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 Post subject: What do you guys terminate a collinear DIY antenna with?
PostPosted: Fri Jul 07, 2017 4:17 am 
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J89eu - FlightAware user avatar

Joined: Thu Aug 18, 2016 1:59 pm
Posts: 9
Hi all

I built a collinear antenna and it works great but I have used F type connectors and they keep falling off the cable as it's not tight enough. I'd like to use N Type connectors as they seem the more solid alternative but these look to be even bigger and I'm not sure SMA will take the weight/movement whilst outside.

What is the general consensus for terminating the end of the array?

Also I've been looking at changing to a better cable quality now that I want the antenna on the roof as the cable run will be a good 10m-ish and found LMR400 seems to be recommended, can this be used for the entire array and cabling run as I may buy a reel and do the whole lot again.


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 Post subject: Re: What do you guys terminate a collinear DIY antenna with?
PostPosted: Fri Jul 07, 2017 5:05 am 
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SoNic67 - FlightAware user avatar

Joined: Fri Jun 16, 2017 7:44 pm
Posts: 62
Location: Newport News, Virginia, USA
You are probably using the wrong cable. RG59 is thinner than RG6, so the connector is different.
https://sewelldirect.com/learning-center/rg59-or-rg6


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 Post subject: Re: What do you guys terminate a collinear DIY antenna with?
PostPosted: Fri Jul 07, 2017 5:33 am 
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J89eu - FlightAware user avatar

Joined: Thu Aug 18, 2016 1:59 pm
Posts: 9
So would you recommend going with RG6 rather than LMR400? The price difference is substantial!


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 Post subject: Re: What do you guys terminate a collinear DIY antenna with?
PostPosted: Fri Jul 07, 2017 6:07 am 
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obj - FlightAware user avatar

Joined: Tue Sep 30, 2014 7:14 pm
Posts: 3659
The point is that you need F connectors that are designed for the cable diameter you're using.

Either F or N should be fine if they're properly installed. You don't really want to be putting mechanical stress on a connector regardless of what it is..

Lower loss cable is generally a good thing (look at the specs for loss at 1GHz, and beware that it's sometimes quoted per 100ft and sometimes per 100m) but whether it makes a big difference depends on the length of the cable run.


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 Post subject: Re: What do you guys terminate a collinear DIY antenna with?
PostPosted: Fri Jul 07, 2017 8:15 am 
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w7psk - FlightAware user avatar

Joined: Tue Jan 16, 2007 2:00 pm
Posts: 594
Location: KPAE
I use Crimp type F connectors. A lot more secure.


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 Post subject: Re: What do you guys terminate a collinear DIY antenna with?
PostPosted: Fri Jul 07, 2017 11:12 am 
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theresjam - FlightAware user avatar

Joined: Sat Feb 07, 2015 5:48 am
Posts: 98
twist the shielding braid together to form a tail. then push that tale backwards up the cable then attach the f-connector.

This will increase the diameter of the cable and the f connector may stay on. Its a abodge but it does work.


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 Post subject: Re: What do you guys terminate a collinear DIY antenna with?
PostPosted: Fri Jul 07, 2017 11:04 pm 
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SoNic67 - FlightAware user avatar

Joined: Fri Jun 16, 2017 7:44 pm
Posts: 62
Location: Newport News, Virginia, USA
AFAIK there is no F connector for the LMR400, only N:
http://www.awcwire.com/productspec.aspx ... connectors


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