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December 16, 2017, 07:08:23 AM
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CAP Talk  |  Operations  |  Emergency Services & Operations  |  Topic: Can the LH-16 121.5 antenna work with the MARK4 Sniffer receiver?
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Author Topic: Can the LH-16 121.5 antenna work with the MARK4 Sniffer receiver?  (Read 497 times)
Kallan09
Recruit

Posts: 12

« on: August 30, 2017, 01:44:47 PM »

My squadron is in need of a new DF unit and we are considering the Sniffer, however this will require an antenna. It would be great to use old resources but we are also willing to buy a specialty antenna too. From what I understand, the MARK4 operates best with 3 element antennas, the L-per is only 2, will this affect the search? Thanks!!
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JoeTomasone
Salty & Seasoned Contributor

Posts: 1,660

« Reply #1 on: August 30, 2017, 02:30:10 PM »

They do not work very well together at all.   It has nothing to do with the number of elements - though more is always better - but more with the design of the L-Per's antenna.

I'd recommend a handheld beam antenna.   Arrow Antennas makes a decent one cut for 121.5:
http://www.arrowantennas.com/arrowii/121.5-3ii.html

You could also make one (the "tape measure" antennas is inexpensive and popular, if somewhat aesthetically unpleasing). 

 
If you are going to buy a Sniffer, then consider picking up a mobile antenna as well for use in the vehicle.  L-Tronics used to sell an excellent one, but alas, no longer.   The Larsen "Larsen-MB-1-4" antenna here would seem to be a reasonable substitute:

https://www.cumulus-soaring.com/larsen.htm


I've DF'ed tons of ELTs with the Sniffer and both handheld and mobile antennas in the past and would be happy to discuss techniques with any interested units.

 
« Last Edit: August 30, 2017, 02:41:03 PM by JoeTomasone » Logged
Eclipse
Too Much Free Time Award
***
Posts: 28,080

« Reply #2 on: August 30, 2017, 09:27:17 PM »

We got the purpose-built antenna from RD4.

It's well-made and you can be sure it will work.

http://www.rdfantennas.com/index.php

« Last Edit: August 30, 2017, 09:30:55 PM by Eclipse » Logged

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CAP Talk  |  Operations  |  Emergency Services & Operations  |  Topic: Can the LH-16 121.5 antenna work with the MARK4 Sniffer receiver?
 


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