stop messing around with all that other stuff and get the wireless side sorted out first and think things through logically.
As I said in post http://forum.mikrotik.com/viewtopic.php ... 11#p296211
You don't need a great deal of maths or experience to figure out that you have a "radio related" error.
You have 14km, from the standard free space loss equation, you can expect -100db at 1st km on 2.4Ghz.
double the distance and subtract 6dB
thus 2km = -106, 4km = -112, 8km = -118 and 16km = -124
Then system gain =
1 at 30db (the TX power of 1 radio card only, the 1 facing the receiver)
1 at 24dB (1 of the antennas)
1 at 24dB (the second antenna)
Therefore system gain = 74dB.
Free space loss = -124dB system gain = +74dB... Therefore expected signal level is around 50dBm.
You have errors of up too 20dB in your system... Maybe you have pigtail disconnected, or maybe you have selected antenna "b" instead of antenna "a" on the radio card. Maybe pigtail is on wrong connector.
Like I said in earlier post,, what you are trying to achieve is possible with much smaller antennas and standard radio cards.. (chuck Alfa card in bin and go back to more regular cards!)
Those cards will give you all sorts of other problems, as well as other operators in your area.
I am sure that when you can get around -50 to -60dbm AT BOTH ENDS then the rest of your problems will go away.