I am planning a similar installation, using Deeco mast sections (6' x 
10"). I have 20 of these, used of course. I don't think they have been 
manufactured for decades. Sections interface with pin and socket, with 3 
x 1/2" bolts between plates on each end.
 Will also be strapping across the joints, as I know what a PITA 
intermittent connections are.
 It will be a radiating mast with no other antennas on top, apart from a 
parallel wire for 80 m operation.
 Erection won't commence until at least later in Spring, as the ground is 
just so wet now, after one of the wettest years we've had.
73, Luke VK3HJ
On 19/08/2020 4:06 am, Ron WV4P wrote:
 
Howdy All,
I'm getting ready to put up a Rohn 25 Insulated Base ~1/4 wave vertical.
(115') and I'd like to get some advice if possible.
 
 
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