We got some great additions to our parts supply !!!!!!!

WOPL Sniffer

WOPL Sniffer

Veteran and General Yakker
Joined
Aug 10, 2015
Messages
11,886
Location
Minnie-Soda
Tagline
Screw it
Great news for the Carver Preamp builders. The Aluminum plates we have been using for the C-1/C-11 in addition to the Bill D Mods have been pretty much sold and the supply has dried up. I bought the last 3 from the Carver Site and used them up quick. I was bitching about the lack of RCA plates and everybody knows that the plastic crap that the Bean Counters forced us to deal with SUCKED and our resident Engineer Extraordinaire from White Oak Audio Design asked me if there was something HE could do to help deal with these RCA Plates. Holy Shit, A dream come true and I said HELL YEAH, and explained the issue and showed him the doc's/drawings and he had the drawing pretty much complete in a day or two. So Joe tasked me to do some caliper work to get him some dimensions and get the numbers to make sense (which they didn't) and Joe threatend to come out here to Mn and kick my ass if I didn't get a little more accurate and use the mm setting like the rest of the dorks do. Next thing ya know, he'll make me buy a Pocket Protector and drink Decaf............ Anyway, joe sent me the Rev A Proto board to install on a C-1 I am doing a bunch of mods to and flip it and then the C-11 will be next in line. So, I'm taking a bunch of pics and show the steps I take to install the RCA Plate so check this first few pics, Joe can do some sweet design work as most of us all know. I want to get this C-1 completed soon and then it will find it's way to the Sale Section, unless somebody is in need. I got a C-1, a C-11, and 2 4000t's almost all completed. Oh, that reminds me, Joe will be working on the RCA Plate for the C4000/4000T too. I chopped my last aluminum plate in two and installed it in a 4000T and it fit nice and looked good but nothing like the WO Plate.



IMG_20250915_014541709_HDR.jpgIMG_20250915_014509961_HDR.jpg
 
I have no idea as to why my pics are showing up upside down. It started doing it a couple months ago. Friggin Chinee computers
 
WOPL Sniffer said:
Great news for the Carver Preamp builders. The Aluminum plates we have been using for the C-1/C-11 in addition to the Bill D Mods have been pretty much sold and the supply has dried up. I bought the last 3 from the Carver Site and used them up quick. I was bitching about the lack of RCA plates and everybody knows that the plastic crap that the Bean Counters forced us to deal with SUCKED and our resident Engineer Extraordinaire from White Oak Audio Design asked me if there was something HE could do to help deal with these RCA Plates. Holy Shit, A dream come true and I said HELL YEAH, and explained the issue and showed him the doc's/drawings and he had the drawing pretty much complete in a day or two. So Joe tasked me to do some caliper work to get him some dimensions and get the numbers to make sense (which they didn't) and Joe threatend to come out here to Mn and kick my ass if I didn't get a little more accurate and use the mm setting like the rest of the dorks do. Next thing ya know, he'll make me buy a Pocket Protector and drink Decaf............ Anyway, joe sent me the Rev A Proto board to install on a C-1 I am doing a bunch of mods to and flip it and then the C-11 will be next in line. So, I'm taking a bunch of pics and show the steps I take to install the RCA Plate so check this first few pics, Joe can do some sweet design work as most of us all know. I want to get this C-1 completed soon and then it will find it's way to the Sale Section, unless somebody is in need. I got a C-1, a C-11, and 2 4000t's almost all completed. Oh, that reminds me, Joe will be working on the RCA Plate for the C4000/4000T too. I chopped my last aluminum plate in two and installed it in a 4000T and it fit nice and looked good but nothing like the WO Plate.



View attachment 87620View attachment 87621
Click to expand...
Looks great Perry !
 
If you haven't had a C-1 open, here ya go. If you can see, there is 2 shit-tons of solder AND flux left on these boards from the 80's. Don't put too much solder on them when redoing. And, get the flux outta here...... Notice by the RCA jacks.......

I have done the Bill D Recap, installed all new Opamps and sockets with a bunch of work left to do.





IMG_20250915_015937844_HDR.jpgIMG_20250915_015912524_HDR.jpg
 
When stripping the RCA's out of the preamp, just cut them out with a good pair of cutters. We don't want to damage anything from heating those pads up. Plus, they are junk. I was taught Non-Destructive Removal of components in school but it don't count when Grandma and great-grandma used more solder like they were putting on Denture Cream.





IMG_20250915_050549948_HDR.jpgIMG_20250915_050632838_HDR.jpg
 
After removal of the plastic RCA's here is what it will look like. A pair of RCA's will connect to the cleaned pads and they are set up in a triangle. The grounds are set up in front of the L/R Pads. Look at the farthest pad on the left. That's the right channel (blue wire marked R) and the left channel will be the Yellow wire next to it.


IMG_20250915_053346849_HDR.jpgIMG_20250915_051910651_HDR.jpg4370ace7-9bac-4071-b6c6-efa3611fc23e.jpgIMG_20250916_043911625_HDR.jpgIMG_20250916_043911625_HDR.jpg
 
The downside of the aluminum plate is that it forces a tie between the DC ground of the preamp and the chassis ground of the preamp.

Carver specifically designed one and only one connection point between these 2 ground systems. Using the aluminum plate defeats this scheme. The WO C-1 RCA plate separates the DC ground from the chassis ground. 13 connection pads are provided labeled WP1 to WP13 for tie in of the DC ground on the C-1 RCA plate to the respective grounds on the preamp board. Likely you will only need 4-5 connection points, not all 13, but you have options.
 
I was wondering… plastic (well, CHEAP plastic) prevents multiple ground paths but can suck.

Some designs are very sensitive to this and can make their displeasure known via hum.
 
J!m said:
I was wondering… plastic (well, CHEAP plastic) prevents multiple ground paths but can suck.

Some designs are very sensitive to this and can make their displeasure known via hum.
Click to expand...

Jim, my preamps never Hum because they know the words..... I had a Bill D modded Preamp that hummed but it was because the Brown Dog Adaptor and I have never used them since. Matter of fact I have 6 of those expensive BD adaptors which adapt the OPA2134UA where the RC4136 odd pinned opamps go but the newer RC4136N from TI are way better than the earlier 40 year old opamps (less noise) but depending on which tech at Cimmeron Technology solders the surface mount (Very tight pitch) opamps on their adaptors as to whether it will hum or not and if you just use them in the phono section, a pair of them are $60. I strictly use the RC4136N and the pre's are VERY quiet even with the aluminum RCA plate. Tube Pre's hum, a correctly modded Carver/PL won't. If I get a free moment I'll post the numbers during testing (Glen had similar results with the PL 4000 and the C-4000).
 
Bob Boyer said:
Mine are coming in off by 90 degrees after the upgrade. I'm just rotating once and reposting, which seems to work.
Click to expand...


I think I'll try my PixResizer and resize the 5 Meg pics to a lower resolution and see if that helps. I'm looking at all the pics in my folder for these WO RCA Plates and they are right side up in the folder but when I hit the "Attach Files" they flip upside down. I'll do 2 pics right now after I drop the resolution down to a meg or less and see what happens.
 
You must log in or register to reply here.
Back
Top