4x7elements / 6m
The hardware of 4x7el. / 6m is fully ready to run !!!
Unfortunately I must wait for the time when local TV broadcast TX will be switched off. Any sked for my first incidental EME qso is invited starting in November 2009.
Heavy duty free standing tower 27m of heigt ( altogether )
Calcutated for 3 sqm/180km-h withstand + reserves
The hoist with AZ rotator PST71
An electric winch through double pulley cca 800kp of one strengh
I add there on the winch another brake ( unless typical electromagentic brake on a winch el. motor ). This additional brake is made as mechanical one - disc type brake.
I do hope this could make the lift more secure.
Welding of the supporting structure for 4x7el. Yagi with full elevation
An " H " is upward. The one is fully functionall, AZ 0-360deg. plus EL 0-90deg. plus/minus
I considered all kinds of problems which could bring construction of a 4x xel. antennas system for 6m band and because of being a newcomer on this band and EME, I decided to start with a system 4x7el. Yagi only.
I have built for this system a tower 27m of height with a trailer powered by the electric wind up.
The tower is free standing and the trailer should carry out a total weight of 800kg of loads.
Based on my calculation a complete construction weight could be about 358kg from which:
trailer with AZ rotator PST71 cca 102kg
the " H " construction + EL. cca 220kg fully elevated
the 4x 7el. Yagi cca 36kg
7el. Yagi has YU7EF design manufactured for me by Jirka OK5IM
