B
berninahusq
Guest
Okay, I have two of these puppies and don't know how to calibrate them to get true discrete CD-4 playback. I don't have a user's manual, only a service manual I got from the Quadfather. I am using an Grado F1+ and AT 15sa cartridges. The following problems happen identically with both of my 4DD-5s. I wonder if anyone can please help me.
I just bought this CD-4 Quadradisc 4-Channel/2-Channel Test Record SB4X-002 by Sutton-Miller Ltd. It has all the CD-4 tests you'd expect, (CD-4 carrier present test, 4 channel balance test, etc.). What I was surprised to see was that both the front and rear channels had a signal almost of equal strength whether or not just the rear or front channel was supposed to play alone. The same happens for the left channels. This is like playing a SQ matrix record through a non-Tate passive matrix decoder. Lots of front-to-back, back-to-front channel bleeding. I've adjusted the CD-4 Left and Right Level controls in the back and also the 30kHz Carrier Level adjustment underneath the unit.
The CD-4 signal light goes on and off when the test record says it should, but I'm not getting discrete sound like I should. I don't have a CD-4 record that I can compare with its Q8 tape equivalent. I just assumed that my CD-4 records' program material was not as discrete as some on my Q8s. Are the CD-4s supposed to be AS DISCRETE as their Q8 counterparts?
Not having ever heard a pristine CD-4 demo in my life, I don't know what I should expect of CD-4. Could both my 4DD-5s be broken? Any help would be appreciated.
Thanks--Ed
I just bought this CD-4 Quadradisc 4-Channel/2-Channel Test Record SB4X-002 by Sutton-Miller Ltd. It has all the CD-4 tests you'd expect, (CD-4 carrier present test, 4 channel balance test, etc.). What I was surprised to see was that both the front and rear channels had a signal almost of equal strength whether or not just the rear or front channel was supposed to play alone. The same happens for the left channels. This is like playing a SQ matrix record through a non-Tate passive matrix decoder. Lots of front-to-back, back-to-front channel bleeding. I've adjusted the CD-4 Left and Right Level controls in the back and also the 30kHz Carrier Level adjustment underneath the unit.
The CD-4 signal light goes on and off when the test record says it should, but I'm not getting discrete sound like I should. I don't have a CD-4 record that I can compare with its Q8 tape equivalent. I just assumed that my CD-4 records' program material was not as discrete as some on my Q8s. Are the CD-4s supposed to be AS DISCRETE as their Q8 counterparts?
Not having ever heard a pristine CD-4 demo in my life, I don't know what I should expect of CD-4. Could both my 4DD-5s be broken? Any help would be appreciated.
Thanks--Ed