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fault151  
#1 Posted : 16 years ago
fault151

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Hi, is there a wiring diagram available that i can look at? I need to hook up my balanced jtree kit with my balanced inputs and un balanced inputs using an otto.

Thank you.
Brian Donegan  
#2 Posted : 16 years ago
Brian Donegan

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Here is a quick diagram for wiring up the signals into and out of the relay boards for balanced use:

Brian Donegan attached the following image(s):
Balanced_JT_Wiring.JPG (37kb) downloaded 1,003 time(s).

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oneplustwo  
#3 Posted : 16 years ago
oneplustwo

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Is it safe to assume the jumper is there for both boards in balanced use?
Brian Donegan  
#4 Posted : 16 years ago
Brian Donegan

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Yes. The jumper causes the ground to be shared by both the + and - sides, so that both signals are referenced to the same ground. It is equivalent to using a jumper wire between the IN GND positions in the terminal blocks.

For single-ended use, you can leave the jumper out for separate left-right grounds, or use it if you have (or to create*) a shared ground.



*Creating a shared ground at the JT is not recommended unless you know what you are doing to avoid possible ground loops.

biellis  
#5 Posted : 16 years ago
biellis

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Brian,
Your diagram above show the + signal going to the gnd and gnd going to input of one side of board is that correct?

Bill
Russ White  
#6 Posted : 16 years ago
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NO It is not correct. +IN(and out) and GND are swapped. Good catch. :)

Edited by user 16 years ago  | Reason: Not specified

zonneveld  
#7 Posted : 16 years ago
zonneveld

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fault151 wrote:
Hi, is there a wiring diagram available that i can look at? I need to hook up my balanced jtree kit with my balanced inputs and un balanced inputs using an otto.

Thank you.



hope this is helpfull to you

UserPostedImage
oneplustwo  
#8 Posted : 16 years ago
oneplustwo

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nevermind... question bad.

Edited by user 16 years ago  | Reason: Not specified

fault151  
#9 Posted : 16 years ago
fault151

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When hooking up the wires to the joshua tree output posts in balanced mode, is it best to pair the + from both amplifier boards to the same jtree board and both the - amplifier boards to the other jtree board? Or does it not matter? Does that make sense?

For example:

b22 amplifier Right+ board connects to jtree board 1
b22 amplifier Left + board connects to jtree board 1

b22 amplifier Right - board connects to jtree board 2
b22 amplifier Left - board connects to jtree board 2


Thanks
Russ White  
#10 Posted : 16 years ago
Russ White

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Use one JT relay board per channel. Both + and -.

You want to keep those signals close together.

Cheers!
Russ

oneplustwo  
#11 Posted : 15 years ago
oneplustwo

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are you supposed to tie the boards' grounds together?

Also, I have 30V coming in from a sigma 22 PSU. Should I put a zener diode or maybe just a resistor in line with the wiring to pull the voltage down a bit? It works with the 30V, but it gets hot quickly and I don't want to burn out the onboard rectifier.

Edited by user 15 years ago  | Reason: Not specified

Brian Donegan  
#12 Posted : 15 years ago
Brian Donegan

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I would chassis-mount the vreg if possible, or at the very least use a larger HS for it with 30V in.
oneplustwo  
#13 Posted : 15 years ago
oneplustwo

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I'm just going to go ahead and add a trafo. Also, for those trouble shooting their JTA's, I had a problem with one of my boards (I'm running a 2 board balanced setup) that turned out being fixed when I pushed the ribbon cable harder into the snap connector.
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