Cumulus Support

I have a wh1081 had a new transmitter got me for Christmas no receipt can not return. Ordered one from maplin it came did not work as like the other one didn't, found out two different Mhz, I need 433Mhz maplin out of stock. Can the Mhz be changed within the transmitter?

Hi,

You may need to be more specific about the exact "brand" (and date of purchase) of your original transmitter. There are unfortunately many different versions of the "1081".

But it might not even be just your frequency that is different, because Fine Offset also use different radio protocols (rather like different languages). There are several threads on this forum concerning the different protocols used by the "Maplin" stations alone.

All Maplin stations use 433.9 MHz, but the other frequency used (by some 1081s) in the UK is 868 MHz. Unfortunately, it's probably "impossible" to change the frequency (of a current Maplin unit) because the only 868 MHz unit which I've examined (a "Clas Ohlson") has totally different internal hardware (and thus software/protocol). It's also impossible to change the protocol/software (even if you knew what needed to be changed) because it's "burnt" into the microcontroller chip.

I believe that "Walters and Stanton" in the UK have sold spare transmitters, and also some might be found on ebay. But whatever you choose to try, you MUST ensure that it can be returned if unsuitable, because AFAIK there is no way to be sure that they will be compatible, from the outside (and their cases are glued together).

Cheers and sorry,

Alan.