| Author |
Message |
    
Rinus558
New member
Username: Rinus558
Post Number: 1
Registered: 4-2012
| | Posted on Monday, April 23, 2012 - 9:01 am: | 
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Just find this great forum en read a lot the last few days.
Specialy the GPK discussions,I just buy the GPK for the 2000,but I read a lot of different places to put it on.
What is the best place,the upper or the lower u-bolt(what Solarcon advised).
I think after reading te "Imax exposed" story the best place is the upper u-bolt direct onder the coil and radiator,because inside the sleeve between the bolts is coax,so the feedpoint of the coil and radiator is at the place of the upper bolt.
But maybe it doesn`t matter and the only important thing is to lift up the drooping angle of the radials from 45 to 30 degrees. |
Starface
Senior Member
Username: Starface
Post Number: 3144
Registered: 1-2005
| | Posted on Monday, April 23, 2012 - 11:12 am: |
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lower u-bolt(what Solarcon advised).
lift up the drooping angle of the radials from 45 to 30 degrees. |
Tech833
Moderator
Username: Tech833
Post Number: 2156
Registered: 8-2002
| | Posted on Tuesday, April 24, 2012 - 10:22 am: |
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Solarcon recommends the lower bolt position for good reason.
Your radio 'Mythbuster' since 1998
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Rinus558
New member
Username: Rinus558
Post Number: 2
Registered: 4-2012
| | Posted on Wednesday, April 25, 2012 - 7:04 am: |
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Both thanks for thinking with me,today I shall try to bent the radial-plate corners a little to 30 degrees and then wait for better weather to put it on the Imax.
I think it will work because he`s standing now on a PAINTED mast(6 foot)and therfore has no counterpoise at all.
I also make a good contact from antenna and mast then,and also re-place the cable-choke direct under the 2000.
Let know how things are going on the forum. |
Rinus558
New member
Username: Rinus558
Post Number: 3
Registered: 4-2012
| | Posted on Sunday, May 06, 2012 - 9:22 am: |
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The radial-plate corners sucsesfully bend in their new position,and now still waiting for better weather to place it.
In the meanwhile I be thinking what would be the "good reason" from Solarcon to place it on te lower end of the antenna,just curious...... |
Dale
Senior Member
Username: Dale
Post Number: 1855
Registered: 12-2002
| | Posted on Sunday, May 06, 2012 - 9:22 pm: |
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interesting. let us know how it worked for ya.
dale/a.k.a.hotrod
cef426
cvc#64
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Tech833
Moderator
Username: Tech833
Post Number: 2162
Registered: 8-2002
| | Posted on Sunday, May 06, 2012 - 10:02 pm: |
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Mechanically, it is better.
Your radio 'Mythbuster' since 1998
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Sq5ptw
New member
Username: Sq5ptw
Post Number: 1
Registered: 5-2012
| | Posted on Friday, May 11, 2012 - 2:03 pm: |
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Hi there. I have a question regarding GPK kit so I thought I might piggyback here if you don't mind :-)
When you say you'll bend radial-plate corners to reach 30 degrees do you acutally bend those towards the antena (upwards) or towards the mounting mast (downwards)? I'm going to install GPK on my Max2000 next week and was thinking about changing the angle of the radials but I'm not sure in which direction.
Getting to the bottom line - the goal of radial-plate corners bending is to have radials lowered (towards mast) or raised (towards antenna)?
Thanks and apologise if I hijacked your thread by a small bit :-) |
Tech833
Moderator
Username: Tech833
Post Number: 2163
Registered: 8-2002
| | Posted on Friday, May 11, 2012 - 10:33 pm: |
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The goal is to bend them "up". They should be 30 degrees below horizon.
Range testing showed a performance boost when the radials were at 30 degrees from horizontal rather than the 45 degrees (or more depending on your bracket) as they come stock.
Your radio 'Mythbuster' since 1998
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Starface
Senior Member
Username: Starface
Post Number: 3145
Registered: 1-2005
| | Posted on Saturday, May 12, 2012 - 2:14 am: |
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raised |
Sq5ptw
New member
Username: Sq5ptw
Post Number: 2
Registered: 5-2012
| | Posted on Saturday, May 12, 2012 - 7:18 am: |
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Thank you for a quick reply. Am I correct saying that raising the radials anywhere between 45 and 30 degrees (but closer to 30) below horizon will boost performance slightly or does it have to be 30 degrees rock solid? I don't think I'll be able to measure that precisely hence my question.
73! |
Press_man
Advanced Member
Username: Press_man
Post Number: 507
Registered: 5-2008
| | Posted on Saturday, May 12, 2012 - 8:11 pm: |
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Let's make a basic protractor. Useing a (for example)8 inch X 8 inch piece of paper or card board and laying it on a table so it's square on all four corners, fold the paper in half making a triangle. You now have a 90 degree side and a 45 degree side. Measure the 45 degree side and divide that by three and mark the paper at those measurements. Now you have at each pencil mark 30 degrees which is 30/60/90 degrees.
Just the rantings of an old template maker.
73
Pressman/KC4ZWM
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Tech833
Moderator
Username: Tech833
Post Number: 2164
Registered: 8-2002
| | Posted on Sunday, May 13, 2012 - 12:19 am: |
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Nice template, PM.
Just get there somewhere close to 30 degrees. it isn't critical.
Your radio 'Mythbuster' since 1998
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Press_man
Advanced Member
Username: Press_man
Post Number: 509
Registered: 5-2008
| | Posted on Sunday, May 13, 2012 - 11:33 am: |
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Thanks 833!
Any time I get into a project I end up making tools and or jigs or fixtures to work with. Just the nature of the beast. Even if I'm working with guy wires I end up trigging everything out. I still have a problem though remembering not to measure home repairs in hundredths or thousandths of an inch.
73
Pressman/KC4ZWM
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Sq5ptw
New member
Username: Sq5ptw
Post Number: 4
Registered: 5-2012
| | Posted on Monday, May 14, 2012 - 12:50 am: |
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Thanks to both of you. I'll put it up this week. |
Rinus558
New member
Username: Rinus558
Post Number: 4
Registered: 4-2012
| | Posted on Friday, August 31, 2012 - 8:27 am: |
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It has take some more time to get on the roof to place the GPK,but last week finaly placed.
The first inpressions are positive;the noise level dropped from S3 to almost O,now its possible to hear weak station local or DX.
The SWR is a little narrower but the 1:1.7 points are between 26.300 and 28.200.
Skip is also coming in earlyer I gues,because of the lowered TOA.
So finaly I think the(30 degrees)GPK will work in the positive way,and looks also great.
73`s from The Netherlands |
