Go Back   WorldwideDX Amateur Radio Forums > Citizens Band Related > CB Antennas

Amateur Callsign Lookup
Enter Callsign:

maco boomer ground plane kit

LinkBack Thread Tools Display Modes
Old 03-28-2010, 10:58 AM
Senior Member
iTrader: (1)
Join Date: Dec 2008
Posts: 215
JoeDirt is on a distinguished road

Originally Posted by Marconi View Post
Hey BM, this boomer kit is meant to replace the GPK on fiberglass antennas which have a base that is 1.25" in diameter. They will install on any antenna base mount that will accommodate the application.

You and Joe are right, however, if you want to extend the radials out to 105", like the V58, but Joe unless I read the facts wrong, I disagree. I think this boomer kit is shorter than the one on the V58.
Your right it said they are 7' elements!

Reply With Quote
Old 03-30-2010, 12:11 PM
Marconi's Avatar
Supporting Member
iTrader: (0)
Join Date: Oct 2005
Location: Houston & Corpus Christi
Posts: 4,022
Marconi is on a distinguished road

BM, I just posted some modeling work done by a local ham using Eznec demo version. Worldwide DX Amateur Radio Forums - Ham - CB - HF - VHF - UHF
BTW, the models are all listed backward, start with the last-first. Keith modeled a 1/4 and 1/2 wave end fed vertical, as well as several variations of 5/8 wave verticals with different radial lengths and angles. He also modeled the 5/8 with one, two, and 4 radials to see how that affected the RF gain, angle, and patten. He use to have these models on his Website, but the Website was redone and he mostly shows his other interest now. http://home.comcast.net/~nm5k/

He notes that he used the Eznec demo version, which allows very few segments to be used in modeling the elements and therefore the results may be skewed a bit compared to using the Pro version. Some of the models with increased gains shown may be due to his increasing the number of segments he was allow to use per element. For example, notice the nice increases when he modeled the 5/8 wave with only one and two radials he was able to increase the number of segments per element and still stay within the limit---which I think is 15 segments.

Without some type of real world testing, I would only take these results with a grain of salt, but Keith says these models support his real world applications and some other studies along the same lines. So, this gives me pause to think differently about using very long radials rather than shorter radials on the 5/8 wave radiator. I know that Bob85 and Multimode200 found increased signals when increasing the length of horizontal radials on the A99 and the knockoff version 200 used. I wish Keith had modeled the EFHW using radials too. I would like to see what that pattern looks like. This idea with 5/8 wave radiators may be more practical with higher frequency antennas however.

I would like to try out the two radial configuration, it looks easy with what I have here. The only problem is, the current distribution view he shows may well be the model he did in free space, because he does not show the support or feed line. This could mean that the view over average ground is no where near as good as suggested. I have called him several times and left a message that I wanted to talk to him, but he has not returned my calls.

Reply With Quote


ground plane radials, maco antenna
Worldwide Radio Forum

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
IMAX 2000 Ground Plane Kit... Robb CB Antennas 7 01-16-2012 01:45 AM
Crackling 60hz hum three channels in a row, every 4th channel clear as a bell. cominatyalive CB Band and CB Radios 97 01-28-2011 04:31 AM
isolation from mast Splash1 CB Antennas 71 03-17-2010 09:23 PM
assembly questions about maco 5/8 ground plane jrobinson CB Antennas 6 02-27-2009 09:47 PM
Ground Plane Kit Question this_is_nascar CB Antennas 4 01-01-2009 09:26 AM

All times are GMT -7. The time now is 06:48 AM.

Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0
Worldwide Radio Forum