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D816HD High-Power Combined FM Transmitters  
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Only Continental delivers the highest power solutions for HD Radio broadcasting. Continental's D816HD (dual transmitter) systems use low-level combined FM+HD in a 3dB combined transmitter system for higher power levels than offered by any other manufacturer.

Continental's D816HD Series Transmitters range in combined TPO from 18 kW to 56 kW at HD power levels of -20dBc to -10dBc. These combined transmitters use only one tube each, the final power amplifier tube. The IPA is solid state and requires no tuning. The exclusive "soft-start TM" circuit and low voltage controls allow the transmitter to recycle and return to the exact previous operational status.

The D816HD Series Transmitters are totally self-contained, including the harmonic filter. The 70 kW has two high voltage rectifiers and plate transformers located in two separate chassis. There are no controls, fuses, or circuit breakers on these cabinets. They may be located up to 100 feet away from the main cabinets if needed.

D816HD transmitter systems work with Continental's 802Ex digital FM/HD exciter to provide forward looking fully adaptive precorrection, system and HD performance monitoring and on-channel spectral analysis. In addition to the 802Ex, all Continental HD systems incorporate the 800Exp Embedded Exporter for unparalleled HD performance.

These combined transmitters may be set up in several configurations; single exciter to drive both transmitters, dual exciters, and dual exciters and automatic coaxial switcher/combiner for complete redundancy backup.

Combined Transmitter Power Table
Transmitter FM@1% HD FM@4% HD FM@10% HD
D816HD-20 40kW 36kW 25.2kW
D816HD-25 50kW 46kW 34kW
D816HD-28L 56kW 54kW 38kW
Note: 1%HD = -20dBc (dB below carrier), 4% HD = -14dBc, 10% HD = -10dBc

Comtact your Continental salesperson to learn more about how Continental can halp you move up to HD Radio.


D816HD Features:

  • Auto Power Control - Automatically adjusts the plate and screen voltages simultaneously so the transmitter stays tuned at all power levels.
  • Single Cabinet Design - (40 kW thru 60 kW) contains all power supplies, rf and control circuits, harmonic filter, and filament voltage regulator in a single cabinet. The 70 kW has an external power supply.
  • Solid State IPA - This IPA increases reliability and decreases maintenance and complexity, while increasing bandwidth. The entire IPA is mounted on slides for easy access.
  • VSWR Protection - One circuit handles severe instantaneous mismatches, such as lightning strikes. The second circuit limits the reflected power to a preset level by controlling the plate and screen voltage during icing conditions.
  • Positive Pressure Cabinet - The transmitter takes in filtered air from a duct in the top of the cabinet. By pressurizing the cabinet, it keeps dust from collecting inside the chassis.
  • World-Class Support - All Continental transmitters are backed by a two year limited parts warranty and 24 hour parts and service support as long as you own the transmitter.


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D816HD High-Power Combined FM Transmitters