Running a TSE with 5u4g? - 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 April 2011, 07:13 PM   #1
diyAudio Member
 
Join Date: Nov 2007
Default Running a TSE with 5u4g?

Hi All,

Assuming I have a transformer that can handle the extra draw from the 5U4G, what other mods should be done to the TSE circuitry to best make use of a 5U4G rectifier instead of the 5AR4? This will be done in a 300B TSE. How bad is it for my output tubes if I don't have the slow warm up of the 5AR4?

Thanks,

M
  Reply With Quote
Old 19th April 2011, 11:17 PM   #2
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 5U4 tubes have more tube drop than 5AR4 types. That means your B+ will drop by about 30V or so. As far as warm up, I wouldn't worry about it.
  Reply With Quote
Old 19th April 2011, 11:32 PM   #3
diyAudio Member
 
Join Date: Nov 2007
Great! Thanks for the reply Russ - it's good to know that this experiment won't harm my tubes.

Cheers!
  Reply With Quote
Old 20th April 2011, 02:42 AM   #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
I've run the TSE with a 5U4 without issues.
  Reply With Quote
Old 29th April 2011, 10:15 PM   #5
chrisb is offline chrisb  Canada
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
Default a bit late to the party, but

doncha wanna be a bit more careful with input cap filter on the 5U4 / 5Y3, or even more critically with 5R4?

I'm running one of those fun potato masher Cetron 5R4WGB in a fugly but great sounding rebuild of old Scott integrated - 4mF input cap followed by dual mono choke filtered stage

Click the image to open in full size.

looks more than a little bit out of scale to the noval driver and output stages


5R4 = 4mF
5U4/5Y3= 32mF
5AR4 = 60mF
__________________
now on sabbatical
  Reply With Quote
Old 30th April 2011, 01:30 AM   #6
diyAudio Member
 
tubelab.com's Avatar
 
Join Date: Jul 2005
Location: West Virginia panhandle
Quote:
doncha wanna be a bit more careful with input cap filter on the 5U4 / 5Y3, or even more critically with 5R4?
Some 5U4's can be picky about the input cap. 47uF is technially too much and may cause sparking inside the 5U4 on power up. Put an inrush current limiter in series with the line voltage input to ease the power up surge.

47uF WILL spark the potato masher. I have seen the fireworks!
__________________
Too much power is almost enough! Turn it up till it explodes - then back up just a little.
  Reply With Quote
Old 30th April 2011, 04:30 PM   #7
diyAudio Member
 
Join Date: Nov 2007
Quote:
Originally Posted by tubelab.com View Post
Some 5U4's can be picky about the input cap. 47uF is technially too much and may cause sparking inside the 5U4 on power up. Put an inrush current limiter in series with the line voltage input to ease the power up surge.

47uF WILL spark the potato masher. I have seen the fireworks!
Thanks George. I saw your recommendation for the current limiter in the Simple SE and was going to put it into this build anyway.

Cheers
  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
TSE c4 question evanc Tubelab 4 20th April 2011 03:31 AM
Motor Run vs. Solen in TSE jeffx Tubelab 8 5th March 2011 08:00 PM
2A3 TSE blown Fuse and MOSFET btran Tubelab 5 14th November 2010 07:54 PM
Lost a channel in my TSE oldmanStrat Tubes / Valves 4 26th August 2009 01:13 AM
5u4g vs 5u4gb tenderland Tubes / Valves 3 28th April 2005 08:58 AM


New To Site? Need Help?

All times are GMT. The time now is 02:32 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