Hi
I have been repairing the Ace Sniffler for sometime now. The Tx case is
sealed air tight & is used as an air chamber. There is one screw with a
pin-hole drill through its lenght in the side of the Tx case. This is an orifice
that meters the air flow in & out of the Tx case. In the Tx case their is a
short piece of tubing that goes over the end of the screw on the side of
the case & the other end goes over a smaller case (air flow meter) that
has two bead thermisistors (about .015" OD each bead). The two
thermisitors sit side by side in line with a hole (about .062" ID) through
their case. The air flows through this air flow meter, in & out of the bigger
Tx case. The thermisistors (1K to2K) are in a bridge circuit. When the Tx
goes up higher in the air, air flows out of the Tx case & cools just the one
thermisistor in line with the air flow through the air flow meter . The air
flow over the first therm blocks the the flow over the second therm., so
it is not cooled as much. Then when the Tx case comes down lower, the
air flows into the Tx case cooling the other therm. So you get a a tone
change, higher when air flows out of the Tx case & lower when air flows
into the Tx case.
The Picolario Talk is on 433 Mhz is in the Ham Bands & this freq falls in
the use fro Auxiliary/repeater link & control.
So you would have to be a Ham, & then is some parts of the USA you could
interfere with these link/control freq.
Howard Rudy KA7YWO
SLC, Ut.
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