aifrecords
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these rca considered qs or sq? anyone know?
RCA QuadraDiscs (and the handful of Dynaflex QuadraDisc releases) are for the CD-4 Quadraphonic system.
for CD-4 to work properly you will need a CD-4 disc demodulator unit and a phono cartridge with a Shibata or similar profile stylus that can resolve the high frequency response required.
some phono cartridge manufacturers used different names to describe the Shibata type stylus, including Audio Technica's "MicroLine".
all aspects of turntable setup, i have found, are crucial to getting good CD-4 Quadraphonic sound.
then the discs need to be in good shape, very clean, etc.
if you have time on your hands (and patience) go for it, it can be fun and frustrating in equal measure but it is worth it.
if you want plug and play Quad, i would say SQ and especially QS are easier formats to setup.
check in with us here anytime and we will try our best to help you for sure
thank you fred, I am trying to find a diagram or answer to how do u hook up a regular 4 channel stereo receiver to one of these old demodulators? every in goes to out and vice versa i know, so would i go from outs of demodulator to tape ins/play of say tape one or two in the back of my stereo amp? then just plug turntable into phono holes on back of my stereo amp like I always do? the google diagrams are for people with engineering degrees and dont specifically address quad set up and cd-4 needs.
Oh, and "Dynaflex" has nothing to do with quad. It's the name for discs RCA originally released in the early seventies which are very thin and flexible. They claimed Dynaflex discs actually warped less than thicker discs. Whether they did/do or not had been a source of debate since they debuted.
Doug
The short answer is: Plug your turntable into the CD-4 demodulator Phono inputs. Plug the CD-4 demodulator outputs into the "Discrete" inputs on your quadraphonic amp.thank you fred, I am trying to find a diagram or answer to how do u hook up a regular 4 channel stereo receiver to one of these old demodulators? every in goes to out and vice versa i know, so would i go from outs of demodulator to tape ins/play of say tape one or two in the back of my stereo amp? then just plug turntable into phono holes on back of my stereo amp like I always do? the google diagrams are for people with engineering degrees and dont specifically address quad set up and cd-4 needs.
I have never used the direct output of a demodulator or connected the turntable to the phono inputs on an amplifier/receiver with which I am using an external demodulator. I let the demosulator switch between CD-4 and stereo automatically and it has always worked. That way, you get output from all speakers which is far more satisfying, in my opinion.
Matrix decoders can then be connected as usual into the tape monitor loop.
Doug
Hmmmm...there's more than one way to skin the rabbit for sure
i prefer to take the direct output and use an external phono preamp for 'non-CD-4' records as my Pro-Ject preamp has adjustable capacitance, impedance, gain, etc., which is useful depending on which cart i'm using for SQ, QS, etc.
there's more than one way to skin the rabbit for sure
i prefer to take the direct output and use an external phono preamp for 'non-CD-4' records as my Pro-Ject preamp has adjustable capacitance, impedance, gain, etc., which is useful depending on which cart i'm using for SQ, QS, etc.
Nice, clean organized set up. As you state there are decent reasons for having multiple TT's. Myself, I've always only had one. But the 80's an older quad friend had 3: one was a beast with idler wheel drive and good torque for cleaning with a Disc Washer. Then a TEAC table with CD-4 cart. I forget what his other TT was but it was unique in that it used a $$$ MC cartridge.Of course but, no matter how you decide to skin the rabbit, the rabbit ain't gonna like it.
Anyway, what I wrote above applies only when I have my simplified setup, using only one turntable/cartridge. I used to have a more complex arrangement with one table dedicated to CD-4 and the other for everything else. The matrix decoder and demodulator were switched in separately and I was able to do it because the Heathkit AA-29 amplifiers I was using have two aux. inputs which adds a lot of flexibility.
I intend to eventually go back to that setup because it eliminates having to switch cartridges if I don't want to use a CD-4 cartridge on anything but CD-4 records, to preserve the stylus. As it is now, I switch back and forth on the same table which, even though it isn't a huge deal, I would rather not have to do it.
Here is what it looked like set up as I described:
View attachment 61688
Doug
Actually, I guess I had three tables, too. The Dual 1019 there was for playing 78's. It is currently at my son's as he played an old 78 into his computer, made at Paramount Studios in the early forties of a song my great grandmother wrote. It became fairly scratched up from we kids playing it on various players and not handling it exactly carefully. He has been trying to remove the noise from it which has proved to be difficult, finding a threshold where the noise is removed but the music is left.
Now if the author would just re-open the store. It's been unavailable for long enough now that I have a bad feeling about it:
https://clickrepair.net/password
Very sad.
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