The Prangins transmitter

Switched off in December 2011

HBG long-wave transmitter data

Location:	E 6° 15' 10.14" / N 46° 24' 30.24"
Frequency:	Transmitter is off (used to be 75 kHz).
Wavelength:	Transmitter is off (used to be 4000 m).
Power:	Transmitter is off (used to be 20 kW).
Call-sign:	Transmitter is off (used to be HBG).
Transmission type:	Transmitter is off (used to be a time and frequency reference station).

This transmitter has been switched off in December 2011.

Download HBG-75kHz-24102010-1134.mp3 (719,445 bytes): a recording of the HBG signal taken on October 24th, 2010 at 11:34 AM CET.
The recording starts 15 before and stops 15 seconds after 11:34 AM, in order to have the full minute code.
It was made with a CW receiver with an audio pitch of 700 Hz.

HBG long-wave antenna

Tower type:	Wire suspended between two self supporting towers.
Antenna type:	Electrically short wire, isolated from ground.
Feed point:	Lower end of the wire.

This antenna was built in 1931 and dismantled on September 6, 2012.

HBG antenna simulation.

The following picture, taken in September 2013, shows the place where the HBG antenna was standing viewed from approximately the same angle as the south view below. The "forest" of log-periodic antennas is still there, but the two big towers disappeared.

Four different views of the HBG antenna as it appeared on January 2011. The antenna is composed by five ropes suspended between the two big towers; ignore the small log-periodic antennas in the background.

South view of the whole HBG antenna. (January 2011)	North view of the whole HBG antenna. (January 2011)
View of the first tower and feed point of the HBG antenna. (January 2011)	View of the second tower of the HBG antenna. (January 2011)

The following four pictures were taken in July 2002. No apparent change was made to the antenna since then.



(July 2002)

GLA long-wave transmitter data

Location:	E 6° 14' 26.11" / N 46° 24' 29.44"
Frequency:	375 kHz.
Wavelength:	800 m.
Power:	N/A.
Call-sign:	GLA.
Transmission type:	Non-Directional Beacon.

This transmitter is still on air (Jan 2012).

Download GLA-375kHz-05012011.mp3 (423,962 bytes): a recording of the GLA signal taken
on January 5th, 2011. It was made with a AM receiver.

GLA long-wave antenna

Tower type:	Guyed mast.
Antenna type:	Short vertical with capacitive hat, grounded.
Feed point:	Higher than the base of the mast.

GLA antenna simulation.

Global view of the GLA antenna. (January 2011)	Capacitive hat of the GLA antenna. (January 2011)
Guyed mast of the GLA antenna. (January 2011)	Feeder of the GLA antenna. (January 2011)

This is how GLA was in July 2002. The matchbox has changed, and the transmitter could fit in a small electrical cabinet instead of the actual container.

East view of the GLA antenna. (July 2002)	South view of the GLA antenna. (July 2002)
Capacitive hat. (July 2002)	Feed point. (July 2002)

Other antennas on the same site

Vertical conical antenna. (July 2002)	Dipole array. (July 2002)
Log-periodic. (July 2002)	Log-periodic. (July 2002)
Plenty of antennas. (July 2002)	Rhombic antenna. (July 2002)
Vertical dipole. (July 2002)

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