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 21st March 2012, 06:08 PM   #11
diyAudio Member
 
Join Date: Nov 2009
Location: Cortez, CO
Many have run these tubes way past 250 plate volts, some close to 600V. You can easily put these in a Dynaco ST-70 with 470 volts.
  Reply With Quote
Old 21st March 2012, 10:30 PM   #12
diyAudio Member
 
Join Date: Dec 2006
Location: Southwest Chicago Suburbs
Quote:
Originally Posted by DeathRex View Post
Many have run these tubes way past 250 plate volts, some close to 600V. You can easily put these in a Dynaco ST-70 with 470 volts.
Yes they will do fine in a Dyna! I even match them at 465 volts on the plate and screen, and I've sold a number that have gone into 500+ volt applications. So I'm speaking from personal experience.

They will run at 25-30 watts dissipation all day and never show any strain.

That 250 volt figure must not be a rated maximum. I can't read Cyrillic, but I suspect that's a "typical operation" point like in western tube manuals.
  Reply With Quote
Old 22nd March 2012, 12:29 AM   #13
diyAudio Member
 
Join Date: Jul 2008
I tried them in a few amps, no problem with 6l6 and 5881 applications. el-34 applications seem to show glowing grids and scorching patterns on the glass that match anode holes....so they won't last long in an el-34 application. bias probing them while on my tube tester puts them in the same Ip range as 6l6's and 5881's. They do sound better than 6l6's.
  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
grid stopper and grid choke on pentode input YouAgain Tubes / Valves 3 12th February 2012 09:32 PM
FS: matched pair EH 300B Gold Grid johnsonad Swap Meet 4 25th April 2011 07:57 AM
mystery 5881 richwalters Tubes / Valves 4 22nd June 2008 07:04 AM
5881 Mas Penk Tubes / Valves 2 23rd November 2006 09:11 PM
Control grid Voltage / grid stoppers... jon_010101 Tubes / Valves 2 4th May 2006 01:59 AM


New To Site? Need Help?

All times are GMT. The time now is 01:15 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