Here is an example of a DC Comp mobile with (3) 200 amp Leece Nevilles... others may look different, but its all the same theory... just wanted to let some of you guys know how much work really goes into the DC comp mobiles... maybe next week I will present the the AC mobile example...
and yes you can copy...
ENJOY!!
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Just an example of a Comp DC Mobile...
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Maverick
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dud muck
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Its good to document the details.
I think the red is +12v, green is (-)ground, and brown is +18v.
Is the green box the vehicle chassis?
I only ask because I see all the (-) from the batteries connected directly to this green box.
The chassis is carrying the (-) current between the batteries and the alternator OK?
If it were me, I would run black wires directly from the (-) batteries to the alternator mountings, that are sized the same as the (+) side.
or is that overkill?
I think the red is +12v, green is (-)ground, and brown is +18v.
Is the green box the vehicle chassis?
I only ask because I see all the (-) from the batteries connected directly to this green box.
The chassis is carrying the (-) current between the batteries and the alternator OK?
If it were me, I would run black wires directly from the (-) batteries to the alternator mountings, that are sized the same as the (+) side.
or is that overkill?
Unlimited power permitted on CH1 to CH27 as per FCC CFR 47 part 18: 18.305(a) and 18.301
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ww228kidd
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yep... just a tad bit over kill... copper is high these days to just add another wire in the truck...
the alternators are mounted and grounded to the frame welded and bolted on the motor then we have grounds comeing off the frame/motor going to the chassis... and yes the green is the chassis ground... then the batteries are also going to the chassis ground... another wire going all the way back is smaller than the chassis itself... so it would be over kill... and you have the colors correct...
the alternators are mounted and grounded to the frame welded and bolted on the motor then we have grounds comeing off the frame/motor going to the chassis... and yes the green is the chassis ground... then the batteries are also going to the chassis ground... another wire going all the way back is smaller than the chassis itself... so it would be over kill... and you have the colors correct...
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KW KID
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KW KID
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That is a crazy set up! I'm curious, as compared to a single antenna set up, (Like say using a single 10k antenna), how much more signal strength on the S meter would this antenna set up give you. I mean, how much is the most gain you've seen? Like if you hit the watergate S7 50 miles away with a single, what would you hit them with this antenna set up?
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ww228kidd
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well,,, its hard to say really because we test in our area with our own testing equipment... but its like going from an i-max to a set of 5 element beams.... you can take this setup barefooted and key against someone beside you with a good running 4 pill with one antenna and cut thier radio off.... on our setup that we test with.... with a truck 200 feet away with one antenna keying a dead key of 2 watts will not even budge the meter... with this setup from 0 to 10 it will put the needle on the 7 ... its really not the gain like in adding power with the antennas but its jsut taking almost all of your signal and driving it out the front of the truck... like using a sprinkler versus using a pressure washer...
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ww228kidd
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KW KID wrote:That is a crazy set up! I'm curious, as compared to a single antenna set up, (Like say using a single 10k antenna), how much more signal strength on the S meter would this antenna set up give you. I mean, how much is the most gain you've seen? Like if you hit the watergate S7 50 miles away with a single, what would you hit them with this antenna set up? prolly slap the wall
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Pillpopper
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I like this setup, but I am a little confused on whats "hot" and what antenna is the reflector. I am assuming the back 2 are hot and the others are for reflection?ww228kidd wrote:well, you asked for it.... and this where i will post it.... and the last time...
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TwentyTwo-Zero
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I would say that the coil antenna (center) is hot. There are wires (green) running from the two rear antennas to frame, and the extension on the front of the truck is also bonded to frame... 
Save Your Money, Don't Go To The Show
And Don't You Eat That Yellow Snow...Frank Zappa
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WR0220 Washington State 38LSB
CPI • Cobra • Icom • Yaesu
And Don't You Eat That Yellow Snow...Frank Zappa
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WR0220 Washington State 38LSB
CPI • Cobra • Icom • Yaesu
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TwentyTwo-Zero
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I would say that the coil antenna (center) is hot. There are wires (green) running from the two rear antennas to frame, and the extension on the front of the truck is also bonded to frame...
Save Your Money, Don't Go To The Show
And Don't You Eat That Yellow Snow...Frank Zappa
------------
WR0220 Washington State 38LSB
CPI • Cobra • Icom • Yaesu
And Don't You Eat That Yellow Snow...Frank Zappa
------------
WR0220 Washington State 38LSB
CPI • Cobra • Icom • Yaesu
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Pillpopper
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Ok, I see. I thought the green was coax 
So the coil is hot and you have 2 reflectors out back and 2 more reflectors out front..if I am seeing this right. Wouldn't the signal be blocked from the front and back So where is the signal going, off the sides? Just trying to figure out how this thing works
So the coil is hot and you have 2 reflectors out back and 2 more reflectors out front..if I am seeing this right. Wouldn't the signal be blocked from the front and back So where is the signal going, off the sides? Just trying to figure out how this thing works -
KW KID
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Two reflectors that are behind each other exactly makes NO SENSE in all antenna theory. Secondly, near field testing is of no usefulness for antenna testing when you are trying to improve far field performance. Thirdly, saying the signal will change from S7 to full scale, presumably 30 over S9 or 40db higher, can't happen even with the difference between a 1/4 wave 0db gain antenna versus the biggest 8 element Maco 500. I can't help but laugh at the thinking in the CB world sometimes. Just like I laugh at this website's censoring of the word "c o p per. because there is a company with the same name that sells cb stuff (but are not a sponsor).
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linx
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KW KID
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ww228kidd
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Two reflectors that are behind each other exactly makes NO SENSE in all antenna theory. Secondly, near field testing is of no usefulness for antenna testing when you are trying to improve far field performance. Thirdly, saying the signal will change from S7 to full scale, presumably 30 over S9 or 40db higher, can't happen even with the difference between a 1/4 wave 0db gain antenna versus the biggest 8 element Maco 500. I can't help but laugh at the thinking in the CB world sometimes.ww228kidd wrote:well, you asked for it.... and this where i will post it.... and the last time...
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some people can't figure **Censored** out on there own....
give the answer in color and what the heck they want to grip about it and call it stupid..
come on guys.... think about it...
green=what?
red=what?
grey= ok, i guess this one could get confusing... i will give you this one... grey=isolated
sometimes you have to test night after night and day after day to get the best results... then on top of all that... you try to help the lazy people by giving the answer and then they call you stupid and laugh...
but guess what....
who is begging for the answer and can't figure out color code....lol color by number was a beetch wasn't it?....lol
oh and by the way
YOU ARE WELCOME
WORLD WIDE SCOOBYDOO
AKA KIDD
AKA 228KID
BO/MADE COMMUNICATIONS!!!
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stagecoach
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the coil is not the hot ..........look again .........and while your laughing ??????? I'm sure you did ask???? but i can tell you that a 3pill in a similar system of 5 ant did and will cut a 16 pill off @ 25 miles note this 16 pill had 2 fighting stix still no match for a true dialed 5 ant system excellent post 228 kid keep up the positive post lots of info for those who do not understand r do not have the capability to understand how ant. can work if you spend enough time on them NOTE ANT.IS 70% OF THE GAME IF YOU HAVE A GOOD ANT SYSTEM THEN YOUR A THREAT NO MATTER WHERE YOU RUN R WHAT CLASS YOU RUN IN ................COACH
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Pillpopper
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No need to get all defensive, i am not bashing you or your setup by any means. I am just trying to figure this setup out. I run a comp mobile here as well and always open to new ideas, that is how we learn. I just dint understand how you can have a hot antenna sandwiched in between reflectors and still shoot forward? The reflectors should block the signal from going anywhere, especially forward.ww228kidd wrote:Two reflectors that are behind each other exactly makes NO SENSE in all antenna theory. Secondly, near field testing is of no usefulness for antenna testing when you are trying to improve far field performance. Thirdly, saying the signal will change from S7 to full scale, presumably 30 over S9 or 40db higher, can't happen even with the difference between a 1/4 wave 0db gain antenna versus the biggest 8 element Maco 500. I can't help but laugh at the thinking in the CB world sometimes.ww228kidd wrote:well, you asked for it.... and this where i will post it.... and the last time...
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some people can't figure **Censored** out on there own....
give the answer in color and what the heck they want to grip about it and call it stupid..
come on guys.... think about it...
green=what?
red=what?
grey= ok, i guess this one could get confusing... i will give you this one... grey=isolated
sometimes you have to test night after night and day after day to get the best results... then on top of all that... you try to help the lazy people by giving the answer and then they call you stupid and laugh...
but guess what....
who is begging for the answer and can't figure out color code....lol color by number was a beetch wasn't it?....lol
oh and by the way
YOU ARE WELCOME
WORLD WIDE SCOOBYDOO
AKA KIDD
AKA 228KID
BO/MADE COMMUNICATIONS!!!
Now what I do is very simple. 2 hot co-phased with 1 large reflector out back longer than the 2 hot. I know a lot of comp riggs may have 3-4 hot and one large reflector out back.
73's
Pillpopper
