70 cms antennas for DATV

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70 cms antennas for DATV

Postby G4GUO » Mon Jul 26, 2010 8:24 am

Hello all,

I am not far off being QRV on 70 cms DATV.
All I am missing is a suitable antenna ( I don't
think a duaband colinear really counts ).

I am after something unobtrusive that
can withstand coastal winds and is
relatively wideband.

Anyone have any suggestions ?

- Charles G4GUO
G4GUO
 
Posts: 30
Joined: Tue Feb 16, 2010 12:51 pm

Re: 70 cms antennas for DATV

Postby F3YX » Tue Jul 27, 2010 11:04 am

Good afternoon, please remind that ATV / DATV is using Horizontal polarisation antennas for Dx (except sometimes for local transmissions in moutain area)
Personally, I am using 4 x 21 elts. Tonna antennas on 70 Cm. Center frquency is 436,5 MHZ covering from 433 to 440 MHZ.
Best 73
F3YX
 
Posts: 4
Joined: Tue Jul 27, 2010 10:58 am

Re: 70 cms antennas for DATV

Postby G4GUO » Tue Jul 27, 2010 11:42 am

Not related to antennas but related to 70 cms.
I have posted a short video on my blog
http://www.g4guo.blogspot.com/
of my DATV system. Judging by the amount
of work involved it will probably be the last video
I do. I think I will stick to still pictures in future !

- Charles
G4GUO
 
Posts: 30
Joined: Tue Feb 16, 2010 12:51 pm

Re: 70 cms antennas for DATV

Postby G4GUO » Wed Jul 28, 2010 9:38 pm

I couldn't find anything just right for what I wanted
so in the end I decided to buy a load of antenna
hardware from sandpiper Aerials and make my own.
That way I can make it as rugged as I like and as many
elements as I like and tuned for the part of the band
I want. I found a suitable design in the ARRL Antenna
Handbook that I can modify.

- Charles
G4GUO
 
Posts: 30
Joined: Tue Feb 16, 2010 12:51 pm

Re: 70 cms antennas for DATV

Postby Andy G8SIK » Thu Jul 29, 2010 10:09 am

Hi Charles,

just read your latest Blog and Tweet. Well done, that must be a first. (re:- Txing HDTV using DVB-T1 on 24cms)

73 de Andy, G8SIK.
Andy G8SIK
 
Posts: 3
Joined: Sun Mar 02, 2008 4:38 pm
Location: Kingston upon Thames

Re: 70 cms antennas for DATV

Postby G4GUO » Thu Jul 29, 2010 10:22 am

Hi Andy,

I think all I have managed to do is to show that
the bitstream from a Hauppauge HD-PVR is
compatible with a regular HD ready TV that
has a DVB-T tuner. It was fun to do anyway.

I notice in the paper today that you can now
buy a 3D camcorder (Panasonic HDC-SDT750).
I don't think I will be trying that anytime soon.

- Charles
G4GUO
 
Posts: 30
Joined: Tue Feb 16, 2010 12:51 pm

Re: 70 cms antennas for DATV

Postby M0DTS » Thu Jul 29, 2010 10:34 pm

Hi Charles..

If you put a subscription 3D channel on before sky does in the near future then it maybe worthwhile at £50+ a month per subscriber...hi

Good work!

73

Rob
M0DTS
 
Posts: 65
Joined: Sun Feb 24, 2008 9:03 pm
Location: Yarm


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