I had Maine radio install my antennas and there all 1 ft apart
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Looking for the best nmo mount 2 meter antenna
- Thread starter ScanMaine
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W9DWP
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The 24 inch antenna spacing came from a Motorola FTR back many years ago. For many years I have used this for many installations of 2 way radios, scanners and CB radios. In my own cars and trucks as well as the 100's of installations I have done over the years of my 2 way radio carrier. I do realize that this spacing is not always possible, but I have found it to work most of the time. I have also tried to have a 1/4 wave spacing to the edge of the roof for an good ground plane for the antenna.. . . .
That looks like a clone of the broadband Antenna Specialists model I was talking about. I have to wonder how many recommending the 5/8 wave antennas are in hilly terrain. If you understand the physics, you would not recommend that for hilly areas. (I'm talking large hills - not those little anthills some in the midwest think are hills)
Yes, if you're in a flat area the 5/8 is better. If not, the 1/4 is better.
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kayn1n32008
ØÆSØ Say it, say 'ENCRYPTION'
I have to wonder how many recommending the 5/8 wave antennas are in hilly terrain. If you understand the physics, you would not recommend that for hilly areas. (I'm talking large hills - not those little anthills some in the midwest think are hills)
Yes, if you're in a flat area the 5/8 is better. If not, the 1/4 is better.
Does Eastern Alberta qualify as being flat? I have used 5/8 waves in both mountains and prairies... Either will work...
I admire your defiance of physical laws.
Yes, either will work. In hilly terrain, the 1/4 wave will work better due to the angle of radiation. You aren't pumping all the RF into the hillsides, but over them (or at least more over) where it may reach the repeater or other user. Even if you count reflections from the opposite side of the hill, you want a higher angle of radiation.
So, it really comes down to the fact there is no one "best" VHF antenna. There are several! Well, depending on your intended uses and local terrain.
I live near Los Angeles, which is in a basin surrounded by 5,000+ ft mountains all around with repeaters up high, down low and everything in betweeen. The only time a 1/4 wave whip on VHF has slightly outdone a Larsen 5/8 is right at the base of very tall mountains.
At all other times the 5/8 Larsen has an advantage with slightly more signal strength and slightly less noise in fringe areas. I live on the side (lower side) of an 1,100ft tall hill and the Larsen still works slightly better than a 1/4 wave to repeaters on top of my own hill.
I say get the 5/8 and don't worry about hills unless they are really big and you operate right up against them most of the time.
prcguy
At all other times the 5/8 Larsen has an advantage with slightly more signal strength and slightly less noise in fringe areas. I live on the side (lower side) of an 1,100ft tall hill and the Larsen still works slightly better than a 1/4 wave to repeaters on top of my own hill.
I say get the 5/8 and don't worry about hills unless they are really big and you operate right up against them most of the time.
prcguy
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You're good to go.
Ty
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