700 RCA Grounding

laatsch55

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Yes Jer, when that output went I had to replace the relay for that channel..
Cheap compared to the 2" drivers in the midhorns..
 
jbeckva

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LOL so in full transparency.. Frankey recently suffered the same fate with a preamp I worked on (ugh). Thought I had it with replacing the relay but last time I had time to check it out, something else started to fizzle. Hadn't had a chance since then.. but at least I didn't burn holes in my CV's
 
WOPL Sniffer

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jbeckva said:
Perry I don't do that.. when did it become the standard? I'm thinking when the mono rev G came out?

I run all to the cap buss bar, except the one single ground to that left hand tie point. Must have been a revision since me last build, which has been a good while..

We need Sir Joe here to clear some cornfusing up..
Click to expand...
Done it for the last several years. it is the same point as the copper bus bar. All my grounds go to it adding one from there to the bus bar, and Joe said he got better numbers adding the 2 from the right back plane to the star ground instead. Still have the 2 from the left back plane going to the bus bar
 
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I consider the tie point in the center of the left back plane THE star ground with all grounds emanating there. The cap bus bar is grounded to there and really has no other connection to ground. It IS grounded to there through the back plane.
 
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laatsch55

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jbeckva said:
LOL so in full transparency.. Frankey recently suffered the same fate with a preamp I worked on (ugh). Thought I had it with replacing the relay but last time I had time to check it out, something else started to fizzle. Hadn't had a chance since then.. but at least I didn't burn holes in my CV's
Click to expand...
Was the relay "sticky" and sound like shit through that channel?
 
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Besides, soldering 8 connections to that copper piece looks like crap and is a PITA. It looks better all attached to the one chassis connection. I get awesome numbers too.
 
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WOPL Sniffer said:
Besides, soldering 8 connections to that copper piece looks like crap and is a PITA. It looks better all attached to the one chassis connection. I get awesome numbers too.
Click to expand...
I just lug em up on either end of the buss bar. If memory serves, the one on the top gets the two down to the left backplane, the bottom gets the two speaker grounds, and that left the single smaller awg for the chassis ground. DCP ground got twisted along with the B+ since I'd move the DCP rectifiers to the left side and bridge one of them with a jumper on the DCP. Good numbers as well IIRC (eh Lee? didn't you test one of them from me?)

Yeah that was before the mono config where you'd wire up two more to the right instead of bridging them together. One of these days I might get another 700 build, but I'm certainly not counting on it due to the short supply nowadays.
 
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jbeckva said:
I just lug em up on either end of the buss bar. If memory serves, the one on the top gets the two down to the left backplane, the bottom gets the two speaker grounds, and that left the single smaller awg for the chassis ground. DCP ground got twisted along with the B+ since I'd move the DCP rectifiers to the left side and bridge one of them with a jumper on the DCP. Good numbers as well IIRC (eh Lee? didn't you test one of them from me?)

Yeah that was before the mono config where you'd wire up two more to the right instead of bridging them together. One of these days I might get another 700 build, but I'm certainly not counting on it due to the short supply nowadays.
Click to expand...

Electrically they are the same point.
 
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and with the addition of the GND1 and GND2 from the right back plane, to the left back plane center post ground point? Joe said he got "A little more" from it.
 
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We all have slightly different ways of doing a build. In the end though, ground just hits the chassis once.
 
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Wayne said:
In above paragraph number five it should of read; l feel safer having all my equipment grounded to earth than floating where shocks can occur.
Click to expand...
Update:: Like I said earlier that I'm using three prong plug on my PL and have no residual hum on the output of my PL amp.
My preamp,turntable,and CD all have the standard two type with one probs being larger for polarity.
Also installed dcp circuit from Don.
All done with this project now.
It has great sounds driver a pair of 80's towers I rebuilt.
Thanks for all the help you guys.
 
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