Output filament suppy - 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 12th June 2011, 06:50 AM   #1
tbie is offline tbie  United States
diyAudio Member
 
Join Date: May 2011
Location: Canton, OH
Default Output filament suppy

Sorry for a dumb question. I am new to tubes and amp building. I completed breadboarding TSE and was going through checkout. George mentions to place a multimeter across filament supply for output tubes. Where exactly should I place the clips?

Thanks.
  Reply With Quote
Old 12th June 2011, 02:50 PM   #2
diyAudio Member
 
Join Date: Apr 2007
Where it says "2" on the board where output tube socket goes.
  Reply With Quote
Old 13th June 2011, 12:08 AM   #3
tbie is offline tbie  United States
diyAudio Member
 
Join Date: May 2011
Location: Canton, OH
Default TSE checkout

Everharmonics, Thank you. It measures 5V at output tube socket. I set this up for 300B so I assume this is what I want.

Output grid voltage at R14 and R25 when set to most negative voltage are -89 and -295V respectively. Is this right? Why the difference?
  Reply With Quote
Old 13th June 2011, 12:50 AM   #4
tbie is offline tbie  United States
diyAudio Member
 
Join Date: May 2011
Location: Canton, OH
Default TSE checkout

Everharmonics, Thank you. It measures 5V at output tube socket. I set this up for 300B so I assume this is what I want.

Output grid voltage at R14 and R25 when set to most negative voltage are -89 and -295V respectively. Is this right? Why the difference?
  Reply With Quote
Old 13th June 2011, 01:23 AM   #5
diyAudio Member
 
Richard Ellis's Avatar
 
Join Date: Sep 2006
Location: Mar del Plata, a BIG seasonal getaway city, can see the Ocean from our residence.
Pins One & Four................at three-o-clock & six-o-clock as you view the tube from the bottom, Keyed at Twelve. 5V @ 1.2A draw.

__________________________________________________ __Rick...........
  Reply With Quote
Old 13th June 2011, 02:13 AM   #6
diyAudio Member
 
Join Date: Apr 2007
Quote:
Originally Posted by tbie View Post
It measures 5V at output tube socket. I set this up for 300B so I assume this is what I want.
Yes.

Quote:
Output grid voltage at R14 and R25 when set to most negative voltage are -89 and -295V respectively. Is this right? Why the difference?
They should be similar (around -80v for mine). Measure from output tube socket where it says "1" in both channels.
  Reply With Quote
Old 13th June 2011, 02:56 AM   #7
tbie is offline tbie  United States
diyAudio Member
 
Join Date: May 2011
Location: Canton, OH
I will check tube socket 1 tomorrow after work. I guess the abnormal voltage has its effect. right channel/speaker is not playing.
B+ is 372V at grid bias of 63mA on Right and 67mA in left. Rectifier is the brightest with bright orange, output tubes barely glow but when seen from top there is glow. No smell of burning plastic either. Don't know why there is o output from right. Any suggestions, I will look into it tomorrow.
By the way, one speaker is way way way loud for a 15X26 foot room. By mistake I omitted volume pot, that thing goes in first. Connected a Denon DVD player with no volume control. Big mistake.
  Reply With Quote
Old 13th June 2011, 02:59 AM   #8
tbie is offline tbie  United States
diyAudio Member
 
Join Date: May 2011
Location: Canton, OH
By the way I connected my old, in the closet, Klipsch synergy B1. This is a tiny bookshelf speaker, the detail is amazing, instruments crisp as crisp could be. I can't wait to get the second channel working.
George, Thanks for such a wonderful design made so simple.
  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
Power suppy TL494 waveform jol50 Car Audio 11 11th March 2010 08:21 PM
xbox power suppy dead guitar_joe Power Supplies 3 2nd July 2008 04:03 AM
Parallel vs. series filament supply - or another filament idea engels Tubes / Valves 11 13th May 2007 01:06 PM
series connection of filament in push pull output stage nhuwar Tubes / Valves 42 10th February 2007 06:27 PM
krell kas power suppy hum minh_827 Solid State 10 16th September 2005 01:44 PM


New To Site? Need Help?

All times are GMT. The time now is 05:38 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