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.




1924 posts

Uber Geek
+1 received by user: 563


Topic # 89615 6-Sep-2011 10:30 Send private message

I installed Freeview Terrestrial in the weekend, with partial success only.  Specifically I have TVNZ and TV3 et al Channels good, and the Prime/Maori/Trackside group are dectable but not viewable.  I understand from searching the forum this means I am not picking up the Kordia MUX.

I am in Nelson, in "very likely" coverage area, with clear line of sight to the Mt Campbell transmitter which is 40km away and 1300m higher than our house.

I removed the old VHF and installed a new antenna - I am too new to post a link but its a Dick Smith L4735.

I used an F-crimp fitting and using sheildked RG-6 I have run the feed directly to a wall plate which has a saddle and clamp style termination, then via a 1.5M PAL lead to the TV, which is a Freeview Ready Sony Bravia.

I have spent a lot of time experimenting with aerial direction and I am confident its correct. 

Any help appreciated, but the two main things puzzling me at the moment are: -

1) Is 40km too far for an unamplified signal?
2) The elements on my aerial are X-shaped, but they are vertically compresed so they look kind of like and x wing fighterand I am unsure if this makes them vertical or horizontal polarity. 
(My neighbours all have rod style vertical elements and according to wikipedia Mt Campbell is vertical polarity).




Mike

Create new topic
6039 posts

Uber Geek
+1 received by user: 392

Trusted

  Reply # 517369 6-Sep-2011 10:42 Send private message

Are you sure you haven't got the inner core touching the outer braid/shielding anywhere?

Personally I much prefer to bring the aerial all the way to the TV and forget the wall plates, especially if it's not a F crimp version etiher. Is your new RG6 cabling 'Sky rated'?

Have you tried the other polarity as a test?

1794 posts

Uber Geek
+1 received by user: 91


  Reply # 517431 6-Sep-2011 12:12 Send private message

MikeAqua:
2) The elements on my aerial are X-shaped, but they are vertically compresed so they look kind of like and x wing fighterand I am unsure if this makes them vertical or horizontal polarity. 
(My neighbours all have rod style vertical elements and according to wikipedia Mt Campbell is vertical polarity).


From your description it sounds like you have mounted your aerial horizontal instead of vertical.
Should look like an x wing on its side and not in level flight.
The reflectors should look like an open book standing vertically.



1924 posts

Uber Geek
+1 received by user: 563


  Reply # 517525 6-Sep-2011 14:14 Send private message

Thanks for the helpful posts.

I'll try the polarity first.   Clearly I have it wrong, its a 5 minute job, and based on reading the threads on this forum it will make a significant difference to how much signal the antenna picks up.

I can bypass the wall plate and go straight into the TV, so I'll do that too, just having trouble tracking down a crimpable plug that will work with the push in PAL socket on the back of my TV.

The cable is sky approved RG6, purchased from a sky installer and I'm confident in my crimp at the aerial end, as I was very careful to lay back all the outer wires and its a snug crimp.







Mike

1794 posts

Uber Geek
+1 received by user: 91


  Reply # 517534 6-Sep-2011 14:33 Send private message

MikeAqua: Thanks for the helpful posts.


I can bypass the wall plate and go straight into the TV, so I'll do that too, just having trouble tracking down a crimpable plug that will work with the push in PAL socket on the back of my TV.




I use screw on f connectors and an f socket to Pal plug adaptor. $4.90 at Jaycar. Works fine.

1794 posts

Uber Geek
+1 received by user: 91


  Reply # 517535 6-Sep-2011 14:35 Send private message

B1GGLZ:
I use screw on f connectors and an f socket to Pal plug adaptor. $4.90 at Jaycar. Works fine.


They're also available at Mitre 10 and Bunnings.

6039 posts

Uber Geek
+1 received by user: 392

Trusted

  Reply # 517553 6-Sep-2011 15:07 Send private message

MikeAqua: Thanks for the helpful posts.

I'll try the polarity first.   Clearly I have it wrong, its a 5 minute job


Definitely the first point of call.  



1924 posts

Uber Geek
+1 received by user: 563


  Reply # 517715 6-Sep-2011 19:37 Send private message

Thanks heaps guys, rotating the antenna did the trick.




Mike

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 »

True Key by Intel Security adopts Windows Hello
Posted 7-Dec-2016 20:36


Spark moves to 200Gbps wavelength milestone
Posted 7-Dec-2016 16:00


Xero adds Apple Pay
Posted 7-Dec-2016 11:28


Review new Apple MacBook Pro 2016 (13-inch)
Posted 6-Dec-2016 10:08


50Mbps the new fibre normal
Posted 6-Dec-2016 07:02


Microsoft and Netsafe issue fresh warning about scammers
Posted 5-Dec-2016 19:21



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.