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3D TV, High Definition Television, HDTV 4K and AV
Hi Fi section
Phono Stage noise on my amp
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<blockquote data-quote="excollier" data-source="post: 992563" data-attributes="member: 284272"><p>Tricky question here.</p><p>I am using gear I bought new back in 1980. The amplifier is a Panasonic SU-2800.</p><p>My problem is noise on it's phono stage, like a buzzing along with a regular "ticking" sound.</p><p>I have an Aiwa turntable which also has a built in switchable phono stage, but it was switched off as the amp has it's own phono stage. This noise has been there ever since I replaced the original Panasonic turntable that died a few years ago. This noise is very noticeable and gets louder after an lp has been played.</p><p>Last weekend I bought a Rega Planar 1 turntable (I have been promising myself a quality turntable for ages). This also produces the noise but not as loud.</p><p>To try to run a check, I plugged the Aiwa tt into a spare line input and switched on it's phono stage - there is the noise again, via a different input ( all other inputs are normally noise free) so I'm guessing - no hoping - that this noise is down to a noisy mains supply and that phono stages are sensitive to it and pick it up. No other inputs or peripherals produce this noise.</p><p>One other thing, if I touch the pivot joint at the end of the tonearm on the Rega the noise gets louder until I remove my finger, even with the turntable powered off.</p><p>I have tried other power outlets too, but no difference, and the mains leads are away from any rca/phono leads.</p><p>Any thoughts and tips on this would be helpful.</p><p></p><p> With the turntable unplugged from the amp inputs the noise changes, more of a very quiet "white noise" than a buzzing, and no "ticking". Perhaps a grounding issue as both turntables have no ground wire, where the original Panasonic tt did have one and was noise free.</p></blockquote><p></p>
[QUOTE="excollier, post: 992563, member: 284272"] Tricky question here. I am using gear I bought new back in 1980. The amplifier is a Panasonic SU-2800. My problem is noise on it's phono stage, like a buzzing along with a regular "ticking" sound. I have an Aiwa turntable which also has a built in switchable phono stage, but it was switched off as the amp has it's own phono stage. This noise has been there ever since I replaced the original Panasonic turntable that died a few years ago. This noise is very noticeable and gets louder after an lp has been played. Last weekend I bought a Rega Planar 1 turntable (I have been promising myself a quality turntable for ages). This also produces the noise but not as loud. To try to run a check, I plugged the Aiwa tt into a spare line input and switched on it's phono stage - there is the noise again, via a different input ( all other inputs are normally noise free) so I'm guessing - no hoping - that this noise is down to a noisy mains supply and that phono stages are sensitive to it and pick it up. No other inputs or peripherals produce this noise. One other thing, if I touch the pivot joint at the end of the tonearm on the Rega the noise gets louder until I remove my finger, even with the turntable powered off. I have tried other power outlets too, but no difference, and the mains leads are away from any rca/phono leads. Any thoughts and tips on this would be helpful. With the turntable unplugged from the amp inputs the noise changes, more of a very quiet "white noise" than a buzzing, and no "ticking". Perhaps a grounding issue as both turntables have no ground wire, where the original Panasonic tt did have one and was noise free. [/QUOTE]
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Hi Fi section
Phono Stage noise on my amp
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