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Screedm

New Around These Parts
#1
Joined
Oct 6, 2023
Messages
4
#1
Hi Guys
I'm new around here trying to figure things out . I have A C-1 Preamp that I interested in doing the BillD mod and Gundry filter and the power supply upgrade that WOPL sniffer did on the C-1. I bought My Phase Linear 4000 series 2 and 400 series 2 New in 1979. the 400 is still working good. the 4000 preamp 1g channel has no output also thinking of upgrading it also.
Any Info would be apricated Thanks
Screedm
 
MarkWComer

MarkWComer

Veteran and General Yakker
#2
Joined
Nov 1, 2014
Messages
3,493
Location
Gaston, SC
Tagline
Victim of the record bug since age five
#2
Hello and welcome!

I have a 4000 S2, getting a bit flaky here and there. I’ve been inside, upgrading would be a nightmare. The PK unlimit and autocorrelator are great circuits, really bring more life to LPs. A lot of techs won’t touch them with a ten foot pole that they’ve rented somewhere, and a few guys here don’t like them, mainly for the backplane and daughtercard architecture. Solder cracks on the backplane connectors can be the issue or so I’ve heard, so a good place to start would be to reheat all those joints at the connector, hit them with a squirt of DeOxit, see if that helps.

I think that overall it’s a great preamp, but the manufacturing design has some problems.
 
MarkWComer

MarkWComer

Veteran and General Yakker
#3
Joined
Nov 1, 2014
Messages
3,493
Location
Gaston, SC
Tagline
Victim of the record bug since age five
#3
Screedm said:
Hi Guys
I'm new around here trying to figure things out . I have A C-1 Preamp that I interested in doing the BillD mod and Gundry filter and the power supply upgrade that WOPL sniffer did on the C-1. I bought My Phase Linear 4000 series 2 and 400 series 2 New in 1979. the 400 is still working good. the 4000 preamp 1g channel has no output also thinking of upgrading it also.
Any Info would be apricated Thanks
Screedm
Click to expand...
Uhmmm… get a DC protection circuit on that 400 ASAP!
 
mlucitt

mlucitt

Veteran and General Yakker
#5
Joined
Jun 24, 2011
Messages
3,469
Location
Jacksonville, FL
#5
Welcome Screedm, where are you?
Mark Comer is correct, the Phase Linear 4000 Series II preamps can be a problem, although they are a vast improvement over the original 4000 with the joystick. No tech I know will work on those boat anchors. I tried, and found many solder cracks on the RCA Jack connections and the "motherboard" connector pin interfaces. I re-soldered them and tested the unit - it was perfect. Then more broken solder connections occurred during the return shipment.

I really like the Carver C-1, I think they went downhill from there except the C-19, that was Carver's Flagship Preamplifier. Buy it if you can find one.

This is the right place for Phase Linear and Carver folks.
 
S

Screedm

New Around These Parts
#6
Joined
Oct 6, 2023
Messages
4
#6
Hi Mlucitt
I’m from California. We have been emailing back and forth about my 200 series 2 amp and You did My Wopl board for My 400 series 2. Haven’t worked on the 400 yet waiting til after I finish the 200. You have been such a great help on everything thank you so much.
 
mlucitt

mlucitt

Veteran and General Yakker
#14
Joined
Jun 24, 2011
Messages
3,469
Location
Jacksonville, FL
#14
Screedm said:
Hi Mlucitt
I’m from California. We have been emailing back and forth about my 200 series 2 amp and You did My Wopl board for My 400 series 2. Haven’t worked on the 400 yet waiting til after I finish the 200. You have been such a great help on everything thank you so much.
Click to expand...
Oh, I did not recognize your screen name...
 
marcok

marcok

Chief Journeyman
#15
Joined
Jun 9, 2014
Messages
1,053
Location
Milan Italy
Tagline
I'm very curious about any tech item
#15
Screedm said:
What Do You guys think about the C-4000 preamp ?
Click to expand...
I have a C4000 and it sounds great for me ! Anyway its setup is difficult due to the spedial functions ,
expecially Hologram and delay time unit.
Ciao from Italy
Marco
 
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