The GTP-740, 750 and 760 have a nasty little problem burning up the rectifiers. I have replaced all of the rectifiers on my 740 (I believe there were four of them) on the power supply boards and it worked perfectly (sold it off) - no hum and gets rid of the irritating dim display problem too...
I just bought a GFP-750 (easy to remember - GFP as in Great Frickin' Preamp) since it is a Nelson Pass Designed Balance pre, very much like the Aleph P...
I just bought a GFP-750 (easy to remember - GFP as in Great Frickin' Preamp) since it is a Nelson Pass Designed Balance pre, very much like the Aleph P...