<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I was reading up on what Nuvistors were, I knew they were tubes from the many discussion of headwheel preamps here, but I didn't know much beyond that.<div>On Wikipedia they mentioned an Ampex audio tape recorder called a MR70 that used Nuvistors extensively and I started researching that.</div><div><br></div><div>I found this video on someone's restoration of a MR70</div><div><br></div><div><a href="http://www.youtube.com/watch?v=lIDHs3kmGj4">http://www.youtube.com/watch?v=lIDHs3kmGj4</a></div><div><br></div><div>What I find interesting about this is the consistency in how Ampex tape machines worked. How you could just push the reels back-and-forth seems like a magic trick for someone raised on Sony Umatic, Betacam and Type-C machines. It would seem that nobody else engineered things quite like Ampex did.</div><div><br></div><div>Sorry for the diversion, now back to your regular programming.</div><div><br></div><div>Scott Thomas</div></body></html>