Orion 12500.1DSSPLX

[caraudioguy2100]

I don’t see anything that would cause ty r 22 ohms between the rca shields and main ground terminal .

I have a Orion 5 k amp here and it measures exactly the same 22 ohms from main ground to rca shields

 

[Perry Babin]

22 ohms doesn't seem right.

Does the amp have 2 47 ohm resistors near the RCA jacks?

 

[caraudioguy2100]

I don’t see any 47ohm resistors here is 1 pic of the components near the rca jacks

 

[Perry Babin]

Did you look under the power supply driver board for the resistor between the grounds?

 

[caraudioguy2100]

yes but don’t really see anything and tested all components and they test good

 

[Perry Babin]

Is R473 on the corner of the board the 22 ohms you're reading RCA to primary ground?

 

[caraudioguy2100]

From R473 to the rca shields I bet tradings in the mega ohms and from R473 to the main ground also get readings in the mega ohms .

I will lift one side of that resistor and see if it changes anything

Lifting the resistor does nothing still 22 ohms from rca shields to ground terminal

 

[caraudioguy2100]

The only resistor I see that might connect the 2 is the large 22 ohm 5 watt resistor

 

[caraudioguy2100]

There is a 22 ohm resistor that connects primary ground to secondary ground .

It’s a 22 ohm 5 watt resistor .

So wondering if you have any suggestions on how to cure the noise that back feeds into other amps in the system

 

[Perry Babin]

Increase the value of that resistor.

One problem is could create is that a regulated power supply with an isolated secondary (except for this resistor) and no optical coupling, the regulation may become less stable, especially with no grounded signal source plugged in. It may or may not be a problem in this amp.

 

[caraudioguy2100]

What would you increase the value to ?

1k or 220 ohm ect ?

 

[Perry Babin]

1k is very common. I'd try that first to see if there were any problems.