Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


296 posts

Ultimate Geek
+1 received by user: 5


Topic # 24660 30-Jul-2008 11:16
Send private message

I put my my rusty Sky UHF atenna last week pointing at Waitarua.  I get about 50% signal strength and 100% quality on the Freeview HD signals.
I had prelaid Quad sheild RG6 so I am fine with the cabling.  However would like to get a better antenna, as the current sky one is rusty and I think one mount for the connector box is broken.

Should I get antenna with more elements i.e. a 43 element?  can the original Sky mount hold this?

Current Sky one I have is this.


Whats this like? Although has less elements.




My opinions and ideas expressed in posts are solely my own and do not reflect the views of my employer in any way..


Create new topic
476 posts

Ultimate Geek
+1 received by user: 2

Subscriber

  Reply # 152673 30-Jul-2008 12:58
Send private message

although I am not an expert but having much hands on experiance but I believe that the type and style of antenna are directly related to where you are located and from what transmission tower you are recieving from. Sometimes getting a larger antenna or an antenna with additional "director" elements would give you no better performance that one with less apart from the fact you just spent more money. The key factor is condition of the antenna, connectors and cable. if you check with a local supplier they could give you more accurate information. FYI where i live we only have one like yours but on the other side of town they have the 12 element type as they recieve the signal from another location, signal strangth is 70% ( i can see the repeater from my roof) 100% quality


104 posts

Master Geek


  Reply # 152674 30-Jul-2008 13:02
Send private message

I have one of these http://www.dtvs.co.nz/index.php?main_page=product_info&cPath=3&products_id=18 

and it's nice, really well packaged and easy to put together, where I live i'm very exposed to the weather and this thing hasn't even moved it's great.



296 posts

Ultimate Geek
+1 received by user: 5


  Reply # 152680 30-Jul-2008 13:20
Send private message

I live out west Auck, Blockhouse Bay... I can see the Waitarua tower.  Which is where the rusty Sky one is pointing at.
So I go for one with more elements, is there a possiblity of overpowering i.e. too much signal.




My opinions and ideas expressed in posts are solely my own and do not reflect the views of my employer in any way..


183 posts

Master Geek


  Reply # 152711 30-Jul-2008 15:25
Send private message

I'm pretty sure a higher gain uhf aerial wont cause probs. But it will be a waste of moeny if it doesnt fix your signal issue. But you know rusty aerial can never be a good thing.


476 posts

Ultimate Geek
+1 received by user: 2

Subscriber

  Reply # 152713 30-Jul-2008 15:33
Send private message

JaBZ: I live out west Auck, Blockhouse Bay... I can see the Waitarua tower.  Which is where the rusty Sky one is pointing at.
So I go for one with more elements, is there a possiblity of overpowering i.e. too much signal.


There is not such a thing as overpowering, but as stated in the above post you would pay more for no additional signal, the elements trap and direct what signal it detects to the reflector and diapole, if the signal is weak additional elements recieve as much as possible, if you have a very strong signal you dont require as many director elements, in this case bigger does not mean better, in the future if you shifted location and signal was low, having bought the larger one you would protect yourself slightly. just a note on overpowering, what you can get if the signal is extremely strong is that it can interfer with nearby freqencies washing out the poorer signal, ie you get a ghost image from a different channel but that is not as common with the current techology

1539 posts

Uber Geek
+1 received by user: 39

Trusted

  Reply # 152717 30-Jul-2008 15:53
Send private message

I have one of these in Hawkes Bay  http://www.lincrad.co.nz/pshow.php?category_id=90&sub_cid=87&cat_name=&sub_cat_name=%27Gizmo%27%20%20-digital%20ready-%20%20aerials


Never had a problem with it, I get 94% signal

6182 posts

Uber Geek
+1 received by user: 242

Trusted
Subscriber

  Reply # 152723 30-Jul-2008 16:07
Send private message

Hi just because you have only 50% signal means nothing, 100% quality is more important. Because it is 100% (lets forget the absolute accuracy of the metering for now) then increasing the signal to 90 or 100% wont improve the picture on bit.


The typical Sky installed UHF antenna will only rust on the reflector, and unless its actually fallen off is unlikely to significantly effect performance. It is an advantage to replace the antenna with one with a better contructed balun and preferabley an Fconnector balun.

The one shown that you currently have is really only a 7element antenna (by Yagi description) not a 23element, its just 7 electrical elements made from 23 parts. Might I suggest one of these .

Cyril

6642 posts

Uber Geek
+1 received by user: 552

Trusted

  Reply # 152908 31-Jul-2008 09:58
Send private message

Yeah most UHF aerials/ aerials in general are made of aluminium so they don't rust.  The screws/clamps etc holding them in place usually rust and sometimes the plastic or the aluminium of the individual elements breaks as well. 

The big thing as Cyril has mentioned is the part where the RG6 Coax cable is attached to the balun.  If this is damp and rusted then you're going to have a problem right there.  You would notice an improvement by unscrewing the cable and lightly sanding away any rust at the connection part.  Replacing this with a F crimp connector type would be a great upgrade to most older existing UHF aerials.

Cyril, where can you suggest getting these F crimp balun parts from, they're not that common!  Cheers.

6182 posts

Uber Geek
+1 received by user: 242

Trusted
Subscriber

  Reply # 152909 31-Jul-2008 10:04
Send private message

I have a collection, PM.

Cyril



296 posts

Ultimate Geek
+1 received by user: 5


  Reply # 153422 1-Aug-2008 19:51
Send private message

Speaking of F connectors, when i called Hills-Signalmaster they said they recommended the AX343-F 43 Element with F connector cause it is for digital DTT. 
Called around coupe dicksmith any they dont have the one Cyril mentioned in stock.  But they do have the 43 Element AX343 not the AX343-F so they have one without the F connector. 
Woudn't they both be the same and have the same balun?  Just one is easier as it is F connector.?




My opinions and ideas expressed in posts are solely my own and do not reflect the views of my employer in any way..


Create new topic

Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

N4L helping TAKA Trust bridge the digital divide for Lower Hutt students
Posted 18-Jun-2018 13:08


Winners Announced for 2018 CIO Awards
Posted 18-Jun-2018 13:03


Logitech Rally sets new standard for USB-connected video conference cameras
Posted 18-Jun-2018 09:27


Russell Stanners steps down as Vodafone NZ CEO
Posted 12-Jun-2018 09:13


Intergen recognised as 2018 Microsoft Country Partner of the Year for New Zealand
Posted 12-Jun-2018 08:00


Finalists Announced For Microsoft NZ Partner Awards
Posted 6-Jun-2018 15:12


Vocus Group and Vodafone announce joint venture to accelerate fibre innovation
Posted 5-Jun-2018 10:52


Kogan.com to launch Kogan Mobile in New Zealand
Posted 4-Jun-2018 14:34


Enable doubles fibre broadband speeds for its most popular wholesale service in Christchurch
Posted 2-Jun-2018 20:07


All or Nothing: New Zealand All Blacks arrives on Amazon Prime Video
Posted 2-Jun-2018 16:21


Innovation Grant, High Tech Awards and new USA office for Kiwi tech company SwipedOn
Posted 1-Jun-2018 20:54


Commerce Commission warns Apple for misleading consumers about their rights
Posted 30-May-2018 13:15


IBM leads Call for Code to use cloud, data, AI, blockchain for natural disaster relief
Posted 25-May-2018 14:12


New FUJIFILM X-T100 aims to do better job than smartphones
Posted 24-May-2018 20:17


Stuff takes 100% ownership of Stuff Fibre
Posted 24-May-2018 19:41



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.