R
ranzy
Guest
I am new to owning a quad system. I grew up listening to quad because my dad bought a Pioneer QX-747 and a Pioneer PL-120 turntable which has an S-Shaped Tonearm w/ Lateral Balance Weight & an Audio-Technica AT12s Diamond Shibata Stylus (Tapered Cantilever) w/ a Dual Magnet Cartridge.
As a kid I can remember listing to records with him and he pointed out to me the 4 channel separation. I didn't really understand how a record could produce 4 channel separation, (I did understand stereo records) but I thought quad was cool. When I was in my early 20's I helped my dad replace his QX-747 with an Onkyo stereo amp, but never really wondered why he was replacing his old amp. He kept the QX-747 in the closet because he just couldn't part with it for some reason. At some point after that I did find out that it was broken, but I didn't really care about it too much. My father passed away on July 4, 2002 and I inherited some of his stuff. (Now I care about it) My mother is just fine but didn't want the old receiver or the record player, or even the Pioneer 8-Track player for that matter, so she gave them to me, along with all his 45's, albums and 8-track tapes.
I am self taught board level repair type of a guy, so I first found that the phono pre-amp and power supply were defective and this was the reason that my dad quit using the receiver. I was able to repair a couple of cold solders on the power supply and replace a few transistors on the preamp and I was off and going with the old system.
And now, Finally to my problem! I was making a few adjustments with the CD-4 setup record and everything seemed to be going fine. The separation was really cool and I was showing my son how good it sounded. The problem started to show as a popping sound only during CD-4 play, and then it all stopped. It just played in stereo and the red CD-4 light went out. It just so happens that I had another QX-747 that I bought on eBay for light bulbs and parts to fix the other problems, (I bid on it before I had fixed the board problems so I just had an extra one now) so I hooked the turntable up to the other amp and it played in cd-4 only for a few seconds and it too was popping and it also quit working.
I ordered two new Shibata styli from Garage-A-Records because I figured that my old AT12S was just worn. My plan was to only use a new stylus on quad records and the old stylus on stereo records because it sounds just fine on them. I even bought a new head shell and a used AT12SA cartridge so that I would only have to change the head shell. Now I realize that's not a good idea. I would have to adjust the tonearm weight every time I switched the head shell, so I don't plan to do that, but anyway none of the styli will play cd-4. The Old stylus has a 12S under the Audio Technica logo and I do believe it is just worn out. I wonder if the two new Styli are even Shibata because they do not have the 12S on the housing. Just the name Audio Technica under the logo. I went to www.garage-a-records.com website to see if the part number I got was at least supposed to be Shibata and it is, because it is Audio Technica and it is white.
Any Ideas?
Ranzy Campbell
As a kid I can remember listing to records with him and he pointed out to me the 4 channel separation. I didn't really understand how a record could produce 4 channel separation, (I did understand stereo records) but I thought quad was cool. When I was in my early 20's I helped my dad replace his QX-747 with an Onkyo stereo amp, but never really wondered why he was replacing his old amp. He kept the QX-747 in the closet because he just couldn't part with it for some reason. At some point after that I did find out that it was broken, but I didn't really care about it too much. My father passed away on July 4, 2002 and I inherited some of his stuff. (Now I care about it) My mother is just fine but didn't want the old receiver or the record player, or even the Pioneer 8-Track player for that matter, so she gave them to me, along with all his 45's, albums and 8-track tapes.
I am self taught board level repair type of a guy, so I first found that the phono pre-amp and power supply were defective and this was the reason that my dad quit using the receiver. I was able to repair a couple of cold solders on the power supply and replace a few transistors on the preamp and I was off and going with the old system.
And now, Finally to my problem! I was making a few adjustments with the CD-4 setup record and everything seemed to be going fine. The separation was really cool and I was showing my son how good it sounded. The problem started to show as a popping sound only during CD-4 play, and then it all stopped. It just played in stereo and the red CD-4 light went out. It just so happens that I had another QX-747 that I bought on eBay for light bulbs and parts to fix the other problems, (I bid on it before I had fixed the board problems so I just had an extra one now) so I hooked the turntable up to the other amp and it played in cd-4 only for a few seconds and it too was popping and it also quit working.
I ordered two new Shibata styli from Garage-A-Records because I figured that my old AT12S was just worn. My plan was to only use a new stylus on quad records and the old stylus on stereo records because it sounds just fine on them. I even bought a new head shell and a used AT12SA cartridge so that I would only have to change the head shell. Now I realize that's not a good idea. I would have to adjust the tonearm weight every time I switched the head shell, so I don't plan to do that, but anyway none of the styli will play cd-4. The Old stylus has a 12S under the Audio Technica logo and I do believe it is just worn out. I wonder if the two new Styli are even Shibata because they do not have the 12S on the housing. Just the name Audio Technica under the logo. I went to www.garage-a-records.com website to see if the part number I got was at least supposed to be Shibata and it is, because it is Audio Technica and it is white.
Any Ideas?
Ranzy Campbell
