Hi there!

I'm the one who started that previous discussion. I didn't tried it yet, but 
correct me if I'm wrong: RCX requires bi-directional communication in any case, 
so if you plan to build "spy bot" with RCX on board, you need two sets of 
extenders to provide bi-di comm.

Because of it is almost imposible to get two sets of such extenders working on 
different frequencies (at least in Poland), so I think I'll soon try with two 
identical. There is a slight chance that this will work, because of both RCX 
and Tower are bi-di - when one of it is sending, it will immediately start 
receiving it's own reflected signal, so I think that receiver is somehow 
disabled, when sender is working. 

Best regards
Szymon



> Hi Jim,
> 
> thanks for your message. I know that theese extenders are just one- 
> way. for my current "spy bot" I just need unidrectional so far. May I  
> try it with two of theese with different frequency etc etc...
> 
> thanks a lot for ur suggestions
> 
> Karl


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