RadioReference on Facebook   RadioReference on Twitter   RadioReference Blog
 

Go Back   The RadioReference.com Forums > Commercial and Professional Radio > Commercial Radio Antennas

Commercial Radio Antennas Please keep discussion related to professional, commercially used antennas and antenna systems for the two-way radio industry. Topics for the use of these antennas on amateur bands are accepted here.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 03-26-2012, 10:42 PM
Member
  Premium Subscriber
Premium Subscriber
 
Join Date: May 2010
Location: North Dakota
Posts: 40
Default dual band antenna

hi all i am currently using Laird C150450C dual band mobile antennas they work decent but they seem to have an extremly narrow band with i operate between 152-157mhz on vhf and on Uhf 463-469 and i cant seeem to get a satisfactory SWR for more than one mhz at the most and Suggestions
Reply With Quote
Sponsored links
  #2 (permalink)  
Old 03-30-2012, 7:36 PM
Member
   
Join Date: Mar 2010
Posts: 183
Default

Give us some more info...what are your SWR readings, antenna placement, Tx power, etc so we have a little bit more background to go by.
Reply With Quote
  #3 (permalink)  
Old 03-30-2012, 9:08 PM
bwca44's Avatar
Member
  Premium Subscriber
Premium Subscriber
 
Join Date: Nov 2009
Location: Dakota Territory
Posts: 175
Default

Are you looking for a dual band commercial style antenna that words on HAM freqs? I have looked for ages, and never did find much that I liked. (I was looking for something that is short and BLACK) impossible to find.
__________________
EMT
Reply With Quote
  #4 (permalink)  
Old 03-31-2012, 12:00 AM
Member
  Premium Subscriber
Premium Subscriber
 
Join Date: May 2010
Location: North Dakota
Posts: 40
Default reply

hey sorry for lack of info i mainly transmit in the 152 mhz, and the 157 mhzs and 462-469 mhz s i have the antenna smack dab in the middle of my roof its a 3/4 inch nmo mount my swr is about 1:3 :1 on 151mhz and 469mhz when i go up or down channels for example when i use talk around i talk on 464 mhzs and my swr is past 2:1 :1 i can ajust the antenna to work on any of them freqs but its like the antenna bandwith is only 1 Mhz wide at the most
Reply With Quote
  #5 (permalink)  
Old 03-31-2012, 8:21 AM
Member
   
Join Date: Sep 2004
Location: NJ USA (Republic of NJ)
Posts: 2,817
Default

Quote:
Originally Posted by 327skidoo View Post
hey sorry for lack of info i mainly transmit in the 152 mhz, and the 157 mhzs and 462-469 mhz s i have the antenna smack dab in the middle of my roof its a 3/4 inch nmo mount my swr is about 1:3 :1 on 151mhz and 469mhz when i go up or down channels for example when i use talk around i talk on 464 mhzs and my swr is past 2:1 :1 i can ajust the antenna to work on any of them freqs but its like the antenna bandwith is only 1 Mhz wide at the most
If you are going to need that kind of band width a 1/4 wave antenna for
each band would probably better suit your needs.
__________________
fineshot1
NJ USA
Reply With Quote
Sponsored links
        
  #6 (permalink)  
Old 04-25-2012, 4:18 PM
Pat Pat is offline
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Dec 2002
Location: Tomah, WI
Posts: 30
Default

bwca44: check out this antenna: http://comtelco.net/PDF/A1531.PDF

I've been using one for my dual-band amateur radio and it seems to work pretty decently. It's only around 19" tall and you can order it with a black finish. Initially I had the Larsen NMO2/70SH but it corroded quite quickly due to road salt.

Pat
Reply With Quote
  #7 (permalink)  
Old 04-25-2012, 8:52 PM
bwca44's Avatar
Member
  Premium Subscriber
Premium Subscriber
 
Join Date: Nov 2009
Location: Dakota Territory
Posts: 175
Default

Pat: thanks so much for the info, even though the thread is older I have still been looking for a black dual band antenna! Im currently rolling with a black larson vhf (actually two, I have a VHF 1/4 wave for the scanner) Here in South Dakota the winter was pretty mild, so the salt didnt eat it to much.
__________________
EMT
Reply With Quote
  #8 (permalink)  
Old 04-26-2012, 8:37 AM
tfhphoto's Avatar
Member
   
Join Date: Jul 2005
Location: Sioux City
Posts: 65
Default

If you are looking for a broad-banded dual band antenna, I'd suggest the Comet CA-2x4SR. I have two of them (one on scanner and one on dual band ham radio). They are available in black. RX on 800 Mhz is respectable.

In my testing, SWR is only very slightly worse than a 5/8 Larson VHF cut for 155.xxx. Haven't compared vs 5/8 on UHF.

According to Comet:

1.5:1 or less SWR: 144-148/440-450MHz
2:1 or less SWR: 140-160/435-465MHz
Gain: 3.8/6.2dBi

The downside is that they aren't especially pretty. Upside, they are very good performers for what they are.
Reply With Quote
  #9 (permalink)  
Old 05-06-2012, 10:16 AM
902's Avatar
902 902 is offline
Member
  Premium Subscriber
Premium Subscriber
 
Join Date: Nov 2003
Location: Downsouthsomewhere
Posts: 1,518
Default

Maxrad used to make several wideband gain antennas in the 90s, but there have been so many industry changes since then, and LMR antennas seem to have been sidelined for cellular and wireless data development. IF you could find a broadband VHF antenna (the one I'm thinking of is a 5/8 wave with a stiff sleeve above a spring) and a broadband UHF antenna (also a stiff sleeve above the spring and up to about an inch below the coil), you can use a small cross-band coupler (mistakenly called a "duplexer" in some circles) to go back to your one radio... if that's what you have. I don't think there is a broadband dualband antenna made. There is also a VHF unity gain broadband antenna which has a 10 MHz spread. Good luck - and if you find such an animal - please post it.
Reply With Quote
Sponsored links
  #10 (permalink)  
Old 05-06-2012, 4:14 PM
RodStrong's Avatar
Member
  Shack Photos
Shack photos
 
Join Date: Nov 2007
Posts: 1,013
Default

If you are gonna break it down to two antennas, I would recommend the PCtel/Maxrad MWV1365S

PCTEL Maxrad MWV1365S 136-174 Wideband Antenna | TESSCO

and its sister UHF model, the MWU4505S

https://www.tessco.com/products/disp...80&eventPage=1

Good luck.
Reply With Quote
  #11 (permalink)  
Old 05-07-2012, 12:32 PM
902's Avatar
902 902 is offline
Member
  Premium Subscriber
Premium Subscriber
 
Join Date: Nov 2003
Location: Downsouthsomewhere
Posts: 1,518
Default

I found the antennas I was thinking about:

MWB4505 - UHF (42 MHz wide) 5 dB gain
MWB5803 - VHF high band (18 MHz wide) 3 dB gain
MWBDC4700 - VHF low band (5 MHz wide) unity gain

from PCTel Maxrad. The bandwidth is between 2:1 SWR points. Not sure if they're made anymore, although I was able to find the UHF one on some websites. The VHF ones would make a powerful klong as they hit the branches.
Reply With Quote
  #12 (permalink)  
Old 05-07-2012, 8:04 PM
Member
   
Join Date: Sep 2004
Location: NJ USA (Republic of NJ)
Posts: 2,817
Default

We have been using these on uhf and they perform very well and
also physically hold up pretty well also, except for when the *%$#@
forgets to NOT drive into the parking garage.

PCTEL Maxrad MWU4002S 380-520 2.0/0 dB Antenna | TESSCO
__________________
fineshot1
NJ USA
Reply With Quote
  #13 (permalink)  
Old 05-08-2012, 11:51 AM
902's Avatar
902 902 is offline
Member
  Premium Subscriber
Premium Subscriber
 
Join Date: Nov 2003
Location: Downsouthsomewhere
Posts: 1,518
Default

Quote:
Originally Posted by fineshot1 View Post
We have been using these on uhf and they perform very well and
also physically hold up pretty well also, except for when the *%$#@
forgets to NOT drive into the parking garage.

PCTEL Maxrad MWU4002S 380-520 2.0/0 dB Antenna | TESSCO
Isn't that what the lightbar is for - so you don't end up damaging the antennas by going into the parking garage?
Reply With Quote
  #14 (permalink)  
Old 05-08-2012, 2:10 PM
Member
   
Join Date: Sep 2004
Location: NJ USA (Republic of NJ)
Posts: 2,817
Default

Quote:
Originally Posted by 902 View Post
Isn't that what the lightbar is for - so you don't end up damaging the antennas by going into the parking garage?
Unfortunately I get dragged into trying to fix those also. Once one of them
drove up to our shop with the thing hanging off the side of the vehicle only
being held on by the multi-wire cable.
__________________
fineshot1
NJ USA
Reply With Quote
  #15 (permalink)  
Old 05-08-2012, 8:29 PM
ramal121's Avatar
Member
  Shack Photos
Shack photos
Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Dec 2008
Location: Sonoma, CA
Posts: 1,091
Default

Quote:
Originally Posted by fineshot1 View Post
Unfortunately I get dragged into trying to fix those also. Once one of them
drove up to our shop with the thing hanging off the side of the vehicle only
being held on by the multi-wire cable.
FS Vectors sail like a hang glider when you forget the hooks (friggin' installers).

VIA TAPATALK
Reply With Quote
Sponsored links
        
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 5:37 PM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
All information here is Copyright 2012 by RadioReference.com LLC and Lindsay C. Blanton III.Ad Management by RedTyger
Copyright 2011 by RadioReference.com LLC Privacy Policy  |  Terms and Conditions