2.4 DH Antenna installation

[blademedia]

diameter of my Invacom ADF with a vernier caliper and it is 25.0mm

Your caliper is accurate moonbase , no real need for a split holder with the end of the scaler screwing of, ive gone for a steel one, will weld this lot up and connect it to the aluminium holder with threaded rod, this will allow movement in every direction.

 

[John]

Your caliper is accurate moonbase , no real need for a split holder with the end of the scaler screwing of, ive gone for a steel one, will weld this lot up and connect it to the aluminium holder with threaded rod, this will allow movement in every direction.
View attachment 104427 View attachment 104428

Nice one ...
Not very nice weather for outdoors fabrication matey is it, filthy wet and cold up here.

 

[blademedia]

Nice one ...
Not very nice weather for outdoors fabrication matey is it, filthy wet and cold up here.

Wet and miserable here John, I have a workshop to work in so its not too bad for jobs like this

 

[blademedia]

I best go and buy a compass, cant find a tin the correct size , need to make it slightly larger than this to bolt the feedhorn too it

 

[blademedia]

Both working on same project @John , Proto type no 2, no 1 will be ok for the precision feed, will cut them out tomorrow

 

[John]

Both working on same project @John , Proto type no 2, no 1 will be ok for the precision feed, will cut them out tomorrow
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I know chap .... i was going to say the same to you lol

 

[moonbase]

Your caliper is accurate moonbase...

It's a Mitutoyo caliper with old style clock face, I got a couple of them second hand, they seem accurate enough for my bodge jobs.

Rgds

 

[blademedia]

It's a Mitutoyo caliper with old style clock face, I got a couple of them second hand, they seem accurate enough for my bodge jobs.

Rgds

Its spot on . I use the older type, I have digital one that's usefully a bit out

 

[blademedia]

The scalar ring turns too easy so put some ptfe on it, also two of the screw holes are very slightly out to accept this lnb, will run same size drill at a slight angle through holes

 

[Lazarus]

It appears to be Summer at your QTH ..... ;)


Either that, or your camera is predictive!

 

[blademedia]

It appears to be Summer at your QTH ..... ;)


Either that, or your camera is predictive!

It will be ok in 23 days

 

[blademedia]

Both working on same project @John , Proto type no 2, no 1 will be ok for the precision feed, will cut them out tomorrow
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Not happy with this design John lots better how you are doing it, decided to buy a ring roller ,


My intension is to make them like this below, yellow will be threaded rod, adjustment will be on this, up/down/left right,

 

[blademedia]

Picked some aluminium up for new arms and lnb holder rings, started tapping the dish arms, need to bend them next and cut them to length.

 

[moonbase]

Picked some aluminium up for new arms and lnb holder rings, started tapping the dish arms, need to bend them next and cut them to length.

Thats a real old vice you have there got there with the quick release handle. The old tools are the best, a lot better than the modern Chinese stuff made from moderate grade steel.

 

[blademedia]

Thats a real old vice you have there got there with the quick release handle. The old tools are the best, a lot better than the modern Chinese stuff made from moderate grade steel.

You can't beat a good old one , I have another that's not quick realise good old vice they are will still be working when we are long gone, I need to fix this one back down I had a swap round in workshop, but nice to be working outside today bending feed arms so dragged it onto decking

 

[blademedia]

Perfect, a few more ends to tap

 

[archive10]

Will cut this one out later today
View attachment 104424

Quick, perhaps uninformed question:

Is it on purpose that the feedarm attachment points are not spaced equally around the ring-shaped part of the holder?
The angular distance seems to be 100, 130, 130, or so...

 

[blademedia]

Quick, perhaps uninformed question:

Is it on purpose that the feedarm attachment points are not spaced equally around the ring-shaped part of the holder?
The angular distance seems to be 100, 130, 130, or so...

The one your quoting me on was guess work/my maths calculations and was slightly out, this ones correct
2.4 DH Antenna installation

 

[blademedia]

Arms finished

 

[archive10]

The one your quoting me on was guess work/my maths calculations and was slightly out, this ones correct
2.4 DH Antenna installation

I see. It must be a slight optical illusion created by the extension side not being aligned with the center.
I'm sure you're right, but the two bottom ones looks slightly off-angle