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Nakamichi Pa-7 Nakamichi CA-5 Noise Problem Input

Hi,
I have a Nakamichi PA-7 with a Nakamichi CA-5 pre amp. I have had it since new and have never been able to input anything TV related through the pre amp without a very prominent line noise - the kind that lets you know you're doing something that you're not supposed to.
Does anyone know why I can't input, for example, my Cox digital music channels through my system?
emallia18a9
fetguy
90 posts
 
You may be having a ground-loop caused by your cable. You can get an isolation transformer for it for a few bucks ($5 or $10) that will isolate the cable ground from the system but let the signal get through. Your tv service man can let in on the details.
bradshugart6ff9
1 posts
 
My first thought is the Nakamichi pre-amp and amp in question are analog units. I don't think they accept a "coax" digital signal.

Also I don't think feeding them anything but a "Line Source Signal will work. Meaning no amplification of the signal before it enters the Naks.

Hope this helps.

Brad
viggen
838 posts
 
I sold my old Nak CA7A to my bro in law and hooked it up for him in his system with a dvd and cable being fed into the preamp's inputs which are all connected to the TV as well. At first, I used a Mapleshade powercord feeding the Nak, and there is a nasty hum as a result. I switched to a Virtual Dynamics P3, and the problem went away.
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