Go Back   Home > Forums > > >

Tubelab Discussion and support of Tubelab products, prototypes and experiments

Reply
 
Thread Tools
Old 24th February 2021, 07:52 PM   #91
TheGimp is offline TheGimp  United States
diyAudio Member
 
TheGimp's Avatar
 
Join Date: Aug 2009
Location: Johnson City, TN
UNSET Schematic from 48.
Attached Images
File Type: png UNSET.png (44.4 KB, 315 views)
__________________
If there are no dogs in Heaven, I don't want to go there.
  Reply With Quote
Old 24th February 2021, 10:35 PM   #92
Francois G is offline Francois G  United States
diyAudio Member
 
Join Date: Jun 2004
Location: Illinois
UNSET is coming?
Many thanks! (I have downloaded LTspice and will hopefully get proficient enough to do this type of thing myself).

Best wishes with your 6P42S experiments and keep us informed.
  Reply With Quote
Old 25th February 2021, 12:03 AM   #93
evanc is offline evanc  United States
diyAudio Member
 
Join Date: Sep 2009
Location: New Jersey. About 1 hour from NYC and 1 min. from the beach
UNSET is coming?
Quote:
Originally Posted by Tubelab_com View Post
I haven't tried the 4D32 in UNSET yet, and tried a 6146 in anything recently.

I did stuff a pair of 4D32's in my Universal Driver push pull test amp.
Look familiar. I believe you have the edcore outputs I had for this project. Hopefully get to see them I use.
Attached Images
File Type: jpg 9D59C3C4-7837-44ED-BD6C-DCCDC38A795E.jpg (212.4 KB, 298 views)
File Type: jpg 6A9332FE-1914-46AE-841F-903C78E0AB76.jpg (127.2 KB, 295 views)
__________________
http://www.evancotler.com
  Reply With Quote
Old 2nd March 2021, 07:36 PM   #94
hareynolds is offline hareynolds  United States
diyAudio Member
 
Join Date: Oct 2008
Default Beta Board (for "hobby planning purposes")

Quote:
Originally Posted by Francois G View Post
Hi George,

Im following this UNSET thread with great interest. For hobby planning purposes, when do you anticipate the PCBs becoming available for purchase?
(a) this is a great phrase,and I have the same question.

(b) Whilst I recognize the artistic merit of Pushing the Limits and Blowing Things Up*, I would be ecstatic with a UNSET that made an honest 10W at low distortion; i.e. a replacement for the TSE 300B (even if it is loaded with SAND. The PowerDrive has made me a Believer.

(c) A Reference Point: if y'all really are getting clean outputs at ~50% of dissipation, this circuit could comfortably get 10W out from select Sylvania 6AV5s (REM those were rebadged as 6B4GAs, and sound pretty good); I am running those right now in uLinear at 400vdc B+ and >22W dissipation with no Embarrassing Redness. (I do know that 6AV5s are difficult to get "overseas", but we Yanks are still up to our gills in them, and it's my Horizontal Sweep Tube of Reference.)

(d) I think this circuit is so promising that TubeLab George could get enough solid commitments for a Beta version of the board, with the advantage that lots of folks would then be Making Mistakes Quickly.
I would be in for AT LEAST a couple. Heck, I still have unbuilt SSE boards with full parts complements, so no worries...

*Blowing Things Up is of course why we all gather 'round TubeLab, like teenagers staring into an engine compartment...
  Reply With Quote
Old 2nd March 2021, 11:00 PM   #95
Parafeed813 is offline Parafeed813  Netherlands
diyAudio Member
 
Join Date: Aug 2012
Quote:
Originally Posted by hareynolds View Post
(I do know that 6AV5s are difficult to get "overseas", but we Yanks are still up to our gills in them, and it's my Horizontal Sweep Tube of Reference.)

(d) I think this circuit is so promising that TubeLab George could get enough solid commitments for a Beta version of the board, with the advantage that lots of folks would then be Making Mistakes Quickly.
I would be in for AT LEAST a couple.
In Europe we have plenty of topcap sweeps: EL36/PL36, PL500/504 (*GB5, not unknown to George) and others.
I also got a bunch of 6CU6 (topcap 6AV5).
And don't forget the Soviet sweeps.
Yes, I'm interested in UNSET
  Reply With Quote
Old 8th March 2021, 08:17 PM   #96
TheGimp is offline TheGimp  United States
diyAudio Member
 
TheGimp's Avatar
 
Join Date: Aug 2009
Location: Johnson City, TN
Francios,

LTSpice is easy to use, and there is lots of information (and models) in the spice model stickie.

Vacuum Tube SPICE Models
__________________
If there are no dogs in Heaven, I don't want to go there.
  Reply With Quote
Old 9th March 2021, 11:52 AM   #97
Francois G is offline Francois G  United States
diyAudio Member
 
Join Date: Jun 2004
Location: Illinois
UNSET is coming?
Thank you, TheGimp! I have bought a book on using LTSpice (albeit for guitar amps), I have downloaded LTspice and Im rearing to go. How is your progress on the 6P41S amp?
  Reply With Quote
Old 9th March 2021, 11:57 AM   #98
Francois G is offline Francois G  United States
diyAudio Member
 
Join Date: Jun 2004
Location: Illinois
UNSET is coming?
Is Tubelab UNSET really coming? Tubelab has been uncharacteristically quiet on this thread for several weeks now. I hope George is OK. He posted on a different thread that he had surgery.

Last edited by Francois G; 9th March 2021 at 12:06 PM.
  Reply With Quote
Old 9th March 2021, 12:05 PM   #99
zintolo is offline zintolo  Italy
diyAudio Member
 
Join Date: Sep 2012
Hi, I've one question: I would like to adapt a cheap chinese SE kit to be used in PSE with EL34 and this kind of design (it is in configuration 12ax7 + octal). Can I reference the grid leak resistor of the output tube to a negative rail instead of ground, and reference the driver Mosfet to ground targeting the output tube cathode to go as close to gnd as possible during peaks? This also would help to keep the grid dc reference stable in case the lnfb plate to grid will be increased to more than 10%.

Thanks
  Reply With Quote
Old 9th March 2021, 12:07 PM   #100
zintolo is offline zintolo  Italy
diyAudio Member
 
Join Date: Sep 2012
Quote:
Originally Posted by Francois G View Post
Tubelab has been uncharacteristically quiet on this thread for several weeks now. I hope George is OK.
Hi Francois, me too I hope George is OK. All the best.
  Reply With Quote

Reply


UNSET is coming?Hide 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
New F6 diy coming soon ? Nounours18200 Pass Labs 37 31st August 2012 04:35 PM
AES coming to NYC Oct 7-10 jackinnj Everything Else 0 14th August 2005 06:00 PM
Zen V7 coming up... Fuling Pass Labs 6 21st October 2004 08:39 PM


New To Site? Need Help?

All times are GMT. The time now is 04:50 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio
Wiki