The smell of resistors in the evening - Page 2 - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Tubelab
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Tubelab Discussion and support of Tubelab products, prototypes and experiments

Reply
 
Thread Tools Search this Thread
Old 16th June 2014, 12:57 PM   #11
diyAudio Member
 
moggi1964's Avatar
 
Join Date: Dec 2010
Location: Sale. UK
Have two 10M45's and two R16's coming (best to be sure, right!) and just bought a new pair of 5842's on the bay.

The old CCS is proving a pig to remove, I think I need a second set of hands so will attempt that tonight.

Thanks JP
__________________
TEAC RH 500 Amplifier Vista Phono1+ w/ TEAC TN-400. Loth-X Ion 1 BS & Emotiva XDA2. WIP: Tubelab SE 300b
  Reply With Quote
Old 16th June 2014, 02:01 PM   #12
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: The great city of Turnhout, BE
Blog Entries: 7
Just cut it off and remove the stumps one by one...
__________________
Whether we like to think of it this way or not, an audio engineer shares the professional goal of a magician - Richard Heyser
Linear Audio Vol 12 is out! Check out my Autoranger and SilentSwitcher on Kickstarter!
  Reply With Quote
Old 16th June 2014, 03:04 PM   #13
diyAudio Member
 
moggi1964's Avatar
 
Join Date: Dec 2010
Location: Sale. UK
Now why didn't I think of that!

Thanks Jan, saved me a bunch of time and frustration.
__________________
TEAC RH 500 Amplifier Vista Phono1+ w/ TEAC TN-400. Loth-X Ion 1 BS & Emotiva XDA2. WIP: Tubelab SE 300b
  Reply With Quote
Old 17th June 2014, 03:21 PM   #14
diyAudio Member
 
moggi1964's Avatar
 
Join Date: Dec 2010
Location: Sale. UK
So I discovered that some solder had run down one of the legs (picture soldering underneath with the CCS hanging upsidedown) and had managed to form a bridge between two legs (too much solder I guess).

Won't make that mistake again.....hopefully!
__________________
TEAC RH 500 Amplifier Vista Phono1+ w/ TEAC TN-400. Loth-X Ion 1 BS & Emotiva XDA2. WIP: Tubelab SE 300b
  Reply With Quote
Old 17th June 2014, 03:43 PM   #15
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: The great city of Turnhout, BE
Blog Entries: 7
Quote:
Originally Posted by moggi1964 View Post
Won't make that mistake again.....hopefully!
Ohh but you will - I've done if more than I like to admit.
But then you develop a habit to look for that sort of thing first

Most diy-ers transition from 'that part must be broken' to 'what could I have possibly have done wrong here' within a couple of years

Jan
__________________
Whether we like to think of it this way or not, an audio engineer shares the professional goal of a magician - Richard Heyser
Linear Audio Vol 12 is out! Check out my Autoranger and SilentSwitcher on Kickstarter!
  Reply With Quote
Old 25th June 2014, 10:41 PM   #16
diyAudio Member
 
moggi1964's Avatar
 
Join Date: Dec 2010
Location: Sale. UK
LOL

Well the parts are replaced but now I am getting weird numbers from B+ and B- and they are on runaway.

I need to spend some time checking through the changes I made and then I'll start a new thread if I cannot resolve the issues. Be a couple of weeks though before I can get to it.

Thanks for all your help everyone.
__________________
TEAC RH 500 Amplifier Vista Phono1+ w/ TEAC TN-400. Loth-X Ion 1 BS & Emotiva XDA2. WIP: Tubelab SE 300b
  Reply With Quote
Old 28th July 2014, 11:45 PM   #17
diyAudio Member
 
moggi1964's Avatar
 
Join Date: Dec 2010
Location: Sale. UK
So managed to get B+ and B- in check but when measuring C9 to ground and C11 to ground (with rectifier and the 5842's in place) I am getting runaway high voltages where I should expect to get something around 175Vdc.

Up till that point the checkout was going to plan.

Suggestions on what to check are welcomed.

Thanks.
__________________
TEAC RH 500 Amplifier Vista Phono1+ w/ TEAC TN-400. Loth-X Ion 1 BS & Emotiva XDA2. WIP: Tubelab SE 300b
  Reply With Quote
Old 29th July 2014, 03:26 PM   #18
JP is offline JP  United States
diyAudio Member
 
JP's Avatar
 
Join Date: Jan 2011
Location: New York, NY
You'll get high voltages until the tubes start to conduct. Mine takes ~30 seconds or so to stabilize, then you adjust from there with the trimmer.
  Reply With Quote
Old 29th July 2014, 09:54 PM   #19
diyAudio Member
 
moggi1964's Avatar
 
Join Date: Dec 2010
Location: Sale. UK
I am using a Variac and getting well over 200Vdc and rising at only 70Vac on the Variac.

I'm worried about letting it run on or increasing the voltage.

Will R16, and it's equivalent on the other channel, blow before anything else does? If so, I'll risk it

Thanks JP.
__________________
TEAC RH 500 Amplifier Vista Phono1+ w/ TEAC TN-400. Loth-X Ion 1 BS & Emotiva XDA2. WIP: Tubelab SE 300b
  Reply With Quote
Old 29th July 2014, 10:12 PM   #20
JP is offline JP  United States
diyAudio Member
 
JP's Avatar
 
Join Date: Jan 2011
Location: New York, NY
I see nearly full B+ at initial power on - on my monster EML 520B TSE, that's 520VDC. No problems.

Remember that you're also starving the filaments using the variac = less emission = less current the tube can pass. This means the condition will last longer.
  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
Good Evening justaman Introductions 3 12th September 2013 07:05 PM
Evening all :) TheGabbleDuck Introductions 2 22nd February 2013 10:46 PM
Good Evening from UK spookybus Introductions 2 21st June 2012 08:48 PM
Good Evening Wembley!!! ElDavido Introductions 4 9th August 2011 01:39 AM


New To Site? Need Help?

All times are GMT. The time now is 12:54 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
Copyright 1999-2016 diyAudio

Content Relevant URLs by vBSEO 3.3.2
Wiki