6n1p-ev operating points - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 17th January 2007, 06:24 PM   #1
diyAudio Member
Join Date: Jul 2005
Location: Danbury,CT
Default 6n1p-ev operating points

Hello all,

I'm a newbie here and to diy tubes. I just recently sourced a lifetime's supply of the above tube for my new amp, which I'm about ready to begin construction on. It'll be using the 6n1p-ev driving a triode stapped EL84, interstage coupled.

I've been trying to figure what the best sounding operating point for this tube may be. From what I've been able to glean off the internet, it appears this tube likes to be juiced a bit more than the 6922 types. One author I saw stated 200v @ 10ma, with a grid bias of -2v. The plate curves do look quite good there, and we're still under the max plate dissipation of 2.2 watts, but what looks good on paper doesn't necessarily mean thats where this tube will sound best.

So I would like to rely on the collective wisdom and experience of this group. If any of you have any experience with this tube, or would like to offer any theory or practical suggestions on finding the optimal operating point, please lets have it. I'm trying to soak up as much as possible, and would appreciate any help.

Cheers, Crazy Bill
  Reply With Quote
Old 18th January 2007, 05:58 AM   #2
diyAudio Member
Geek's Avatar
Join Date: Sep 2004
Default Re: 6n1p-ev operating points

Hi Bill, welcome!

Originally posted by crazy bill
....but what looks good on paper doesn't necessarily mean thats where this tube will sound best.
Yes! You have great wisdom already

I played with the 6N1P a few years back and decided it sounded best in a totem arrangement of some sort (SRPP, SEPP, White CF, MWCF, etc)

For single ended use, I found a relation where regardless of voltage (I tested between 125 and 250V), keeping plate dissipation at 1 to 1.1 watt brought out the mids best, while keeping everything else fair neutral.

My humble opinion
  Reply With Quote
Old 22nd January 2007, 01:20 PM   #3
diyAudio Member
Join Date: Jul 2005
Location: Danbury,CT
Hello Geek,

Thanks so much for the reply. Very much appreciated.

I've got a Decware SE84CSEX that I've swapped the PSU caps out for ASC oil caps. ( HUGE sonic improvement over the stock Atoms, BTW ). I'll play with the PS to hit the 6n1p-ev in the range you suggested and listen. Which brings me to another question.

I want the new amp to come to full power w/ under 1.5 v input, which I'm figuring means I need to maximize what the driver stage will do in terms of voltage. Since I'm new at this, it appears to me to be that to do that I need to choose an operating point where the bias current is lower (of course sufficient to stay above the knees in the plate curves), and to keep the voltage higher, so the driver stage will swing enough voltage to drive the EL84's. Have I got this relationship right, or am I missing something.

As always, thanks for your help.

Cheers, Crazy Bill
  Reply With Quote


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
6LW6 operating points AmpKiller66 Tubes / Valves 10 9th December 2014 11:46 AM
6N6P Operating Points Ruach Tubes / Valves 5 11th October 2006 08:43 AM
Operating points for #37 triode Burnedfingers Tubes / Valves 1 27th November 2003 05:10 PM
PX25 operating points bcherry Tubes / Valves 12 27th June 2003 11:24 PM

New To Site? Need Help?

All times are GMT. The time now is 07:13 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2