- Joined
- Jan 14, 2011
- Messages
- 74,825
- Location
- Gillette, Wyo.
- Tagline
- Halfbiass...Electron Herder and Backass Woof
DCP going south??
- Thread starter roccus
- Start date
Amp was working fine so was the preamp up until I put those opamps in the preamp so this is a one change thing at a time that raised hell with everything to me looks like something in the right channel is not right hope the problem is not a backplane will be a bitch to have to remove those.... will see what the pros says with my findings from today
- Joined
- Jan 14, 2011
- Messages
- 74,825
- Location
- Gillette, Wyo.
- Tagline
- Halfbiass...Electron Herder and Backass Woof
- Joined
- Jan 14, 2011
- Messages
- 74,825
- Location
- Gillette, Wyo.
- Tagline
- Halfbiass...Electron Herder and Backass Woof
- Joined
- Jan 14, 2011
- Messages
- 74,825
- Location
- Gillette, Wyo.
- Tagline
- Halfbiass...Electron Herder and Backass Woof
lol Perry you must have skipped some posts..... My amp is the wopl 400 it was running great I also have a Carver c-1 preamp there is a thing called the BillD mod that improves the c-1 preamp performance the mod is 2 stages 1st stage is swapping out caps for new ones I did this and all was well the c-1 carver preamp worked great with the wapol 400 ran it the c-1 with the 400 stage 1 mod for near a week waiting for parts for stage 2 mod..... I decided to do stage 2 mod on the caver c-1 preamp which involves swapping out the old 4136 opamps for newer more modern 2134 opamps the 4136 opamps are a quad pin mount amps the newer 2134 are a dual surface mount amp so you need to get adapters called browndogs the adapters on top are made to solder 2- 2134 dual opamps on it to make a quad amp the bottom of the adapter has pins to mount to a through hole pc board or plug into and IC socket
Ya still with me???
After I installed the new opamps in the C-1 preamp I powered up slowly with dim bulb all looked ok so I connected the C-1 to my wople... when I connected the C-1 to my wopl all I got was pops hums scratches and howling. I shut it down and knew there was a serious problem. I got ahold of a Carver tech to look at the Carver C-1 preamp. he found 3 or the new 2134 opamps were bad and this is what he reported to me....
Quote from Carver tech on the C-1
"I am done with your C-1. All is good now. I know what caused this big failure. Two of the new OpAmps on the Browndog's are bad. One of them has enormous gain. Both of them oscillate. This would explain what hosed your amp as well as the muting JFET's in the C-1."
While he had my C-1 preamp I found I also now have a problem with my wopl 400 and I told him I had a feeling what ever happened to the Carver C-1 preamp damged my wopl 400 amp when he says "hosed your amp" he is saying this is what most likely damaged my wopl 400
Hope this clears up any confusion here I have 2 units that went down at same time seems the Carver C-1 damaged my wopl 400 so I have been dealing with 2 repairs at same time looks like the Carver tech has the Carver C-1 set but now I need to fix the wopl 400
Ya still with me???
After I installed the new opamps in the C-1 preamp I powered up slowly with dim bulb all looked ok so I connected the C-1 to my wople... when I connected the C-1 to my wopl all I got was pops hums scratches and howling. I shut it down and knew there was a serious problem. I got ahold of a Carver tech to look at the Carver C-1 preamp. he found 3 or the new 2134 opamps were bad and this is what he reported to me....
Quote from Carver tech on the C-1
"I am done with your C-1. All is good now. I know what caused this big failure. Two of the new OpAmps on the Browndog's are bad. One of them has enormous gain. Both of them oscillate. This would explain what hosed your amp as well as the muting JFET's in the C-1."
While he had my C-1 preamp I found I also now have a problem with my wopl 400 and I told him I had a feeling what ever happened to the Carver C-1 preamp damged my wopl 400 amp when he says "hosed your amp" he is saying this is what most likely damaged my wopl 400
Hope this clears up any confusion here I have 2 units that went down at same time seems the Carver C-1 damaged my wopl 400 so I have been dealing with 2 repairs at same time looks like the Carver tech has the Carver C-1 set but now I need to fix the wopl 400
"Which way did he go George".................
I think I got it now but look what you did to me............. That's why I wear my sunglasses
View attachment 26399
I think I got it now but look what you did to me............. That's why I wear my sunglasses
View attachment 26399