VLF transmitter DHO38

The VLF transmitter DHO38 is a VLF transmitter used by the German Navy near Rhauderfehn, Saterland, Germany. It is used to transmit coded orders to submarines of the German Navy and navies of other NATO countries.

DHO38 has transmitted since 1982 on 23.4 kHz with a power of up to 800 kilowatts. DHO38 uses an umbrella antenna which is carried from 8 steel tube masts with a height of 352.8 metres. Each pylon stands on 3 metre tall ceramic cylinders, which serve as insulators for voltages up to 300 kV. The masts are equipped with cylindrical oscillation dampers for better protection against storms. The transmitter is capable of transmitting signals to submarines worldwide to depths of approx. 30 metres.

External links

Coordinates: 53°04′55″N 7°36′59″E / 53.08194°N 7.61639°E / 53.08194; 7.61639

Radio spectrum (ITU)

ELF
3 Hz/100 Mm
30 Hz/10 Mm

SLF
30 Hz/10 Mm
300 Hz/1 Mm

ULF
300 Hz/1 Mm
3 kHz/100 km

VLF
3 kHz/100 km
30 kHz/10 km

LF
30 kHz/10 km
300 kHz/1 km

MF
300 kHz/1 km
3 MHz/100 m

HF
3 MHz/100 m
30 MHz/10 m

VHF
30 MHz/10 m
300 MHz/1 m

UHF
300 MHz/1 m
3 GHz/100 mm

SHF
3 GHz/100 mm
30 GHz/10 mm

EHF
30 GHz/10 mm
300 GHz/1 mm

THF
300 GHz/1 mm
3 THz/0.1 mm

Electromagnetic spectrum

← higher frequencies longer wavelengths → Gamma rays X-rays Ultraviolet Visible Infrared Terahertz radiation Microwave Radio

Visible (optical)	Violet Blue Green Yellow Orange Red

Microwaves	W band V band Q band K_a band K band K_u band X band S band C band L band

Radio	EHF SHF UHF VHF HF MF LF VLF ULF SLF ELF

Wavelength types	Microwave Shortwave Medium wave Longwave

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