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Old 27th February 2014, 12:16 AM   #11
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Well this stuff look a little more reasonable PTFE Wire Type PTFE - E 20 awg 19 Strands - Silver Plated Copper
Thank JP for draggin my mind out of the snake oil gutter and helping me to spend the money where it counts most.

Now, who sells unobtanium braid?
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Old 27th February 2014, 01:12 AM   #12
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Another question

Given the individual wires are only using a Teflon coating should I twist them around each other and then apply a shielded braid over them all?

Does the twisting matter in this application?

Does the shielded braid matter or would unshielded be fine?

So many questions; so little money left
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Old 27th February 2014, 02:07 AM   #13
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Oh and I should add that i have bought these connectors which allow me to run one or more ground wires through the umbilical.

Amphenol Industrial MS3102E20-27S Circular Connector Socket, Environmental Resisting, Threaded Coupling, Solder Termination, Box Mounting Receptacle, 20-27 Insert Arrangement, 20 Shell Size, 14 Contacts: Amazon.com: Industrial & Scientific

http://www.amazon.com/dp/B007XZ62P2/..._26725410_item

Very reasonable prices which steered me away from an earlier suggestion (that was appreciated)
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Old 27th February 2014, 03:00 AM   #14
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When you say the PS will be on a second chassis, do you mean just the PT or PT and rectification? I've never shielded an umbilical, but mine have always carried DC only.
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Old 27th February 2014, 11:12 AM   #15
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Rectification will remain on the main chassis so JUST the PT on the second chassis.
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Old 27th February 2014, 03:07 PM   #16
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My experience won't do you much good then, as I said I've only done it with DC on preamps. I've never had an issue with a PT on the same chassis as the amp, so I've never bothered.
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Old 28th February 2014, 01:04 AM   #17
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Amphenols arrived. Nuclear war proof equipment: WOW!
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Old 28th February 2014, 01:59 PM   #18
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FWIW, the Bulgin Buccaneer connectors linked in your first post are only rated for 150VAC/VDC.......not really enough for a 360V transformer.

The Amphenol connectors are very burly (metal!); another good choice are Amp CPC series (circular plastic connectors), many of these have a 600V dielectric rating.
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Old 28th February 2014, 10:13 PM   #19
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The Amphenols are rugged and I think I made a good choice.

Now I need to figure out the rest of the connection.

I'll be back with more questions.
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Old 1st March 2014, 03:14 AM   #20
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OK, here we go:

If I get teflon coated 18 gauge copper for ALL the connections form the PS (600V certified), should I twist pairs and then surround the whole bunch (including the ground wire) with a SHIELDED or NON SHIELDED braid (or some other combination)?

I have 14 pins to play with on the connectors so I figure I can run the ground down the center and then twist the various AC wires from my Edcor 131 to create a small number of twisted pairs plus a ground.
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