2.4 DH Antenna installation

moonbase · Mar 19, 2017

blademedia said:
Thanks D, yes that would be useful, no rush its one of my projects for a rainy day.

Here you go, pictures of the ADL flat scalar, for prime focus antenna with F/D of 0.36
The depth of the scalar rings on the dish facing side is 29mm and the internal diameter of the central feed/LNB clamp hole is 71mm

Hope the pics help?

John · Mar 19, 2017

moonbase said:
Here you go, pictures of the ADL flat scalar
The depth of the scalar rings on the dish facing side is 29mm

Hope the pics help?

Another one, ADL deep single choke scalar as per previous pics
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moonbase · Mar 19, 2017

John said:
Another one, ADL deep single choke scalar as per previous pics
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That's a deep one John, would you know the reason why they supply different depths? My technical knowledge of dimensions and frequencies, F/D's regarding etc is very poor.

Rgds

John · Mar 19, 2017

moonbase said:
That's a deep one John, would you know the reason why they supply different depths? My technical knowledge of dimensions and frequencies, F/D's regarding etc is very poor.

Rgds

Not 100% sure MB, it could be a F/D thing ??, the scalar was originally fitted with a Ku port as well but the wave guide was in a fixed position on the scalar and not adjustable. I butchered it years ago to try something ... i think it was to retro-fit a modern Universal Ku lnbf instead of the servo type originally fitted.

blademedia · Mar 19, 2017

moonbase said:
Here you go, pictures of the ADL flat scalar, for prime focus antenna with F/D of 0.36
The depth of the scalar rings on the dish facing side is 29mm and the internal diameter of the central feed/LNB clamp hole is 71mm

Hope the pics help?

John said:
Another one, ADL deep single choke scalar as per previous pics
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Thanks Guys, that very useful, will post up when work starts and comparison tests.

blademedia · Mar 19, 2017

moonbase said:
That's a deep one John, would you know the reason why they supply different depths? My technical knowledge of dimensions and frequencies, F/D's regarding etc is very poor.

Rgds

Have a read here D,

Code:

http://www.satelliteguys.us/xen/threads/how-do-scalar-rings-work.227093/

Care and Feeding of a SETI Dish

blademedia · Mar 19, 2017

moonbase said:
Hope the pics help?

Yes especially the hub cap :-lol

, here's a picture of my car hub cap

John · Mar 19, 2017

blademedia said:
Have a read here D,

Code:

http://www.satelliteguys.us/xen/threads/how-do-scalar-rings-work.227093/

Care and Feeding of a SETI Dish

That's a good link, interesting reading .... i knew i'd seen that style of scalar before, i'll carry on refurbing the one i have to do a bit of comparing.
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blademedia · Mar 19, 2017

John said:
Another one, ADL deep single choke scalar as per previous pics

Work in progress

John · Mar 19, 2017

blademedia said:
Work in progress

View attachment 105044 View attachment 105045 View attachment 105046

... is that mine or yours ??

Iv'e had an hour or so refurbing my old butchered one as well.

blademedia · Mar 19, 2017

John said:
... is that mine or yours ??

Iv'e had an hour or so refurbing my old butchered one as well.

its mine

ive had a hour making one :-lol

blademedia · Mar 20, 2017

blademedia said:
Work in progress

View attachment 105044 View attachment 105045 View attachment 105046

Just posting these brazing rods up, might be useful for anyone wanting to join aluminium, you can use them with a plumbers type torch, they have a low melting point plenty of videos online on what to do

blademedia · Mar 22, 2017

blademedia said:
You don't want to buy one J, there about $150 DH antenna sell them, scroll down this instruction manual

60″ H to H Powered | DH Satellite

Get this, drill a hole same size as needed 2x2 wood would be best it will fit down lnb throat better for keeping it straight, then drill the middle hole to same size as laser pen job done.
View attachment 104582
View attachment 104583

2.4 DH Antenna installation

@moonbase

Hi D,

I didn't have a correct size hole cutter so had to use tape, buy the correct size hole cutter for then LNB, drill it out then drill the middle hole to same size as laser pointer,

Don't buy a long laser pointer you want a small one, long ones will hit the back of the LNB, put screws in it so it can be easily removed when inserted, when using the laser wrap tape round the switch to keep it in the on position,

When inserted make sure the wood is flush all way round with the rim of the LNB.

blademedia · Mar 22, 2017

blademedia said:
long laser pointer you want a small one

I use this one from Maplin's, obviously cheaper on ebay
Keychain Laser Pointer | Maplin

moonbase · Mar 22, 2017

blademedia said:
I use this one from Maplin's, obviously cheaper on ebay
Keychain Laser Pointer | Maplin

Thank you for the pictures and links.

Rgds

blademedia · Mar 23, 2017

blademedia said:
Just posting these brazing rods up, might be useful for anyone wanting to join aluminium, you can use them with a plumbers type torch, they have a low melting point plenty of videos online on what to do
View attachment 105068 View attachment 105069

Quick test jointing a ring, impressed with the rods, a quick rub down and this is the end result

blademedia · Mar 23, 2017

@moonbase

Ive finished the holder, its only a quick knock up so don't expect perfection

, but it will work as it should

, ive put you the extra holes in, you wont need them unless you want to install multi feed, its a solid setup with one hole

, Pm me your address and ill get it in the post as soon as I can

,

Please post a few pictures up when you have it installed with LNB,

moonbase · Mar 23, 2017

@blademedia,

Many thanks, it looks good for the job

Rgds

blademedia · Mar 28, 2017

Just bagged this for testing, never used, correct F/D for my dish

s-band · Mar 28, 2017

Decent price. I think the ID is a bit larger than the Tit but the dielectric plate might be ok with a bit of packing. Getting one of these? Just Sharing This - USB Servo Interface for Polariser etc

The listing has the wrong picture but Feedsat's friend seems to sell them for 72Euro POLAROTOR PRIE ADJ Pour bande C et Prime Focus Still a decent price.

2.4 DH Antenna installation

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