Search found 15 matches

by Puma Cat
Fri Feb 03, 2023 11:40 am
Forum: Amplifiers
Topic: CJ LP70S
Replies: 32
Views: 4682

Re: CJ LP70S

Attn: Puma Cat Why not KT88 in the LP70S? Was there something that went wrong by using KT88's...? Please specify your findings as this is the first time I've ever come across any issues using the KT88 series. There are other tubes that obviously can't be used in that circuit, such as EL34, 300B and...
by Puma Cat
Fri Feb 03, 2023 11:40 am
Forum: Amplifiers
Topic: CJ LP70S
Replies: 32
Views: 4682

Re: CJ LP70S

Yes, I’m curious to know why PC would be adamantly opposed to this swap. The bases and pin assignments, including heater voltage and current, are identical. They are widely viewed as harmlessly interchangeable. I couldn’t care less myself … the whole idea of tube rolling is contrary to everything I...
by Puma Cat
Fri Feb 03, 2023 1:43 am
Forum: Classifieds and Wanted
Topic: FS: LP0S stereo amplifier
Replies: 0
Views: 5599

FS: LP0S stereo amplifier

For sale is my Conrad-Johnson LP70S stereo power amplifier. Before the advent of the ART series, the C-J Linear Pentode series of amplifiers represented the very top of Conrad-Johnson's tube amplifier range. The LP70S was their stereo amplifier, rated at 70 Wpc using 6550s or KT-120s. Cosmetically r...
by Puma Cat
Fri Feb 03, 2023 1:08 am
Forum: Amplifiers
Topic: CJ LP70S
Replies: 32
Views: 4682

Re: CJ LP70S

Also, the 6550 is a great tube, and the KT-120 is a direct replacement. If you can afford both, I would try it too. I have done in several power amps, including ARC power amps, with very good results. On the other hand, the tubes don't need to be matched pairs. The bias circuit in Conrad Johnson ge...
by Puma Cat
Fri Feb 03, 2023 1:06 am
Forum: Amplifiers
Topic: CJ LP70S
Replies: 32
Views: 4682

Re: CJ LP70S

AnotherJohnson wrote: Wed Jan 04, 2023 10:07 am But that doesn’t mean it can’t be done. And it also doesn’t mean that the mismatch will bother you.
No. Do NOT do this. KT88s are NOT compatible with the LP70S.
by Puma Cat
Fri Feb 03, 2023 1:05 am
Forum: Amplifiers
Topic: CJ LP70S
Replies: 32
Views: 4682

Re: CJ LP70S

AnotherJohnson wrote: Wed Jan 04, 2023 9:33 am KT88s and 6550s are supposed to be functionally interchangeable (full sets, not mixed sets) in CJ gear without internal mods.
I own an LP70S and I can unequivocally state that KT88s are NOT compatible with the LP70S. Do not use this tube with the LP70S. You can use KT-120s just fine. Not KT88s.
by Puma Cat
Thu Jun 25, 2020 6:36 pm
Forum: Classifieds and Wanted
Topic: CT-5 for Sale
Replies: 2
Views: 711

Re: CT-5 for Sale

Thank you, Joe.
by Puma Cat
Thu Jun 18, 2020 6:37 pm
Forum: Classifieds and Wanted
Topic: CT-5 for Sale
Replies: 2
Views: 711

CT-5 for Sale

For sale is my CJ CT-5 preamp. One of C-J's best preamps, fully comparable in performance to the legendary ACT2. Excellent condition functionally and cosmetically. No nicks in the front panel, only a couple very light, thin "scuffs" at the back of the the top cover, which are hard to see u...
by Puma Cat
Fri Oct 18, 2019 1:43 pm
Forum: General Discussion - CJ related topics
Topic: What speakers are you using with your Conrad Johnson gear?
Replies: 105
Views: 14666

Re: What speakers are you using with your Conrad Johnson gear?

Harbeth 30.2 and Dynaudio Contour S3.4 with Esotar 2 tweeters with my CT-5 and LP70S. Very nice. I think last year they released the 40th anniversary edition of the 30.2's. When the same speaker design is utilized for four decades it really speaks to the quality of the original design. Congrats. Th...
by Puma Cat
Tue Oct 15, 2019 8:19 pm
Forum: General Discussion - CJ related topics
Topic: What speakers are you using with your Conrad Johnson gear?
Replies: 105
Views: 14666

Re: What speakers are you using with your Conrad Johnson gear?

Harbeth 30.2 and Dynaudio Contour S3.4 with Esotar 2 tweeters with my CT-5 and LP70S.
by Puma Cat
Fri Jun 07, 2019 1:05 am
Forum: Classifieds and Wanted
Topic: Premier 350SA for sale
Replies: 4
Views: 1619

Re: Premier 350SA for sale

jahatl513 wrote: Fri Apr 13, 2018 6:56 pm I"m thinking of selling my Premier 350sa in pristine condition. I wonder were is a good place to list it?
Jahat,
Did you sell your Pr350SA? If not, what are you asking for it?
by Puma Cat
Fri Jun 07, 2019 1:04 am
Forum: Classifieds and Wanted
Topic: For Sale: Premier 17LS Pre Amp (original owner)
Replies: 5
Views: 1162

Re: For Sale: Premier 17LS Pre Amp (original owner)

Yaro,
Did you sell your Pr17?
by Puma Cat
Sun Nov 26, 2017 4:31 pm
Forum: Member Presentation Thread
Topic: Hi from East Bay, CA
Replies: 5
Views: 1326

Re: Hi from East Bay, CA

admin wrote: Sun Nov 26, 2017 8:02 am Welcome to the site, it's nice to have you with us!

That is one good looking system! Very nice.
Thanks! Nice to be here.
by Puma Cat
Sun Nov 26, 2017 4:30 pm
Forum: Member Presentation Thread
Topic: Hi from East Bay, CA
Replies: 5
Views: 1326

Re: Hi from East Bay, CA

Joe Appierto wrote: Sun Nov 26, 2017 7:13 am Welcome, Stephen. :)
Thanks, Joe. I know you from another forum...it is AA or Head-Fi or someplace else?
by Puma Cat
Sat Nov 25, 2017 11:15 pm
Forum: Member Presentation Thread
Topic: Hi from East Bay, CA
Replies: 5
Views: 1326

Hi from East Bay, CA

Hi folks, just joined after a friend recommended this site to me. Some background – professional scientist by profession: Molecular Biologist with a background in human molecular genetics and diagnostics. Also a Six Sigma and Design for Six Sigma Black Belt. Spent a lot of time in my scientific care...