RadioReference on Facebook   RadioReference on Twitter   RadioReference Blog
 

Go Back   The RadioReference.com Forums > HF / MW / LW Monitoring > Receive Antennas (below 30MHz)

Receive Antennas (below 30MHz) - For all topics related to receive antennas used on HF, MW, LW, etc. For transmit antennas use the Amateur Radio Antennas forum.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 05-01-2017, 2:28 PM
Member
   
Join Date: Sep 2016
Location: Québec canada
Posts: 23
Default antenna question

i own a AOR LA 400 indoor loop antenna i was wondering when it is hot outside and no rain if i hang this from a tree about 10 feet off the ground would the reception be better.
Reply With Quote
Sponsored links
  #2 (permalink)  
Old 05-01-2017, 3:31 PM
Member
   
Join Date: Dec 2005
Location: East Devonport,Tasmania,Australia
Posts: 805
Default

When i had my aor la-400 loop couldnt even hear my local airport ndb which is 6 km from me it didnt matter indoor or outdoor sold it with no regret.

Regards Lino.
Reply With Quote
  #3 (permalink)  
Old 05-01-2017, 5:22 PM
Member
   
Join Date: Jul 2016
Location: Bothell, WA
Posts: 76
Default

I would agree with Lino in that wide-band loops purporting to work well on HF (and most of the RF spectrum) generally lack in performance. The AOR is extremely over-priced and its performance is questionable.

For HF you're better off buying a Wellbrook: North American Versions

For wideband monitoring you're better off with something like a discone: Diamond D3000N, D-3000N Discone Antenna
Reply With Quote
  #4 (permalink)  
Old 05-01-2017, 8:19 PM
Wiki Admin Emeritus
  Amateur Radio Operator
Amateur Radio
 
Join Date: Jul 2002
Location: Bowie, Md.
Posts: 20,367
Default

Actually you can get a bit cheaper than the Wellbrook - W6LVP has a loop that's almost 1/2 the price of the Pixel and Wellbrook antennas. And would you believe MFJ has one now too, that's about the same price range as W6LVP's? (just keep in mind that hams call MFJ 'Mighty Fine Junk' for a reason - some of their stuff is terrible...)

Besides the LA400 is not made to be outdoors. Not for a permanent mounting by any means. The 2 I just mentioned are. Here are the relevant links

MFJ Enterprises Inc.

https://www.w6lvp.com/product/amplif...ower-inserter/

Mike
__________________
links editor, Utility Monitoring Central
HF Forum moderator, RadioReference
Friends don't let friends buy Scancat Lite Plus!
Reply With Quote
  #5 (permalink)  
Old 05-01-2017, 8:27 PM
Wiki Admin Emeritus
  Amateur Radio Operator
Amateur Radio
 
Join Date: Jul 2002
Location: Bowie, Md.
Posts: 20,367
Default

The LA400 is way overpriced for what it purports to do - but don't let that sway you into thinking that wide band loops aren't any good. That's sheer and utter nonsense. There are many reviews out there of various Wellbrook (that have won several WRTH awards) and Pixel loops that say otherwise.

And here are over a dozen reviews (yes, user level, not really technical) of the W6LVP model (with the relay for transceivers which is meaningless for just receive performance)

W6LVP Receiving Amplified Loop with transmit/receive switchbox Product Reviews

Mike
__________________
links editor, Utility Monitoring Central
HF Forum moderator, RadioReference
Friends don't let friends buy Scancat Lite Plus!
Reply With Quote
Sponsored links
  #6 (permalink)  
Old 05-01-2017, 8:36 PM
Wiki Admin Emeritus
  Amateur Radio Operator
Amateur Radio
 
Join Date: Jul 2002
Location: Bowie, Md.
Posts: 20,367
Default

Here are a few more links with reviews, some of which from our Loops wiki .

Pixel Technologies Active Magnetic Loop Antenna PRO 1B Product Reviews

Review of the DoxyTronics 8020CA magnetic loop antenna | The SWLing Post

A preliminary review of the PK Loop C-LOOP-HDSW6-18 | The SWLing Post

Wellbrook ALA-1530 Active Magnetic Loop Antenna Product Reviews

Wellbrook ALA-330 active magnetic loop antenna Product Reviews

Now I'm not saying that a loop is a magic bullet for everyone, but it's quite clear that there are those that perform. Some of them are not nearly as expensive as a Pixel or Wellbrook.

Mike
__________________
links editor, Utility Monitoring Central
HF Forum moderator, RadioReference
Friends don't let friends buy Scancat Lite Plus!
Reply With Quote
  #7 (permalink)  
Old 05-03-2017, 3:31 AM
Member
   
Join Date: Sep 2012
Posts: 536
Default

I have no interest in a loop for HF but I'm curious as to the answer for OP's question: if he put the loop outside, as opposed to inside, and elevated it 10 feet or so up, would it work better than it does inside?

My guess it the answer would depend on whether he is on a second floor or not, and how much RFI he may need to avoid. At least, that would be the answer for most other indoor antennas (like the indoor wire I use presently).
Reply With Quote
  #8 (permalink)  
Old 05-03-2017, 8:44 AM
ridgescan's Avatar
Member
  Shack Photos
Shack photos
 
Join Date: Apr 2008
Location: San Francisco, Ca.
Posts: 4,047
Default

Quote:
Originally Posted by radiomancanada View Post
i own a AOR LA 400 indoor loop antenna i was wondering when it is hot outside and no rain if i hang this from a tree about 10 feet off the ground would the reception be better.
My stock answer to this is-you tell us! Go hang it up in that tree and see for yourself. Here at my QTH, experimentation is how I found what works best in my environment. This goes to what boombox said about your particular situation.
__________________
BC785D to Diamond D130J @50'
'54 SX-88 #127, IcomR71A, RS DX-160,Telefunken Opus7 to Wellbrook loop @50'
IcomR75 to 100' endfed wire/9:1 trans. @40'
RS Pro 2066 in truck to Larsen Tribander
Reply With Quote
  #9 (permalink)  
Old 05-03-2017, 3:52 PM
majoco's Avatar
Member
   
Join Date: Dec 2008
Location: New Zealand
Posts: 2,254
Default

I'm thinking of making something along these lines....

Loop Antenna.

I won't need the relay to desensitize it when I'm transmitting - mainly because I don't - and I was thinking about making the loop out of RG8 - just the connecting to the braid of course - maybe enclosing it in a extra layer of black irrigation hose which is UV resistant. I made a BC band loops a while ago which I don't use so the frame of that could come in handy....

https://forums.radioreference.com/at...cf1098-sml.jpg
__________________
Cheers - Martin ZL2MC - Palmerston North
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 9:00 PM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
All information here is Copyright 2012 by RadioReference.com LLC and Lindsay C. Blanton III.Ad Management by RedTyger
Copyright 2015 by RadioReference.com LLC Privacy Policy  |  Terms and Conditions