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One more Folcrom Question.
Old 9th August 2005
  #1
Gear Guru
 
Kenny Gioia's Avatar
 

One more Folcrom Question.

For complicated reasons, I'm only using 14 channels of the Folcrom right now.

Is it OK if I use Channels 3-16 instead of 1-14 and just turn off Channels 1 & 2.

I don't really know how it's wired and if it really matters.

Thanks.
Old 9th August 2005
  #2
Put Scotch Tape over the unused patch holes or electricity will escape and get out into the room and maybe electrocute everyone.
Old 9th August 2005
  #3
Gear Guru
 
Kenny Gioia's Avatar
 

Quote:
Originally Posted by Jules
Put Scotch Tape over the unused patch holes or electricity will escape and get out into the room and maybe electrocute everyone.
Isn't it passive?

And eveyone says that you brits don't have a sense of humor!!

Actually that's usually me saying that.

I'm actually not sure if it matters. There are no stupid questions?

Although, now that I think about it ..........
Old 9th August 2005
  #4
member no 666
 
Fletcher's Avatar
They have a sense of humor, it's just usually rather dry... more based on subtle irony and silliness than the more brash and brazen American humor. In this case however, Jules is correct [on a technical level] about covering the first couple of unused holes on the patchbay.

While the unit is passive there is some airborne radiated high voltage transfer that occurs when the first couple of channels remain unassigned in a passive summing application. The phenomenon was first discussed in a white paper by David R. Berchard [AES, NAB] in 1947. It has been known as the Berchard Effect ever since. While rare, there have been several serious injuries and I believe one death that has resulted from the Berchard Effect.

There is a flip side in that if you do cover the holes on your jackfield for the unused earlier channels, and don't assign those channels to the mix buss, you will find a .018db increase in signal to noise performance per two channels not assigned. This benefit is also stated in the Berchard paper.

Peace.
Old 9th August 2005
  #5
Lives for gear
 
Ziggy!!'s Avatar
 

heh heh heh heh
Old 9th August 2005
  #6
Gear Addict
 

****
Old 9th August 2005
  #7
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ulysses's Avatar
All the channels are identical, it doesn't matter which ones you use. The one thing that is important is that you shut off (un-assign) any channels that don't have something plugged into them. By "something" I mean an audio source, not just a patchbay. The passive summing network depends on a predictably low-impedance source on all channels, such as a line-level output on some other piece of gear. When you unassign a Folcrom channel, the source is disconnected and this low impedance is provided internally.
Old 10th August 2005
  #8
Gear Guru
 
Kenny Gioia's Avatar
 

A real answer.

How refreshing. Thanks.
Old 8th September 2005
  #9
11413
Guest
Quote:
Originally Posted by Jules
Put Scotch Tape over the unused patch holes or electricity will escape and get out into the room and maybe electrocute everyone.
forget Slippy.. Jules wins.


Old 8th September 2005
  #10
Lives for gear
 

Quote:
Originally Posted by Jules
Put Scotch Tape over the unused patch holes or electricity will escape and get out into the room and maybe electrocute everyone.
That was funny!!!!!!!!! ****, I just spit coffee through my nose!
Old 8th September 2005
  #11
Lives for gear
 
Bishbashbosh's Avatar
 

Maybe Stadium Rocker can chip in here with his thoughts...... heh

Man I miss that thread...
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