6N6P and 6SN7 Operating point suggestions - 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 15th September 2006, 07:34 PM   #1
diyAudio Member
 
dsavitsk's Avatar
 
Join Date: Jan 2005
Location: Hartford
Default 6N6P and 6SN7 Operating point suggestions

I am working on a headphone amp that can either use a 6sn7 or a 6n6p (or a 6n1p/6n30p/6dj8 etc.) There is one tube per side (both sections in parallel) transformer coupled to the output. Primary impedance of the OPT is about 10K. I am trying to figure out what B+ to use to accomodate both tubes. 300V puts the 6sn7 (biased to about 7V) with a plate voltage of ~200V at 10mA. The 6n6p would be biased at 6V with a plate voltage of ~140V at 15mA. Are these reasonable spots, or would someone suggest a better operating point for one or both.

I am looking into a regulated PS which would mean that it won't change under load, and that altering it for tube changes would be difficult, so the B+ needs to work for all options if possible.
  Reply With Quote
Old 15th September 2006, 07:38 PM   #2
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Quote:
the 6sn7 (biased to about 7V) with a plate voltage of ~200V at 10mA
Good choice.
__________________
You might be screaming "No, no, no" and all they hear is "Who wants cake?" Let me tell you something: They all do. They all want cake.- Wilford Brimley
  Reply With Quote
Old 17th September 2006, 12:50 AM   #3
aerius is offline aerius  Canada
diyAudio Member
 
Join Date: Sep 2006
Hmm...depends on the 6SN7s you have and the sound you want out of them. For instance I use the RCA grey glass ones which have a very warm & rich sound, when run at 240V & 9mA it was a little too mushy & bloated, but changing it to around 280V & 7.5mA added some needed snap & zing. With my GE 6SN7GTAs it's the other way around, lower voltage & higher current gives a better balance to my ears. They're all good operating points for the 6SN7, it's a matter of taste & tube choice, I'd shy away from running higher voltages in some of the tubes which are prone to arcing over.

The 6n6p I know nothing about so I'll leave that to someone else.
  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
6N6P - recommended operating point pietjers Tubes / Valves 14 22nd June 2009 06:53 PM
Optimal operating point for 7N7/6SN7? pftrvlr Tubes / Valves 5 16th December 2008 04:43 PM
6N6P Operating Points Ruach Tubes / Valves 5 11th October 2006 08:43 AM
6sn7 operating points AudioGeek Tubes / Valves 15 8th September 2005 12:59 PM
Suitable operating point for 6SN7 as a differential driver ? ray_moth Tubes / Valves 15 27th October 2004 08:50 AM


New To Site? Need Help?

All times are GMT. The time now is 08:26 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