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Old 26th May 2015, 02:21 AM   #1
355F1 is offline 355F1  United States
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Join Date: Mar 2008
Location: Pinecrest, FL
Smile Cannot figure out where to solder a cable

Hello,

I have a SME van den Hull M.C. D 501 Silver Hybrid cable.

The cable has 2 signal lines one blue and the other white and a dense hybrid shielding. One end is factory terminated with SME RCA type connectors, the other end is unterminated [unsoldered].

I unsoldered it from a Garrard/Syrinx combo I had. I now have decided to use it as an interconnect but since it has been stored for several years I really do not remember how it was connected to the tonearm.

The white [grey?] line is the hot, the shield is the ground but the blue line, apparently, is not connected to anything, the meter shows no continuity. Please see photos.

What do I do with the blue wire? I unscrewed both RCA jacks to see where the blue line is but I cannot pull the caps back enough without ruining it since there is a spring and a stop on each jack.

Any recommendations?
Attached Images
File Type: jpg VAN DEN HUL_4.JPG (375.7 KB, 79 views)
File Type: jpg VAN DEN HUL_3.JPG (416.0 KB, 78 views)
File Type: jpg VAN DEN HUL_1.JPG (381.2 KB, 74 views)

Last edited by 355F1; 26th May 2015 at 02:26 AM.
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Old 26th May 2015, 02:42 AM   #2
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Join Date: Oct 2014
If the blue shows no connection to anything than don't hook it up. It's just an extra wire. The white sounds like your signal wire, it goes to the RCA tip, and the braided ground goes to the RCA shell so there is your complete cartridge circuit. What is the ground clip attached to?

BillWojo
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Old 26th May 2015, 03:00 AM   #3
rayma is offline rayma  United States
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Quote:
Originally Posted by 355F1 View Post
What do I do with the blue wire?
It's intended that the two internal wires be used for signal and return. The shield is for just that, and not for the signal return.
You could connect the shield to ground at one end only. Usually that end would be connected to the source.
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Old 26th May 2015, 03:59 AM   #4
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rayma, normally I would agree with you but he said that the cable came configured that way. It seems to me that the 2 wires should be signal wires and shielded as the signal level is very low. Maybe he can contact the manufacture.

BillWojo
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Old 26th May 2015, 04:04 AM   #5
BigE is offline BigE  Canada
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Location: Toronto
Perhaps VDH uses the blue wire when balanced connectors are installed?
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Old 26th May 2015, 04:19 AM   #6
benb is offline benb  United States
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Join Date: Apr 2010
Quote:
Originally Posted by 355F1 View Post
Hello,

I have a SME van den Hull M.C. D 501 Silver Hybrid cable.

The cable has 2 signal lines one blue and the other white and a dense hybrid shielding. One end is factory terminated with SME RCA type connectors, the other end is unterminated [unsoldered].

I unsoldered it from a Garrard/Syrinx combo I had. I now have decided to use it as an interconnect but since it has been stored for several years I really do not remember how it was connected to the tonearm.

The white [grey?] line is the hot, the shield is the ground but the blue line, apparently, is not connected to anything, the meter shows no continuity. Please see photos.

What do I do with the blue wire? I unscrewed both RCA jacks to see where the blue line is but I cannot pull the caps back enough without ruining it since there is a spring and a stop on each jack.

Any recommendations?
I see three points that could have possible connections in those RCA connectors. The gold center pin is obviously hot, the gold ring (the usual ground on RCA connectors), and the silver handle-and-spring-strain-relief. A moment's thought suggests these connect to the white, blue, and shield respectively. Is this not so?
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Old 26th May 2015, 10:31 PM   #7
355F1 is offline 355F1  United States
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Join Date: Mar 2008
Location: Pinecrest, FL
Hey guys, I think that I found part of the answer.

Finally, I decided to pull the cap back and push the spring backwards. I did not have another alternative but luckily I did not ruin it.

Much to my surprise the SME RCA jack has two separate flat pins sitting at 180 of each other, please see photos.

One with the blue wire, with yellow paint, and the other, with red paint, is the braided ground which, in this case, is soldered to the gold ring. The white is in the pin.

There is no connectivity between the gold ring (the usual ground on RCA connectors) and the silver handle-and-spring-strain-relief.

I do not have another set of SME RCA jacks so I cannot use the same configuration.

Now, my question is what do I do with a regular RCA jack that has only two contacts?

Could this be a factory terminated cable or done flimsily by the previous owner?

Cheers
Attached Images
File Type: jpg RCA_4.JPG (385.1 KB, 29 views)
File Type: jpg RCA_5.JPG (361.7 KB, 29 views)
File Type: jpg RCA_2.JPG (393.1 KB, 12 views)
File Type: jpg RCA_3.JPG (446.4 KB, 13 views)
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