6GF5 sound fine in triode mode ? - 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 9th August 2011, 04:20 PM   #1
aldovan is offline aldovan  Brazil
diyAudio Member
 
Join Date: Jul 2005
Location: Curitiba
Default 6GF5 sound fine in triode mode ?

Friends

Anyone have experience with the 6GF5 in triode mode as output tube ?
This tube have a good sound ?
Comments, please !

Thanks,

Aldovan
  Reply With Quote
Old 9th August 2011, 04:28 PM   #2
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Seems like two threads asking the same question about two different tubes could have been a single thread?
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 12th August 2011, 12:00 PM   #3
aldovan is offline aldovan  Brazil
diyAudio Member
 
Join Date: Jul 2005
Location: Curitiba
Quote:
Originally Posted by kevinkr View Post
Seems like two threads asking the same question about two different tubes could have been a single thread?
Kevin

Not return for none tube !
  Reply With Quote
Old 12th August 2011, 09:34 PM   #4
diyAudio Member
 
Join Date: Sep 2006
The 6GF5 is not too linear by the looks of the GE data sheet, but it would be better triode strapped. High plate resistance and high operating voltage too. The 18A5 curve is really, well, curved. They could be made into a nice amp... but it is too much money and trouble just to use some tubes that are probably only worth $3 each. I have never heard them bit I am always interested in peoples opinions of tubes that are not often used in hifi equipment.

Take a look at the 6p14p and 6p15p.

Last edited by ak_47_boy; 12th August 2011 at 09:53 PM.
  Reply With Quote
Old 12th August 2011, 10:35 PM   #5
aldovan is offline aldovan  Brazil
diyAudio Member
 
Join Date: Jul 2005
Location: Curitiba
Quote:
Originally Posted by ak_47_boy View Post
The 6GF5 is not too linear by the looks of the GE data sheet, but it would be better triode strapped. High plate resistance and high operating voltage too. The 18A5 curve is really, well, curved. They could be made into a nice amp... but it is too much money and trouble just to use some tubes that are probably only worth $3 each. I have never heard them bit I am always interested in peoples opinions of tubes that are not often used in hifi equipment.

Take a look at the 6p14p and 6p15p.
I have this tubes in my hands per U$1 each.
I will get a dozen and make a good test.
Thanks for you opinion !

Aldovan
  Reply With Quote
Old 12th August 2011, 11:40 PM   #6
diyAudio Member
 
smoking-amp's Avatar
 
Join Date: Dec 2001
Location: Hickory, NC
"The 6GF5 is not too linear by the looks of the GE data sheet"

Where is a datasheet for the 6GF5? Nothing on Frank's site.
__________________
I want a Huvr-Board!!
  Reply With Quote
Old 13th August 2011, 12:13 AM   #7
AJT is offline AJT  Philippines
diyAudio Moderator
 
AJT's Avatar
 
Join Date: May 2003
Location: Palatiw, Pasig City
here: NJ7P Tube Database Search
__________________
the best advertisement for a good audio design is the number of diy'ers wanting to build it after all the years....never the say so of so called gurus....
  Reply With Quote
Old 13th August 2011, 12:36 AM   #8
aldovan is offline aldovan  Brazil
diyAudio Member
 
Join Date: Jul 2005
Location: Curitiba
Quote:
Originally Posted by smoking-amp View Post
"The 6GF5 is not too linear by the looks of the GE data sheet"

Where is a datasheet for the 6GF5? Nothing on Frank's site.

I only know this datasheet in the web.
Is RCA and do not have curves:
http://www.jogis-roehrenbude.de/Roeh.../6GF5/6GF5.pdf

Aldovan
  Reply With Quote
Old 13th August 2011, 10:59 AM   #9
diyAudio Member
 
artosalo's Avatar
 
Join Date: Feb 2010
Quote:
This tube have a good sound ?
This depends mostly on the overall circuit design, amount of NFB, output transformer and optimization of the load line and bias etc. Used output tube is only one factor.
  Reply With Quote
Old 13th August 2011, 11:42 PM   #10
aldovan is offline aldovan  Brazil
diyAudio Member
 
Join Date: Jul 2005
Location: Curitiba
Default Plate resistance

Quote:
Originally Posted by smoking-amp View Post
"The 6GF5 is not too linear by the looks of the GE data sheet"

Where is a datasheet for the 6GF5? Nothing on Frank's site.


In the RCA datasheet, the 6GF5 plate resistance is 260 kohms.
This value is correct ? Normally this TV tubes have about 20 kohms of plate resistance...

Aldovan
  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
Electrolytics sound fine bigwill Multi-Way 176 11th March 2012 11:15 PM
12EN6 in triode mode...fine ??? aldovan Tubes / Valves 0 8th January 2011 09:47 PM
AMP10B voltages appear fine....no sound vaughn Class D 0 23rd August 2008 02:27 AM
Using a spdt switch to select between triode mode and pentode mode on a guitar amp. G Tubes / Valves 19 15th March 2006 09:15 AM


New To Site? Need Help?

All times are GMT. The time now is 05:15 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