The AERIALS 443 Repeater system is constantly being improved.
Prior to the installation of a new repeater cabinet to better orgranized the equipments and provide better shielding and cooling the system developed into what is seen in the photos below.
We have been running a temporay amplifier based on a GE Master II mobile with additional cooling added. It is planned that the new repeater to be built will be Master II based with a rack mount continuous duty amplifier. Here are some shots of the system from the front:
From top to bottom is the Wacom duplexer, next what was a dbProducts 3 cavity duplexer and is now a 3 cavity receiver pass/reject filter. Under the cavities is a four fan A.C. powered, individually fused cooling panel, that will later be swapped out for all D.C.fan panel when the battery backup system is replaced. Then comes the GE Exec II exciter/receiver, under it is a GE Master II M mobile that has been configured temporarily just as an amplifier by bypasssing the exciter/receiver and strapping the T/R relay and adding a input jack to connect the drive from the GE Exec II. Then comes the Astron power supply and lastly the ACC RC-96 repeater controller that is still partially encased in tin foil for additional shielding. At the bottom of the cabinet is the old battery backup system that is shot, a new deep cycle battery and charging system is under development.
Here is the exciter cabling from the GE Exec II exciter/receiver to the GE Master II amplifer as seen from the cabinet front.
In this photo we see the output from the amplifier.
Here is the rear of the amplifier just under the cooling fans. This unit is not heat sinked for continius duty, however the extra heavy cooling is keeping it ice cold.
Another view of the cabling from the GE Exec II exciter/receiver to the GE Master II amplifer as seen from the cabinet front..
A close up of the Wacom and dbProducts duplexer from the rear. The Wacom duplexer has been retuned and a dbProducts duplexer has been reconfigured and tuned as a pass/reject filter for the ultimate in receiver filtering.
In this close up to far left the Advance Receiver Research (ARR) receive preamp can been seen with the red label, 17db gain pre-amp (19.5db gain measured). After removing the old lossy Motorola pass cavity and retuning the Wacom duplexer and adding the extra pas/reject filtering we ended up with an additional 10db receive gain and another -65db of 443 rejection.
Here are some shots of the new D.C. power buss:
The D.C. power buss has been improved, however it needs to be completely redone as does the battery backup system.
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AERIALS, Inc.
U.S. Post Office Box 8
Morganville, N.J. 07751-0008