Antenna Position as Far as the Planes of Said Antennas
#1
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Antenna Position as Far as the Planes of Said Antennas
I am mounting the main receiver antennas in a horizontal position and I am mounting the satellite receiver in a similar horizontal position. The planes of the antennas are separated by approximately 1 inch. There is no vertical component of the antenna. Does anyone have a comment on this mounting scheme? In my mind's view I see all the antennas are in the horizontal plane. Horizon has said the plane of the antenna serves no purpose.
#2
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RE: Antenna Position as Far as the Planes of Said Antennas
ORIGINAL: dwaynenancy
I am mounting the main receiver antennas in a horizontal position and I am mounting the satellite receiver in a similar horizontal position. The planes of the antennas are separated by approximately 1 inch. There is no vertical component of the antenna. Does anyone have a comment on this mounting scheme? In my mind's view I see all the antennas are in the horizontal plane. Horizon has said the plane of the antenna serves no purpose.
I am mounting the main receiver antennas in a horizontal position and I am mounting the satellite receiver in a similar horizontal position. The planes of the antennas are separated by approximately 1 inch. There is no vertical component of the antenna. Does anyone have a comment on this mounting scheme? In my mind's view I see all the antennas are in the horizontal plane. Horizon has said the plane of the antenna serves no purpose.
Where does Horizon say the orientation does not matter?
#4
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RE: Antenna Position as Far as the Planes of Said Antennas
90 degrees apart is the rule and if you have three antennas then you have your vertical component, otherwise with only 2 antennas they will always be in one (parallel) plane. If you have more than 3 antennas then you position it at 45 degrees.
Video says 3 inches apart minimum.
Here's Horrizon's video
[link=http://www.youtube.com/watch?v=tXFfJUGUH_U]http://www.youtube.com/watch?v=tXFfJUGUH_U[/link]
Video says 3 inches apart minimum.
Here's Horrizon's video
[link=http://www.youtube.com/watch?v=tXFfJUGUH_U]http://www.youtube.com/watch?v=tXFfJUGUH_U[/link]
#6
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RE: Antenna Position as Far as the Planes of Said Antennas
ORIGINAL: dwaynenancy
Rich, I was told that a technician at Horizon told the other flyer that parallel antennas was a satisfactory orientation. That's all I know.
Rich, I was told that a technician at Horizon told the other flyer that parallel antennas was a satisfactory orientation. That's all I know.
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RE: Antenna Position as Far as the Planes of Said Antennas
ORIGINAL: dwaynenancy
Rich, I was told that a technician at Horizon told the other flyer that parallel antennas was a satisfactory orientation. That's all I know.
Rich, I was told that a technician at Horizon told the other flyer that parallel antennas was a satisfactory orientation. That's all I know.
I've been an amateur radio operator (ham radio) since I was in high school and I have a degree in electrical engineering. And if it's one thing that hams understand, it's antennas. I guess most people have no concept of the radiation patterns of antennas so let me give you the quick and dirty.
The antennas receive mostly from a perpendicular direction. They do not receive signals coming at them from the direction that the ends of the antenna are pointing. They receive "broadside". The purpose of mounting them at right angles to one another is to try to eliminate any deadspot as the plane turns or rolls. If, for example, you mount the rx's such that antennas are all in a straight line, front to back along the fuselage, then those antenna ends are pointing right at you when the plane is coming directly toward you. Hence they will receive only a very weak signal at that time. But if you mount the rx's in a perpendicular manner, then one of the rx's will be broadside to you as it comes toward you and will receive a good signal.
#9
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RE: Antenna Position as Far as the Planes of Said Antennas
90 degrees apart in different planes is the preferred for receiver antennas. It's also likely that the transmitter antenna should be in a horizontal position across the top of the transmitter.
Admittedly, there can be conflicts. A HiTec receiver or receivers for "carbon fiber" have antennas long enough to make vertical orientation a problem.
A Spectrum AR600 has a long and short antenna. In this case, the horizontal antenna is usually the longer one for convenience in mounting.
Also consider that in "normal" flight the receiver's horizontal antenna is more or less horizontal.
There is a situation caused by two short antenna receivers and remotes that might be considered.
Should both antennas on the same unit be oriented the same way?
Admittedly, there can be conflicts. A HiTec receiver or receivers for "carbon fiber" have antennas long enough to make vertical orientation a problem.
A Spectrum AR600 has a long and short antenna. In this case, the horizontal antenna is usually the longer one for convenience in mounting.
Also consider that in "normal" flight the receiver's horizontal antenna is more or less horizontal.
There is a situation caused by two short antenna receivers and remotes that might be considered.
Should both antennas on the same unit be oriented the same way?
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RE: Antenna Position as Far as the Planes of Said Antennas
ORIGINAL: chuckk2
There is a situation caused by two short antenna receivers and remotes that might be considered.
Should both antennas on the same unit be oriented the same way?
There is a situation caused by two short antenna receivers and remotes that might be considered.
Should both antennas on the same unit be oriented the same way?
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RE: Antenna Position as Far as the Planes of Said Antennas
Good and easy to understand explanation of antenna's Doug.
I have one in the horizontal plane, one in the vertical plane. The Vertical satellite receiver has two stubs so one goes across the fusealage, one goes up and down, and the main Rx has its antenna going fore to aft as does the antenna for the TM1K.
Broadside is the key, I have all the possible orientations covered.
KKKKFL
I have one in the horizontal plane, one in the vertical plane. The Vertical satellite receiver has two stubs so one goes across the fusealage, one goes up and down, and the main Rx has its antenna going fore to aft as does the antenna for the TM1K.
Broadside is the key, I have all the possible orientations covered.
KKKKFL
#12
Senior Member
RE: Antenna Position as Far as the Planes of Said Antennas
Receiver two short antennas
Remote two short antennas
Standard advice is to mount them so that the antennas on each are parallel, and
at 90 degrees between units. It's possible to route the antennas differently, so that at least one is at at least 45 angle to the others.
I usually do this when the natural position of one units antenna is parallel to such things as metal control rods, or wiring.
I can't say if the results are an improvement or not, since I haven't had any recent (Knock on Wood) loss of control problems.
The problems I had some time ago were on models with the antennas oriented per the standard recommendations,
although that was not believed to be the cause. Brownout was the most likely culprit.
Remote two short antennas
Standard advice is to mount them so that the antennas on each are parallel, and
at 90 degrees between units. It's possible to route the antennas differently, so that at least one is at at least 45 angle to the others.
I usually do this when the natural position of one units antenna is parallel to such things as metal control rods, or wiring.
I can't say if the results are an improvement or not, since I haven't had any recent (Knock on Wood) loss of control problems.
The problems I had some time ago were on models with the antennas oriented per the standard recommendations,
although that was not believed to be the cause. Brownout was the most likely culprit.
#13
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RE: Antenna Position as Far as the Planes of Said Antennas
ORIGINAL: chuckk2
Receiver two short antennas
Remote two short antennas
Standard advice is to mount them so that the antennas on each are parallel, and
at 90 degrees between units. It's possible to route the antennas differently, so that at least one is at at least 45 angle to the others.
I usually do this when the natural position of one units antenna is parallel to such things as metal control rods, or wiring.
I can't say if the results are an improvement or not, since I haven't had any recent (Knock on Wood) loss of control problems.
The problems I had some time ago were on models with the antennas oriented per the standard recommendations,
although that was not believed to be the cause. Brownout was the most likely culprit.
Receiver two short antennas
Remote two short antennas
Standard advice is to mount them so that the antennas on each are parallel, and
at 90 degrees between units. It's possible to route the antennas differently, so that at least one is at at least 45 angle to the others.
I usually do this when the natural position of one units antenna is parallel to such things as metal control rods, or wiring.
I can't say if the results are an improvement or not, since I haven't had any recent (Knock on Wood) loss of control problems.
The problems I had some time ago were on models with the antennas oriented per the standard recommendations,
although that was not believed to be the cause. Brownout was the most likely culprit.
#14
Senior Member
RE: Antenna Position as Far as the Planes of Said Antennas
On my A/C with telemetry, the fades are usually quite low, less than 10 per antenna on the usual flight. In rehashing the two A/C that had problems last fall.
1. The 60A speed contol"s 2A 5v BEC's were used.
2. It was possible to "stall" some of the servos at the end of travel. One plane has flaps, and we suspect that the servos might have been stalled in the flap up position.
3. External 6A BEC's were installed, and any servos that were capable of driving control surfaces to mechanical stops or when full stick deflection might drive a servo to an internal stop were re-adjusted. (linkage, centering, and even transmitter travel/span.)
Unrelated testing of typical four cell AA NiCad and NMIH packs showed that an AR600's LED might blink when the momentary battery current draw was high, perhaps close to 2A, due to a drop in battery output voltage. My meters are not fast enough to accurately show the momentary drop in voltage, or the current causing it.
That said, the current was in excess of 1.5A, and the voltage drop must have been to well below 4V. The fooler was that the same battery packs voltage at full charge did not usually drop far enough to cause the AR600's LEDto blink.
1. The 60A speed contol"s 2A 5v BEC's were used.
2. It was possible to "stall" some of the servos at the end of travel. One plane has flaps, and we suspect that the servos might have been stalled in the flap up position.
3. External 6A BEC's were installed, and any servos that were capable of driving control surfaces to mechanical stops or when full stick deflection might drive a servo to an internal stop were re-adjusted. (linkage, centering, and even transmitter travel/span.)
Unrelated testing of typical four cell AA NiCad and NMIH packs showed that an AR600's LED might blink when the momentary battery current draw was high, perhaps close to 2A, due to a drop in battery output voltage. My meters are not fast enough to accurately show the momentary drop in voltage, or the current causing it.
That said, the current was in excess of 1.5A, and the voltage drop must have been to well below 4V. The fooler was that the same battery packs voltage at full charge did not usually drop far enough to cause the AR600's LEDto blink.
#16
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RE: Antenna Position as Far as the Planes of Said Antennas
ORIGINAL: NUMB LOCK
Can I mount a satellite receiver next to the gear's large air tank? Or would it suffer from interference?
Thanks,
Bob I.
Can I mount a satellite receiver next to the gear's large air tank? Or would it suffer from interference?
Thanks,
Bob I.