PL 700 Pro Build

Met
George S. said:
So look at all that room. Going to get some longer standoffs and space that control board away from the back planes a little more like Glen does his.
Going to lay a towel over the transformer and fins, lay the intermediate plate on it, and start wiring it.
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Meters alot of that room.
 
George S. said:
Calling the 700 Pro build finished after getting the longer standoffs installed, and Joe's updates done. Got the RCA ground tabs soldered to the copper plate. Thanks y'all. Later.
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Thank you for sharing this build it helps a lot on questions I had now ive seen wopl I can picture what everyone is talking about .
I'm gonna do it just gonna have to do some part time work a bit .
 
George S. said:
Got the RCA ground tabs soldered to the copper plate. Thanks y'all. Later.
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George, as a possible alternative, the RCA Grounds on the Copper Plate are not necessary. The Input wire shields receive their Ground potential from the Control Board on Positions 2L and 2R. There is much more noise around the Main Power Supply Capacitors that you do not need. Additionally, you want the Input Wire shields isolated from the chassis, when you connect these shields to the Copper Plate (STAR Ground) there is one wire that is connected to the chassis. This effectively connects your Input Wire Shields to the Chassis and creates a Ground Loop back through the Control Board.

I have wired every WOPL upgrade this way and the results are good. By the way, your wiring looks very neat.
 
Mark L., so, ditch the RCA ground tabs and make the coax I use be a single ended ground at the control board 2R and 2L?
And get the RCA grounds where?
Originally I wired the RCA's full floating and isolated from each other with fiber washers on both sides.
Joe said the RCA grounds needed to be tied together, so I reinstalled the RCA copper plate. The entire RCA assembly with copper plate floats above chassis ground.
Perhaps I misunderstood what Joe was saying(wouldn't be the first time). :)
 
mlucitt said:
George, as a possible alternative, the RCA Grounds on the Copper Plate are not necessary. The Input wire shields receive their Ground potential from the Control Board on Positions 2L and 2R. There is much more noise around the Main Power Supply Capacitors that you do not need. Additionally, you want the Input Wire shields isolated from the chassis, when you connect these shields to the Copper Plate (STAR Ground) there is one wire that is connected to the chassis. This effectively connects your Input Wire Shields to the Chassis and creates a Ground Loop back through the Control Board.

I have wired every WOPL upgrade this way and the results are good. By the way, your wiring looks very neat.
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As Sniff would say HUH??

I tried reading your statement above several times and not sure I understand your point.

The intent of the copper plate is to ensure a robust connection between the RCA jack grounds back to the source component. This eliminates potential ground shifts between the two inputs due to noise on interface cables acting as potential antennas.

You want the best ground connection between each RCA outer shell as soon as the input enter the housing and both isolated from the amp chassis ground.
 
Hexis22 said:
I tried reading your statement above several times and not sure I understand your point.
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I did not say anything about the copper plate where the RCA Inputs come into the amp. I was speaking of the Copper Plate that goes between the Power Supply Capacitors.
George had the RCA Input Jacks wired properly. I was pointing out that he did not need to Ground the Input Jack Copper Plate to the Copper Plate (Star Ground) between the Capacitors.

I can see how the first line of my statement can be misleading. There are two Copper Plates in a PL amplifier. I should have written it this way:
"George, as a possible alternative, the additional RCA Ground wire you connected to the Buss Bar (STAR Ground) between the Power Supply Capacitors is not necessary. The Input wire shields receive their Ground potential from the Control Board on Positions 2L and 2R. There is much more noise around the Main Power Supply Capacitors that you do not need. Additionally, you want the Input Wire shields isolated from the chassis, when you connect these shields to the Buss Bar (STAR Ground) there is one wire that is connected to the chassis. This effectively connects your Input Wire Shields to the Chassis and creates a Ground Loop back through the Control Board."

Sorry for the confusion, it was late.
 
mlucitt said:
I did not say anything about the copper plate where the RCA Inputs come into the amp. I was speaking of the Copper Plate that goes between the Power Supply Capacitors.
George had the RCA Input Jacks wired properly. I was pointing out that he did not need to Ground the Input Jack Copper Plate to the Copper Plate (Star Ground) between the Capacitors.
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That makes sense.

Sorry, when I read copper plate in your description I automatically thought of the one between RCA inputs. I typically replace the copper bus bar with Joe’s aluminum assembly and completely overlooked the original copper bus bar.

Thanks for clarifying.
 
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