Maxrad makes a base loaded quarterwave that looks like their other land
mobile offerings that covers the 10m band. I bought two with NMO style
mounts and they worked very well for 10m several years ago. The reason I
had two whips was one cut for the low end of the band and the other cut
for the FM portion. When 10m was open I had no problem working everyone I
heard.

The nice thing is that they are reasonably low profile--on the order of a
5/8 wave whip on 2m--and work very well with a typical NMO magnet mount
on the roof of my S-10 pickup.

Have fun!

- Nate

--

"The optimist proclaims that we live in the best of all possible worlds,
the pessimist fears this is true."

Simple! Mount a 1/4 wavelength vertical on a mount that is well fastened to the
bumper/frame with good ground straps or spot welded.

Forget about the whole CB thing of co-phasing.

Ten meter mobile is the easiest HF mobile installation you can ever do.

/s/ DD, W1MCE [50+ years active. 40+ years mobile]

KE5MBX wrote:

I have been advised by some hams that the best way I can hope to do 10-
meters on my jeep is to mount my antenna ON THE WINDSHIELD to get a
good ground plane. I read somewhere since then that the primary
reason for cophasing CB antennas on trucks is NOT to direct the gain
front and back, but to even the ground plane as though the antenna
were in the center of the truck. Could I achieve the same effect with
my Jeep by cophasing antennas on either side of the jeep by the
doors? Even better- could I do this diagonally across from one corner
of my jeep to the other? I heard the further apart the antennas are,
the better, and I'm not really trying to get front/back gain for DXing.

"KE5MBX" wrote in message
oups.com...
I have been advised by some hams that the best way I can hope to do 10-
meters on my jeep is to mount my antenna ON THE WINDSHIELD to get a
good ground plane. I read somewhere since then that the primary
reason for cophasing CB antennas on trucks is NOT to direct the gain
front and back, but to even the ground plane as though the antenna
were in the center of the truck. Could I achieve the same effect with
my Jeep by cophasing antennas on either side of the jeep by the
doors? Even better- could I do this diagonally across from one corner
of my jeep to the other? I heard the further apart the antennas are,
the better, and I'm not really trying to get front/back gain for DXing.

When it is all said and done, *I* would go with a single 102" whip cut for
10 Meters and mounted via ball mount on the left rear fender. This will
work well, it is simple, and you will not be able to measure any appreciable
benefit as to pattern or gain with any phasing arrangement. The thing about
"cophasing" is more hype from the CB world (gullible people buy MORE
antennas if they think some gadget will work better )! To each his own,
but I wouldn't go to all the trouble.

73

K4KWH

On Feb 3, 9:59 pm, "Jerry" wrote:
"KE5MBX" wrote in message

oups.com...

I have been advised by some hams that the best way I can hope to do 10-
meters on my jeep is to mount my antenna ON THE WINDSHIELD to get a
good ground plane. I read somewhere since then that the primary
reason for cophasing CB antennas on trucks is NOT to direct the gain
front and back, but to even the ground plane as though the antenna
were in the center of the truck. Could I achieve the same effect with
my Jeep by cophasing antennas on either side of the jeep by the
doors? Even better- could I do this diagonally across from one corner
of my jeep to the other? I heard the further apart the antennas are,
the better, and I'm not really trying to get front/back gain for DXing.

When it is all said and done, *I* would go with a single 102" whip cut for
10 Meters and mounted via ball mount on the left rear fender. This will
work well, it is simple, and you will not be able to measure any appreciable
benefit as to pattern or gain with any phasing arrangement. The thing about
"cophasing" is more hype from the CB world (gullible people buy MORE
antennas if they think some gadget will work better )! To each his own,
but I wouldn't go to all the trouble.

73

K4KWH



All right, all right. I'm thinking about maybe just using the CB whip
ball mount I currently have on the front/left fender. If anyone can
think of a good reason to charge ahead with the cophased stuff,
"please come with your call sign".

73, and thanks so much for all the inputs

Nelson Blaha KE5MBX

Jerry wrote:
"KE5MBX" wrote in message
oups.com...
I have been advised by some hams that the best way I can hope to do 10-
meters on my jeep is to mount my antenna ON THE WINDSHIELD to get a
good ground plane. I read somewhere since then that the primary
reason for cophasing CB antennas on trucks is NOT to direct the gain
front and back, but to even the ground plane as though the antenna
were in the center of the truck. Could I achieve the same effect with
my Jeep by cophasing antennas on either side of the jeep by the
doors? Even better- could I do this diagonally across from one corner
of my jeep to the other? I heard the further apart the antennas are,
the better, and I'm not really trying to get front/back gain for DXing.

When it is all said and done, *I* would go with a single 102" whip cut for
10 Meters and mounted via ball mount on the left rear fender.

Then it wouldn't be 102 inches any more... Sorry, I couldn't help it...;^)


This will
work well, it is simple, and you will not be able to measure any appreciable
benefit as to pattern or gain with any phasing arrangement. The thing about
"cophasing" is more hype from the CB world (gullible people buy MORE
antennas if they think some gadget will work better )! To each his own,
but I wouldn't go to all the trouble.

Nelson, I would agree with Jerry as to the antenna choice. Cophasing
won't do much for ya, and halfwave is getting out of hand for 10 meters
mobile.

As a thought, in amateur mobile, where Ops are trying to pull out every
last bit of efficiency, the cophase antenna just isn't to be seen. The
biggest problem with them is that the logic is almost irresistible. Two
antennas just *seem* like they would be so much better than one.

That being said, experimentation is great fun, and you can get mobile
antenna parts at hamfests, or even make your own.

- 73 de Mike KB3EIA -

Michael Coslo wrote:
Jerry wrote:
When it is all said and done, *I* would go with a single 102" whip cut
for 10 Meters and mounted via ball mount on the left rear fender.

Then it wouldn't be 102 inches any more... Sorry, I couldn't help
it...;^)

Actually, a 102 inch whip has a feedpoint resistance
closer to 50 ohms than does a 98 inch whip. A series
cap will get rid of the inductive reactance and then
one does have a fully function 102 inch 10m whip.
--
73, Cecil http://www.w5dxp.com

"Michael Coslo" wrote in message
...
Jerry wrote:
"KE5MBX" wrote in message
oups.com...
I have been advised by some hams that the best way I can hope to do 10-
meters on my jeep is to mount my antenna ON THE WINDSHIELD to get a
good ground plane. I read somewhere since then that the primary
reason for cophasing CB antennas on trucks is NOT to direct the gain
front and back, but to even the ground plane as though the antenna
were in the center of the truck. Could I achieve the same effect with
my Jeep by cophasing antennas on either side of the jeep by the
doors? Even better- could I do this diagonally across from one corner
of my jeep to the other? I heard the further apart the antennas are,
the better, and I'm not really trying to get front/back gain for DXing.

When it is all said and done, *I* would go with a single 102" whip cut
for 10 Meters and mounted via ball mount on the left rear fender.

Then it wouldn't be 102 inches any more... Sorry, I couldn't help it...;^)

NOW CUT THAT OUT!! Just because I was about to go to bed when I posted
that........................LOL!


73

Jerry
- 73 de Mike KB3EIA -

I have been advised by some hams that the best way I can hope to do 10-
meters on my jeep is to mount my antenna ON THE WINDSHIELD to get a
good ground plane. I read somewhere since then that the primary
reason for cophasing CB antennas on trucks is NOT to direct the gain
front and back, but to even the ground plane as though the antenna
were in the center of the truck. Could I achieve the same effect with
my Jeep by cophasing antennas on either side of the jeep by the
doors? Even better- could I do this diagonally across from one corner
of my jeep to the other? I heard the further apart the antennas are,
the better, and I'm not really trying to get front/back gain for DXing.



Not sure of the mounting issues on your Jeep, but have you considered a
Halo?

Ed K7AAT