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Wrong freq on AXB-RF

I am trying to find out if it's possible to change the freq on a AXB-RF. I have 9 units and none of them are 433mhz. Has anyone done this? Would be interested in trading 2 for 1 also if someone has one extra.


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    ericmedleyericmedley Posts: 4,177
    This is probably wrong but I seem to remember these units were changeable from 433 or 408 (or 418mhz...) either one of the two. It is done by swapping out the quartz timer chip. These are available out there at your favorite electronics online parts store. Don't quote me on this however... I don't think there was a dip switch setting or whatnot to do it.
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    AuserAuser Posts: 506
    There's a few points to this:

    - There are a few different versions of these receivers, some of which can be retuned and some which cannot.

    - The ones that can't be retuned have an RF RX daughter board. These can be replaced simply by buying a $10 RX receiver module and whacking it on a bit of veroboard to replace the original board.

    - From memory, depending on the receiver module you may need to invert the output using a simple single transistor inverter.

    - Check this link for a discussion http://www.amxforums.com/showthread.php?98-Retuning-an-AXR-RF

    - Check this link for the technote referred to above as the original link is broken http://www.amx.com/techsupport/techNote.asp?id=340

    I made the mistake of buying a VPT-CP and AXB-RF from someone without checking they were the same frequency. I used this guy in the receiver to get it to talk to the VPT-CP http://www.jaycar.com.au/productView.asp?ID=ZW3102

    If you are interested and ask nicely I'll dig mine out and pop the lid off for some happy snaps.
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