<!doctype html public "-//w3c//dtd html 4.0 transitional//en"> <html> <body bgcolor="#FFFFFF"> Bill, My only qualification for answering you is that I have a Peterson 520 Strobetuner, which I used many years for help in setting an F-F temperament and did the rest of the tuning aurally.  Beyond that I found it unuseable.  I have since switched to RCT. A question in my mind is why you want to do pitchraises.  You don't need it for your own piano, since you hire a tuner to tune for you, so I assume maybe you rebuild and want to get the piano in the ballpark after restringing. To answer your question, I believe the Model 520 is in equal temperament but does not allow for stretch.  Because of that, I seriously doubt that it can be used even for pitchraises, if your hearing problem includes no pitch perception.  If you're chipping, I think it would be possible even with RCT or SATIII to be off by an entire octave and the machine won't tell you that.  If I'm wrong here, I'm sure someone will set the record straight. Peterson has a new instrument out now that compensates for stretch, so I'm told. Regards, Clyde Hollinger, RPT Lititz, PA, USA Bill Peterson wrote: <blockquote TYPE=CITE><style></style> Hi List,  I was wondering if there are any pre SAT users of Conn or Peterson strobe tuners.  I am looking for 88 note cents tuning scales for 6' pianos.  I have an old Peterson tuner and am wondering how it works.  I am an associate PTG member and have been for many years, but I do not tune because of a hearing problem.  I hire a tuner for my piano, but I would like to be able to do a fairly decent pitch raise myself.     Thanks, Bill Peterson So Bay Chapter.  You can E-Mail me at <a href="mailto:Lokman@ix.netcom.com">Lokman@ix.netcom.com</a>.</blockquote> </body> </html>