Its me again
I have a pair of siemens compressors, model ELA 75-16b. Still non working because the lack of info. They are labelled "telecomunicazioni auso siemens" and I got them in Italy. I´m sure are made by siemens and exported for auso Italy. I think siemens exported to several countries under different branches (Austria, Italy...)
Again, do you have documentation for this model? Also, some of the history about the Siemens connections with broadcast outside Germany would be a delight to read!
Best Regards
Synthi