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  #1  
Old 21st January 2007, 07:39 PM
graeme
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Default arm wiring interference.

I just rewired my arm with satcure litz, enameled strand, silk wrapped.

I now have a bad hum though. The wire replaced magnet wire.

All 4 wires are threaded through the arm, then there bare for about 7 inch (needed for arm movement) then there sandwiched between two layers of packing tape right down to the phono's.

The magnet wire was exactly the same except they were taped to the outside of the arm.

What could be making it hum now, but not before?

The new wiring is about 50cm longer than before, but i doubt that matters.

Any suggestions for what may be causing it? If i touch the wires the hum changes.


Apart from that, the satcure litz sound very nice
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  #2  
Old 21st January 2007, 07:45 PM
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Shane Shane is offline
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Default Re: arm wiring interference.

I think you might want to edit the first line. Some people may find it littilating...
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  #3  
Old 21st January 2007, 07:46 PM
graeme
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Default Re: arm wiring interference.

:d
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  #4  
Old 21st January 2007, 11:31 PM
Assie Ian Assie Ian is offline
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Default Re: arm wiring interference.

Graeme.

Sounds like the same problem Neal Gibson from Hi Fi World Page 52 Nov 2006.
had he came up with a fix by runnig some flying earth leads.

Im sorry im new to Turn tables so I hope I have not upset anyone.

P.S You Guys on here are the best thanks for the photo from Witham good to be able to put face to names.
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  #5  
Old 22nd January 2007, 04:07 PM
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François François is offline
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Default Re: arm wiring interference.

Quote:
Originally Posted by graeme View Post
I just rewired my arm with satcure litz, enameled strand, silk wrapped.

I now have a bad hum though. The wire replaced magnet wire.

All 4 wires are threaded through the arm, then there bare for about 7 inch (needed for arm movement) then there sandwiched between two layers of packing tape right down to the phono's.

The magnet wire was exactly the same except they were taped to the outside of the arm.

What could be making it hum now, but not before?

The new wiring is about 50cm longer than before, but i doubt that matters.

Any suggestions for what may be causing it? If i touch the wires the hum changes.


Apart from that, the satcure litz sound very nice
Graeme,
Non screened/shielded wires running in the air ??? Hum, hum.........
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  #6  
Old 22nd January 2007, 06:35 PM
Gerry Gerry is offline
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Default Re: arm wiring interference.

Graeme,

I had this too with Satcure when I had about 5" runing free.
I just wound some wire around it it in a coil , not touching, solder works and it went. Acts as a shield.

Regards
Gerard
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  #7  
Old 22nd January 2007, 07:05 PM
graeme
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Default Re: arm wiring interference.

The problem is i need about 7 inches free for movement. If i wrapped a loose coil round it as you said it will need to be about 12cm diameter

It didnt hum before, so i dont think this is the problem. I pulled it all out and i think i had some wires shorting as the silk got ripped away in places.

Ill try again later and see it it goes.

Thanx
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  #8  
Old 22nd January 2007, 08:51 PM
spikeyfaz spikeyfaz is offline
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Location: Worthing, West Sussex, UK
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Default Re: arm wiring interference.

Sorry to hear you're having problems with the Satcure wire .

The insulation on this wire is very fragile (as you seem to have discovered) and even when it's intact, it just doesn't seem to screen out interference. I had earth leads running everywhere on my set-up but to no avail.

Francois who runs the Lenco-Lovers forum and who also posts on this forum put me onto a decent supplier, based in Canada I think. You could try asking him for details as I've gone completely blank on their name . I seem to recall that on their website they actually specified different grade wire for unipivots, so they seem fairly on the ball. Watch the import duty though. I know this is more expense but I really think you owe it to yourself to get some better wire. You can always save some money elsewhere by getting a Denon 103 rather than a 103R.
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  #9  
Old 22nd January 2007, 09:21 PM
graeme
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Default Re: arm wiring interference.

im sure i can overcome the problems. It sounds much better with the satcure, and its nice and flexible. The last wiring i had i was using the sample you gave me for the bare section and it didnt hum. Im sure it was either a short or a bad connection.
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  #10  
Old 22nd January 2007, 10:08 PM
spikeyfaz spikeyfaz is offline
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Default Re: arm wiring interference.

Graeme, I had to paint some of the wire I had with nail varnish (and no, it's wasn't mine!!) to make good some insulation tears. Always worth a try I suppose.
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