The new model AAA-1C is now available. There are changes to improve the mode and relay control circuit. Now the control circuit is optically insulated from the FTP cable control signals. This will improve the noise immunity and influence from strong electromagnetic pulses. An additional connector (parallel to RJ45) with terminal blocks (with screws) is added which permits to connect the FTP cable directly and not to use RJ45 plug. This might be important when other types of protected compartments are used.
All models of AAA-1 kit are compatible to each other and can be interchanged. The control signals in all models do not differ between each other and they can be used in phased arrays with VDL-1 variable delay line.
In AAA-1C there is no change in main electrical parameters as gain, frequency response, noise and dynamic range compared to AAA-1B model. The Control board is not changed.
73, Chavdar LZ1AQ