AudioAficionado.org  

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

Conrad-Johnson It just sounds right

Reply
 
Thread Tools Display Modes
  #21  
Old 11-06-2013, 11:21 PM
Joe Appierto Joe Appierto is offline
Guest
 
Join Date: Dec 2011
Location: Dayton, NJ
Posts: 507
Default

Quote:
Originally Posted by ronenash View Post
There are 4 rectifier diodes for the B+ power supply (high voltage) and 4diodes for the heater power supply. There is actually another PS for the logic circuit but these have no effect on sound.
Hi Ron,

Would these diodes also be found in the CA200? Or are there analagous ones in the CA200? I have the unit in for repair so this might be an opportune time since the "hood" will be open.

Thanks,
Reply With Quote
  #22  
Old 11-07-2013, 05:18 AM
Briz Vegaas's Avatar
Briz Vegaas Briz Vegaas is offline
Senior Member
 
Join Date: Dec 2011
Posts: 309
Default

Oh no, what have I done. :-). I would get professional advice before touching anything unnecessarily. as I had parts that were faulty I may have been living with sub standard sound prior to the failure. Maybe the fix only brought my CT5 up to spec. The new parts were apparently better quality but beyond that I can only give lay mans advice.

All I know is that in my case the preamp would go through its start up process with the delay and everything but that the power light remained off. Based on the posts above that would confirm that it wasn't the diodes in the logic circuits ( that could not impact sound) as they were working while the unit was broken.

I have one of the dead diodes and it says RHRP860. Then N3 13. A big F. Then AB. It's an odd shape with a metal bit on top with a round hole in it.
Reply With Quote
  #23  
Old 11-07-2013, 06:33 AM
Rayooo Rayooo is offline
Guest
 
Join Date: Jun 2011
Location: Northeast US
Posts: 1,160
Default

..assuming it's OK to post this kind of thing. (I'm a card carrying electronics hacker/nerd. Others may suffer various afflictions if viewing component data-sheets for any length of time)

pretty standard stuff..and yea, if one or more of these fail, especially if/when used in a power supply, it's bad news.


Reply With Quote
  #24  
Old 11-07-2013, 10:03 AM
ronenash ronenash is offline
Guest
 
Join Date: Oct 2010
Location: US-NY
Posts: 1,097
Default

Quote:
Originally Posted by Joe Appierto View Post
Hi Ron,

Would these diodes also be found in the CA200? Or are there analagous ones in the CA200? I have the unit in for repair so this might be an opportune time since the "hood" will be open.

Thanks,
They are found in a any piece of audio equipment and are used to convert the AC voltage after the power transformer to DC.
Reply With Quote
  #25  
Old 11-07-2013, 10:05 AM
ronenash ronenash is offline
Guest
 
Join Date: Oct 2010
Location: US-NY
Posts: 1,097
Default

Quote:
Originally Posted by Briz Vegaas View Post
Oh no, what have I done. :-). I would get professional advice before touching anything unnecessarily. as I had parts that were faulty I may have been living with sub standard sound prior to the failure. Maybe the fix only brought my CT5 up to spec. The new parts were apparently better quality but beyond that I can only give lay mans advice.

All I know is that in my case the preamp would go through its start up process with the delay and everything but that the power light remained off. Based on the posts above that would confirm that it wasn't the diodes in the logic circuits ( that could not impact sound) as they were working while the unit was broken.

I have one of the dead diodes and it says RHRP860. Then N3 13. A big F. Then AB. It's an odd shape with a metal bit on top with a round hole in it.
That's great advise. I would definitely not start to tear any audio gear apart unless you REALLY know what you are doing!

The RHRP860 diode is the bridge rectifier diode. The best and fastest made today are made by Infineon and they have a recovery time of less than 10ns vs. 30-40ns for the best of the rest.
Reply With Quote
  #26  
Old 11-07-2013, 10:13 AM
Joe Appierto Joe Appierto is offline
Guest
 
Join Date: Dec 2011
Location: Dayton, NJ
Posts: 507
Default

Quote:
Originally Posted by ronenash View Post
They are found in a any piece of audio equipment and are used to convert the AC voltage after the power transformer to DC.
Thank you, Ron.
Reply With Quote
  #27  
Old 11-07-2013, 11:24 PM
Puma Cat's Avatar
Puma Cat Puma Cat is online now
Cool, calm scientist

 
Join Date: Aug 2010
Location: East Bay, CA
Posts: 10,916
Default

Quote:
Originally Posted by ronenash View Post
That's great advise. I would definitely not start to tear any audio gear apart unless you REALLY know what you are doing!

The RHRP860 diode is the bridge rectifier diode. The best and fastest made today are made by Infineon and they have a recovery time of less than 10ns vs. 30-40ns for the best of the rest.
I agree, and my CT-5 sounds great, so I am not going to try to get the board out of the CT-5 to replace what may (and probably are...) perfectly good diodes.
__________________
Lumin P1 streamer/DAC/preamp, Constellation Inspiration integrated TT: Michell Gyro SE MkII, SME V, Koetsu Urushi Vermilion, EAR324. Harbeth 30.2s, REL R-305, Shunyata Alpha V2 ICs, Alpha V2 SPs, Sigma XC, Sigma NRv2, Omega QR-s & Alpha NRv2 PCs, segmented Altaira SG stack w/ Alpha & Omega CGCs, Everest 8000 PD. Remote Server Room: Uptone EtherREGEN, AfterDark Master Clock & LPS, Alita, Battle Angel, (Akasa NUC Roon Core), iFi DC Purifiers (for SMPS used for Alita & router), Shunyata Gemini combo power distributor & Altaira-type CG GP-NR hub, Venom & Alpha CGCs, Shunyata NRv14 power cords for digital components.
Reply With Quote
  #28  
Old 11-13-2013, 07:07 AM
Briz Vegaas's Avatar
Briz Vegaas Briz Vegaas is offline
Senior Member
 
Join Date: Dec 2011
Posts: 309
Default

Diode rolling. :-). Very amusing.

Still being amused by the new sound also. Love this CT5 LP70s combo. Looks great sounds wonderful.
Reply With Quote
  #29  
Old 11-13-2013, 12:50 PM
rlw3 rlw3 is offline
Senior Member
 
Join Date: Jul 2012
Location: east bay ca
Posts: 616
Smile

Quote:
Originally Posted by Puma Cat View Post
Hmmm...not sure I'd want a cryo'd 6H30....might make the sound too "hard". Had this problem on some tubes for the Premier 17.

Though, cryo-treating some Mullard CV4003s for my PV-12 did wonders for them. I think it's really tube dependent.
Chryo did not work for me in the input or drivers positions of the pr 12 but did on the power tubes.To me the pr 12 was toooo soft with 6550s and the chryo kt 120s really worked compared to non chryoed 120s and 6550s. In the lp275 both the 6550s and chryo kt 120s were different types of real good synergy with no clear winner. (chryo tubes worked well in my preamp and phono). Where it did not work it was hard and unattractive. The ct 5 is a little harder/faster(which i liked) than the act 2.2 in my experience with regular tubes; causing the act to benefit from a little less warmth and softness and be a little more like a ct 5. I want a tube pre that can do delicate female vocals and then do well with some red chili peppers also-equally well. It is nice that such good sized differences can be experimented with for such little $$$. Solid State owners wish they could make these types of customizations. You dont know till you try

Last edited by rlw3; 11-13-2013 at 12:56 PM.
Reply With Quote
  #30  
Old 11-14-2013, 12:10 AM
Vhiner Vhiner is offline
Guest
 
Join Date: May 2012
Location: St. Louis
Posts: 342
Default

Quote:
Originally Posted by rlw3 View Post
Chryo did not work for me in the input or drivers positions of the pr 12 but did on the power tubes.To me the pr 12 was toooo soft with 6550s and the chryo kt 120s really worked compared to non chryoed 120s and 6550s. In the lp275 both the 6550s and chryo kt 120s were different types of real good synergy with no clear winner. (chryo tubes worked well in my preamp and phono). Where it did not work it was hard and unattractive. The ct 5 is a little harder/faster(which i liked) than the act 2.2 in my experience with regular tubes; causing the act to benefit from a little less warmth and softness and be a little more like a ct 5. I want a tube pre that can do delicate female vocals and then do well with some red chili peppers also-equally well. It is nice that such good sized differences can be experimented with for such little $$$. Solid State owners wish they could make these types of customizations. You dont know till you try
So cryoed tubes will make the CT5 sound harder and faster?
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 06:02 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