Results 1 to 6 of 46
10-25-2012 12:38 AM #1
just got 30w tonight will post pics tommarow got 30% quality with my slimline dish with dishnetwork super dish lnb.
10-25-2012 12:38 AM # ADSRegister Today & This Ad Goes Away! Syndicated Advertisement
- Join Date
- Advertising world
10-25-2012 08:26 PM #2
10-25-2012 09:13 PM #3FTA Bumpkin
Good job on getting 30W, that one can be a challenge.
I'm guessing that LNBF is looking for a "round" (offset oval) dish, so it probably isn't being illuminated by all of your Slimline.
That is probably the same situation I had on one of my 30W experiments, a LNBF that was not being fully illuminated by a Slimline (elliptical) dish.
Don't know if it would help you any, or if you want to mess with it, but you might try setting your LNBF to zero degrees skew, and skewing your whole dish instead. Here is a thread with some pics of how I did it, might give you some ideas.
http://www.satelliteguys.us/threads/...e-fixed-on-30WC-Band: 12' Unimesh/AJAK 180/GeoSat C2***10' "Perfect 10" mesh/GeoSat C2*** 8.5' Birdview solid/BV H-H/GeoSat C2*** 7.5' Unimesh/CalAmp voltage-controlled LNBF***...C-Band LOS from 58W-139W
Ku-Band: 3ABN .9m/SL1PLL LNBF/SG2100***Fortec .9m/TrackerII LNBF/STAB HH90***7.25' Birdview "Spoon"/TrackerII/70:1 BV H-H***Prodelin 1.8m/GeoSat Bullet/AJAK 180 H-H***Paraclipse Hydro 1.5m Prime Focus/Linear Actuator/C120 LNBF...Ku-Band LOS from 30W-129W
Receivers: Toshiba TRX-1820 Analog-->AZBox Elite/Openbox S9 HDx2***GeosatPro microHD
OTA Digital: CM 4228/CM 7777 Preamp/Apex DT-250 for OTA Locals, Toshiba 46" Regza & Toshiba 19" LCDs
In Progress: (2) Birdview 8.5' (1 solid & 1 perf) w/Birdview H-H mounts, "Drake" 10' solid alum....*BVOC Asst. Cook & Bottlewasher*
10-25-2012 11:33 PM #4
I had to use what I had to work with. i'll check that out the post you made about you getting 30w.
10-26-2012 12:34 AM #5
elliptical this 'n that
Elliptical dishes should always be skewed.
An elliptical feedhorn will illuminate the entire dish surface.
An elliptical dish with matching feedhorn will have the beamwidth of a round dish of the same width.
Signal level may be a bit lower, but adjacent bird interference will be reduced, raising sig Quality.
A round feed gets signal from entire dish width, but nothing beyond top & bottom dish edges.
This raises the noise level, lowering performance (which may be fine on strong signals).
Regardless of all the above, feedhorn efficiency plays a role.
example of good: Primestar 84e
example of poor: SuperDish 121
Medeocre band stacked FSS LNBs can be much improved with a better feedhorn.
eg: discussion by Pendragon
See this thread by Tech#344, also recommendation for better lot numbers of LNBs
There are other good "how I made my own Feedhorns" stories on the forum.
Do we need an elliptical dish FAQ?
Secondary LNBFs mounted off to the side of the central LNBF play by different rules, which distract from the simplicity of this discussion.
laboriously typed on my iPhone 4.
10-26-2012 12:45 AM #6Addicted beyond recovery
Your Location Satellite Data Dish Setup Data Latitude: 42.1656°
Longitude: -88.2942°Name: 30W HISPASAT 1C | HISPASAT 1D | HISPASAT 1E | SPAINSATDistance: 40112km
Azimuth (true): 112.5°
Azimuth (magn.): 115.8°
LNB Skew [?]: -43.2°
Sat locations I can use, Sat names mean nothing to me!
Ku setup: Winegard 3100, Invacom QPH-031, DG-380 (jury is still out on this setup - tighter beam patterns giving me alignment fits)
C-Band setup: No dish up currently, Chapparal ortho w/ 8115's, Vbox-X
Receivers: Sonicview 8000HD, Viewsat 2000 Ultra, Prof 7301, Digitrans DVB/DCII DTE-7150, DSR-922, Skybox F3, Geosat Pro MicroHD
Hardware in storage: Winegard 2076, SG-2100, SL2 bullet LNBF, 10' KTI buttonhook, Prodelin 1.8m Ku fixed, numerous DirecTV and Dish reflectors