RF 433mhz. Missing antenna? (lots of junk receiving)

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hi all,

i got (as many others) set of rf 433 tx/rx ebay. like:
http://www.ebay.com/itm/1pcs-433mhz-rf-transmitter-and-receiver-kit-for-arduino-project-/261041100836

xy-mk-5v , fs1000a (xy-fst)

while connecting it, i'm picking lots of noise/junk on receiving end (continuously).

my questions following:

1. on both units there no external antenna's, mean there missing?
2. see on both small hole 'ant", assuming need attach own antenna?  tx/rx need both one?
3. assuming small tiny copper wire (spiral), antennas, maybe i'm wrong?

many thanks!

36r

looks intended have antenna.  think straight piece of bare wire  17.3cm long appropriate.


Arduino Forum > Using Arduino > Project Guidance > RF 433mhz. Missing antenna? (lots of junk receiving)


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