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The RFI Problem
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Graham Slee View Drop Down
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Joined: 11 Jan 2008
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Points: 16314 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Graham Slee Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jun 2008 at 6:43pm
The way to eliminate RFI when using high gain circuits is not to use silly unshielded interconnects (yes on the output of the Gram).

How many times must I explain?
That none should be able to park up and enjoy the view without a smartphone and the knowledge in how to use apps
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damianwo View Drop Down
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Joined: 12 Jun 2008
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Points: 8 		Post Options Post Options   Thanks (0) Thanks(0)   Quote damianwo Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jun 2008 at 8:45pm
Thanks.  Sorry.
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tg [RIP] View Drop Down
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Points: 1866 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tg [RIP] Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jun 2008 at 12:35am
Damian,
maybe try a pair of Blue Jeans LC1 from http://www.bluejeanscable.com/store/audio/index.htm , they are good quality, well shielded and inexpensive.
The service is very quick too.
Or have a look around this forum for instructions on how to make your own using CT100 cable (although the proper cable is not so easy to find)
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Graham Slee View Drop Down
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Points: 16314 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Graham Slee Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jun 2008 at 6:28pm
Originally posted by damianwo damianwo wrote:

Thanks.  Sorry.


No need to apologize damianwo, I sometimes need to be firm to get the message across not only to the questioner but to others who may be asking the same. Smile
That none should be able to park up and enjoy the view without a smartphone and the knowledge in how to use apps
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ServerBaboon View Drop Down
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Points: 970 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ServerBaboon Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jun 2008 at 12:36pm
Originally posted by mike49 mike49 wrote:

 So I have found a solution
to eliminate RFI and hummining:
I have realised a shielding according to the recommendation given by Graham and put
it around the tonearm cable. (dealer adress)


Now RFI is completely banned and I´m
enthusiastic about sound performance and dynamcis.

Does this shielding affect the capacitance of the tone arm cabling?

Originally posted by tg tg wrote:

mike49,
very good to read of your positive results in applying shielding to your tonearm cable.
My german is small to non-existent and I made little sense of the link, is this product a loose sleeve that it is possible to pass the original cable through ?
Interesting also that the Era Gold/Exp combination seem to reduce the noise floor and resolve the micro detail more effectively and allow this interference to be heard (no gain without pain :D )

TG Give http://translate.google.com/translate_t a try in situations like this, sometimes the literal translation is amusing but you tend to get the gist.



Edited by ServerBaboon - 14 Jun 2008 at 12:42pm
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damianwo View Drop Down
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Points: 8 		Post Options Post Options   Thanks (0) Thanks(0)   Quote damianwo Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jun 2008 at 10:14pm
I've ordered a set of Belden 1694A cables from http://www.bluejeanscable.com.  I chose these over the Blue Jeans LC1 suggested by TG as the specification suggests that these are better for RFI which my main concern.  They certainly look very heavily shielded with both braid and foil shields.  I'll let you all know how I get on.
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damianwo View Drop Down
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Points: 8 		Post Options Post Options   Thanks (0) Thanks(0)   Quote damianwo Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jun 2008 at 10:15pm
By the way, Paul Spetz from Anti-cables has been very helpful and offered me either a mod to his cables to give additional RFI protection or a refund.  As I had already ordered the shielded cables from blue jeans I have gone for the refund.
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