Re: Sirio 827 I also bought a drive-on mount from the same bloke last year, and can confirm Big Mart is a very good fabricator, and a very friendly and genuine bloke as well.
The one I got was his most 'heavy duty' mount, and was extremely sturdy.
Re: Sirio 827 I've just ordered Big Marts elevated mast tilt bracket to put my 827 up on. Intending to fit three 20ft ally scaffold poles together with 3 guy points.
I will post pics of the project if anyone's interested.
Raising and lowering should prove tricky. Ideas guys?
One idea I have (but I think 3 x 20ft tubes will be too much in terms of flex)is to have a horizontal tube welded on to the tube base at 90 degrees in front. This will allow a smaller tube to be inserted into this (bolted in like the main mast), that will project parallel with the ground when the mast is vertical, and , pivot to vertical allowing the mast to be tilted back parallel to the ground,(think of a right angled set square with the 30/60/90 degree corners, with the 90deg corner being the pivot)
Considerations on this method is that a suitable quality rope or wire harness is essential between the top of the mast and the parallel pole (forms the triangle)to which underneath a pulley system (large purchase ratio)is added.
Raise and lowering: mast horizontal with antenna attached, pole in vertical position, pulley blocks at other end sufficiently forward of mast base to allow purchase.
Purchase in / out pulls vertical pole over towards ground / vertical thereby raising / lowering mast. An A frame arrangement can be used in lieu of a single pole, more complicated to setup and arrange but would allow longer pole to be pivoted. I don't think it would cope with 3x20ft sections though..
Maybe this will give you an idea to work from? Hope it helps anyway. Don't blame me though if it falls down, i'm no engineer!
Last edited by pathfinder12830, 15/Nov/2013, 9:37 pm
Re: Sirio 827 Both these portable set ups are impressive and show dedication. In the case of the 827, I would imagine it takes a while to set that antenna up with all the radials. Looks the business though and no-doubt works the dx too.
I'm keen to know how much benefit there is running with this portable arrangement over say a quality sirio mobile antenna that is say mag mounted, same rig & amp.
Last edited by pathfinder12830, 15/Nov/2013, 9:38 pm