Triax 64&Dark motor

mike1

mike1

Non-28.2° Sat Specialist
My Satellite Setup
Triax 64cm triax ( Darkmotor ) Inverto Black Ultra.
T55 - 28E/19E/13E/1.9E

Mutant AX 51 Open PLi
GT Media V7SX
My Location
UK
My setup
64 triax
Darkmotor
Inverto lnb

& vu solo2 :)
 

Attachments

  • received_748886888636820.webp
    received_748886888636820.webp
    107.3 KB · Views: 71
  • received_667689090089934.webp
    received_667689090089934.webp
    144 KB · Views: 68
Sats
Beats boring 28east!
 

Attachments

  • IMG_20170516_215205642~2.webp
    IMG_20170516_215205642~2.webp
    447.5 KB · Views: 66
Last edited:
Vu+ with nc+ and mooz card.
 

Attachments

  • received_748886665303509.webp
    received_748886665303509.webp
    61.1 KB · Views: 61
mike1 said:
Sats
Beats boring 28east!
Click to expand...
Just curious - is this in addition to the 88cm in your "setup" description?
I would dare speculate you might get even more on the 88cm. The 64 is really only a 60cm (absolute width).
And Triax even allows wasting part of the dish for nothing, as the effective area of the dish sits above the arm extending from the face.
So I would guess the TD64 is really 55-56cm dish.
Don't get me wrong; I have two myself - they do the job, and has worked fine for many years.

But if you stuck an 88cm on the motor, more stuff might beam in... (not sure if the "extra" would fall in the category of "watchable" for you, but for us hobbyistst, it's the catching, not the watching that counts...)
 
Oops i havnt updated that!
I have a triax 80 cm in the garage. Might set it up for stuff like 4w.
I wanted to go down to 64cm as it never gets blown out of alignment in the wind.
 
mike1 said:
Oops i havnt updated that!
I wanted to go down to 64cm as it never gets blown out of alignment in the wind.
Click to expand...
Fair point.

However, if you are into sat-catching, the then other plus (apart from more signal) of a larger dish is the smaller beam-width, which allow you to distinguish better bewteen close satellites.
I mean, with my 40cm Gibertini, I just hand-point slightly upelevation-wise, and generally a little east of south on azimuth, and I get reception on the main German channels.
The larger the dish, the better separation you get - more channels to catch...
 
st1 said:
And Triax even allows wasting part of the dish for nothing, as the effective area of the dish sits above the arm extending from the face.
Click to expand...

I've thought about that in the past, too.
I would think that ~apart from the fact that the signal cannot get through the arm itself, so the little square of dish surface beneath it is in fact useless indeed~ the rest of the lower 'rim' of the dish would just as much reflect the satellite signal to the focal point of the dish, as any other part of the dish. So I would think that that part can also be used as effective dish area.

@Trust1 showed some time ago that the LNB aiming point of the standard LNB holder of a triax 64 would be at the G-spot of only the effective area ABOVE the arm (see
).
But that design choice doesn't mean the rim below that area (apart from under the arm itself) cannot be used as effective area.

I'm not sure what the f/D of the dish is supposed to be (with and without the lower rim), though. But with an LNB with matching f/D-ratio, and with aiming the LNB a little bit lower, the total dish surface can be used as effective area I would think.
Maybe that area IS already used in practice, even; as from what I've read the exact aiming point of an LNB isn't that quintessential.
I've never read about tests where people had wet cloths on the lower rim, to test the difference, alas. :-(

Greetz,
A33

Edit: Ah! The youtube link shows as a movie, not as a link! The wonders of internet technology....
 
Nice video!!
 
Back
Top