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C1 circuit board quality variations..
Ar9JimOffline
#1 Posted: Monday, April 3, 2017 10:27:44 PM(UTC)
 
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I was looking at the" early C1 early model 1982 version C" post that was shared earlier.. That is one of the better looking boards I have seen so far..
 
Anyone else notice the variations in boards seem wide.. Have seem many that were very nice and also seen quite a few that have loose traces and pads that will lift if your not careful..
 
Was it a difference in vendors of the boards that caused this?
 
Is there anyway to know which ones were better, like by order of serial #..
 
It would be useful when shopping if the serial # could be an I.D. for the board inside..
 
They work fine either way, but if shopping, I'd rather get the ones with the better looking boards.. Since we can rarely see inside, any correlation with S/N would be great..
 
Just wondering if anyone ever made this correlation or if it is possible?
 
 
 
 
 
1 user thanked Ar9Jim for this useful post.
Dingman on 4/3/2017(UTC)
DingmanOffline
#2 Posted: Monday, April 3, 2017 11:39:51 PM(UTC)
 
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Hiyas,
I just don't have enough experience with Carver to say for sure about the quality of the traces. I can say that C-1's I've worked on (two) have had nice boards and traces. Ya, some heat damage on the amps (TFM-25 and m-200t) but the C-1's have been in good shape.
The two I've worked on are this C version and an "E" version.
 
These Carvers are easy to work on.... 
Ar9JimOffline
#3 Posted: Monday, April 3, 2017 11:49:35 PM(UTC)
 
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Dingman;300310 wrote:
Hiyas,
I just don't have enough experience with Carver to say for sure about the quality of the traces. I can say that C-1's I've worked on (two) have had nice boards and traces. Ya, some heat damage on the amps (TFM-25 and m-200t) but the C-1's have been in good shape.
The two I've worked on are this C version and an "E" version.
 
These Carvers are easy to work on.... 
I'll start taking pics.. Once in a while you'll see one with quite a bit of trace separation from the board.. 
loner_tOffline
#4 Posted: Tuesday, April 4, 2017 12:19:47 AM(UTC)
 
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We can use this thread to post the serial numbers, board dates and revision ids. It can serve as a correlation thread and a sorted order will reveal the possible range(s) to buy/look-out for. 
Music 2Channel
TX-11a, Technics SL1600 (TT weight courtesy - the Dude), 3 x BillD Silver C1 (4Krow/Dennis Miller), 2 x M500t (MkII - Dennis Miller), Speakers 1 - ADS L1290s/L810s/L710s

2 x NASA TFM-42 , Sony CDP-X707ES, BillD C11 (Dennis Miller), SD/A-490t,
Speakers 2 - Polk SDA-1Cs + Sunfire TS-EQ10s (Rockstar-Rebuilt), Speakers 3 - Pair of Polk Monitor 10B

In the wings...
2 x M500t (MkII - someday), M500t (WIP - MkII - Kve777), Infinity RS-5Bs, M500 (AR9Jim - recap)

Music 2Channel (Black Stack)
SD/A-360, BillD C11 (Dennis Miller), TFM-42 (WIP - Fill35U - courtesy BillWoJo), TX8 (Dennis Miller)

Music 2Channel (Soundstream)
DA-1, C1, T1, 2 x DA2 (Mono), KEF - LS50, JLAudio E110

HT (7.1+)

Oppo BDP-105D, Toshiba HD-XA2, Pioneer CLD-D702,
2 x M500t MkII (Dennis Miller), 2 x M500t (MkII - WRF), M500t (BillD Refresh), KEF - LS50, 4 x Sonorous + JLAudio E110, Sunfire TS-EQ10
1 user thanked loner_t for this useful post.
Ar9Jim on 4/4/2017(UTC)
Ar9JimOffline
#5 Posted: Tuesday, April 4, 2017 1:49:50 PM(UTC)
 
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Here's an example of one that is not too bad but not nearly as nice as others.. Have seen them much worse yet than this one.
 
 
 
 
 
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Charlie on 4/4/2017(UTC)
BarryGOffline
#6 Posted: Tuesday, April 4, 2017 2:06:45 PM(UTC)
 
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On the C-11 that I have, Dennis Miller noted that the pads have plated through holes which I found interesting! I think we came to the conclusion it was a later version! I'll look inside for a revision number next time I reconfigure my system! Also of note the Selector switch is somewhat different than the C-1. My conjecture is that these two changes happened concurrently, but I am not sure!

BarryG
Main System:
Technics SL-7 turntable, Carver TX-11B, Carver C-11 Pre-Amp (BillD MOD by Dennis Miller), Carver C-9 (4krow), Carver M-500t MKII (RichP modded repaired by Wayne aka WRF), Deconvolution Mask (DCM), Carver m-1.0t stock, Carver SDA 370 10 CD player, DBX 3bx-ds expander, DBX 120x-ds, TEAC A-2340R reel to reel,Music Fidelity X-10D Clone Tube Buffer, Cambridge Audio DAC, Dell Laptop, Douglas Connection interconnects x5, Douglas Connection speaker cables, Sony Blu-Ray, Salamander Archetype 5 shelf Rack in Black (x2), Sony XM Satellite Radio, Sunfire TSEQ10 Subwoofer, Carverfest Speakers, Polk SDA 1b speakers.

In Reserve:
Carver MXR-130 Receiver, Sangaen digital am/fm tuner (from BillD), Carver ALS (hybrid, modded for Bi-amp) will be for sale soon! Carver sd/a-390t x2 (one out for repair, other waiting for repair.)

For sale: Carver SD/A-370
1 user thanked BarryG for this useful post.
Ar9Jim on 4/4/2017(UTC)
loner_tOffline
#7 Posted: Tuesday, April 4, 2017 4:06:37 PM(UTC)
 
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loner_t

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BillD (4Krow) Silver C1 (which should be chronologically earlier than the Anthracite C1 or Black C11).
 
 
 
 
 
Music 2Channel
TX-11a, Technics SL1600 (TT weight courtesy - the Dude), 3 x BillD Silver C1 (4Krow/Dennis Miller), 2 x M500t (MkII - Dennis Miller), Speakers 1 - ADS L1290s/L810s/L710s

2 x NASA TFM-42 , Sony CDP-X707ES, BillD C11 (Dennis Miller), SD/A-490t,
Speakers 2 - Polk SDA-1Cs + Sunfire TS-EQ10s (Rockstar-Rebuilt), Speakers 3 - Pair of Polk Monitor 10B

In the wings...
2 x M500t (MkII - someday), M500t (WIP - MkII - Kve777), Infinity RS-5Bs, M500 (AR9Jim - recap)

Music 2Channel (Black Stack)
SD/A-360, BillD C11 (Dennis Miller), TFM-42 (WIP - Fill35U - courtesy BillWoJo), TX8 (Dennis Miller)

Music 2Channel (Soundstream)
DA-1, C1, T1, 2 x DA2 (Mono), KEF - LS50, JLAudio E110

HT (7.1+)

Oppo BDP-105D, Toshiba HD-XA2, Pioneer CLD-D702,
2 x M500t MkII (Dennis Miller), 2 x M500t (MkII - WRF), M500t (BillD Refresh), KEF - LS50, 4 x Sonorous + JLAudio E110, Sunfire TS-EQ10
2 users thanked loner_t for this useful post.
Ar9Jim on 4/4/2017(UTC), Charlie on 4/4/2017(UTC)
zumbiniOffline
#8 Posted: Tuesday, April 4, 2017 5:46:55 PM(UTC)
 
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zumbini

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I've spent the last few years scanning ebay and CL for the serial number of the last C-1 produced. So far that honor goes to member Zeprok123's "red knob" C-1 s/n 26431. I don't know the date it was manufactured, however, gold98gtp has s/n 26341 which is dated 6/15/89. 
 
The oldest unit I have pictures for is xavionics C-1 s/n 24831 dated 11/11/88. The main PCB is revision E: 
 
 
 
Main System
Carver Gear: C-11 (BillD-modified, w/balanced outs), M-500 (refit by BillD), M-500t(x2) (refit by BillD), M-500t MK2 (Daddyjt), SD/A 490t, TX-11b
Other Electronics: Behringer Super-X Pro CX3400, Behringer Ultragraph FBQ3102, Furman PS-8R-II, Nikko NPS-1, Teac C-3RX, Technics SL-D303
Speakers: Legacy Audio Custom Super Satellites (new drivers and biamp-able XOs 2010), Legacy Audio Custom Subwoofers (reconed 2010)

Workshop System: MXR-130 Receiver, DTL-50 CDP, Musical Fidelity X-10D, Design Acoustics DA-30 (DA-20LF sub w/2 DA-10 satellites, sub reconed 2010)

Son's System: CT-Seven, DTL-200 MKII, M-1.5t (DIY recap 2011), Hitachi PS-38 (TT), Polk SRS SDA 1.2tl, Klipsch KG2.5, PSB Century Subsonic 2i powered sub

Not In Use or Need Repair: Aphex 124A, Carver C-2 (modified by BillD, w/balanced outs), Carver DTL-50, Carver TX-2, Denon DCM-35 (CDC), Teac X10R (RTR), Technics SL-1200MK1 (TT), Yamaha CDX-820 (CDP)

weitrhino wrote:
2 users thanked zumbini for this useful post.
Ar9Jim on 4/4/2017(UTC), Charlie on 4/4/2017(UTC)
zumbiniOffline
#14 Posted: Tuesday, April 4, 2017 7:59:41 PM(UTC)
 
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zumbini

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FYI: Zeprok's C-1 s/n 26431 is now owned by member robvon who fixed it (tone pot issues) and replaced the red knob.
I just PM'd him a request for manufacture date and board revision info and asked him to post photos here.
Main System
Carver Gear: C-11 (BillD-modified, w/balanced outs), M-500 (refit by BillD), M-500t(x2) (refit by BillD), M-500t MK2 (Daddyjt), SD/A 490t, TX-11b
Other Electronics: Behringer Super-X Pro CX3400, Behringer Ultragraph FBQ3102, Furman PS-8R-II, Nikko NPS-1, Teac C-3RX, Technics SL-D303
Speakers: Legacy Audio Custom Super Satellites (new drivers and biamp-able XOs 2010), Legacy Audio Custom Subwoofers (reconed 2010)

Workshop System: MXR-130 Receiver, DTL-50 CDP, Musical Fidelity X-10D, Design Acoustics DA-30 (DA-20LF sub w/2 DA-10 satellites, sub reconed 2010)

Son's System: CT-Seven, DTL-200 MKII, M-1.5t (DIY recap 2011), Hitachi PS-38 (TT), Polk SRS SDA 1.2tl, Klipsch KG2.5, PSB Century Subsonic 2i powered sub

Not In Use or Need Repair: Aphex 124A, Carver C-2 (modified by BillD, w/balanced outs), Carver DTL-50, Carver TX-2, Denon DCM-35 (CDC), Teac X10R (RTR), Technics SL-1200MK1 (TT), Yamaha CDX-820 (CDP)

weitrhino wrote:
1 user thanked zumbini for this useful post.
Ar9Jim on 4/17/2017(UTC)
zumbiniOffline
#15 Posted: Tuesday, April 4, 2017 8:22:59 PM(UTC)
 
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zumbini

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My early C-11 (s/n 00003) is not dated but we know the new model was released in the fall of 1989.
 
 
Apparently the main circuit board was revised though I don't see what has changed. It's listed as revision 1.
 
Photo #1
 
Photo #2
 
Photo #3
 
Photo #4
 
Photo #5
 
Photo #6
 
 
Foil Side with BillD's balanced output driver and precognition matrix daughter boards.
 
Some close-ups of the foil side near BillD's balanced driver daughter board:
 
 

 

 
Main System
Carver Gear: C-11 (BillD-modified, w/balanced outs), M-500 (refit by BillD), M-500t(x2) (refit by BillD), M-500t MK2 (Daddyjt), SD/A 490t, TX-11b
Other Electronics: Behringer Super-X Pro CX3400, Behringer Ultragraph FBQ3102, Furman PS-8R-II, Nikko NPS-1, Teac C-3RX, Technics SL-D303
Speakers: Legacy Audio Custom Super Satellites (new drivers and biamp-able XOs 2010), Legacy Audio Custom Subwoofers (reconed 2010)

Workshop System: MXR-130 Receiver, DTL-50 CDP, Musical Fidelity X-10D, Design Acoustics DA-30 (DA-20LF sub w/2 DA-10 satellites, sub reconed 2010)

Son's System: CT-Seven, DTL-200 MKII, M-1.5t (DIY recap 2011), Hitachi PS-38 (TT), Polk SRS SDA 1.2tl, Klipsch KG2.5, PSB Century Subsonic 2i powered sub

Not In Use or Need Repair: Aphex 124A, Carver C-2 (modified by BillD, w/balanced outs), Carver DTL-50, Carver TX-2, Denon DCM-35 (CDC), Teac X10R (RTR), Technics SL-1200MK1 (TT), Yamaha CDX-820 (CDP)

weitrhino wrote:
3 users thanked zumbini for this useful post.
Charlie on 4/4/2017(UTC), loner_t on 4/4/2017(UTC), Ar9Jim on 4/17/2017(UTC)
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