Someone know this ?
http://www.ebay.de/itm/EMT-157-Schneidkurven-Ersatzschaltung-inverse-RIAA-Filter-Enzerrpruefung-246-/390727352392?nma=true&si=Ib0OHHlNm2HQFBnHWQe6cNtpQIw%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
Emt 157
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