Cumulus Support

My radio controlled clock does not seem to be working. The DST function is turned to the "ON" position. Per a previous posting I have repositioned my transmitter a number of times as well. Any advice would be appreciated? TIA

Ello,

The DST will be displayed, when a signal from the DST is recieved for a long enough period to register and stabilise.
The positioning of the Transmitter is critical, it may take upto 24hrs for it to pickup the signal again, once lost.

Hope this helps.

Jason

Jason,

Thanks for the quick reply. Can you kindly be more specific regarding the transmitter positioning? I'm assuming the transmitter you are talking about is the one on the thermo hygro sensor?

Thanks,
Brian

weather2009 wrote:Jason,

Thanks for the quick reply. Can you kindly be more specific regarding the transmitter positioning? I'm assuming the transmitter you are talking about is the one on the thermo hygro sensor?

Thanks,
Brian

No problem. Sure, the position of the thermo-hygro Sensor (Transmitter unit attached to the Instruments) is critcal to recieving the DCF Time Signal, It can be down to something as simple as Transmitter Height and Rotation.

You may find that, turning the transmitter round ever so slightly, may help recieve the time signal.

Wind and Rain, commonly affect the signal until after it has calmed.

Jason

As a matter of interest, what is the frequency of the time signal in Eu?
I have found that quite often, manufacturers will coil the aerial around about to get it all in the casing when it can improve things dramatically to allow the full 1/4 wavelength aerial to work better.

836 MHz. = 36Cm full wavelength
433 MHz. = 69Cm full wavelength

Divide by 4 for a 1/4 wavelength aerial

I think but Repairman can confirm?

Ello,

868mhz in the UK

868 MHz. = 35Cm full wavelength

Wouldn't make much difference

Guys ......

UK is 433 MHz for the wx communications (as is the wire aerial in the base unit).

The aerial for the Time sig is in the thermohygro unit, and is a coil around a ferite rod - which in some cases has been rattling around loose - so maybe a wire has come adrift.

https://cumulus.hosiene.co.uk/viewtopic.php?f=13&t=807

Hi
There are earlier posts about the position of the ferrite rod but briefly it is often badly positioned in the sensor unit often stuck in at an angle - should be horizontal and at right angles to the dcf transmitter (probably Frankfurt). Split the case apart carefully with a sharp knife and have a look.
Regards
Alan

A couple of links to explain the radio controlled clocks.

The UK transmitter...
http://www.npl.co.uk/science-technology ... ime-signal

The German transmitter...
http://www.meinberg.de/english/info/atomic_clock.htm

As far as I can determine in the spec the WH1080 uses the DCF German Transmitter.
Ideally the internal ferrite rod should be directed along it's length to Germany from your location. If it's end on to Germany that will cancel out or extremely attenuate the signal. The signal should be readily available for the whole of the UK, as long as it's not being shielded by metal buildings, etc. as it has a working range of 1500Km.

The UK WH1080's are on 868MHz (transmitter to console), although many remote thermometers are still sold that work on 433MHz.
The frequencies of the WH10 range do vary with different countries around the world to conform with their regulations; Australasia uses 433MHz and North America uses 915MHz.
Although one list of spec from a seller I saw says that the transmitter uses more than one frequency in the 433-868MHz range I do not believe this to be correct. I assume the UK model just uses 868MHz for it's data transmission.

Hope that helps a little.

Mike.