DCP going south??

yea the DCP took everything I threw at it at least with the generator different story with music though but the DCP is doing it's job something I think is still not right with my amp other than resistors but I will swap them out and see thanks Joe for the offer I really appreciate it... after I swap out the resistors I'll bring back out to the shop to hook to my big speakers to see what happens... mean while I got all the parts here for my 939 so I'll go back on that and set the wopl aside for now
 
Last edited:
I've been following, you'll be good to go. That's the current limiting circuit. Lee fingered it out (and Joe). Gotta have faith. After all, this stuff ain't Made in Cina ya know......
 
Actually Jer's been sniffin this problem out for the last month, all I did was confirm on one of mine...
 
That's a Joe question, but other than the 4 resistors I'd guess not...
 
I'm not even sure I'd ask Dr. Noah Drake that...
 
WOPL Sniffer said:
I've been following, you'll be good to go. That's the current limiting circuit. Lee fingered it out (and Joe). Gotta have faith. After all, this stuff ain't Made in Cina ya know......
Click to expand...

I hope so... the thing that bothers me about this is when I first finished the build I did not have a preamp all I had was my 939 which I pulled the jumpers out to bypass the amp in it to use it as a preamp, I ran this for several weeks and never had a problem, then I got the C-1 and ran it stock for a couple weeks again no problem, then I did mod upgrade to C-1, there are 3 phases of the upgrade.. 1st phase is recapping, I did this and ran it for a week or so no problem to this point the DCP never tripped, the second phase of the C-1 upgrade is replacing opamps which I did and this is where the problem began when I hooked it up to the amp and turned it on I heard some very bad sounds coming out of the speakers I shut everything down right away.. everything looked ok on the dim bulb test with the C-1 after I put the opamps in but something was bad wrong

I pulled the C-1 out of the system and reconnected the wopl back to the 939 for my preamp and in a short time the DCP tripped, first time it ever tripped it did it many times from there. Then my wife came home with a PL3000 preamp I connected it up to the wopl and it to was tripping the DCP, I took the C-1 to a carver tech and he found 2 of the opamps I put in were bad and blew 2 transistors in the C-1, when I got the C-1 back I connected it back to the wopl and still the DCP would trip now and then

My bottom line thoughts are the wopl went from never a problem DCP never tripped then literally 1 moment later problems with the DCP tripping frequently only after connecting the faulty C-1, I did not change the way I listened to my music or change anything else if those opamps blew transistors in the C-1 then I question if it could have damaged any transistors in the wopl, these resistors could be a contributing factor here but the way this went down makes me think there may be something else there
 
And what happened when you isolated the SOA circuit?
 
laatsch55 said:
And what happened when you isolated the SOA circuit?
Click to expand...

Lee here is a copy past from page 3 this thread I posted last night of results after I lifted D9 both channels


<b data-find="_10" style="color: rgb(62, 62, 62); line-height: 10px; background-color: rgb(105, 150, 211);">
Hey Lee D9 L & R disconnected.....

Right channel goes to 45.3 VAC before it starts to clip
Left channel goes to 45.2 VAC before it starts to clip

DCP never tripped on either side​





</b>
 
What I was getting at was everything is fine but the SOA circuit. We've proved that. And with the resistor change we'll prove something else, and if the resistors don't do it we'll pull and check SOA transisyors, and at the time we do that we'll check D9,D10, and if that dint do it we'll pull and check some caps and if that don't do it we'll pull some more resistors and if that don't do it........I'm out of ideas after that.....
 
laatsch55 said:
What I was getting at was everything is fine but the SOA circuit. We've proved that. And with the resistor change we'll prove something else, and if the resistors don't do it we'll pull and check SOA transisyors, and at the time we do that we'll check D9,D10, and if that dint do it we'll pull and check some caps and if that don't do it we'll pull some more resistors and if that don't do it........I'm out of ideas after that.....
Click to expand...

lol ok Lee we got to keep your record 100% :blob5:
 
You must log in or register to reply here.
Back
Top