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Hopefully the attached photos will show what I am interested in knowing about. Why or what purpose does the large brass tube barrel piece serve below the last tuned section of the receiver antennae. I have seen this concept on several brands of antennae/receivers in the 2.4 ghz world. To easily mount this receiver in a boat this fat section complicates the process. I carefully sliced away the heat shrink tubing and also very carefully unsoldered the brass tube.
To help illustrate the concept in words here goes. We know you don't mess with the antennae length. This length is very carefully designed by the manufacturer and any altering could reduce your effective range of safe control. The antennaes on 2.4 ghz receiver are called co-axle antennaes with a center core conductor covered with a thin plastic insulating cover. Around this insulator is a woven wire mesh or braided shield and that too is covered with another plastic cover. The only part of the antennae that is active is the last exposed tuned section that extends out beyond the wire mesh shielded lead. In this case the fat barrel of brass tubing is soldered to the wire mesh shield right at the end point of this shield right where the tuned section begins. Admittedly the two recievers shown in my photos are 8 channel airplane receivers but I have seen this on surface receivers as well. Why, what does this fat barrel do? I have carefully checked for range differences and don't find any difference at all.
Dave
To help illustrate the concept in words here goes. We know you don't mess with the antennae length. This length is very carefully designed by the manufacturer and any altering could reduce your effective range of safe control. The antennaes on 2.4 ghz receiver are called co-axle antennaes with a center core conductor covered with a thin plastic insulating cover. Around this insulator is a woven wire mesh or braided shield and that too is covered with another plastic cover. The only part of the antennae that is active is the last exposed tuned section that extends out beyond the wire mesh shielded lead. In this case the fat barrel of brass tubing is soldered to the wire mesh shield right at the end point of this shield right where the tuned section begins. Admittedly the two recievers shown in my photos are 8 channel airplane receivers but I have seen this on surface receivers as well. Why, what does this fat barrel do? I have carefully checked for range differences and don't find any difference at all.
Dave
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