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timlim27
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Joined: Jun 15 2011 - 9:08pm
Some Help on an ongoing issue with my TT.

Hi all!

I have a problem with my Rega Planar 3 TT fitted with a Rega RB300 arm re-wired with Cardas and fitted with an Ortofon OMB5e (MM) Cartridge.

I am running the TT with an external Pro-Ject Phono Box SE.

I have this audible 5-7Khz noise that lasts for 5-10secs eaach time and it comes and goes even when the table is running or not running, be it if the arm is lowered or not. The noise comes from both channels equally.

I managed to borrow an oscilloscope from a friend and I've managed to isolate the problem to the TT only. I've consulted a professional and he said that it could be environmental problem. As I am staying quite near to a TV Broadcasting Station.

Some ideas on how to solve this problem please?

Thank you.
Tim,
Singapore

dbowker
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Joined: May 8 2007 - 6:37am
iPhone?

I have found iPhones, Kindles and pretty much any 3G device, when it is downloading/checking for email or other content makes some pretty nasty noises through my amp. Could be going through your phono amp, or just through the regular amp itself.

timlim27
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Well, that's absolutely

Well, that's absolutely possible. I havent tried that aspect yet. Well, any other ideas? keep it coming.

kager
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cables

Do the cables your using for your turntable have good shielding???

deckeda
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Disconnect the cables coming

Disconnect the cables coming from the Rega to the preamp. If the noise goes away you've discovered the entry point, either the cables or Rega (somehow.) If the noise remains disconnect the cables coming out of the preamp leading to the amp. If the noise then goes away you've discovered the entry point is either THOSE cables or the Pro-Ject, and so on.

Try cables with better shielding, or shorter runs, or add shielding to (namely) the Pro-Ject if you can. Overall, noise will enter at the weakest signal, which usually means the preamp and whatever comes earlier.

Wrap everything in lead. (Well, not really ...) If none of that works move the stereo to another part of the house if you can. Call the TV station and complain, perhaps. It may be that their equipment isn't performing correctly and they don't realize it.

JoeE SP9
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tv stations

Godd luck with calling a TV station about technical problems. I once called a local Phila. TV station to ask why they hadn't been broadcasting in stereo for the last week. The Chief engineer told me I didn't know what I was talking about. About an hour later their audio was back in stereo.

timlim27
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Last seen: 2 years 11 months ago
Joined: Jun 15 2011 - 9:08pm
Call the authorities to get

Call the authorities to get them to rectify their problems is always an issue.

That's why it's always my last resort.

Been playing around with the mains this week. Installed the Audioprism Quietline MKIII, laid a dedicated power line for my hifi.

Well, all of them don't work, guess I will have to try to solve the problem using the foil method.

Wrapping everything up like a chrome tank.

 

Somehow, I still feel it's the power that's causing the problem.

deckeda
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I didn't see where you tried

I didn't see where you tried to narrow it down to TT or to preamplifier or something else.

Then again now you seem to be saying it's "all of it?"

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