircraft aluminum housing,
    with stainless steel hardware.  MIL spec glass-epoxy PC
    boards.  Only the finest quality components and construction
    are used - for many years of reliable service.
* Size:  12"W X 11"D X 3"H. (Not including rear fins.)
         900MHz - 4 3/4"H with fan.
* Weight:  8 lbs. net.  15 lbs. packed

Frequency Range and Power Output:

VHF:

   136-174MHz:  150W nom. output for 30W in.  (Or 6-10W input.)
   275-285MHz:  100W nom. output for 30W in; or 10W in.

UHF:

   406-512MHz:  100W nom. output for 40W in; or 10W in.
   850-960MHz:  100W nom. output for 35W in

Features:

* Very Large oversize heatsink, with forced air cooling for cool
    operation and long transistor life.  Definitely NOT another
    low-duty cycle mobile amp bolted to a rack panel!
* Pure aluminum heatsink for high heat conductivity - NOT poor
    conductivity zinc castings as with some competitors.
* Absolutely 100% Duty Cycle!
* Rugged all aluminum construction with stainless steel hardware
* Near perfect RF Shielding and DC RF Filtering - eliminates 
    "stray RF leakage".
* For 136-512MHz versions, Automatic "Amp Bypass/Protection Mode" 
    is included.  If there should be a High Output VSWR, or High
    Temperature condition, or if the power supply should fail,
    then the built-in RF changeover relay will drop-out, and
    the amp will be bypassed.  (i.e. the exciter will be connected
    to the antenna so that you can stay on the air at low power.)
    These versions also include front panel LED Indicators for
    RF Output, High VSWR or High Temperature Shutdown;  and a
    VSWR Reset button.
* Behind the Panel heat sink arrangement permits use in a cabinet
    with a locking front door (for security from tampering) -
    without loss of cooling effectiveness!
* Available with or without on-board AC Power Supply - (switcher
    type).
* DC Operating Voltage:  13.8VDC nom.; except 24VDC nom. for 
    900MHz unit. Reverse Voltage Protection on DC Input, which
    is fused.  
* Specify:  120, 220VAC, or 12VDC cooling fan

Frequency Range and Power Output:

   136-174MHz:  300W Output nom. for 70W input
   275-285MHz:  200W Output nom. for 12W input
   420-480MHz:  200W output nom. for 14-20W input 
   850-960MHz:  200W output nom. for 21-30W input

* Extremely Large and Massive Heat Sink and cooling fan for
    excellent cooling and long transistor life.  Very Rugged
    design!
* Other Features:  Same as the SCA100 above, except that Amp
    Bypass mode is not used.

Specifications are basically the same as the "Shielded Receiver 
Subassemblies" listed above, except mounted on a 5 1/2 X 19" rack
panel.  With panel Monitor Speaker.

Available with or without built-in AC Power Supply, and with or
without 2 panel Meters - (for Signal Strength, Received Signal
Frequency Error, RX Sig. FM Deviation, and Voltages).

40 to 512 MHz Freq. Ranges.

Specifications are basically the same as the "Shielded Transmitter
Subassemblies" listed above, except mounted on a 7 X 19" rack
panel.

With built-in AC Power Supply, with 12VDC Battery Backup
capability, and Panel Meter for Voltages, Currents, and FM
deviation.

High Power Amplifiers available.

10-75W units.

[A new low cost version may be available soon without metering,
and with or without lower cost AC supply built-in.  Appearance
is basically the same as SCT1500 shown above.  Inquire.]