Help with Tubelab SE component selection - Page 3 - 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 19th May 2012, 07:33 PM   #21
zman01 is offline zman01  Bangladesh
diyAudio Member
 
Join Date: Feb 2011
Location: Dhaka
Quote:
Originally Posted by boywonder View Post
It's in post #126 here Pictures of your Tubelab amp
Beautiful - your amp looks very nice! Probably enough people have told you already, and 430 man hours is no joke - but the results are sweet . I see it's the Tubelab SE with 300B.

Now that you've been using it for quite some time, how does it sound campared to other amps you've used?
  Reply With Quote
Old 19th May 2012, 09:37 PM   #22
diyAudio Member
 
boywonder's Avatar
 
Join Date: Jan 2008
Location: So.Cal.
Default it makes the sweetest 8 watts of anything in the house..

Quote:
Originally Posted by zman01 View Post
...... how does it sound compared to other amps you've used?
Thanks for the comments, it's my favorite.

Caveat: I have 95db sens full range speakers.......

Last edited by boywonder; 19th May 2012 at 09:41 PM.
  Reply With Quote
Old 19th May 2012, 10:55 PM   #23
zman01 is offline zman01  Bangladesh
diyAudio Member
 
Join Date: Feb 2011
Location: Dhaka
Quote:
Originally Posted by boywonder View Post
Caveat: I have 95db sens full range speakers.......
By full range you mean single driver? Which make?
  Reply With Quote
Old 20th May 2012, 02:40 AM   #24
diyAudio Member
 
boywonder's Avatar
 
Join Date: Jan 2008
Location: So.Cal.
Yes, single driver. Started out with Fostex F207e in Half Changs, now running TB W8-1772's in the Half Changs, both with a sub.
  Reply With Quote
Old 20th May 2012, 12:10 PM   #25
zman01 is offline zman01  Bangladesh
diyAudio Member
 
Join Date: Feb 2011
Location: Dhaka
I'm running single driver full-range units too. Have the subs, and run them in bi-amped config too when I fancy.
  Reply With Quote
Old 4th June 2012, 11:54 PM   #26
zman01 is offline zman01  Bangladesh
diyAudio Member
 
Join Date: Feb 2011
Location: Dhaka
Tubelab has used this in his TSE with 45 tubes with good results:

Transformer - One Electron, Output, 4800 to 16/8/4 | Antique Electronic Supply LLC

IIRC Russ also has/had this in his TSE?

Anybody tried the UBT-2 in their Tubelab SSE?

I have decided to stick with a SE build first, and for the tubes plan to use EL34. The slightly lower primary impedance of 4.8k vs 5k recommended at Tubelab site for SSE builds - that should be ok?
  Reply With Quote
Old 5th June 2012, 05:01 AM   #27
zman01 is offline zman01  Bangladesh
diyAudio Member
 
Join Date: Feb 2011
Location: Dhaka
Quote:
Originally Posted by zman01 View Post
I have decided to stick with a SE build first, and for the tubes plan to use EL34. The slightly lower primary impedance of 4.8k vs 5k recommended at Tubelab site for SSE builds - that should be ok?
Typo identified - it should read I have decided to stick with a SSE build first!

Apologies for the confusion.

Did some reading on the net and looks like the EL34 tubes work well with OPTs within the range 4.8-6k primary impedance. I guess the One Electron should be fine.

Last edited by zman01; 5th June 2012 at 05:09 AM.
  Reply With Quote
Old 5th June 2012, 02:42 PM   #28
diyAudio Member
 
boywonder's Avatar
 
Join Date: Jan 2008
Location: So.Cal.
Quote:
Originally Posted by zman01 View Post
I have decided to stick with a SSE build first, and for the tubes plan to use EL34. The slightly lower primary impedance of 4.8k vs 5k recommended at Tubelab site for SSE builds - that should be ok?
It will be fine. Looking at Tubelab's "tubes and transformer" page for the various tubes and output transformers; he lists the EL34 with 3K and 5K loads at varying B+ voltages. Anything in between these will also work fine, think of it a as a continuum. Note that the power out numbers are for triode wired tubes. Generally, as the load on the output tubes decreases, the power goes up and the distortion goes up.

Tubes & Transformers

Note the red font in the tables, these conditions are where the combination of idle current and B+ exceed the max dissipation rating for the tubes. Many tubes will happily operate over their power dissipation limit, but their lives will be shorter than operating at lower power.

Last edited by boywonder; 5th June 2012 at 02:45 PM.
  Reply With Quote
Old 5th June 2012, 03:59 PM   #29
zman01 is offline zman01  Bangladesh
diyAudio Member
 
Join Date: Feb 2011
Location: Dhaka
Boywonder,

Thanks for confirming and sharing the link - will go ahead! It'll take me quite some time to get all the parts, so probably build will happen mid July.

- Zia
  Reply With Quote
Old 19th June 2012, 06:02 AM   #30
victorm is offline victorm  Australia
diyAudio Member
 
Join Date: Apr 2012
Hello everyone, my first post is unfortunately a little long. Apologies for that.
Just ordered a Tubelab SE board from George and going through the part list in preparation.

Hope someone can help me with a couple of things:

PQ5EV5 voltage regulator is listed on Digikey and mouser as OBSOLETE. They still have quite a few, but as soon as they sell them that'll be it. Is there a replacement recommendation?

High voltage MOSFET's:
Original schematic on the Tubelab web site specified 2SK2700 which is listed as OBSOLETE by Digikey and mouser, and neither of them have it any longer. (you can still get it on eBay but it will disappear soon I think...)

The part list specifies 2SK3563 (higher current - is that necessary?) - but again, it's listed as OBSOLETE, neither Digikey nor mouser have it any longer. Not even eBay.

Appreciate any suggestions,

Cheers,
-Victor
  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
tubelab simple SE Tube selection help saletel Tubelab 10 19th December 2010 05:30 PM
Basic chipamp component selection bcdzt5 Chip Amps 32 12th January 2008 02:05 AM
Component selection for best performance (LM3886). CJ900RR Chip Amps 0 24th February 2006 03:10 PM
Component selection eitanwaks Tubes / Valves 31 4th February 2006 07:27 AM
Need help on speaker design, and component selection BrianGT Multi-Way 5 5th February 2002 04:39 PM


New To Site? Need Help?

All times are GMT. The time now is 04:56 AM.


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