SimpleSE Checkout/CL-90 Fail - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Tubelab

Tubelab Discussion and support of Tubelab products, prototypes and experiments

Reply
 
Thread Tools Search this Thread
Old 8th March 2011, 05:59 PM   #1
diyAudio Member
 
wushuliu's Avatar
 
Join Date: May 2008
Location: Los Angeles
Unhappy SimpleSE Checkout/CL-90 Fail

Ok, just went through Ty's(?) photo Checkout and everything was fine until I actually powered the amp to check voltages (No tubes, no speaker load). Then CL-90 inrush limiter smoked and broke in half!

I am using Antec 350-0-350, SS rectification. What should I check?
  Reply With Quote
Old 8th March 2011, 07:26 PM   #2
diyAudio Member
 
Join Date: Dec 2008
Location: Victoria, BC
Sounds like a short somewhere.....

I'd suggest (as I always do, sorry...) taking an hour or so and putting together a light bulb current limiter to help prevent smoking your power transformer. Luckily, the inrush limiter blew this time, but it can get tedious replacing limiters.
What size fuse did you have installed?


I don't have much experience with CL90 and similar, but I think they are supposed to be quite reliable??

BTW, you should have speakers or load resistors on the outputs - you don't want to forget them once you put the power tubes in.

Last edited by VictoriaGuy; 8th March 2011 at 07:29 PM.
  Reply With Quote
Old 8th March 2011, 07:30 PM   #3
diyAudio Member
 
wushuliu's Avatar
 
Join Date: May 2008
Location: Los Angeles
Quote:
Originally Posted by VictoriaGuy View Post
Sounds like a short somewhere.....

I'd suggest (as I always do, sorry...) taking an hour or so and putting together alight bulb current limiter to help prevent smoking your power transformer. Luckily, the inrush limiter blew this time, but it can get tedious replacing limiters.
What size fuse did you have installed?


I don't have much experience with CL90 and similar, but I think they are supposed to be quite reliable??
Yes, checked the board again and saw that i had not jumpered sw1 for ss rectification. I used a 1.5A fuse... so off to get more fuses, this time 2A (since thats what everyone seems to be using).
  Reply With Quote
Old 8th March 2011, 08:55 PM   #4
rknize is offline rknize  United States
diyAudio Member
 
rknize's Avatar
 
Join Date: Feb 2009
Location: Chicagoland
Send a message via AIM to rknize Send a message via Yahoo to rknize
The CL-90 can pass 2A continuous. A short should have blown the fuse nearly instantly...long before the CL-90 could have heated that far. I suspect a wiring error. Can you take a picture of this area? The CL90 should be in series with the load (like the fuse), not in parallel with it.
  Reply With Quote
Old 8th March 2011, 09:23 PM   #5
diyAudio Member
 
wushuliu's Avatar
 
Join Date: May 2008
Location: Los Angeles
Yes the fuse was in series. I also forgot to wire sw 1. I mean jumper. Could this have caused it?
I forgot to mention That's the fuse did blow as well...

Last edited by wushuliu; 8th March 2011 at 09:26 PM.
  Reply With Quote
Old 8th March 2011, 11:04 PM   #6
diyAudio Member
 
wushuliu's Avatar
 
Join Date: May 2008
Location: Los Angeles
Turns out I miswired the 6.3v. Rest of the checkout went fine, no problems. BUT I see that I have 563v on B+!!! Is this because I have no load or tubes on the amp?
  Reply With Quote
Old 8th March 2011, 11:47 PM   #7
diyAudio Member
 
Join Date: Jun 2010
You are using an Antek traffo? They are rated for 115v on the primaries. If you're in an area with highish mains, like I am, you are probably actually getting 380-390 on the secondaries.

...not that I've ever made this mistake with Antek iron.
  Reply With Quote
Old 9th March 2011, 12:01 AM   #8
diyAudio Member
 
wushuliu's Avatar
 
Join Date: May 2008
Location: Los Angeles
Quote:
Originally Posted by spopepro View Post
You are using an Antek traffo? They are rated for 115v on the primaries. If you're in an area with highish mains, like I am, you are probably actually getting 380-390 on the secondaries.

...not that I've ever made this mistake with Antek iron.
Actually 138v on Mains. 420v on secondaries. WTF! : (

And 36v on main filaments

Also do I jumper or do anything with the 5v tube rectifier connections. Since I am using SS I have them untouched...

Last edited by wushuliu; 9th March 2011 at 12:28 AM.
  Reply With Quote
Old 9th March 2011, 01:37 AM   #9
diyAudio Member
 
wushuliu's Avatar
 
Join Date: May 2008
Location: Los Angeles
Ok, I've plugged the amp into a voltage regulator, B+ is now 510. 32v at T1 GRN. And the tubes are not lighting up.
Attached Images
File Type: jpg IMG_3126.jpg (517.9 KB, 185 views)

Last edited by wushuliu; 9th March 2011 at 01:40 AM.
  Reply With Quote
Old 9th March 2011, 02:12 AM   #10
rknize is offline rknize  United States
diyAudio Member
 
rknize's Avatar
 
Join Date: Feb 2009
Location: Chicagoland
Send a message via AIM to rknize Send a message via Yahoo to rknize
Is that an Antek toroid? Can you post the specs on it? It looks to me that you have wired the filament windings in series. This is not what you want. It sounds like your meter is a bit out of whack. 36V on the filaments is not good at all! It's best to check these before putting the tubes in.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
90+90 volt rails east electronics Solid State 42 5th April 2011 01:38 PM
Use CL-90 to slow 5Y3? Troncones Tubes / Valves 7 2nd March 2011 02:35 PM
Checkout for Simple Se royd55 Tubelab 1 3rd January 2010 07:09 PM
F/S Gold Lion KT77/EL34 12AT7 5AR4 SimpleSE tubes $90 nvrgdenuf Swap Meet 0 7th September 2009 07:48 PM
Need Amp For 90-0-90 V DC Drafance007 Solid State 15 12th October 2003 08:03 PM


New To Site? Need Help?

All times are GMT. The time now is 08:27 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2