| Author |
Message |
    
Wildrat
Advanced Member
Username: Wildrat
Post Number: 982
Registered: 12-2003
| | Posted on Monday, August 21, 2006 - 7:45 pm: | 
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Can this rejection kit be used with any beam?
http://www.copperelectronics.com/cgi-bin/checkitout/checkitout.cgi?catalogSTORE:CKIE:prod010-00040+ |
Road_warrior
Senior Member
Username: Road_warrior
Post Number: 1856
Registered: 7-2004
| | Posted on Monday, August 21, 2006 - 11:33 pm: |
|
They can be used on beams that already have
1 quad wire.
Do they work? NO |
Bruce
Senior Member
Username: Bruce
Post Number: 4000
Registered: 9-2003
| | Posted on Tuesday, August 22, 2006 - 6:12 am: |
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Everything I've seen shows that they DEGRADE the antenna ....... |
Wally38
Intermediate Member
Username: Wally38
Post Number: 125
Registered: 3-2005
| | Posted on Tuesday, August 22, 2006 - 10:26 am: |
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I've heard the same thing. Bad for your antenna. It's one of those gimmicks. I've also read it somewhere where they did testing on it and had all this technical data about it not being good. |
Bruce
Senior Member
Username: Bruce
Post Number: 4002
Registered: 9-2003
| | Posted on Tuesday, August 22, 2006 - 10:51 am: |
|
The QUAD was first used at HCJB radio and it like the YAGI-UDA array has a long history and much data to back up it's design.
ANY changing of the reflector OTHER than LARGER loops ( wires ) would have the effect of making the reflector ALSO try to be a director.
Unlike some adds Dr. Larson and NBS both published data on antennas back 30 years ago that gives real results and real field data........ |
Wildrat
Advanced Member
Username: Wildrat
Post Number: 990
Registered: 12-2003
| | Posted on Tuesday, August 22, 2006 - 12:28 pm: |
|
What about taking a single wire and running it around the reflector like on the pdl2. Would that help with rejection? |
Tech808
Moderator
Username: Tech808
Post Number: 10908
Registered: 8-2002
| | Posted on Tuesday, August 22, 2006 - 12:55 pm: |
|
Wildrat,
YES a SINGLE WIRE can help.
Check out the MACO ANTENNAS BELOW.
M00-05120 MACO Y-QUAD VERT/HORIZ
or
M00-05122 MACO COMET 6 ELEMENT 3/VERT 3/HORIZONTAL
or
M00-05124 MACO SHOOTING STAR 8 ELEMENT BEAM
or
M00-05112 MACO LASER 400 12 ELEMENT BEAM
Lon
Tech808
CEF808
N9CEF
CVC#2 |
Road_warrior
Senior Member
Username: Road_warrior
Post Number: 1857
Registered: 7-2004
| | Posted on Tuesday, August 22, 2006 - 5:39 pm: |
|
Quad rejection wires are my favorite.
But, pain in the drain in areas that have
a bad and windy climate. |
Hollowpoint445
Senior Member
Username: Hollowpoint445
Post Number: 1335
Registered: 6-2004
| | Posted on Tuesday, August 22, 2006 - 7:34 pm: |
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The single wire would have to be tuned for the correct frequency in order for it to have the proper effect. On a cross polarized yagi, this would not happen because the length from tip to tip to tip to tip would be too long. |
Bruce
Senior Member
Username: Bruce
Post Number: 4003
Registered: 9-2003
| | Posted on Tuesday, August 22, 2006 - 8:02 pm: |
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"What about taking a single wire and running it around the reflector like on the pdl2. Would that help with rejection"
Hollowpoint is correct the wire length has to be right but I have never see a set of DATA either way. |
Wildrat
Advanced Member
Username: Wildrat
Post Number: 993
Registered: 12-2003
| | Posted on Tuesday, August 22, 2006 - 8:22 pm: |
|
does not seem that difficult to me. Read the instructions on the pdl2, it gives you the length of the wire. I would Imagine that maybe the reflector on the pdl2 is possibly the same length as the maco. If it is then there should be no problem , Right? Maybe?
WR |
Bruce
Senior Member
Username: Bruce
Post Number: 4005
Registered: 9-2003
| | Posted on Wednesday, August 23, 2006 - 7:39 pm: |
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a 2nd wire must be longer than the first one .... |
