CONTINENTAL ELECTRONICS 419 H DRM

GENERAL DESCRIPTION

The Continental Electronics Type 419H-DRM Transmitters are versatile, state-of-the-art, high-efficiency 300 kW DRM shortwave transmitters capable of being operated in standard amplitude modulation (AM), Controlled Carrier-level Modulation (CCM) or digital streaming in the DRM mode (when used with the optional DRM Encoder/ Exciter).

From a central master control panel or from a remote computer, the 419H-DRM Transmitters may be set up and either preset or automatically tuned to deliver full carrier power at any frequency between 3.9 and 26.1 MHz. If desired, they may also be manually tuned using controls and indicators located on the central master control panel.

The Continental Electronics Type 419H-DRM Transmitters employ some of the most technologically advanced components available today. They include all required switch gear, power supplies, protective circuits, amplifiers, controls, and cooling and peripheral equipment. They are compact in design yet easy to service and maintain. Particular care in the design has been given to operational reliability and efficiency, resulting in transmitters delivering high performance broadcast service with minimum maintenance and down time.

FEATURES

Selection of up to 280 preset frequency channels achieved within 30 seconds between any two frequencies

Standard Frequency Range 3.9 - 22.0 MHz with available option of 3.9-26.1 MHz

New Computer-Assisted Touch Screen Control System, as well as front panel button operation

TCP/IP Based Remote Control System allows unattended operation, with complete control from off-site with no modification

71 – 73 % overall efficiency on average

DRM Operation with standard optional DRM Encoder/ Exciter, plus all AM/PM Modes

High-Efficiency Solid State Modulator and HV Power Supplies offer low-stored energy protection without crowbar

Exclusive CCM (Controlled-Carrier level Modulation) allows carrier reduction from 0-6 dB in 1 dB steps

Self-Contained Water System for Primary Loop Cooling to external heat exchanger or facility water

Dual Fan, Epoxy Coated, External Heat Exchanger with Coated Coils for Corrosion Resistance

High-Speed Arc Sensors In All Critical RF Component Areas

Both PA and Driver Tubes and Vacuum Capacitors available from alternate sources

TECHNICAL SPECIFICATIONS
ELECTRICAL
RF Carrier Output Power (A3E)	300 kW on all frequencies through the 3.90 to 26.1 MHZ range
Reduced RF Carrier Output Power (A3E)	The Type 419H DRM Transmitter can be operated at any power level between 45 and 300 kW with the controls provided
Power Source	4160 VAC, or 11,000 VAC, 3 phase, three wire, 50/60 Hz. Other voltages on special order. Mains power requirement is 650 kW with 100% tone modulation condition at 0.95 lagging power factor
RF
Efficiency	The overall efficiency of the Type 419H DRM Transmitter measured as an average of ten frequencies over the range of 3.9 - 26.1 MHz at 300 kW carrier power level will not be less than 71% with any depth of modulation. (Lower at lower power levels)
Frequency Range	3.9 - 22 MHz continuous in 100 Hz increments. 5.8-26.1 MHz, optional
Tuning Time	An average of 10 typical frequency changes takes less than 30 seconds each
Standing Wave Ratio	Rated for 2.0:1 VSWR at full power or any customer selected VSWR below 2:1
RF Output Impedance	300 ohms balanced (Standard); 50 or 75 ohms unbalanced Optional
Carrier Level Shift (A3E)	Less than or equal to +/-3% shift at 100% tone modulation with 1 kHz sine wave exclusive of power line variations
RF Spurious	Less than 50 mW. Out of band emissions in compliance with CCIR 328-5
ENVIRONMENT
Ambient Temperature Range	Indoors: +40 to +111°F (+5 to +45°C) Outdoors: +14 to +111°F (-10 to +45°C)
Relative Humidity Range	0 to 95% relative humidity, non-condensing
Altitude	Up to 6,000 ft. (1,829 m) above sea level
Cooling	Water, heat exchanger (supplied), and air cooling
AUDIO
Modes of Emission	A3E and DRM, Standard, SSB Optional
Modulation Method	High efficiency all-solid-state step modulator using EER for AM/PM Modes
Audio Input Requirements	Adjustable from -8 to +10 dBm for 100% AM modulation
Audio Input Impedance	600 ohms, balanced. Other impedances on special order
Audio Response (A3E)	+/-1 dB from 50 Hz to 5000 Hz at 70% modulation or modulation level. +1/-1.5 dB, 5000 - 7500 Hz
Audio Harmonic Distortion (A3E)	Less than 3.5% at 50-90% modulation from 50 to 7500 Hz; less than 4.5% at 90-100%
Carrier Noise	-56 dB, unweighted, referenced to 100% modulation with a 1 kHz tone
Controlled Carrier Level Modulation (CCM)	The Type 419H DRM Transmitter has the capability of operating with variable carrier power. This technique scales the amplitude of the carrier to the percentage of modulation. The carrier can be reduced as much as 6 dB below the rated value without audio distortion and can be a major cost saving to the user
Modulation Capability	100% sinusoidal modulation at frequencies from 50 to 7,500 Hz, for ten (10) minutes per hour. Up to 70% modulation on a continuous basis
DRM
RF Output Power (DRM)	150 kW RMS, 1200 kW PEP with 9 dB Crest Factor
DRM: Meets all IEC PAS62272-1 & ETSI REF.ES 201 980 V.1.2.1 2002-07 specifications	See the exciter brochure for a full list of features. DMOD3 DRM Exciter is totally integrated into the transmitter
DRM Modes	All DRM 9 kHz and 10 kHz bandwidth modes are supported
MER (Modulation Error Rate)	-30 dB, or better
SSB Option
RF Output Power (H3E and R3E)	600 kW PEP Two-Tone
High Efficiency	H3E and R3E (LSB, USB and ISB) using EER (Envelope Elimination and Recovery)
Intermodulation Distortion (H3E & R3E)	At least -35 dB relative to either tone of a two-tone test signal
Carrier Reduction (H3E & R3E)	-6 dB to -24 dB relative to full carrier or full Carrier suppression
Specifications may change without notice

TUBE COMPLEMENT
RF stages		AF stages and modulator
Number	Type	Number	Type
1	4CM300,000GA or TH537 or TH573
1	3CW20,000A7

THIS TYPE OF TRANSMITTER IS INSTALLED IN THE FOLLOWING COUNTRIES
	ITU	Country	ITU	Country
	IND	INDIA	ARS	SAUDI ARABIA
	E	SPAIN