If it's labeled distribution amplifier then their use are to amplify and split up signals that already have been amplified to a high level using a pre-amp, mast amp, antenna amplifier or whetever they can be called.
Distribution amplifiers do not need to be low noise and often have high internal noise. Antenna amplifiers need to be low noise and preferable be able to handle high signal levels without creating intermodulation problems.
Most distribution amplifiers are still fine and are neccesary if you need to split a signal. I can even use a $15 CATV inline amplifier for satellit dish to improve reception if I connect it between coax and scanner if I have a variable attenuator between amp and scanner. Seems like most scanners have higher internal noise than cheap CATV amplifiers.
Are you sure that the receivers you are using have survived the strike? What is the problem with the new distribution amplifier, weaker signals or interference? Remember that in almost all cases when using an amplifier you will need to attenuate the signal using a variable attenuator to not overload a receiver, which will either show as ghost frequencies and/or reduced sensitivity. Maybe the new AD gives too much signal and needs to be attenuated.
/Ubbe