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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
Post removed 
hifigy
59 posts
 
I too had a similar problem. I floated the ground on the amp
(cheater plug) and the problem diminished. I also took two 75 to 300ohm transformers and connect to 300ohm sections together. that'll give you two 75 ohm f connectors to patch into your cable feed. This solved my problem. BTW this is a poor mans Magic Box & it works just as well & saves you $90.
Hope this helps.

Tim
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
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