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Old 15th May 2020, 8:07 pm   #4
hamid_1
Heptode
 
Join Date: Aug 2009
Location: High Wycombe, Bucks. UK.
Posts: 811
Default Re: Tandy/Realistic FM wireless intercoms

I have an Altai branded one, probably much the same internally as the Tandy ones. It uses low frequency RF transmission. I think mine can be switched to 150KHz or 250KHz to avoid interference or conflict with your neighbours. Both of these frequencies are in the long-wave band. I can pick up the intercom on a normal domestic LW radio in the same room, even though ithe radio is AM and the intercom is supposed to be FM.

Other than the above reception test, I haven't actually used it as an intercom, since I only have the one base unit. A pair is required. I'm guessing that these intercoms should still work despite much more mains-borne noise these days. FM is supposed to be quite good at rejecting interference.
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