its always had woefully pathetic range, but seems to have become worse at night or during rain.
If i sit the transmitter inside next to the reciever it stays connected for days on end no problems. now this is despite the batteries being good, and the solar being disconnected. my problem is that overnight it drops out and doesnt reconnect to the base till during the day. Or just solder a wire to the feed point.įirstly if i disconnected the red blob cap, wouldnt the trace that leads around the edge of the cutout become part of the antenna up to the point i connected onto with the yellew wire ? and wouldnt that make the pad near the silkscreen "WHP0063B1" the feed point ? and if i connect an antenna there, would i cut that trace that leads out from there and around the cutout ? thanks for your help this sounds good. You could i suppose remove the cap to disconnect the existing tuned circuit and take a thin coax from the feed point to an external socket, like a BNC. Your original point with the yellow wire is in the middle of the acceptor circuit. The actual feed point is the other side of the cap where you had your yellow wire. It could be illegal depending what you connect it to. That said, i've seen yagi beams connected to wifi routers to extend range for up to a mile or so, so i wouldnt worry too much about it. Also it may not even be legal if the radiated energy exceeds the original design. If you wanted to connect an external antennae to it, its worth remembering the circuit is not designed for it.
Its crystal controlled, 433 Mhz, so frequency shift not be too much of an issue (hopefully).
It forms the TX aerial and should be tuned for maximum radiation with a wave meter / receiver / analyzer.
Weather pcb series#
These two are in series forming an acceptor tuned circuit. The PCB track is a coil and the red blob of wax hides a trimmer cap.
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