Anyone tried to make BIG dish at home?

L

Low Profile

Regular Member
Messages
364
My Satellite Setup
DM800HD, DM7000 80GB HD with Asus WL330 wifi + 2GB usb drive, Skystar2.3, 2.2m Kinhuge Dish with Inverto LNB and Invacom ADF-120 feedhorn. Pace 1.3.25 and 80cm for Sky.
My Location
Lot, Dordogne, Correze border.
It reminds me of an idea I had for an LNB many moons ago.

Chances are I'll never get around to build it, so perhaps it might interest someone.

LNB Idea.jpg
 
mouse3

mouse3

Regular Member
Messages
154
My Satellite Setup
1.2 offset,1.2 simetric ,0.9 offset.
My Location
Transilvania
JanH said:
What is f/D parameter of yours big dishes?
I think it is very important for feedhorn design.
JH
My locations it s on town,i can t install here large dishes,UE fx$%&g legislation against large dishes...i must relocate first...with large backyard available...
 
Trust

Trust

Specialist Contributor
Messages
947
My Satellite Setup
1.8 m CM at SMR 1224 + Elev. with 7 lnb changer Ku (lin - circ) - Ka (lin - circ) C (lin - circ)
My Location
Nijmegen Netherlands
RimaNTSS said:
I am also looking for Rotary Actuator. Who has an idea where to get one like on picture or similar?
Right now there is one for sale at "marktplaats" here in the netherlands
 
RimaNTSS

RimaNTSS

Super Moderator
Staff member
Messages
5,042
My Satellite Setup
Some SAT-related hardware.
My Location
N-E from Riga
Thanks Trust!
I am in process of registering at _Fibo-Owners.com to find out more about similar gadgets _http://www.fibo-box.com/polarizer.html
 
J

JanH

Regular Member
Messages
80
My Satellite Setup
Dreambox 800
My Location
Czech rep.
Low Profile said:
It reminds me of an idea I had for an LNB many moons ago.

Chances are I'll never get around to build it, so perhaps it might interest someone.

View attachment 40236
Can you write down something more about "Idea" benefits?
Thanks
JH
 
L

Low Profile

Regular Member
Messages
364
My Satellite Setup
DM800HD, DM7000 80GB HD with Asus WL330 wifi + 2GB usb drive, Skystar2.3, 2.2m Kinhuge Dish with Inverto LNB and Invacom ADF-120 feedhorn. Pace 1.3.25 and 80cm for Sky.
My Location
Lot, Dordogne, Correze border.
The rear element is λ/2 from the rear plate, so any reflected waves from the rear plate are in phase (effectively increasing the signal), the front element is λ/2 from the rear element so you have maximum deflection between the two elements (hence the diff amp). The 'beauty' of this is it is tuned to in-band signals (although some harmonics would also be amplified) so S/N should be significantly increased. The mechanical positioning of the elements (dependent upon frequency) gives this advantage.
 
J

JanH

Regular Member
Messages
80
My Satellite Setup
Dreambox 800
My Location
Czech rep.
I have no idea how to make differencial amp on microwave. Board design is not so easy. Looks possible to use other polarisation input as input for front element but ....

Enclosed are pictures of LNB boards.
 

Attachments

J

JanH

Regular Member
Messages
80
My Satellite Setup
Dreambox 800
My Location
Czech rep.
mouse3 said:
My locations it s on town,i can t install here large dishes,UE fx$%&g legislation against large dishes...i must relocate first...with large backyard available...
You stoped your experiments or have you something new?
JH
 
mouse3

mouse3

Regular Member
Messages
154
My Satellite Setup
1.2 offset,1.2 simetric ,0.9 offset.
My Location
Transilvania
Nothing new,after job i m working on it.
 
J

JanH

Regular Member
Messages
80
My Satellite Setup
Dreambox 800
My Location
Czech rep.
mouse3 said:
Nothing new,after job i m working on it.
BBC and english Freesat changed satelite. Here in Prague is full signal on small dish now instead nothing on 150 dish.
Try reception, it should be much more better. I do not know actual footprint but looks fine.
JH
 
mouse3

mouse3

Regular Member
Messages
154
My Satellite Setup
1.2 offset,1.2 simetric ,0.9 offset.
My Location
Transilvania
WOW,deserve one test...maybee it s samthing temporary,usualy wonders takes only 3 days.
Are You talking about fta BBC ?
 
J

JanH

Regular Member
Messages
80
My Satellite Setup
Dreambox 800
My Location
Czech rep.
Yes, free BBC and Freesat which means ITV and more. It is about satelite footprint not about crypting. It is free for long time.
I saw BBC HD etc yesterday on 80 dish. I will check it this weekend, I must setup dish for it on roof.
JH
 
mouse3

mouse3

Regular Member
Messages
154
My Satellite Setup
1.2 offset,1.2 simetric ,0.9 offset.
My Location
Transilvania
Are You talking about Astra 1N ?....my country DX-ers report two days ago bad news about reception.Signal decrease on the West side by 0,5dB.In the central area 2,2m spun it s not enough for pixelation only few hours/day...
 
J

JanH

Regular Member
Messages
80
My Satellite Setup
Dreambox 800
My Location
Czech rep.
I am confused too, but I personally saw receiver channel search and live pictures from BBC HD and ITV etc.... My friend did not get anythink on your dish too. Maybe it is at new transponders, frequences. I will go back to man with miracle receiver but it take a time.
I definately will try to resolve the mystery :-)
JH
 
mouse3

mouse3

Regular Member
Messages
154
My Satellite Setup
1.2 offset,1.2 simetric ,0.9 offset.
My Location
Transilvania
Make the test fast...nothing here.
 
J

JanH

Regular Member
Messages
80
My Satellite Setup
Dreambox 800
My Location
Czech rep.
IMAG0308.jpg

BBC picture :-)
 
I

italy2006

Regular Member
Messages
84
My Satellite Setup
starsat
My Location
iran
my question is how to make metal framwork for 180 cm.how to curve them.
 

Attachments

Lexzie

Lexzie

Member
Messages
188
My Satellite Setup
Xtrend ET10000 DVB-C, S2, T and IPTV, VU+ Zero 4k, Xtrend ET9500
80 cm fixed dish (28.2E/23.5E/19.2E/13E)
120cm Channel Master offset dish with polarmount (42E-34.5W)
My Location
The Netherlands
I once found this partial description on building a DIY dish, the source webpage does not exist anymore.
 

Attachments

I

italy2006

Regular Member
Messages
84
My Satellite Setup
starsat
My Location
iran
is there anyone to answer my question?
 
Lazarus

Lazarus

Tout Rond Bon Oeuf
Staff member
Messages
26,074
My Satellite Setup
80cm Motorised.
Several small Dishes.
Much else.
My Location
North York Moors
Most of our Members only log in occasionally, so you might have to wait a while before receiving a specific reply.
 
Top