Search found 15 matches
- 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...
- 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...
- 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...
- 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...
- Fri Feb 03, 2023 1:06 am
- Forum: Amplifiers
- Topic: CJ LP70S
- Replies: 32
- Views: 4682
Re: CJ LP70S
No. Do NOT do this. KT88s are NOT compatible with the 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.
- Fri Feb 03, 2023 1:05 am
- Forum: Amplifiers
- Topic: CJ LP70S
- Replies: 32
- Views: 4682
Re: CJ LP70S
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.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.
- 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.
- 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...
- 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...
- 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.
- Fri Jun 07, 2019 1:05 am
- Forum: Classifieds and Wanted
- Topic: Premier 350SA for sale
- Replies: 4
- Views: 1619
- 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?
Did you sell your Pr17?
- Sun Nov 26, 2017 4:31 pm
- Forum: Member Presentation Thread
- Topic: Hi from East Bay, CA
- Replies: 5
- Views: 1326
- 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
Thanks, Joe. I know you from another forum...it is AA or Head-Fi or someplace else?
- 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...