Search found 50 matches

by plurn
Thu Jul 27, 2023 10:51 pm
Forum: Preamps
Topic: Is the ET5 built better than the ET7 ?
Replies: 24
Views: 4226

Re: Is the ET5 built better than the ET7 ?

a comment I posted back in 2017: "When I compare the insides of the ET7 to the ET5 I am a bit surprised. ET7 has a lot less big white capacitors and has more electrolytic capacitors than the ET5. Also the tube is now on the main board rather than on a vibration isolated daughter board. Just loo...
by plurn
Sat Mar 20, 2021 11:25 am
Forum: Preamps
Topic: PV-5 as headphone amplifier?
Replies: 18
Views: 1492

Re: PV-5 as headphone amplifier?

... So I wonder: 1. What is the exact output impedance of the PV-5 (as a function of frequency)? 2. What is the maximum power output of the PV-5 into 600 ohm headphones (such as the Beyerdynamic T1)? ... For 1, Realistically, you are not going to get that information from anyone though you can try ...
by plurn
Thu Mar 18, 2021 1:13 am
Forum: General Discussion - CJ related topics
Topic: Analog and Digital or Oil and Water with a PV-10A
Replies: 5
Views: 1049

Re: Analog and Digital or Oil and Water with a PV-10A

... Set Up: Media Sony PS-X70 Turntable Bluesound Node 2i Streamer NAD C538 Compact Disc Player Samsung BluRay Samsung HDTV AppleTV ... The PV-10A's Tape Out is connected to the Analog Aux-In via RCA on the Outlaw 975 (which unfortunately has only one set of independent RCA Analog-In jacks. There a...
by plurn
Thu Mar 18, 2021 12:46 am
Forum: General Discussion - CJ related topics
Topic: Analog and Digital or Oil and Water with a PV-10A
Replies: 5
Views: 1049

Re: Analog and Digital or Oil and Water with a PV-10A

... All that said, I can't help but feel that I go through great lengths to keep an analog signal path for the turntable using the PV-10A's excellent MM-only Phono stage. Given the limited flexibility of Outlaw's analog inputs, I run my other audio-only signals (CD, Streamer) through the 10A's avai...
by plurn
Wed Mar 17, 2021 10:39 pm
Forum: Preamps
Topic: PV10 AL with noise problems
Replies: 9
Views: 943

Re: PV10 AL with noise problems

I have e Conrad Johnson PV10AL. The one with three knobs in the front. I have recently changed the tube sockets and tubes because of some squeaking noise problems. And it got way better. But I still have some noise. Its a hissing noise I can hear all the way to listening position when the music sto...
by plurn
Mon Sep 30, 2019 10:39 pm
Forum: Preamps
Topic: Do all CJ legacy preamps do this?
Replies: 8
Views: 1086

Re: Do all CJ legacy preamps do this?

I wonder if this is due to the presence of DC offset on the outputs of your tuners, and the PV6 not filtering out this DC offset, whereas your previous McIntosh pre probably filtered this out. Excessive DC offset is a common cause of thumps and pops. If you have a multimeter you can easily check for...
by plurn
Sat Aug 03, 2019 12:45 am
Forum: Troubleshooting/problems/manuals/schematics
Topic: A Request Please:Internal Photos of a MF2300A or MF2300
Replies: 7
Views: 1765

Re: A Request Please:Internal Photos of a MF2300A or MF2300

... IMG_4016.JPG Here are some photos of an MF2300A. More (and sharper) photos to follow, soon. Hi Mosfet. Nice photos. From that IMG_4016.JPG image, are those larger upright black electrolytic caps with the black tops bulging on top? It is a bit difficult to tell from the image but looks like they...
by plurn
Sat Aug 03, 2019 12:11 am
Forum: Preamps
Topic: My New PV6 (Redirected)
Replies: 7
Views: 1223

Re: My New PV6 (Redirected)

... First was a mildly microphonic tube in the phono left channel. Not discernable with music playing, but when I turned the balance or volume knobs or tapped the faceplate, I'd hear a glassy tink only from the left. ... That glassy tink/ting sound can be normal for some older produced tubes due to...
by plurn
Fri Mar 22, 2019 11:19 am
Forum: General Discussion - CJ related topics
Topic: Conrad Johnson Advertising
Replies: 1
Views: 744

Re: Conrad Johnson Advertising

Not sure if you are after a printed brochure or if a digital image would do? Anyway if digital is ok, you could try searching through this site. They have lots of old magazines scanned and available for reading: https://www.americanradiohistory.com/ Audio magazine might be a good one to try. Might h...
by plurn
Sun Nov 04, 2018 1:14 pm
Forum: Troubleshooting/problems/manuals/schematics
Topic: Premier 17LS buzzing
Replies: 4
Views: 1377

Re: Premier 17LS buzzing

Hi Stephen, Um - why not just go back to what was working originally and stop using the Lundahl transformer? You said "Everything was perfect". Anyway, which specific Lundahl converters did you use? You mention you used "balanced-unbalanced transformers" and I think that perhaps ...
by plurn
Fri Sep 01, 2017 10:31 am
Forum: Amplifiers
Topic: CJ Classic 62SE broken tube!
Replies: 6
Views: 1232

Re: CJ Classic 62SE broken tube!

That must be so frustrating. Hope you get it sorted out soon. Anyway congratulations on your new CJ gear.

When you get your new tube, make sure you follow the "Adjusting Output Tube Bias" section of the manual.

Anthony
by plurn
Tue Aug 29, 2017 1:18 pm
Forum: Preamps
Topic: new ET-7, the replacement for the ET-5
Replies: 31
Views: 6050

Re: new ET-7, the replacement for the ET-5

How much gain does the ET-7 have? The spec for the ET-5 is 25 db, which probably accounts for the relatively shortened tube life before noise. I love my ET-5, btw. Just wish it were not so hard on the tube. At least it is only one tube. If the ET-7 gain spec is lower, say 20 db or so, we can specul...
by plurn
Tue Aug 29, 2017 12:53 pm
Forum: Preamps
Topic: new ET-7, the replacement for the ET-5
Replies: 31
Views: 6050

Re: new ET-7, the replacement for the ET-5

Here is the inside pic of the ET-7. Hi Roberto, Thank you for posting the inside pic. I have not noticed any other website having a picture of its insides so maybe conradjohnsonownsers.com is first. When I compare the insides of the ET7 to the ET5 I am a bit surprised. ET7 has a lot less big white ...
by plurn
Mon Aug 14, 2017 5:36 am
Forum: Preamps
Topic: new ET-7, the replacement for the ET-5
Replies: 31
Views: 6050

Re: new ET-7, the replacement for the ET-5

Thank you Roberto.

Anthony
by plurn
Sat Aug 12, 2017 1:16 pm
Forum: Amplifiers
Topic: Hum problem with LP125m SE
Replies: 21
Views: 3965

Re: Hum problem with LP125m SE

... it exists even when the interconnects from the preamp are not connected. Currently I am using a Torus Power AVR15 for supplying power to the power amps ... A quick update. Floating the ground on both mono blocks completely solves the problem. I am not very comfortable with this solution but whe...
by plurn
Sat Aug 12, 2017 12:43 pm
Forum: Preamps
Topic: new ET-7, the replacement for the ET-5
Replies: 31
Views: 6050

Re: new ET-7, the replacement for the ET-5

Congratulations Roberto and thanks for your impressions.

Can you tell us what tube or tubes it uses? single electro harmonix 6922? or Philips PCC88 maybe? If you are inclined to open up the case, any chance of some pictures of the insides?

Anthony
by plurn
Sat Aug 12, 2017 12:18 pm
Forum: General Discussion - CJ related topics
Topic: Where do you buy your tubes? From Conrad Johnson or ....
Replies: 22
Views: 7383

Re: Where do you buy your tubes? From Conrad Johnson or ....

I stocked up on a heap of new old stock philips PCC88 from Electols/Halfin in Belgium for my ET5. Same tube that CJ uses for GAT 2 (and GAT in some cases). Very likely suitable for ET3 too. Due to Electols long history supplying tubes (since 1946!) I would not be surprised if they bought them direct...
by plurn
Tue Feb 14, 2017 10:09 am
Forum: Troubleshooting/problems/manuals/schematics
Topic: CJ PV10 AL
Replies: 17
Views: 4002

Re: CJ PV10 AL

I'm glad you got it sorted out. Thanks for letting us know. It is alway good to hear about a problem being fixed.

Anthony
by plurn
Wed Jan 25, 2017 11:09 am
Forum: Amplifiers
Topic: CAV45 with Harbeth C7?
Replies: 13
Views: 2634

Re: CAV45 with Harbeth C7?

Glad you sorted it out Scott. Sorry for misdiagnosing the issue.

Anthony
by plurn
Sun Jan 22, 2017 9:24 am
Forum: Amplifiers
Topic: CAV45 with Harbeth C7?
Replies: 13
Views: 2634

Re: CAV45 with Harbeth C7?

... At lower levels it sounds glorious, but at average or slightly above average levels the sounds starts to harden and flatten out. ... Yeah this effect of "harden and flatten out" is the compression you get when driving a tube amp beyond its limits. It is the sound of the clipping of a ...