10 meter 11 meter antenna interaction
 

OK, the next problem I will be haveing is The interaction between my 10
meter whip and the 11 meter whip.
Removeing the CB is not an option, I need it for work.

I will be adding the 10 meter whip to a 4door Dodge ram pickup.The two
antennas that are on the truck now are mounted with stake hole mounts (the
holes in the bed rail behind the driver and passenger)

The 11 meter and the 10 meter rigs will not be on at the same time.

How would you place the antennas to keep the interaction as low as possible
or use the ineraction in some way.

Thanks
joe

10 meter 11 meter antenna interaction
 

What you've got is one antenna with two feed points.

Any use of the interaction will result in a directional pattern, making
the signal stronger in some directions and weaker (perhaps a great deal
weaker) in others. I suspect you don't want that.

The best solution would be to open-circuit the unused antenna at its
feedpoint. This could be done directly with a relay, by short-circuiting
the rig end of a feedline which is an odd number of electrical
wavelengths long, or open-circuiting the rig end of a feedline which is
an integral number of half wavelengths long. It would be a good idea to
make the switch(es) operate from the rigs' power, to prevent
accidentally transmitting into a shorted or opened feedline.

The two bands are too close to make most other methods impractical.

Roy Lewallen, W7EL

Merlin-7 KI4ILB wrote:
OK, the next problem I will be haveing is The interaction between my 10
meter whip and the 11 meter whip.
Removeing the CB is not an option, I need it for work.

I will be adding the 10 meter whip to a 4door Dodge ram pickup.The two
antennas that are on the truck now are mounted with stake hole mounts (the
holes in the bed rail behind the driver and passenger)

The 11 meter and the 10 meter rigs will not be on at the same time.

How would you place the antennas to keep the interaction as low as possible
or use the ineraction in some way.

Thanks
joe

10 meter 11 meter antenna interaction
 

"Merlin-7 KI4ILB" wrote in
:

OK, the next problem I will be haveing is The interaction between my 10
meter whip and the 11 meter whip.
Removeing the CB is not an option, I need it for work.

I will be adding the 10 meter whip to a 4door Dodge ram pickup.The two
antennas that are on the truck now are mounted with stake hole mounts
(the holes in the bed rail behind the driver and passenger)

The 11 meter and the 10 meter rigs will not be on at the same time.

How would you place the antennas to keep the interaction as low as
possible or use the ineraction in some way.

Thanks
joe



Breaker, Breaker, good-buddy, got yer ears on?

Get rid of the eleven meter rig and antenna. Be a ham, not a CB'er, or
are you too lazy to learn and use CW?

SC

10 meter 11 meter antenna interaction
 

Slow Code wrote:
"Merlin-7 KI4ILB" wrote in
:


OK, the next problem I will be haveing is The interaction between my 10
meter whip and the 11 meter whip.
Removeing the CB is not an option, I need it for work.

I will be adding the 10 meter whip to a 4door Dodge ram pickup.The two
antennas that are on the truck now are mounted with stake hole mounts
(the holes in the bed rail behind the driver and passenger)

The 11 meter and the 10 meter rigs will not be on at the same time.

How would you place the antennas to keep the interaction as low as
possible or use the ineraction in some way.

Thanks
joe




Breaker, Breaker, good-buddy, got yer ears on?

Get rid of the eleven meter rig and antenna. Be a ham, not a CB'er, or
are you too lazy to learn and use CW?

SC


Sc;

The man said he uses CB for his work not his play. Either help him or
get lost.

Dave WD9BDZ

10 meter 11 meter antenna interaction
 

Merlin-7 KI4ILB wrote:
The 11 meter and the 10 meter rigs will not be on at the same time.
How would you place the antennas to keep the interaction as low as possible
or use the ineraction in some way.

Avoid any interaction at all by switching in a 330 pf
series capacitor for 10m operation and use one vertical
for both bands.

But before you do anything, measure the SWR of that
102 inch vertical on 10m. EZNEC says it will be only
about 1.5:1, close enough to a match for most people.

Or compromise and cut the vertical to resonance on a
frequency half way between 11m and 10m. I'll bet the
SWR will be acceptable on both bands.
--
73, Cecil http://www.w5dxp.com

10 meter 11 meter antenna interaction
 

It seems you were to lazy to find out that I already passed my code class.
For your information I use the CB to talk to truckers when I go into areas
Hit by hurricanes.
I was in gulf port mississippi 2 days after the hurricane hit that area
last year. The year befor I was in Florida 2 days after the hurricanes hit.
You see I dry out flooded buildings ...mostly hospitals...BTW I gave My 2
meter rig to the local EOC in gulf port last year. They needed it more than
I did.

So I use the CB to find out what roads are open, where the last place to
get fule is etc. We haul in most of our own fuel but we have to be able to
get fule for our big generators... And we also use the CB to talk to each
other on the road. we have had convoys of over 20 trucks ....

So the CB has to stay...
Joe


Breaker, Breaker, good-buddy, got yer ears on?

Get rid of the eleven meter rig and antenna. Be a ham, not a CB'er, or
are you too lazy to learn and use CW?

SC

10 meter 11 meter antenna interaction
 

Merlin-7 KI4ILB wrote:
It seems you were to lazy to find out that I already passed my code class.
For your information I use the CB to talk to truckers when I go into areas
Hit by hurricanes.
I was in gulf port mississippi 2 days after the hurricane hit that area
last year. The year befor I was in Florida 2 days after the hurricanes hit.
You see I dry out flooded buildings ...mostly hospitals...BTW I gave My 2
meter rig to the local EOC in gulf port last year. They needed it more than
I did.

So I use the CB to find out what roads are open, where the last place to
get fule is etc. We haul in most of our own fuel but we have to be able to
get fule for our big generators... And we also use the CB to talk to each
other on the road. we have had convoys of over 20 trucks ....

So the CB has to stay...
Joe


Breaker, Breaker, good-buddy, got yer ears on?

Get rid of the eleven meter rig and antenna. Be a ham, not a CB'er, or
are you too lazy to learn and use CW?

SC




Joe;

I was wondering what you did for hurricanes.

Don't get to upset over Slow Code. It seems that he has a problem. Just
exactly what it is I don't know but he has one. This is his way of
working off his aggressions generated by those problems.

Keep up the good work and I hope you go broke. HI HI....
Just kidding.

Dave WD9BDZ

10 meter 11 meter antenna interaction
 

"Merlin-7 KI4ILB" wrote in message
...
It seems you were to lazy to find out that I already passed my code class.
For your information I use the CB to talk to truckers when I go into areas
Hit by hurricanes.
I was in gulf port mississippi 2 days after the hurricane hit that area
last year. The year befor I was in Florida 2 days after the hurricanes
hit.
You see I dry out flooded buildings ...mostly hospitals...BTW I gave My 2
meter rig to the local EOC in gulf port last year. They needed it more
than
I did.

So I use the CB to find out what roads are open, where the last place to
get fule is etc. We haul in most of our own fuel but we have to be able to
get fule for our big generators... And we also use the CB to talk to each
other on the road. we have had convoys of over 20 trucks ....

So the CB has to stay...
Joe

Disregard that idiot. If it were up to him, we'd give up all voice
communication and bang code out on each other's heads like cavemen. Of
course, that really sounds like a novel idea to try on S-L-O-O-O-W Code.

10 meter 11 meter antenna interaction
 

Slow Code wrote:


Breaker, Breaker, good-buddy, got yer ears on?

Get rid of the eleven meter rig and antenna. Be a ham, not a CB'er, or
are you too lazy to learn and use CW?

SC

I guess you are a slow reader too. He already says he needs it for
work. Get a grip. Get a life. Go work some slow CW. Whatever..
Just go somewhere else to blather on about CW. I'd probably smoke
your lame ass at CW. Do you see me whining about your "slow code"?
Nope. This ain't the place for it.
MK

10 meter 11 meter antenna interaction
 

"U-Know-Who" wrote in
:

Disregard that idiot. If it were up to him, we'd give up all voice
communication and bang code out on each other's heads like cavemen. Of
course, that really sounds like a novel idea to try on S-L-O-O-O-W Code.



No, you can still have your microphone but you should be forced to pass
a code test before you're allowed to use it. I like 5 WPM for Tech, 13
for General, and 20wpm for Extra, but then, I'm not lazy.

SC