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by admin
Thu Nov 23, 2017 6:56 pm
Forum: General Discussion - CJ related topics
Topic: Correct Phase
Replies: 3
Views: 9

Re: Correct Phase

Both the PV9 and Evolution 2000 are phase inverting so if the sub is after the amp, you don't have to phase invert it.
by admin
Thu Nov 23, 2017 7:14 am
Forum: General Discussion - CJ related topics
Topic: Correct Phase
Replies: 3
Views: 9

Re: Correct Phase

First, welcome to the site. Which CJ preamp are you using? We should make sure that it is phase inverting. Presuming it is we need to know how the sub is connected to the system. If it's via RCA from the preamp as a passthrough, you would need to select 180 phase on the sub (ie phase convert). You a...
by admin
Wed Nov 15, 2017 10:16 pm
Forum: General Audio and Video Discussion
Topic: What have you been watching?
Replies: 55
Views: 10695

Re: What have you been watching?

I've started to look at doing an upgrade to my home theater system in the near future. What has kept me away has been the lack of affordable 4K projectors. I understand that they are releasing some new 4K projector models in the next few months. Although the Epson 5400UB is not "full 4K" I hear that...
by admin
Wed Nov 15, 2017 10:08 pm
Forum: McCormack
Topic: DNA-750s again.
Replies: 2
Views: 20

Re: DNA-750s again.

Looks like they are "coming back home". Keep us updated on the restoration project!
by admin
Sun Nov 12, 2017 8:52 am
Forum: Classifieds and Wanted
Topic: Conrad Johnson DV-2B CD Player (120V)
Replies: 2
Views: 116

Re: Conrad Johnson DV-2B CD Player (120V)

Per CJ2000.

NO LONGER AVAILABLE FOR SALE.
by admin
Sun Nov 12, 2017 8:49 am
Forum: Preamps
Topic: ET3 burn in period?
Replies: 17
Views: 103

Re: ET3 burn in period?

I would also go with Roberto's recommendation of +300 hours of burn-in. When I replaced a single bad tube in my PV12 I noticed a significant improvement in sound after about 50 hours. So you may notice improvement earlier on but you never know as each tube and piece of equipment is different. The "1...
by admin
Wed Nov 08, 2017 10:38 pm
Forum: Member Presentation Thread
Topic: New member in Alaska
Replies: 1
Views: 35

Re: New member in Alaska

First, welcome to the site. Nice to have you with us.

Take a look at the schematic which we have on file here: viewtopic.php?f=17&t=128
by admin
Wed Nov 08, 2017 7:35 am
Forum: Preamps
Topic: CJ Classic preamp options and help
Replies: 4
Views: 49

Re: CJ Classic preamp options and help

You can try making the Marantz 7. I think there is some mixed opinion about the sound quality with newer components. I found this thread that you may want to read: http://audiokarma.org/forums/index.php? ... 7c.247031/
by admin
Tue Nov 07, 2017 8:32 am
Forum: Preamps
Topic: pre-amp sc26
Replies: 2
Views: 25

Re: pre-amp sc26

You are correct, there is no on/off switch. Just shows you that CJ was ahead of the game with their "plug and play" technology! :)
by admin
Tue Nov 07, 2017 7:37 am
Forum: Preamps
Topic: CJ Classic preamp options and help
Replies: 4
Views: 49

Re: CJ Classic preamp options and help

Unfortunately, we do not have the classic phono stage schematic in our database so if you wanted to build that from scratch you would need to find the schematic first. In all honesty, it would probably be much easier to get a stand-alone phono preamp (or build one if you are set on doing it yourself).
by admin
Tue Nov 07, 2017 7:33 am
Forum: Member Presentation Thread
Topic: Hi all from noosa australia
Replies: 1
Views: 15

Re: Hi all from noosa australia

Welcome to the site, great to have you with us!
by admin
Mon Oct 30, 2017 7:27 am
Forum: Troubleshooting/problems/manuals/schematics
Topic: Premier 17LS buzzing
Replies: 3
Views: 35

Re: Premier 17LS buzzing

You can substitute the preamp by using a 3.5mm to RCA connector from you phone. This is rather good method for hunting down ground loop issues as a phone is isolated from the household current so there should be no ground loop issue with a free floating phone providing the input. As for substituting...
by admin
Sat Oct 28, 2017 8:56 pm
Forum: Troubleshooting/problems/manuals/schematics
Topic: Premier 17LS buzzing
Replies: 3
Views: 35

Re: Premier 17LS buzzing

Hi Stephen, First, welcome to the site. Sorry to hear you are having problems. I would try to do a little process of elimination. Do you have another amp that takes regular RCA cables? I would see if you still have the problem with a regular RCA cable vs the complicated RCA to a balanced system you ...
by admin
Fri Oct 20, 2017 8:09 pm
Forum: Preamps
Topic: Successful PV7 - home repair
Replies: 2
Views: 48

Re: Successful PV7 - home repair

Nice job! As our equipment ages, they sometimes need a little loving care to get them back to their former glory.
by admin
Fri Oct 20, 2017 11:08 am
Forum: General Discussion - CJ related topics
Topic: MV100 blowing output tubes
Replies: 2
Views: 324

Re: MV100 blowing output tubes

Hi. I know that this is an older post, but I am new to the forum, and happen to have a factor service manual, as well as an mv100 that is a eat's EL 34s for breakfast!! If you are still looking for the service manual, I will scan and send it to you. If you have the time to scan it and send it to me...
by admin
Thu Oct 19, 2017 11:35 am
Forum: Troubleshooting/problems/manuals/schematics
Topic: Official Schematics and Manuals Thread (Registered Users)
Replies: 63
Views: 19736

Re: Official Schematics and Manuals Thread (Registered Users)

paco1964 wrote:
Thu Oct 19, 2017 10:31 am
For the PV8 premp its only a schematic. Do you have a service manual?
Whatever we have is in the database.
by admin
Wed Oct 11, 2017 12:47 pm
Forum: Member Presentation Thread
Topic: Hello from Wisconsin
Replies: 3
Views: 50

Re: Hello from Wisconsin

Ah, I see. I agree with you, if the speakers are going to be right up against the wall, planar speakers may not be the best choice. There can be some workarounds as acoustic dampening right behind the speaker. You may want to show the wife some pictures, many of the magnepan models do have an "older...
by admin
Wed Oct 11, 2017 9:23 am
Forum: Member Presentation Thread
Topic: Hello from Wisconsin
Replies: 3
Views: 50

Re: Hello from Wisconsin

Hi C1ear, Welcome to the site. Great to have you with us. Congrats on the mv100 and premier 3, very nice. Is there a reason why you are going for a DIY speaker? Not to say that is bad,... but high-end speaker design is pretty hard. I don't think some cheap woofers off of parts express is the way to ...
by admin
Tue Oct 10, 2017 11:43 am
Forum: General Discussion - CJ related topics
Topic: Conrad Johnson Factory Tour - 2003 Soundstage! article
Replies: 5
Views: 665

Re: Conrad Johnson Factory Tour - 2003 Soundstage! article

Thanks for the updated link. And I will save an archive of the article here on CJO as well.
by admin
Sat Oct 07, 2017 8:16 am
Forum: General Discussion - CJ related topics
Topic: ART 150/300 Anniversary Amplifiers
Replies: 10
Views: 699

Re: ART 150/300 Anniversary Amplifiers

That looks amazing, look at those tubes!