The Sagil BH location was a bit too close to residential houses.
I was not prepared to see local council notice on it's door.
I told the owner that if we can play the external sound at a particular time of the day (peak hours) at a reasonable sound volume it will be the safe bet.
What this BH has was a special timer that will do just that.
All the AG 35 tweeters installed on the LMB frame were pushed to face the sky and not those houses.
Tested a couple of times and it was running perfectly.
The key objective of this BH is to attract as many young birds from the BH next door.
Beside those young birds the old birds do have a window of opportunity about 10 days after their babies flew out of the nest.
The LMB position, the external sound placement around it plus the external sound playing time were designed to optimize the drawing of those young birds from its neighbors.
The owner's son participated in the BH revamp operation.
He took some task to count the number of nests in the BH (145 pcs).
I predict that within a couple of months (6-8) the nests number will jump by at least 100%.
If it triple I will be very happy and feel honor to achieve the record number.
Please take note that after buying the unit the owner claimed that the nests during the change over was about 60 nests.
The total number of nest increased (after 4 years) was only 145-60= 85 nests.
I am looking at 145 new nests within 6-8 months.
I assured the owner that he will get that number and may be more.
As long as the BH is not attacked by any predator, the sounds runs perfectly and no burglars ransacking it , I believed it can performed.
What we need to do now is to wait and see how the nests will start to climb.