Hello,
I must comment on the general electrical and mechanicial construction of the ELAD mast head amplifier and bias tree was poor.
The first unit received from W&S was faulty which was returned and replaced.
The second unit worked for about two weeks then failed.
I returned this back to
[email protected] for a full refund.
The system has now been replaced with the Kuhne LNA 1090MHZ mast head amplifier and bias tree.
This system has a better noise figure then the Elad and additional band pass filtering on the pre-amplifier antenna input, so out of band signals (1090mhz) will not be amplified and reduce amplifier performance.
Kuhne also added some additional static protection on the amplifier RF stages and advised an antenna with DC ground would be the preferred option.
far better mechanical construction for outside applications.
I have posted polar diagram showing my coverage using the SSJ 1090MHZ antenna system.
Hope you find these comments helpful.
Kind Regards
Paul
MW0CVW
EGGP/EGNR