13
« on: April 08, 2008, 07:18:00 AM »
Thanks DocB and Craig.
I found Athan and I will decide between getting a new pinch roller or getting it re-worked. I have spent last evening cleaning the tape path. One would not believe how much can be accumulated after 18 years. I thought that the tape lifters vere made from brown plastic. Well, after a lot of cleaning I discovered that they are steel. I think at least one is supposed to turn. But since they were completely covered with baked on oxide, there are flat spots and I will have to get new ones.
I tried to subscribe to Studer list some 10 days ago but somehow it did not go through. I will try again. I got a quote from Greg Orton for an extended response playback head. I will get it when there are finances for it (after Tape Project membership).
I had a look at Studer A807 schematics. It is a pretty complicated machine with microprocessor control to give studios easy cueing and other controls, together with quick selection of equalizations. But the audio portion is designed like a typical PRO circuit. I am not surprised at all that recorded music sounds as it does and if it was not for the Tape Project, I likely would not bother. The playback path (without VU and level adjustment portion) goes through 1 transistor, 12 OP AMPs, some DACs and 14 (!) electrolytic capacitors ranging from 4.7uF to 100uF. Recording path is similar. So that is what we listen when we play anything - LP, CD or tuner. Repo amp or eq. is the only way to go. Or, how will Studer A807 look with Ampex 350 electronics? :-)
Regards,
TonyB