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Author Topic: Schoeps KCY cable  (Read 34208 times)

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Offline hi and lo

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Re: Schoeps KCY cable
« Reply #60 on: October 06, 2011, 04:01:14 PM »
I'm curious too!!  I was wondering if one of our resident cable builders (Ted/Rob) could build a KCY.  I wouldn't mind having one built with thinner cable like Belden 1804a or AT starquad.  Seems like the Colettes would be the only thing to order from Scheops. 

Anybody have a wiring diagram for the junction box?

That's exactly what Nick does for nbox cables. IIRC, it's about $550 in parts for the Schoeps MK Connectors.

Assembly, however, is not for the faint of heart and I would be reluctant to say that Ted or Rob would want to take on this responsibility. I know that Freelunch has assembled a collette before and from what I understand, each connector requires at least 15 very delicate solder joints. There is a reason you pay a professional, authorized retailer like Vark to do this work.

I think Vark is still the way to go if you want something other than stock Schoeps cable, but I am not entirely impressed with their larger junction box. The stock one is much smaller and looks significantly better, imo.

Offline darktrain

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Re: Schoeps KCY cable
« Reply #61 on: October 06, 2011, 04:32:02 PM »
Yeh, I don't know about assembling a collette but as far as extension cables go, thats pretty straight forward

Offline yug du nord

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Re: Schoeps KCY cable
« Reply #62 on: October 06, 2011, 05:46:04 PM »
I've never made a KCY extension, but I'm with Robb on this.  IMO....   if wiring up the collettes was fairly simple, I think that more folks around here would be doin it.  I think that is why Nick's knowledge is priceless.  He wires the collettes, correct?  I know that you can purchase the collettes with cable attached, but I "think" that Nick does the work.....  maybe?? 
Just a thought out loud.....  maybe a pair of "wired" collettes could be ordered, and then "spliced" together via a junction box??   

Delicate work with expensive parts + Not much knowledge with the parts = A potentially scary lesson learned.

.....got a blank space where my mind should be.....

Offline H₂O

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Re: Schoeps KCY cable
« Reply #63 on: October 06, 2011, 08:18:00 PM »
Building a KCY from a pair if KC5's is very straight forward - I almost made a set but sold my extra set of KC5's.   I actually had Redding get together the parts and I believe it was about $250 in parts from Schoeps in addition to the KC5's - to make a a KCY and AKI.

This is using the Schoeps boards, WIMA Caps, the junction boxes, Schoeps provided Binders, and 4 conductor Schoeps cabling.


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Offline hi and lo

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Re: Schoeps KCY cable
« Reply #64 on: October 06, 2011, 08:22:24 PM »
Building a KCY from a pair if KC5's is very straight forward - I almost made a set but sold my extra set of KC5's.   I actually had Redding get together the parts and I believe it was about $250 in parts from Schoeps in addition to the KC5's - to make a a KCY and AKI.

This is using the Schoeps boards, WIMA Caps, the junction boxes, Schoeps provided Binders, and 4 conductor Schoeps cabling.

Wow... that's actually a pretty good idea! I didn't even know that Schoeps will sell the junction boxes and wonder why Vark uses their own.

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Re: Schoeps KCY cable
« Reply #65 on: October 06, 2011, 09:13:39 PM »
Building a KCY from a pair if KC5's is very straight forward - I almost made a set but sold my extra set of KC5's.   I actually had Redding get together the parts and I believe it was about $250 in parts from Schoeps in addition to the KC5's - to make a a KCY and AKI.

This is using the Schoeps boards, WIMA Caps, the junction boxes, Schoeps provided Binders, and 4 conductor Schoeps cabling.

Wow... that's actually a pretty good idea! I didn't even know that Schoeps will sell the junction boxes and wonder why Vark uses their own.

yeah, I thought about the KC5 route myself and just splitting them and doing a 2xLemo>binder adaptor cable to do the split. The unknown to me is the same as mentioned earlier, what's the box do if other then split the cables out into 2 separate entities.

As for why Vark uses their own, maybe it's a cost savings.
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Offline H₂O

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Re: Schoeps KCY cable
« Reply #66 on: October 06, 2011, 10:08:14 PM »
Box has a single WIMA capacitor (6.8pF/63V or something like that - probably between GND and +60V) in it on a Schoeps PCB and strain relief for the cables.   I have no idea on the AKI - haven't opened mine yet. 

I do not know the schematics of the KCY Colette's though - but I would think it's the same as the KC5's.  I don't know the AKI's either but it may lack the attenuation circuits (or at least they may be different) found in the KC5's as when you run KCY/AKI it's +5db versus KC5 or no actives.
« Last Edit: October 07, 2011, 08:16:13 PM by H²O »
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Offline F.O.Bean

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Re: Schoeps KCY cable
« Reply #67 on: October 08, 2011, 05:15:02 PM »
Yes, but arent there electronics in the cabling that make them "actives" ??? Meaning you cant use just any old cable?
Schoeps MK 4V & MK 41V ->
Schoeps 250|0 KCY's (x2) ->
Naiant +60v|Low Noise PFA's (x2) ->
DarkTrain Right Angle Stubby XLR's (x3) ->
Sound Devices MixPre-6 & MixPre-3

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Offline hi and lo

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Re: Schoeps KCY cable
« Reply #68 on: October 08, 2011, 06:00:44 PM »
The "active" electronics are contained within the MK Connector housing. Their purpose is to convert the impedance of the signal coming out of the microphone capsule. With this impedance converting circuitry, the signal that high impedance audio signal could travel w/o degradation is measured in mere feet. By converting it to low impedance, it can travel hundreds of feet without issue.

The cable itself is just your standard 4-conductor shielded cable.

Offline it-goes-to-eleven

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Re: Schoeps KCY cable
« Reply #69 on: October 08, 2011, 08:04:24 PM »
The cable itself is just your standard 4-conductor shielded cable.

The schoeps active cable is *extremely* well shielded.   It is custom made for this specific application, which of course is unbalanced.  It is actually 3 conductor.

1804 has below average shield coverage.

So... nope, definitely not your standard 4-conductor shielded cable.

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Re: Schoeps KCY cable
« Reply #70 on: October 14, 2011, 08:19:33 PM »
I just completed my customer cable collection:

Hacked KC5 cables, KCY and KCY to KC5 cable


ok so ya'll wanted to see the inside of the Vark junction box and it doesn't look like it has a pcb or capacitor. it is just wires soldered to wires.

Inside KCY cable junction box


Inside KCY to KC5 adapter cable junction box





Offline yug du nord

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Re: Schoeps KCY cable
« Reply #71 on: October 14, 2011, 08:41:32 PM »
Nice!  Did Vark make all of those?

So what's goin on...  from left > right??
Is that two pairs of hacked KC5's?  One with a binder, one with mini xlr's?
Can you run both pairs of those cables > bodies?

My Vark KCY does not have any sort of board or anything either...  straight up splitter.
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Offline jbell

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Re: Schoeps KCY cable
« Reply #72 on: October 14, 2011, 08:54:25 PM »
Should the KCY junction have any electronics in it??  ???
Mics: DPA ST4011ER & 4018ER
Preamps: DPA MMA 6000 | Audioroot Femto
Recorders: Sound Devices Mixpre-10 II | Sony PCM A10

-20        -12         -6        TDS   (32/48)     
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|Record|  Runtime: 4:19.99  {|||] 75%

Offline jbell

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Re: Schoeps KCY cable
« Reply #73 on: October 14, 2011, 09:09:38 PM »
Thanks Jon!  Anyone have a pic of the inside of the schoeps KCY junction??

Should the KCY junction have any electronics in it??  ???

I wouldn't expect it to, although it could.  The FET has to be much closer to the capsule so there is no reason to put components in the junction box.
Mics: DPA ST4011ER & 4018ER
Preamps: DPA MMA 6000 | Audioroot Femto
Recorders: Sound Devices Mixpre-10 II | Sony PCM A10

-20        -12         -6        TDS   (32/48)     
]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]][}   
]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]][} 
__________________________
|Record|  Runtime: 4:19.99  {|||] 75%

Offline hi and lo

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Re: Schoeps KCY cable
« Reply #74 on: October 14, 2011, 09:43:58 PM »
I've seen the inside of a Schoeps junction box for a KIY 250/0 I cable which is used with the CMBI's. It had PCB and was extremely clean and well thought out. Their method for strain relief on the cable insulation is grooves in the plastic that apply the perfect amount of pressure.

 

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