GoldStar Oscilloscope OS-9020A. 12 July, 201312 October, 2016 / Jour My GoldStar Oscilloscope OS-9020A 20Mhz, the thing works it might need calibration but hell for 70€ I’m more than happy to have it on my gear. Now I only need a true signal generator. Share this:FacebookTwitterWhatsAppRedditPrintLike this:Like Loading...