6V6 line preamp - Page 49 - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 3rd February 2012, 07:09 PM   #481
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Assembly begins!
Attached Images
File Type: jpg DSC_0091.JPG (770.6 KB, 424 views)
  Reply With Quote
Old 3rd February 2012, 08:37 PM   #482
diyAudio Member
 
Join Date: Sep 2009
Quote:
Originally Posted by Bas Horneman View Post
I would actually keep them loctal. Because you can or at least could buy cheap loctal teflon sockets.

Sent from my GT-N7000 using Tapatalk
Yes i found them, two pieces for 8 euro !!
  Reply With Quote
Old 3rd February 2012, 08:49 PM   #483
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
I hope those Sylvanias will prove amongst the least microphonic then and you stay loctal.
  Reply With Quote
Old 4th February 2012, 06:57 AM   #484
diyAudio Member
 
Join Date: Sep 2009
I have a pair of Philips 6V6GT also so I can compare them with the Sylvania's
  Reply With Quote
Old 5th February 2012, 12:11 PM   #485
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Asked in SSHV thread, but thought i would ask here too.

"Stupid question, I know. But to do final adjustements with tube attached, does the filament voltage also need to be attached. I would assume that without it, the tube is non operable."

I just wanted to quote myself.
  Reply With Quote
Old 5th February 2012, 12:50 PM   #486
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
that question is stupid , if you know answer

if you don't , then it's not stupid

so - yes - tube needs hot heater for proper operation
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 5th February 2012, 12:58 PM   #487
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
First tube and voltage in hundreds, so no question is stupid. Thanks Zen
  Reply With Quote
Old 5th February 2012, 01:12 PM   #488
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
yadayada
ya know .... serve & protect ....
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 5th February 2012, 02:32 PM   #489
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Any reason why my filament voltage want go above 2V? I get 15V unloaded. I have 2.7 10W instead of parallel 15R and 3.3R. I calculated that this should be correct. Secondary is capable of 3A. What going on?
Pin 2&7 for HV, correct.
  Reply With Quote
Old 5th February 2012, 02:41 PM   #490
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
The Vh will go nominal when the Ih will be nominal through the filament (allowing for +/- tolerance). Check the voltage drop across your LM317T CCS resistor. Does it compute to nominal Ih?
  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
Help me design my DAC/Line Preamp. kuroguy Tubes / Valves 7 2nd April 2009 08:31 PM
preamp line ctt richwalters Tubes / Valves 1 7th March 2008 04:34 PM
Preamp for Line In and Mic blur Instruments and Amps 1 4th January 2007 04:02 PM
Line stage preamp, based on SY's "Heretical Unity gain line stage" Danko Tubes / Valves 23 18th July 2005 04:07 AM
Line preamp for 2A3 amp Petman Tubes / Valves 0 24th May 2002 03:11 PM


New To Site? Need Help?

All times are GMT. The time now is 11:23 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