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  #21 (permalink)  
Old 12-27-2013, 1:54 PM
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Quote:
Originally Posted by reconrider8 View Post
Wow, that's an expensive mobile antenna, as antenna prices go. I read your bandspread and it should be okay (maybe ask them for advice on pruning the antenna to move resonance up a bit). If you're willing to spend that, it should be fine for you.

Personally, I've never had a mobile antenna work better than a ball-and-spring for low band. The other antennas work, but that ball-and-spring beats them for performance.
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Old 12-27-2013, 2:52 PM
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If you want to use an NMO mount you will want a base loaded antenna, MAXRAD are on E-bay for around $50-60. If you want to use a full 1/4 wave (as do most rural Police and Emergency services then you should get a three bolt mount with a whip cut to the closest freq. you want IE: 1/4 wave antenna is length in inches (L) = 2808 Divided by Frequency (Mhz)
39.5 Mhz = 71.0 inches, 46.0 Mhz = 61.04 inches etc
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Old 12-27-2013, 3:37 PM
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i just mainly want better mobile pickup for NCHP and i read up on the larsen and laird and what not lol to confusing
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Old 12-27-2013, 3:58 PM
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What do they use? most likely base loaded or 1/4
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Old 12-27-2013, 4:01 PM
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The Laird antenna you're looking at is $120.00 plus shipping.

Take a look at the stainless steel whip and the ball & spring mount that most State Police and Highway Patrol units use, and it will cost less.

CB Ham Radio HD Ball Swivel Antenna Mount Spring 102" | eBay

New 102 inch CB Ham Radio Antenna Stain Steel Whip | eBay

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Old 12-27-2013, 4:15 PM
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I saw something like that but Idk where I can mount it on my car
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Old 12-27-2013, 4:28 PM
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1. The center of the trunk (if your car has a trunk). Just what type of car do you have?

2. The side of the rear quarter panel (that's the spot where the MA State Police mount theirs).
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Old 12-27-2013, 6:06 PM
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I was looking at something that would fit on a trunk lip nmo mount
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Old 12-28-2013, 2:12 PM
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Oh, in that case I wouldn't try a 102 inch whip on a trunk lip mount. Too much pressure on such a small mount would be unsafe.

I do have an Austin Spectra with a trunk lip mount on my Malibu....but it's only 33 inches high.

I would go with the 102 inch with the spring mount if I wanted good reception of Low Band comms, but a smaller antenna would be best for your mounting situation.

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Old 12-28-2013, 4:08 PM
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yea i have a spectra as of now but i was trying to go better with like a larsen nmo40 or that laird that i was looking at... something with nmo mounts so i can use what i have already
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Old 12-28-2013, 5:20 PM
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Are you using the Spectra to monitor low band? Did you trim the top section to improve the low band reception? How did it work after you trimmed it?

I'm asking because I haven't cut mine at all, but don't listen to low band, so it doesn't matter.

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Old 12-28-2013, 9:10 PM
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Na I've never touched the top infact I've never touched it more then installing it
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Old 03-04-2014, 11:23 AM
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just received my nmo-40 and have it on my car and with the quick test i did i was still getting static channels that just sat there on 1/2 squelch. what do you guys do about those?
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Old 03-04-2014, 12:27 PM
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Quote:
Originally Posted by reconrider8 View Post
just received my nmo-40 and have it on my car and with the quick test i did i was still getting static channels that just sat there on 1/2 squelch. what do you guys do about those?
What kind of static is it? Is this a low-level signal that's always there, no matter what you do? Is it static artifact superimposed on stuff you're receiving? Is it static that's only there when the car is running, or when someone else passes you? Is it static that goes away when you turn the ignition off?

Each of those is a different thing.

The first one, a low level signal, might be birdies in the scanner.

The rest could be something being coupled in from your (or another vehicle's) spark ignition system, or automobile electronics/microprocessor-driven stuff. Or it could be from other sources, like something in the neighborhood.
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Old 03-04-2014, 12:36 PM
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car was off and it was mainly on the 30 bAnd once it got to 40 it went away. i was thinking maybe birdies but i didnt wanna lock out something that i may hear some traffic on
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