jea48

Responses from jea48

AR Classic 60 Bias Confusion
@perryg I hope you have at least a pair of something like these.     You’ll need something insulated to connect the DMM two probe leads to the two bias points on the circuit board for channel of the amp. You’ll need the meter around the... 
Hum in Speakers with New Dedicated 20 amp Circuit
  jea48 said: One equipment grounding conductor. (Note: If a steel conduit is used between the main panel and sub panel that meets NEC for use as an equipment grounding conductor.) erik_squires said: That's a surprise! We can't do this ... 
Hum in Speakers with New Dedicated 20 amp Circuit
EDIT: Jea48 said: I assume the sub panel was install because the main panel was full. Three 120V circuits were moved from the main panel to the new sub panel. I assume, hopefully, to free up two breaker spaces in the main panel for a 2 pole bre... 
Hum in Speakers with New Dedicated 20 amp Circuit
@mjjw, IMG_3400.JPG Sub Panel You say its been that way for 10 years. Hard to believe it was installed and wired a qualified licensed electrician. I don’t think it was done by an licensed electrician. How far is the sub panel from the main ele... 
Dedicated power circuits
kingrex 74 posts 02-26-2023 at 02:13pm Southwire Armorlite 125-ft 10/2 Solid Aluminum MC Cable You sure you want to recommend this cable. Think of all the issue you are creating. I would never use it. Its what I removed from F... 
Fremer's Single-leg panel is absolute tweak bs
@kingrex said: I have measured with a meter a reduction in noise in a panel when its grounded properly. I have eliminated certain noise. I have no doubt in what you say. But show me the circuit. Here is the circuit as I see it. The EGC, IF us... 
Dedicated power circuits
How many wires are in 10/2 and what are they. @kingrex I assume you mean in MC. 3 insulated conductors. 2 Line conductors, 1 green insulated EGC. You should know that🤔...  
Dedicated power circuits
Think of all the issue you are creating.  Like what?   Are you sure, maybe, you didn't remove AC AL armored cable?  
Fremer's Single-leg panel is absolute tweak bs
@kingrex Rex post + 1 Just to clarify a few points. 1) you said: Mikes stand alone structure only has sleeping and bathing so its not a residence. As such he does not need AFCI. There is no kitchen in the listening room so he does not need G... 
Dedicated power circuits
Make sure you tell the electrician you want 10/2 with ground SOLID copper conductor aluminum armored MC cable. "MC", NOT "AC" armored cabled. Make sure he repeats to you it will be MC cable.   Be careful what you are buying now days when it com... 
Dedicated power circuits
So where do I find this twisted mc cable? All i see is untwisted or straight. It's not straight, trust me. Example of what to buy: I highly recommend you hire an electrician to install MC cable. . .            
Fremer's Single-leg panel is absolute tweak bs
i use an Equi=tech 10WQ Wall Panel System which does use balanced power. my electrical contractor was fine installing it since it was in a separate building, for a dedicated room "only" resembling a commercial installation. i called it my ’studio... 
Fremer's Single-leg panel is absolute tweak bs
As for Fremer’s audio room power system: A lot of audiophiles use a sub panel to feed their audio equipment. I would guess in most cases the sub panel is wired 120/240V. I would also guess that most audiophiles, not all, feed all there equipment,... 
Fremer's Single-leg panel is absolute tweak bs
For a residential dwelling unit in the US a hard wired 60/120V balanced power system is not NEC or AHJ (AHJ, in most areas in the US) code compliant. If a person can get a electrical contractor/electrician to install and wire one into the electric... 
AR Classic 60 Bias Confusion
@perryg, I found this video for the ARC Classic 60. For the bias adjustment go to time marker 12:20. Note, when the tech first starts taking about where he has the meter probes attached on the left side of the amp he say points 2 & 4. I p...