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 17th March 2005, 04:12 PM   #1
Trout is offline Trout  United States
diyAudio Member
 
Trout's Avatar
 
Join Date: Nov 2004
Location: Midwest Madman
Question 25BQ6GTB?? Any Good?

Hello,
Sorting thru several bulk flats I bought over the weekend, Found a bunch of 25BQ6GTB / 25CU6 Beam pentodes and wondered if they would be project worthy.
Any Comments?
Gene
  Reply With Quote
Old 17th March 2005, 04:23 PM   #2
diyAudio Member
 
Sch3mat1c's Avatar
 
Join Date: Jan 2003
Location: Milwaukee, WI
Send a message via ICQ to Sch3mat1c Send a message via AIM to Sch3mat1c
Sure. They're like a rebottled or mini... uh... well I forget what they resemble. I know Colt45 keeps thinking up designs to build that he's too lazy to finish.

Given plate dissipation, you can get at least as much power as a 6V6 per bottle. Maybe a bit more near class B since it's a sweep tube (higher peak current).

A quartet of yours would be great since the heaters can be ran off line (yeah yeah, , but the heaters and cathode are designed for this service, mmm'k), plus a small dropping resistor to bring it up to 120V.

Tim
__________________
Seven Transistor Labs
Projects and Resources
  Reply With Quote
Old 17th March 2005, 04:44 PM   #3
Colt45 is offline Colt45  Serbia
diyAudio Member
 
Join Date: Feb 2002
Location: Canada
Send a message via ICQ to Colt45
I think I ran mine 300v plate, 200v screen, and 400ohm (??) Rk w/ 5kohm OPT. That was a touch over ratings though, I think 13w or so vs. the rated 11(?)


Sounded pretty decent.


If you dont want them, send to me for proper disposal
  Reply With Quote
Old 17th March 2005, 06:22 PM   #4
Trout is offline Trout  United States
diyAudio Member
 
Trout's Avatar
 
Join Date: Nov 2004
Location: Midwest Madman
Sweeeeeeeet,, more keepers

Thanks Guys~!!
  Reply With Quote
Old 18th March 2005, 02:22 AM   #5
diyAudio Member
 
Sch3mat1c's Avatar
 
Join Date: Jan 2003
Location: Milwaukee, WI
Send a message via ICQ to Sch3mat1c Send a message via AIM to Sch3mat1c
Say, if you found these on a "bulk flat", d'zat mean you've got like a hundred of these things? I might want a dozen for putzing around...

Tim
__________________
Seven Transistor Labs
Projects and Resources
  Reply With Quote
Old 18th March 2005, 12:45 PM   #6
Trout is offline Trout  United States
diyAudio Member
 
Trout's Avatar
 
Join Date: Nov 2004
Location: Midwest Madman
Quote:
Originally posted by Sch3mat1c
Say, if you found these on a "bulk flat", d'zat mean you've got like a hundred of these things? I might want a dozen for putzing around...

Tim
Tim,
We bought 26 bulk flats, Most were labeled 100 pc.
But, Alot of the flats were open partials, A few, only had 8 or so tubes. A 2 more were possibly used or pulls.
I only have 6 of this particular tube which Im going to putz with.
As we sort out the mess we bought, I may have tubes to list for sale.
Being auction season here, The Spring/summer quest for gadgets has started eating into most my free time.
gene
  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
What makes the good guitar pickup sound so good? darkfenriz Instruments and Amps 15 1st March 2009 11:46 PM
Good general purpose opamp with good DC specs? speakerguy79 Parts 1 17th November 2006 04:10 AM
Good switch for Stepped attentuater, Good cheap RCA jacks pjpoes Parts 20 10th March 2005 08:47 PM
Pioneer TS-W304C- anyone have good design for it? and is it good for home sub? XteveX Multi-Way 7 28th April 2004 04:05 AM


New To Site? Need Help?

All times are GMT. The time now is 07:16 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