Ariel Rocholl wrote:
> If you move to FSK modules you can get readily available ones for that price
> and even lower, including DSS capable and in some cases protocol embedded so
> you don't have to implement many things in SW. Try for instance Si4432
> modules from HOPERF (RFM22B or RFM23B). They do everything, including 64
> bytes FIFO, manchester, packet recognition, etc.
>
> AM (ask/ook) modules are too unreliable and extremely subject to noise. They
> are pretty much unusable in industrial or commercial areas in Europe in my
> experience. At the prices FSK modules have today, I don't see a point on
> going AM.
>
> 2010/5/12 Richard Prosser <rhprosser@gmail.com>
>   
These are cheap as they are "cob".
http://www.hoperf.com/rf_fsk/rfm12.htm

I have something similar in metal can that cost less than $15. A 115kbps 
transceiver.

But ASK/OOK superhet RX can be fine and does do better range at lower 
power, but only 1/100th data rate of FSK, the super-regen ASK/OOK are 
much poorer.  It depends on the application as to which is best. If you 
need low latency and > 1200bps then you need FSK.

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