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| Amateur Radio Antennas Discuss all types of antennas used to transmit or receive on amateur radio equipment. This includes base, handheld, mobile and repeater usage. |
09-06-2012, 11:12 PM
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Larsen antenna
I have been trying google searches and can't figure out if the Larsen 150/450/800 antenna will work for a dual band HT ham radio. I will be taking my test in a little over a week and I bought a HT radio to get started. I already have the Larsen on my truck now for my scanner and I also have a Radio Shack antenna I use to use but switched to the Larsen. I plan on getting a nice mobile after I get familiar with how everything works on the repeaters and will be switching the antenna I currently have back to the scanner and getting a nice dual band antenna for the mobile dual band radio. I will then drill holes and mount them to get away from the mag mounts.
So for the time being will the larsen work with a handheld radio?
Thanks and sorry if this has been asked before which I am sure it has several times but my searches didn't really bring up the answer.
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09-06-2012, 11:20 PM
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Amateur Radio
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Join Date: Jan 2006
Location: Bloomington,Illinois
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Quote:
Originally Posted by bubbamark
I have been trying google searches and can't figure out if the Larsen 150/450/800 antenna will work for a dual band HT ham radio. I will be taking my test in a little over a week and I bought a HT radio to get started. I already have the Larsen on my truck now for my scanner and I also have a Radio Shack antenna I use to use but switched to the Larsen. I plan on getting a nice mobile after I get familiar with how everything works on the repeaters and will be switching the antenna I currently have back to the scanner and getting a nice dual band antenna for the mobile dual band radio. I will then drill holes and mount them to get away from the mag mounts.
So for the time being will the larsen work with a handheld radio?
Thanks and sorry if this has been asked before which I am sure it has several times but my searches didn't really bring up the answer.
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Yes, it will work on your ht if it has the correct connector and while the triband is not the best possible choice it should work fair. The Larsen NMO 2/70 would be a better choice for the bands you want to use.
73,
n9zas
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"Whatever doesn't kill you...will make you stronger"! 
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09-06-2012, 11:56 PM
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I agree with the NMO 2/70 choice. Be aware that there are 3 versions of this antenna. Two are nearly identical, one has an open coil (2/70 B) and the other a closed coil (2/70 C), but otherwise they're nearly the same. The third version is the "short" version (2/70 SH) that has lower gain, but not as tall. They all work quite well, but the "short" version doesn't have quite the range.
Short version - Ham Radio Outlet | LARSEN NMO-2/70 SH | SHORT 2M/440 MOBILE ANT
Open coil version - Ham Radio Outlet | LARSEN NMO-2/70 BLACK | BLACK NMO-2/70 ANTENNA 2M/440
The tri-band you asked about will work, but will have higher SWR since it's cut for the commercial bands, not the ham bands. |
09-07-2012, 12:31 AM
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I use the Larsen 2/70, good antenna though the swr's are a little high on 70 cm for my liking. I use the open coil version simply because I don't want to have to worry about water contamination nor worry about said water freezing and potentially breaking the closed coil. Food for thought.
KF5QGF
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Craig N.
KF5QGF
Alinco DX70, Alinco 570, Baofeng UV-5R, RS Pro-404, RS Pro-163, Yaesu 2500,
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09-07-2012, 1:21 AM
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Ok thanks for the help everyone. I will look into the larsen antenna's as well.
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09-07-2012, 2:46 AM
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Hint, the names of larsen antennas are the bands/freqs it'll work on. As in the 2/70 works on 2 meters and 70 centimeters, and the 150/450/800 is 150 MHz, (2 meters) 450 MHz (70 cm) and 800 MHz (37 cm)
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Craig N.
KF5QGF
Alinco DX70, Alinco 570, Baofeng UV-5R, RS Pro-404, RS Pro-163, Yaesu 2500,
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09-07-2012, 4:06 AM
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Here is a sweep of the tri-band antenna:
One thing about it is that you must have a really good groundplane so it works correctly. No "L" brackets or magnet mounst allowed.
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Mark KS4VT
813A Czar
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09-07-2012, 7:24 AM
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The antenna you are talking about will work for ham radio but I would get the short Larson antenna with the coil I use This one and it works great it also has good gain for it's size ,good luck.......
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09-07-2012, 8:36 AM
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So you can transmit with the Larsen tri-band antenna? It is not a receive only antenna?
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09-07-2012, 11:01 AM
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Larson Antenna
The 150/450/800 antenna is NOT designed to transmit on the ham freqs. It is recieve only.
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09-07-2012, 12:11 PM
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You are right,it's not for tx only rx sorry about that,I was thinking about another antenna......
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09-07-2012, 12:29 PM
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Amateur Radio
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Quote:
Originally Posted by KS4VT
Here is a sweep of the tri-band antenna:
One thing about it is that you must have a really good groundplane so it works correctly. No "L" brackets or magnet mounst allowed. |
I have to correct my post as this is for the Laird Tri-Band WPD136M6C-001 antenna and not the Larsen. Sorry if I confused anyone. |
09-07-2012, 3:24 PM
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Quote:
Originally Posted by kb5zcs
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You are right,it's not for tx only rx sorry about that,I was thinking about another antenna......
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That's interesting since I know a local ham who does transmit on one of these, NMO permanently mounted to his trunk. I'll have to talk to him about the performance. 
73,
n9zas
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"Whatever doesn't kill you...will make you stronger"!
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09-07-2012, 4:04 PM
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According to the spec sheet for the antenna ( http://productfinder.pulseeng.com/pr...O150450800.pdf), it's rated for a transmit power of 50 watts. The rated bandwidth for 2.01:1 VSWR (or better) is only between the indicated ranges (150-165/450-470/800-960 MHz), which pretty much is outside the ham bands. |
09-07-2012, 5:11 PM
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I have several Larsen tri-band antennas and do use the occasionally for transmit. The match on 2m is not great, about 2:1 but it works similar to a 1/4 wave whip.
prcguy
Quote:
Originally Posted by n5ims
According to the spec sheet for the antenna ( http://productfinder.pulseeng.com/pr...O150450800.pdf), it's rated for a transmit power of 50 watts. The rated bandwidth for 2.01:1 VSWR (or better) is only between the indicated ranges (150-165/450-470/800-960 MHz), which pretty much is outside the ham bands. |
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09-07-2012, 6:54 PM
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Why suffer the design compromises that are inherent in a tri-band antenna when your radio is a dualbander? Do some more searching and find a dualband antenna and you'll be guaranteed of better results.
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09-07-2012, 7:10 PM
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I bought one last night. Thanks for the help.
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