Carver C1 going through rework

[porkchop61]

The rail voltages were within spec, but I haven't looked at ripple yet. That's the first thing I check/rebuild on vintage equipment. I'm obviously replacing all the filter caps.

There are two 120R and 91R voltage dropping resistors on each rail in the PS that should be looked at, as well as a 3.9M line to ground.

 

[J!m]

Since it’s modeled I can laser cut it…

where are you?

 

[porkchop61]

Location is in the sig
About an hour from you, near UCONN Storrs.

1/8” aluminum?

 

[J!m]

I work in south Windsor and that’s where the laser is.

It can cut that, yes.

How many do you need?

 

[porkchop61]

Interesting, I work in South Windsor as well

Nice of you to offer, but I only need one. I have a Bridgeport at work with 3-axis automation, so that’s what I’m going to use. Fine for making one for me. Maybe a group buy here would yield a higher number of parts and make more sense for a laser application.

Back to the main topic for a moment:
I‘m replacing the electrolytics in the signal path with non-polarized Nichicon MUSE ES. Does the orientation matter with these? I think it might for
RF applications, but not audio, I’m just not sure. I’d like to orient them all the same, just because I’m like that.

 

[WOPL Sniffer]

There is NO orientation on Bi-Polar's.

They don't care about polarization. nobody will know but you. turn till your OCD heart is content.

 

[J!m]

I line up resistor color bands.

It also forces me to check the right part is in the right location.

 

[porkchop61]

Thanks Sniffer, I just wanted to make sure before I soldered everything in!

I also align resistor bands for the same reason.

 

[WOPL Sniffer]

I polish the resistors to a mirror finish (till the band color comes off) then piss can the caps green so the next guy who digs in can get REALLY PISSED!!!

Then epoxy everything to the boards

 

[J!m]

Dipping in epoxy for the win. Bonus points for doing that with cold solder joints.

 

[porkchop61]

 

[WOPL Sniffer]

Dipping in epoxy for the win. Bonus points for doing that with cold solder joints.

No cold solder joints bro..... I beef them up with JB Steel Weld

 

[Dutch54]

FYI guys - I upgraded my C1 with all 3 of Sniff's boards and have been extremely impressed with the results.

The green LEDs on your PS board in the PS1 photo look cool where did you get those and if by chance have a part number could I get it also.

 

[WOPL Sniffer]

The green LEDs on your PS board in the PS1 photo look cool where did you get those and if by chance have a part number could I get it also.

I'll send you some in the morning.

 

[fransa]

The Carver C1 preamplifier is getting some updates to make it work better. This includes changing old parts like capacitors and fixing any loose connections. These changes help improve sound quality and keep the preamp working well for a long time while keeping its classic look.

 

[J!m]

Definitely a botanical garden.