Go Back   Home > Forums > > >

Tubelab Discussion and support of Tubelab products, prototypes and experiments

Reply
 
Thread Tools
Old 6th December 2019, 09:02 PM   #1
Duke58 is offline Duke58  United States
diyAudio Member
 
Join Date: Jan 2009
Default Tubelab SE-II Checkout

I'm using the Tubelab SE schematic and checkout procedure from the Tubelab website and can't find R7?

Has it been replaced with R6 on the TSE-II board?

Thanks!
  Reply With Quote
Old 6th December 2019, 09:22 PM   #2
Andrewbee is offline Andrewbee  Jamaica
diyAudio Member
 
Join Date: Apr 2002
Location: Cayman Islands
In the TSE II it ishttp://www.tubelab.com/images/Assemb.../TSE_board.jpgs in the bias supply circuit located after C7
__________________
None of us are leaving this world alive. Enjoy it responsibly as you may.
  Reply With Quote
Old 6th December 2019, 09:39 PM   #3
Duke58 is offline Duke58  United States
diyAudio Member
 
Join Date: Jan 2009
On the TSE-II board I have- there is no R7. The link you sent is for the TSE board, not TSE-II. I have that schematic.

Thanks anyway.

Anybody built a TSE-II recently??
  Reply With Quote
Old 6th December 2019, 09:50 PM   #4
Andrewbee is offline Andrewbee  Jamaica
diyAudio Member
 
Join Date: Apr 2002
Location: Cayman Islands
Its no longer used in TSE II

After a 14 year run, the TSE must DIE!

Look at Post #1

B.O.M.

It states no longer used.

Whatever has been published by George regarding the TSE II is in these pdf's.
__________________
None of us are leaving this world alive. Enjoy it responsibly as you may.
  Reply With Quote
Old 6th December 2019, 10:26 PM   #5
Duke58 is offline Duke58  United States
diyAudio Member
 
Join Date: Jan 2009
Hi Andrewbee- Yes, I know that...

My question is- has R7 been replaced by R6 on the TSE-II board. The new board that Tubelab hasn't had time to post a schematic.

I am trying to do the checkout of the new board I finished populating with all the components.

According to the old schematic (TSE) and checkout procedure on the Tubelab website, you can check the B- voltage by applying test leads between R7.

It looks like R7 has been replaced by R6 on the TSE-II board I have.

Nobody has built the new TSE-II amp can verify this?
  Reply With Quote
Old 6th December 2019, 10:37 PM   #6
Duke58 is offline Duke58  United States
diyAudio Member
 
Join Date: Jan 2009
No checkout procedure.

It's okay, I'll use the updated schematic and write one.
  Reply With Quote
Old 7th December 2019, 01:31 AM   #7
Andrewbee is offline Andrewbee  Jamaica
diyAudio Member
 
Join Date: Apr 2002
Location: Cayman Islands
Quote:
I am trying to do the checkout of the new board I finished populating with all the components.

According to the old schematic (TSE) and checkout procedure on the Tubelab website, you can check the B- voltage by applying test leads between R7.

It looks like R7 has been replaced by R6 on the TSE-II board I have.
Now I understand you. You want to measure the Bias supply voltage.

R7 on the old board (TSE) looks like it was simply there to discharge the bias supply quickly on power down.

On the new board (TSE II) where there is no R7 you can measure anywhere from R6 on the C7 side to the junction with R24 / R25 on one channel or R13 / R14 on the other channel. You only need to measure 1 channel since they use the same bias supply.

Look at the TSE schematic and compare it with the TSE II schematic they are the same really.

Remember you are measuring a - voltage so place your probes accordingly.

I think my TSE II ended up with ~ -200Vdc iirc

Remember the R36 / D6 values / wattage when running over 350 Vdc B+

I run my R36 off board and on the chassis (I use a 50W Aluminum W.W. resistor).
__________________
None of us are leaving this world alive. Enjoy it responsibly as you may.
  Reply With Quote
Old 7th December 2019, 04:12 AM   #8
Duke58 is offline Duke58  United States
diyAudio Member
 
Join Date: Jan 2009
When performing checkout, first time connecting power, ground should be connected like this?
Attached Images
File Type: png Screen Shot 2019-12-06 at 8.10.11 PM.png (39.5 KB, 534 views)
  Reply With Quote
Old 7th December 2019, 12:40 PM   #9
Andrewbee is offline Andrewbee  Jamaica
diyAudio Member
 
Join Date: Apr 2002
Location: Cayman Islands
No, that is signal ground, not power ground.

Look here After a 14 year run, the TSE must DIE! at post #245, there are other pictures from George. Its a bit long but read the whole thread slowly, there is just about all the information you need, its just spread out across the dozens of pages.

I made some notes you can take a look at and hopefully they will help you.

The pages with the Black background are the checkout, leave them for last.

Read the other pages (the pages with the White background) first - several times. Along with the pictures in the link above it should help as you now have a visual reference to the text.

Its' easier to make it right the first time rather than finding and correcting errors.
__________________
None of us are leaving this world alive. Enjoy it responsibly as you may.

Last edited by Andrewbee; 7th December 2019 at 12:41 PM. Reason: No attachments, let me try again.
  Reply With Quote
Old 7th December 2019, 12:43 PM   #10
Andrewbee is offline Andrewbee  Jamaica
diyAudio Member
 
Join Date: Apr 2002
Location: Cayman Islands
I forgot to upload the files in last post. Hopefully I got it right this time!

This is all postings from George, I just made it Cliff notes style.
Attached Files
File Type: pdf SCN_0001.pdf (936.0 KB, 123 views)
File Type: pdf SCN_0002.pdf (995.5 KB, 72 views)
File Type: pdf SCN_0003.pdf (602.2 KB, 62 views)
File Type: pdf SCN_0004.pdf (647.0 KB, 68 views)
File Type: pdf SCN_0005.pdf (529.6 KB, 71 views)
__________________
None of us are leaving this world alive. Enjoy it responsibly as you may.
  Reply With Quote

Reply


Tubelab SE-II CheckoutHide this!Advertise here!
Thread Tools

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Tubelab SE blown rectifier on Checkout bberkom Tubelab 0 1st March 2019 10:48 PM
tubelab sse checkout zxx222 Tubelab 6 5th January 2015 11:37 PM
Started tubelab SE checkout and R5 went into fusion jamicomon Tubelab 6 25th November 2014 12:17 AM
help with tubelab SE checkout evanc Tubelab 2 29th March 2011 12:42 AM
Final checkout problems with Tubelab SE Mazuki Tubelab 11 21st June 2009 01:50 AM


New To Site? Need Help?

All times are GMT. The time now is 11:25 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki