Help with Mic Preamp......Please

[FatherTime]

I recently obtained a mic pre from a place that is full of old 6ft green racks stuffed with altec gear. My pre says altec only on on the transformers, but I have to assume. Does anyone know anything about this unit? Thanks
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[Earl K]

Your 5101 preamp was made by JBL .

It seems to have been modified by someone ( to accept mic &/or line level signals ??? ) .

Look within these catalogues for a bit more info ( that's about all I know );
http://www.lansingheritage.org/images/jbl/catalogs/thumbs/1971-pro_small.jpg (http://www.lansingheritage.org/html/jbl/catalogs/1971-pro.htm) http://www.lansingheritage.org/images/jbl/catalogs/thumbs/1974-pro_small.jpg (http://www.lansingheritage.org/html/jbl/catalogs/1974-pro.htm)

<> cheers

[FatherTime]

Thanks dude.