Does anyone know the exact frequency the BeCM unit responds to?

I know it's 433 MHz but I need the precise TX frequency and bandwidth, I guess it's not modulated in any way

Am gonna have a go at making my own RF receiver, I found a unit that operates at 433.92 MHz - is this the same as the RR?

hi chewster,
yes its defo 433 , good luck i hope you are susccesfull you will make a few bob !!!!!! dont forget that theres 3 upgrades the part no for latest r,f reciever is =
YWY500170 THIS HAS A ROUND GREEN STICKER ON IT SAME AS 2ND EDITION
FIRST EDITION HAS BLUE DOT ,,,,, CHECK OUT ONE OF MY OLD POST'S WITH THE 3 PHOTOS OF THEM SHOWING INTERNALS ,, AS FAR AS I REMEMBER THEY ONLY CHANGED ONE COMPONONT ON THE BOARD BUT REDESIGNED OTHER BITS I HAVE A COUPLE OF THE OLD ONES KNOCKING ABOUT SO I CAN ALWAYS SEND YOU IT , CHEERS MOZZ ,,

Chewster said:

Does anyone know the exact frequency the BeCM unit responds to?

I know it's 433 MHz but I need the precise TX frequency and bandwidth, I guess it's not modulated in any way

Am gonna have a go at making my own RF receiver, I found a unit that operates at 433.92 MHz - is this the same as the RR?

Click to expand...

The RF part of the receiver is easy, you can buy a tuneable 433Mhz receiver for peanuts, the problem is the pre programmed recognition code in the other chip. The manufacturer will not release detais of the chip for security reasons, I know I've tried. Maybe you can front end a new RF receiver onto the second stage.

Datatek said:

The RF part of the receiver is easy, you can buy a tuneable 433Mhz receiver for peanuts, the problem is the pre programmed recognition code in the other chip. The manufacturer will not release detais of the chip for security reasons, I know I've tried. Maybe you can front end a new RF receiver onto the second stage.

Click to expand...

That's about what my approach will be to be honest! I don't think they would have changed the code receiver at all with the newer units - I really believe it's just a much narrower RF receiver and better filter, and it should be possible to bodge a better receiver onto the existing code chip

I think i'll borrow a unit to read the precise freq that is transmitted, don't want to replicate the earlier units after all do I??

Chewster said:

That's about what my approach will be to be honest! I don't think they would have changed the code receiver at all with the newer units - I really believe it's just a much narrower RF receiver and better filter, and it should be possible to bodge a better receiver onto the existing code chip

I think i'll borrow a unit to read the precise freq that is transmitted, don't want to replicate the earlier units after all do I??

Click to expand...

You are right, the new receiver has better discrimination and responds to only the correct frequency. If my receiver palys up, it's Mk2, I will be looking at grafting another receiver on. No time to play at the moment though.