please-drive-faster

Hey Miles, Maybe you can help me. I was just wondering if you could help with some background about an amp. My dad has an old Guild Amp which I assume is from the 60s. It seems to be similar to a fender deluxe. The model appears to start with 66-...but it is barely readible after the hyphen. It has 4 inputs 2 labeled guitar and 2 labeled microphone. It has a 2 volume pots for each channel with a shared high and bass eq. Also, there's tremolo with two controls (speed and intensity) with a 1/4" footswitch jack. I can post some pics once I scan them if that would help. If you need any more info please feel free to ask. Thanks for any help.

Hello Myles, I read an article where you discuss the consistency of NOS preamp tubes compared to current models. I was wondering how the new Sovtek 5751 holds up to the NOS versions of the 5751, specificly the Sylvania. I haven't read much about the sovtek except that some people say that it has very low microphonics. Thanks for any reply.