AudioAficionado.org  

Go Back   AudioAficionado.org > Manufacturers Forums > Conrad-Johnson

Conrad-Johnson It just sounds right

Reply
 
Thread Tools Display Modes
  #11  
Old 10-28-2011, 11:46 PM
ronenash ronenash is offline
Guest
 
Join Date: Oct 2010
Location: US-NY
Posts: 1,097
Default

Quote:
Originally Posted by MC352 View Post
We need pictures of those big boys glowing!

What is the advantage of using a KT120, more output power?
These tubes can output 150W per pair but only in an amp designed for this. Replacing 6550 in an amp like the Premier 11A you will only gain a bit more power and headroom. Probably around 10-15%. You will gain considerably more tube life as they will not be working very hard.
Reply With Quote
  #12  
Old 10-29-2011, 04:44 PM
Coppy's Avatar
Coppy Coppy is offline
On Florida's Slow Coast
 
Join Date: Feb 2011
Location: Sarasota, Florida
Posts: 616
Default

As to power, if there's no more energy in (plate current) then there can be no more out. I'm guessing that unless you change the power supply circuit, there's really not much, if any more power out. Depending on the CJ design, maybe they'll give you a bit more.
Unlike most mfgrs., even though it's more expensive, CJ usually over designs the supplies to give plenty of headroom. (ever notice how heavy the equipment is... it ain't them caps) So probably a bit more head room. I need to decide if there is really a sonic benefit significant enough to put up with the strange appearance of the LP140 amps sitting around with the tubes projecting above the top of the chassis. Thanks to everyone here for their experience with the new tubes.
Philippe is doing it right, get the ART amps designed with the KT120s to begin with.

Last edited by Coppy; 10-29-2011 at 04:59 PM.
Reply With Quote
  #13  
Old 10-29-2011, 04:54 PM
Rafale's Avatar
Rafale Rafale is offline
Senior Member
 
Join Date: Jun 2011
Location: Tours Loire Valley France
Posts: 2,031
Default

As long as could find SED I shall not pass on KT120, expensive and furthermore it is really not attractive, too oversized imo...the problem with SED in the USA is a legal problem concerning the brand and its retailer's network, they are always made to St Petersbourg to my knowledge
The German retailers are furnished and I just come to receive from it...
__________________
Philippe

l
LP12SE,urika phonostage,radikal power supply, dynavector XV-1s,conrad-johnson GAT and LP275M, Sonus Faber Elipsa,yter/naim/Linn cables, vibex, finite elemente
Reply With Quote
  #14  
Old 10-29-2011, 05:04 PM
Coppy's Avatar
Coppy Coppy is offline
On Florida's Slow Coast
 
Join Date: Feb 2011
Location: Sarasota, Florida
Posts: 616
Default

Philippe,

Your English is way better than my French (thank you) but I'm confused about your last post. What is the USA problem and are you saying you would not change to the KT120s? Maybe I'm not sure what an SED is. My 6550s are fine with maybe 800 hours on them so no need to replace unless there is an opportunity for really better sound. There are plenty of 6550s available here from CJD and tube retailers when I need them.

Bob

Last edited by Coppy; 10-29-2011 at 05:10 PM.
Reply With Quote
  #15  
Old 10-29-2011, 05:52 PM
Rafale's Avatar
Rafale Rafale is offline
Senior Member
 
Join Date: Jun 2011
Location: Tours Loire Valley France
Posts: 2,031
Default

Quote:
Originally Posted by Coppy View Post
Philippe,

Your English is way better than my French (thank you) but I'm confused about your last post. What is the USA problem and are you saying you would not change to the KT120s? Maybe I'm not sure what an SED is. My 6550s are fine with maybe 800 hours on them so no need to replace unless there is an opportunity for really better sound. There are plenty of 6550s available here from CJD and tube retailers when I need them.

Bob
Bob, it is complicated, there are problems enter New Sensor (USA) and PM components (UK ) concerning the distribution of the St Petersburg's 6550 Winged C in the USA
SED Tubes - Vacuum Tubes Manufactured in St Petersburg, Russia
PM Components Ltd - World Leaders in Vacuum Tube Supply
Tube-Shop.com - Vacuum Tubes for Hi-Fi, Guitar and Radio amplifiers
__________________
Philippe

l
LP12SE,urika phonostage,radikal power supply, dynavector XV-1s,conrad-johnson GAT and LP275M, Sonus Faber Elipsa,yter/naim/Linn cables, vibex, finite elemente
Reply With Quote
  #16  
Old 10-29-2011, 10:30 PM
Coppy's Avatar
Coppy Coppy is offline
On Florida's Slow Coast
 
Join Date: Feb 2011
Location: Sarasota, Florida
Posts: 616
Default

Philippe,

Thanks for the links. Looks like The SEDs are currently available in the US only from the UK distributor. I guess that's okay as long as the tube shop is a reliable firm that stands behind their product. Is it your impression that the SEDs are the best brand of 6550s? I note that the tube store also sells Shuggies (Chinese) that I've heard are good. I guess all this explains why CJ didn't want to replace my 6550s when I had it over there for a circuit upgrade last spring.

Also, you would not try the KT120s, is that correct? The amps would surely not be very attractive with those tubes sticking out of them.

Bob
Reply With Quote
  #17  
Old 10-30-2011, 04:45 AM
Rafale's Avatar
Rafale Rafale is offline
Senior Member
 
Join Date: Jun 2011
Location: Tours Loire Valley France
Posts: 2,031
Default

Hi Bob
Yes we consider in Europe that 6550 winged C made to St Petersburg is the best towards the price, there is a lot of attempt of imitation as far as it exists a confusion enters S logo and C logo, the Svetlana name belongs to New Sensor but not C logo, if the tube carries Svetlana he can be also made to Saratov ( Sovtek, EH )
In the end, we can be on that the current choice of the KT120 is only a qualitative choice? I am not on
__________________
Philippe

l
LP12SE,urika phonostage,radikal power supply, dynavector XV-1s,conrad-johnson GAT and LP275M, Sonus Faber Elipsa,yter/naim/Linn cables, vibex, finite elemente
Reply With Quote
  #18  
Old 10-30-2011, 05:43 AM
Rafale's Avatar
Rafale Rafale is offline
Senior Member
 
Join Date: Jun 2011
Location: Tours Loire Valley France
Posts: 2,031
Default

another link
Welcome to SED-USA!
Note that they do not use the word Svetlana
__________________
Philippe

l
LP12SE,urika phonostage,radikal power supply, dynavector XV-1s,conrad-johnson GAT and LP275M, Sonus Faber Elipsa,yter/naim/Linn cables, vibex, finite elemente
Reply With Quote
  #19  
Old 12-21-2011, 09:24 AM
Joe Appierto Joe Appierto is offline
Guest
 
Join Date: Dec 2011
Location: Dayton, NJ
Posts: 507
Default

Quote:
Originally Posted by repman View Post
I just got an email from Ed answering one I sent him regarding the KT-120 tubes and if they are compatible with a Premier 11-A amp.
Ed replied back that it was always drilled into him to only recommend the tubes that came originally with the amp from the factory. He said he was told that he could make an exception with the KT- 120 and he could recommend it as a replacement for the original 6550 power tube however the tube cage would not fit because of the height of the KT-120.
I just ordered a quad of these to try, has anyone here used these in a
11-A ?
I will give my impressions of this amp with this tube after burn in.
Hi,

I'm new to this forum and this is only my second post. I was wondering if you continued to use the KT-120s in your 11A and did you have any problems? I called Ed at conrad-johnson yesterday to ask if it'd be okay to use them but I haven't heard back from him. I've used them in a Pr 140 without any problems but since the 11A is an older model, I wasn't sure if it'd be safe to do so.

Your input is appreciated.

Thanks,
Joe
Reply With Quote
  #20  
Old 12-21-2011, 12:48 PM
chessman's Avatar
chessman chessman is offline
From the BAT cave ...
 
Join Date: Jan 2010
Location: Columbus, OH
Posts: 11,697
Default

Joe, welcome aboard!
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Audioaficionado.org tested by Norton Internet Security

All times are GMT -4. The time now is 06:27 AM.



Powered by vBulletin® Version 3.8.10
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
©Copyright 2009-2023 AudioAficionado.org.Privately owned, All Rights Reserved.
Audio Aficionado Sponsors
AudioAficionado Subscriber
AudioAficionado Subscriber
Inspire By Dennis Had
Inspire By Dennis Had
Harmonic Resolution Systems
Harmonic Resolution Systems
Wyred4Sound
Wyred4Sound
Dragonfire Acoustics
Dragonfire Acoustics
GIK Acoustics
GIK Acoustics
Esoteric
Esoteric
AC Infinity
AC Infinity
JL Audio
JL Audio
Add Powr
Add Powr
Accuphase - Soulution
Accuphase - Soulution
Audio by E
Audio by E
Canton
Canton
Bryston
Bryston
WireWorld Cables
WireWorld Cables
Stillpoints
Stillpoints
Bricasti Design
Bricasti Design
Furutech
Furutech
Shunyata Research
Shunyata Research
Legend Audio & Video
Legend Audio & Video